CN110441213A - Coal sample computing permeability simulation test device and its test method - Google Patents

Coal sample computing permeability simulation test device and its test method Download PDF

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Publication number
CN110441213A
CN110441213A CN201910788727.3A CN201910788727A CN110441213A CN 110441213 A CN110441213 A CN 110441213A CN 201910788727 A CN201910788727 A CN 201910788727A CN 110441213 A CN110441213 A CN 110441213A
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China
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pressure
vertical
coal
fixedly connected
coal sample
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CN201910788727.3A
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CN110441213B (en
Inventor
许浩
辛福东
汤达祯
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China University of Geosciences Beijing
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China University of Geosciences Beijing
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/44—Sample treatment involving radiation, e.g. heat
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/0806—Details, e.g. sample holders, mounting samples for testing
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
    • G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
    • G01N15/082—Investigating permeability by forcing a fluid through a sample
    • G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/22—Fuels, explosives
    • G01N33/222—Solid fuels, e.g. coal
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N1/00—Sampling; Preparing specimens for investigation
    • G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
    • G01N1/286—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q involving mechanical work, e.g. chopping, disintegrating, compacting, homogenising
    • G01N2001/2873—Cutting or cleaving

Abstract

Coal sample computing permeability simulation test device, including testing stand, heating module, air-dry module, it is sliced module, tie up pressure-break test module and dimension pressure osmosis module, the upper surface of testing stand is fixedly connected with table top frame, heating module is fixedly mounted on the upper surface of testing stand and is located in table top frame, the upper surface of testing stand is placed with the coal sample block in rectangular parallelepiped structure, the front and rear sides of coal sample block are arranged in heating module, air-dried module is arranged in the upper surface of testing stand and is located at table top frame left, module is air-dried to dry towards heating module and coal sample block, slice module is mounted on table top frame internal upper part and is located at the surface of coal sample block, dimension pressure-break test module is mounted on the right side of table top frame, dimension pressure osmosis module is mounted on the upside of table top frame.Design science of the present invention, it is structurally reasonable, the internal fissure situation of coal sample block under heating air drying condition is studied by way of simulation, can cost-effectively explore the crack changing rule of the coal seam reservoirs of different height.

Description

Coal sample computing permeability simulation test device and its test method
Technical field
The present invention relates to coal seam penetration testing technical fields, specifically, are related to a kind of coal sample computing permeability simulation examination Experiment device and its test method.
Background technique
As a kind of clean energy resource, the development and utilization of coal bed gas, which not only improve, solves the problems, such as safety of coal mines, is also beneficial to protect The discharge for hindering China's natural gas supply, reducing greenhouse gases.China's coal bed gas resource is abundant, but the exploration of coal bed gas so far Development effectiveness is unsatisfactory, and the lower permeability of coal seam reservoirs becomes an important factor for restricting coal bed gas product.
The mode that pressure break is generallyd use during cbm development is transformed coal seam reservoirs, however traditional pressure break in addition to It will cause water pollution and may induce earthquake, prior, softer for quality such as low coal ranks coal seam reservoirs, pressure break is to reservoir Correctional effect is poor.It was found that being also easy to produce a large amount of microcrack in matrix of coal during heating coal petrography, especially low coal Rank reservoir, with heating large quantity of moisture removing, reservoir is shunk obviously, to generate a large amount of crack, reservoir permeability is shown Writing improves.Still lack effective exploration at present due to improving coal seam reservoirs by way of heating, carries out implementing experiment not in underground Only it is costly and difficult to the propagation law in observation crack.
In order to solve the above problems, people are seeking always a kind of ideal technical solution.
Summary of the invention
The object of the present invention is to provide a kind of coal sample computing permeability simulation test devices and its test method, the present invention to set Meter science, it is structurally reasonable, the internal fissure situation of coal sample block under heating air drying condition is studied by way of simulation, passes through application The coal seam reservoirs of different dimension pressure pressure simulation different heights, the crack that can cost-effectively explore the coal seam reservoirs of different height becomes Law provides the research method that one kind is intuitive, can quantify for the transformation of coal seam reservoirs.
To achieve the above object, the present invention adopts the following technical scheme:
Coal sample computing permeability simulation test device, including testing stand, heating module, air-dried module, slice module, dimension pressure-break Test module and dimension pressure osmosis module, the upper surface of testing stand are fixedly connected with table top frame, and heating module is fixedly mounted on examination It tests the upper surface of platform and is located in table top frame, the upper surface of testing stand is placed with the coal sample block in rectangular parallelepiped structure, heated mould The front and rear sides of coal sample block are arranged in block, and air-dried module is arranged in the upper surface of testing stand and is located at table top frame left, air-dries Module is dried towards heating module and coal sample block, slice module be mounted on table top frame internal upper part and be located at coal sample block just on Side, dimension pressure-break test module are mounted on the right side of table top frame, and dimension pressure osmosis module is mounted on the upside of table top frame.
Table top frame includes four first vertical supporting beams, and the lower end of four first vertical supporting beams is fixedly connected on test The upper surface left side of platform, two first vertical supporting beams between the upper end of two first vertical supporting beams in left side and right side Upper end between be fixedly connected to one piece of horizontally disposed first connecting plate along the longitudinal direction, it is solid between two piece of first connecting plate Surely it is connected with one piece of horizontally disposed first lateral supporting plate in left-right direction.
Heating module includes the identical heating component of three row's structures, wherein symmetrically and along right and left before and after two rows of heating components To vertically arranged, another row's heating component is vertically arranged along the longitudinal direction and is located at the left side of front two rows heating component, coal sample Block is located at the centre of the surrounded c-type fence frame of three row's heating components, and every row's heating component includes several adding thermal resistance sticks, respectively Vertically interval is fixedly mounted on the upper surface of testing stand root adding thermal resistance stick；
Air-drying module includes three the first air blowers, and three the first air blowers arrange along the longitudinal direction is fixedly mounted on testing stand Left side, the first air blower of front side from it is left front to the right after towards front side each adding thermal resistance stick air blast, the first intermediate drum Blower is from left to right towards the left side air blast of coal sample block, each from the left back previous dynasty to the right to rear side of the first air blower of rear side Adding thermal resistance stick air blast.
Being sliced module includes two sets of back-and-forth motion components, two set of first lifting assembly, two wire motors, wire cutting copper Silk, wire cutting power supply and a set of push away coal component；Two sets of back-and-forth motion modular constructions are identical and are symmetrical set, left side it is a set of Being moved forward and backward component includes two first guiding slide bars, the first lead screw and the first sliding block, two first guiding slide bars and first Thick stick is horizontally disposed with along the longitudinal direction, and the rear and front ends of two first guiding slide bars are respectively fixedly connected with two first in left side On the downside of the middle part of vertical supporting beam, the rear and front end of the first lead screw is rotatably installed in two first vertical supporting beams in left side respectively Middle part on the downside of, for two first guiding slide bars between the upper and lower every setting, the first lead screw is located at two first centres for being oriented to slide bar, two Root first is oriented to slide bar and the first lead screw both passes through the first sliding block, the first sliding block and two first guiding sliding bar connections, the One sliding block and the transmission connection of the first threads of lead screw, the front end of the first lead screw pass through the leading flank of the first vertical supporting beam of front left side And it is fixedly connected with rotation handwheel；
The structure of two set of first lifting assembly is identical and is symmetrical set, by one piece along a left side between two set of first lifting assembly Horizontally disposed second connecting plate of right direction is fixedly connected, and first lifting assembly in left side includes right angle fixed plate, two pieces second It is oriented to slide bar, the second lead screw, the first vertical feed motor and the second sliding block, the epipleural of right angle fixed plate is horizontally disposed, right angle The lower side panel of fixed plate is vertically arranged, the epipleural right edge of right angle fixed plate and the lower side panel upper side edge one of right angle fixed plate The upper surface of connection, the upper surface of the epipleural of right angle fixed plate and the second connecting plate is concordant, the lower side panel of right angle fixed plate Right side is fixedly connected on the left end of the second connecting plate, and two second guiding slide bars and the second lead screw are vertically arranged, and two The upper and lower ends of two guiding slide bars are respectively fixedly connected with lower side panel left side following side and first sliding block in right angle fixed plate Left side, the upper and lower ends of the second lead screw are rotatably installed in the lower side panel left side following side of right angle fixed plate and first respectively and slide The left side of block, two second guiding slide bar time interval settings, the second lead screw are located at the centre of two second guiding slide bars, the The cylinder body of one vertical feed motor is fixedly mounted on the epipleural upper surface of right angle fixed plate, the power of the first vertical feed motor Output shaft passes perpendicularly through the epipleural of right angle fixed plate, the lower end of the power output shaft of the first vertical feed motor and the second lead screw Upper end be fixedly connected, two second guiding slide bars and the second lead screw both pass through the second sliding block, and the second sliding block and two second lead It is connected to sliding bar, the second sliding block and the transmission connection of the second threads of lead screw；
Several horizontally disposed support rods in left-right direction, two wire motors point are fixedly connected between two the second sliding blocks The left side and right side of each support rod are not fixedly connected on by attachment base bilateral symmetry, wire cutting power supply is fixedly mounted on The middle part of each support rod, two wire motors are arranged along the longitudinal direction, are fixedly connected on the downside of two wire motors The central axis of a piece vertically arranged L-type strut, L-type strut and wire motor is located in the same vertical plane, L-type strut packet Vertical bar and horizon bar are included, the upper end of vertical bar is fixedly connected on the rear end of wire motor, and level is set horizon bar along the longitudinal direction It sets, the rear end of horizon bar is fixedly connected with the lower end of vertical bar, and the front side line shaft of wire motor is fixedly installed with driving roller, The front end of horizon bar is rotatably equipped with driven roller, and two driving rollers and two driven rollers are located in the same vertical plane, Wire cutting copper wire is sleeved on two driving rollers and two driven rollers and in rectangle tensioning state, and wire cutting power supply is with two A wire motor electrical connection；
It pushes away coal component to include sliding rail, sliding panel and push away coal gas cylinder, sliding rail is horizontal along the longitudinal direction to be fixedly connected on the upper of testing stand Surface and be located at left side two first vertical supporting beams between, sliding panel is vertically arranged, and the following side of sliding panel is slidably connected On the slide rail, the upper end of sliding panel is fixedly connected on the downside of second sliding block in left side, and it is horizontal in left-right direction to push away coal gas cylinder Setting, the cylinder body for pushing away coal gas cylinder are fixedly connected in the middle part of the left side of sliding panel, and the piston rod for pushing away coal gas cylinder passes through horizontally to the right Sliding panel, the piston rod right end for pushing away coal gas cylinder are fixedly connected with vertical push plate, and vertical push plate is located on the left of the left side of coal sample block And gap between two adding thermal resistance sticks adjacent with left side or so is corresponding.
Tieing up pressure-break test module includes two vertical supports, crack test suite, first level dimension pressure component and first Vertical dimension presses component, and two vertical supports structures are identical and front and back is symmetrical arranged, and the vertical supports of front side include the second vertical branch Beam and the second cross-brace beam are supportted, the lower end of the second vertical supporting beam is fixedly connected on front side of the upper surface right side of testing stand, Second cross-brace beam is horizontally disposed in left-right direction, and it is first perpendicular to be fixedly connected on forward right side for the left end of the second cross-brace beam To the right flank middle part of supporting beam, the right end of the second cross-brace beam is fixedly connected on the upper end of the second vertical supporting beam, before right A set of move left and right is fixedly connected between the leading flank of first vertical supporting beam of side and the leading flank of the second vertical supporting beam Component, be fixedly connected between the right side of two second vertical supporting beams one piece it is vertically arranged first vertical along the longitudinal direction The upper surface left and right side of connecting plate, two second cross-brace beams is fixedly connected with one piece along right and left by connecting bracket To horizontally disposed third connecting plate, first level dimension pressure component is mounted on the first vertical connecting plate, the first vertical dimension pressure group Part is mounted on third connecting plate, is offered on one in left-right direction respectively on front side of the upper surface left side of testing stand with rear side Under penetrating long guiding hole, the upper surface middle part of testing stand offers a transparent adjusting long hole along the longitudinal direction, adjusts Section long hole is located at the right side of two first vertical supporting beams on right side, adjusts in long hole and is vertically plugged with one piece of lift pressure tune Plate is saved, the lower surface of testing stand is fixedly connected with the adjustment seat for being located at and adjusting on the downside of long hole, is threaded with two in adjustment seat The fastening bolt of time interval setting vertically opens up the lifting long hole penetrating there are two left and right in lift pressure regulator panel, Two fastening bolts are each passed through two lifting long holes, are threaded with a locking nut in two fastening bolts, lifting Between locking nut and adjustment seat, locking nut compresses lift pressure regulator panel and makes lift pressure formula pressure regulator panel Power adjustable plate is fixedly connected with adjustment seat；
Moving left and right component includes two third guiding slide bars, third lead screw, traverse feed motor and Four-slider, two thirds Guiding slide bar and third lead screw are horizontally disposed in left-right direction, and the left and right ends of two third guiding slide bars are respectively fixedly connected with In the leading flank of the first vertical supporting beam of forward right side and the leading flank of the second vertical supporting beam, the left and right ends point of third lead screw It is not rotatably installed in the leading flank of the first vertical supporting beam of forward right side and the leading flank of the second vertical supporting beam, two thirds are led To slide bar between the upper and lower every setting, third lead screw is located at the centre of two third guiding slide bars, and traverse feed motor is in left-right direction It is fixedly connected on the leading flank of the first vertical supporting beam of forward right side, the right end and third of the power output shaft of traverse feed motor The left end of lead screw is fixedly connected, and two thirds guiding slide bars and third lead screw both pass through third sliding block, and third sliding block and two pieces the Three guiding sliding bar connections, third sliding block and the transmission connection of third threads of lead screw, the trailing flank of third sliding block is fixedly connected with One piece of second vertical connecting plate being arranged in left-right direction, the lower end of the second vertical connecting plate pass through the long guiding hole of front side, the The trailing flank of two vertical connecting plates is equipped with the second lifting assembly；
Second lifting assembly include two the 4th guiding slide bar, the 4th lead screw, the second vertical feed motor and Four-sliders, two 4th guiding slide bar and the 4th lead screw are vertically arranged, and the upper and lower ends of two the 4th guiding slide bars are respectively fixedly connected with second The upper lateral part and following side, the upper and lower ends of the 4th lead screw of the trailing flank of vertical connecting plate are rotatably installed in second respectively and vertically connect The upper lateral part of the trailing flank of fishplate bar and following side, the setting of two the 4th guiding slide bar time intervals, the 4th lead screw are located at two pieces the The centre of four guiding slide bars, the second vertical feed motor are fixedly mounted on the upper lateral part of the trailing flank of the second vertical connecting plate, the The lower end of the power output shaft of two vertical feed motors is fixedly connected with the upper end of the 4th lead screw, two the 4th guiding slide bars and Four lead screws both pass through Four-slider, Four-slider and two the 4th guiding sliding bar connections, Four-slider and the 4th lead screw spiral shell Line transmission connection；
Crack test suite includes laser emitter and laser pickoff, and laser emitter and laser pickoff distinguish correspondence It is mounted on two Four-sliders；
First level dimension pressure component includes that first pressure adjusts stud, first pressure sensor and first pressure adjustable plate, and first Pressure adjusts stud and first pressure sensor is horizontally disposed in left-right direction, and first pressure adjustable plate is vertical along the longitudinal direction Setting, first pressure adjust the middle part that stud passes perpendicularly through the first vertical connecting plate, and first pressure adjusts stud and is threaded in On first vertical connecting plate, the left end that first pressure adjusts stud is rotatably installed in the right end of first pressure sensor, the first pressure The left end of force snesor is fixedly connected on the right flank middle part of first pressure adjustable plate, and the height of first pressure adjustable plate is less than Two vertical supporting depths of beam, the distance between the lower side of first pressure adjustable plate and the upper surface of testing stand are 2-5mm, the One pressure regulator panel and lift pressure regulator panel or so are corresponding；
First vertical dimension pressure component includes that second pressure adjusts stud, second pressure sensor and second pressure adjustable plate, and second Pressure adjusts stud and second pressure sensor is vertically arranged, and second pressure adjustable plate is horizontally disposed in left-right direction, and second Pressure adjusts the middle part that stud passes perpendicularly through third connecting plate, and second pressure adjusts stud and is threaded on third connecting plate, The lower end that second pressure adjusts stud is rotatably installed in the upper end of second pressure sensor, and the lower end of second pressure sensor is fixed It is connected to the upper surface middle part of second pressure adjustable plate, the length of the length of second pressure adjustable plate less than the second cross-brace beam Degree.
Dimension pressure osmosis module includes the second air blower and dimension pressure case, and the second air blower is fixedly mounted on the first lateral supporting plate Upper surface, the air outlet and dimension of the second air blower, which are pressed, is connected with a blast pipe between case, along gas flow direction on blast pipe It is disposed with control ball valve, air inlet flowmeter and aspiration pressure table, dimension pressure case includes that the second lateral supporting plate, left risers and the right side are vertical Plate, the second lateral supporting plate are horizontally disposed in left-right direction, and the downside forward right side and right lateral side of the second lateral supporting plate pass through respectively A piece third vertical supporting beam is fixedly connected on the upper surface right side of two second cross-brace beams, a left side for the second lateral supporting plate Side is fixedly connected on the right side upper lateral part of two first vertical supporting beams on right side, and left risers and right risers are along the longitudinal direction Vertically arranged, the downside of left risers and the downside of right risers are respectively fixedly connected on the left of the upper surface of the second lateral supporting plate Portion and right side, left risers are identical with right risers structure and are symmetrical set, and the right side of left risers is equipped with groove, blast pipe It is connected in the middle part of the left side of left risers and is connected to groove, the upper surface middle part of the second lateral supporting plate is connected with c-type supporting plate, C Type supporting plate is vertically arranged along the longitudinal direction and gap downward, be symmetrically installed with second before and after the front side board and back side panel of c-type supporting plate Level dimension pressure component, the horizontal dimension pressure component of the second of front side includes that third pressure adjusts stud, third pressure sensor and third Pressure regulator panel, third pressure adjusts stud and third pressure sensor is horizontally disposed with along the longitudinal direction, and third pressure is adjusted Plate is vertically arranged in left-right direction, and third pressure adjusts the middle part that stud passes perpendicularly through the front side board of c-type supporting plate, third pressure tune Section stud is threaded on the front side board of c-type supporting plate, and the rear end thereof that third pressure adjusts stud is mounted on third pressure biography The front end of sensor, the rear end of third pressure sensor are fixedly connected in the middle part of the leading flank of third pressure regulator panel, c-type supporting plate Epipleural is equipped with the second vertical dimension pressure component, and it includes that the 4th pressure adjusts stud, the 4th pressure passes that the second vertical dimension, which presses component, Sensor and the 4th pressure regulator panel, the 4th pressure adjusts stud and the 4th pressure sensor is vertically arranged, and the 4th pressure is adjusted Plate is horizontally disposed in left-right direction, and the 4th pressure adjusts the middle part that stud passes perpendicularly through the epipleural of c-type supporting plate, the 4th pressure tune Section stud is threaded on the epipleural of c-type supporting plate, and the lower end that the 4th pressure adjusts stud is rotatably installed in the 4th pressure biography The upper end of sensor, the lower end of the 4th pressure sensor are fixedly connected on the upper surface middle part of the 4th pressure regulator panel, and second laterally Supporting plate, left risers, right risers, two pieces of third pressure regulator panels and the 4th pressure regulator panel surround dimension pressure case, the right side of right risers Face is equipped with the imbibition test pressure gauge being connected to the groove on right side.
The test method of coal sample computing permeability simulation test device, comprising the following steps:
(1), it heats and air-dries coal sample block, so that coal sample block is generated crack: the coal sample block made is placed on two rows of adding thermal resistance sticks Between testing stand upper surface, coal sample block is made of lignite, and each adding thermal resistance stick is powered and is heated to coal sample block, is opened simultaneously Three the first blower motors, three the first blower motor blow airs are moved, the air advertised is heated into through each adding thermal resistance stick Hot-air, coal sample block air-dry under hot air acting, and crack is generated inside coal sample block；
(2), the coal sample block after air-drying repeatedly is sliced, and the coal piece cut is pushed into the position of dimension pressure-break test module It sets, dimension pressure-break test is carried out to every lump coal piece, then the crack imaging of every lump coal piece is subjected to three-dimensional splicing and is realized to coal sample block Whole internal fissure imaging；
(3), step (1) is repeated, then the coal sample block after air-drying is placed in dimension pressure case, the second air blower of starting carries out dimension pressure and seeps Test thoroughly.
Step (2) specifically: after coal sample block air-dries, close each adding thermal resistance stick and the first blower motor, start simultaneously Two the first vertical feed motors and two wire motors, the line shaft of the first vertical feed motor rotate forward and drive the second lead screw Rotation, second the second sliding block of lead screw transmission are moved down along the second guiding slide bar, and the second sliding block drives each support rod to moving down Dynamic, support rod drives two wire motors to move down, and two wire motors drive wire cutting copper wire to moving down by L-type strut Dynamic, the line shaft of two wire motors rotates synchronously, so that two driving rollers rotate synchronously, two driving roller band moving-wires are cut Copper wire rotation is cut, in this way, wire cutting copper wire is downwards once sliced coal sample block, after completing primary slice, two is closed and walks Silk motor, while making two the first vertical feed motor reversals, to make the second sliding block under the driving of the second lead screw to moving up It is dynamic, and then each support rod is driven to move up, each support rod drives two wire motors to move up, two wire motors It drives wire cutting copper wire to move up by L-type strut, then locking nut is unscrewed, move down lift pressure regulator panel To on the downside of the upper surface of testing stand, starting pushes away coal gas cylinder, and the piston rod for pushing away coal gas cylinder stretches out to the right, then vertical push plate will be cut Coal piece is pushed into adjust the right side of long hole to the right, makes coal piece between laser emitter and laser pickoff, then by lift Pressure regulator panel moves up on the upside of the upper surface of testing stand, tightens locking nut to consolidate lift pressure regulator panel It is scheduled in adjustment seat, so that coal piece be made to be located at first pressure adjustable plate, second pressure adjustable plate, lift pressure regulator panel and examination It tests in the dimension pressure space that the upper surface of platform surrounds, stud is adjusted by first pressure and second pressure adjusts stud and can adjust respectively The dimension pressure pressure of first pressure adjustable plate and second pressure adjustable plate, and then the coal seam reservoirs of different height are simulated, first when initial The dimension pressure pressure that pressure sensor and second pressure sensor are shown is 0；
Laser emitter and laser pickoff be separately fixed at front side and rear side Four-slider on, in this way, laser emitter and Laser pickoff is located in two planar movement systems and synchronizing moving, when coal on piece is there are when crack, laser emitter The laser of transmitting will synchronize in the plane continuous moving by crack directive laser pickoff, two pieces of Four-sliders, from And make laser emitter and laser pickoff to the crack imaging of coal piece entirety, stud and second pressure are adjusted by first pressure Adjust the dimension pressure pressure that stud adjusts first pressure adjustable plate and second pressure adjustable plate respectively, first pressure adjustable plate and second When pressure regulator panel carries out dimension pressure to coal piece, the crack in coal piece, which is shunk, to become smaller, again by laser emitter and laser pick-off Device presses different dimensional the crack imaging after Coal Under piece overall shrinkage；
Make two the first sliding blocks are synchronous to be oriented to along the longitudinal direction at corresponding two first respectively by rotating two rotation handwheels It is slided on slide bar, and then makes two set of first lifting assembly, two wire motors, wire cutting copper wire and push away coal component and move back Dynamic, wire cutting copper wire is moved to right above coal sample block, is then sliced again, adjacent two heating electricity in each moving distance and left side Gap width between resistance stick is identical to guarantee that the thickness of every lump coal piece is identical, so completes repeatedly slice, and to every lump coal Piece carries out crack imaging, then the crack imaging of every lump coal piece is carried out three-dimensional splicing realization to the internal fissure of coal sample block entirety Imaging.
Step (3) specifically: repeat step (1) and obtain air-dried coal sample block, coal sample block is put into dimension pressure case, starting the Two air blowers open control ball valve, and the air mass flow and pressure that the second air blower is blown into dimension pressure case pass through air intake respectively Meter and aspiration pressure table are measured, and air after coal sample block imbibition, tests pressure gauge by imbibition and measure imbibition in dimension pressure case Air pressure afterwards can so calculate according to the air pressure of front and back since the spatial volume in dimension pressure case is constant and acquire infiltration The air quality of front and back adjusts stud and the 4th by adjusting third pressure so that the true permeability of coal sample block be calculated Pressure adjusts stud and obtains the variation of the true permeability of coal sample block under different dimensional pressure pressure.
Design science of the present invention, it is structurally reasonable, the inside of coal sample block under heating air drying condition is studied by way of simulation Crack situation simulates the coal seam reservoirs of different height by applying different dimension pressure pressures, can cost-effectively explore different height The crack changing rule of the coal seam reservoirs of degree provides the research method that one kind is intuitive, can quantify for the transformation of coal seam reservoirs.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is heating module of the invention, air-dries module and be sliced arrangement schematic diagram of the module on testing stand.
Fig. 3 is the arrangement schematic diagram of dimension pressure-break test module and dimension pressure osmosis module of the invention on testing stand.
Fig. 4 is the structural schematic diagram of dimension pressure-break test module of the invention.
Specific embodiment
The following is further explained with reference to the attached drawings the embodiment of the present invention.
As Figure 1-Figure 4, coal sample computing permeability simulation test device, including testing stand 1, heating module, air-dried mould Block, slice module, dimension pressure-break test module and dimension pressure osmosis module, the upper surface of testing stand 1 are fixedly connected with table top frame, Heating module is fixedly mounted on the upper surface of testing stand 1 and is located in table top frame, and the upper surface of testing stand 1 is placed in rectangular The front and rear sides of coal sample block 2 are arranged in the coal sample block 2 of body structure, heating module, and the upper surface of testing stand 1 is arranged in air-dried module And it is located at table top frame left, it air-dries module and dries towards heating module and coal sample block 2, slice module is mounted in table top frame Top and the surface for being located at coal sample block 2, dimension pressure-break test module are mounted on the right side of table top frame, dimension pressure osmosis module peace Mounted in the upside of table top frame.
Table top frame includes four first vertical supporting beams 3, and the lower end of four first vertical supporting beams 3 is fixedly connected on examination Test the upper surface left side of platform 1, two first of between the upper end of two first vertical supporting beams 3 in left side and right side vertically prop up It supports and is fixedly connected to one piece of horizontally disposed first connecting plate 4 along the longitudinal direction, two piece of first connecting plate between the upper end of beam 3 One piece of horizontally disposed first lateral supporting plate 5 in left-right direction is fixedly connected between 4.
Heating module includes the identical heating component of three row's structures, wherein symmetrically and along right and left before and after two rows of heating components To vertically arranged, another row's heating component is vertically arranged along the longitudinal direction and is located at the left side of front two rows heating component, coal sample Block 2 is located at the centre of the surrounded c-type fence frame of three row's heating components, and every row's heating component includes several adding thermal resistance sticks 6, The vertical interval of each adding thermal resistance stick 6 is fixedly mounted on the upper surface of testing stand 1；
Air-drying module includes three the first air blowers 7, and three the first air blowers 7 arrange along the longitudinal direction is fixedly mounted on testing stand 1 left side, the first air blower 7 of front side from it is left front to the right after towards front side each 6 air blast of adding thermal resistance stick, intermediate One air blower 7 from left to right towards the left side air blast of coal sample block 2, the first air blower 7 of rear side from the left back previous dynasty to the right backward Each 6 air blast of adding thermal resistance stick of side.
Being sliced module includes two sets of back-and-forth motion components, two set of first lifting assembly, two wire motors 8, wire cutting copper Silk 9, wire cutting power supply 73 and a set of push away coal component；Two sets of back-and-forth motion modular constructions are identical and are symmetrical set, left side A set of back-and-forth motion component includes two first guiding slide bars 10, the first lead screw 11 and the first sliding block 12, and two first guiding are slided Bar 10 and the first lead screw 11 are horizontally disposed with along the longitudinal direction, and the rear and front end of two first guiding slide bars 10 is respectively fixedly connected with On the downside of the middle part of two first vertical supporting beams 3 in left side, the rear and front end of the first lead screw 11 is rotatably installed in left side respectively Two first vertical supporting beams 3 middle part on the downside of, between the upper and lower every setting, the first lead screw 11 is located at two first guiding slide bars 10 The centre of two first guiding slide bars 10, two first guiding slide bars 10 and the first lead screw 11 both pass through the first sliding block 12, and first Sliding block 12 and two first guiding slide bars 10 are slidably connected, and the first sliding block 12 is connected with 11 screw-driven of the first lead screw, and first The front end of thick stick 11 passes through the leading flank of the first vertical supporting beam 3 of front left side and is fixedly connected with rotation handwheel 13；
The structure of two set of first lifting assembly is identical and is symmetrical set, by one piece along a left side between two set of first lifting assembly Horizontally disposed second connecting plate 14 of right direction is fixedly connected, and first lifting assembly in left side includes right angle fixed plate 15, two Second guiding slide bar 16, the second lead screw 17, the first vertical feed motor 18 and the second sliding block 19, the epipleural of right angle fixed plate 15 Horizontally disposed, the lower side panel of right angle fixed plate 15 is vertically arranged, the epipleural right edge and right angle fixed plate of right angle fixed plate 15 The upper surface of 15 lower side panel upper side edge integrally connected, the upper surface of the epipleural of right angle fixed plate 15 and the second connecting plate 14 is flat Together, the right side of the lower side panel of right angle fixed plate 15 is fixedly connected on the left end of the second connecting plate 14, two second guiding slide bars 16 and second lead screw 17 it is vertically arranged, two second guiding slide bars 16 upper and lower ends be respectively fixedly connected in right angle fixed plate The upper and lower ends of the left side of 15 lower side panel left side following side and the first sliding block 12, the second lead screw 17 are rotatably installed in respectively The left side of the lower side panel left side following side of right angle fixed plate 15 and the first sliding block 12, between two second guiding slide bars, 16 front and back Every setting, the second lead screw 17 is located at the centre of two second guiding slide bars 16, the fixed peace of the cylinder body of the first vertical feed motor 18 Mounted in the epipleural upper surface of right angle fixed plate 15, the power output shaft of the first vertical feed motor 18 passes perpendicularly through right angle and fixes The epipleural of plate 15, the lower end of the power output shaft of the first vertical feed motor 18 are fixedly connected with the upper end of the second lead screw 17, Two second guiding slide bars 16 and the second lead screw 17 both pass through the second sliding block 19, the second sliding block 19 and two second guiding slide bars 16 It is slidably connected, the second sliding block 19 is connected with 17 screw-driven of the second lead screw；
Several horizontally disposed support rods 20 in left-right direction, two wire electricity are fixedly connected between two the second sliding blocks 19 Machine 8 is fixedly connected on the left side and right side of each support rod 20, wire cutting power supply by 21 bilateral symmetry of attachment base respectively 73 are fixedly mounted on the middle part of each support rod 20, and two wire motors 8 are arranged along the longitudinal direction, two wire motors 8 Downside is fixedly connected to a vertically arranged L-type strut 22, and the central axis of L-type strut 22 and wire motor 8 is located at same In perpendicular, L-type strut 22 includes vertical bar and horizon bar, and the upper end of vertical bar is fixedly connected on the rear end of wire motor 8, Horizon bar is horizontally disposed with along the longitudinal direction, and the rear end of horizon bar is fixedly connected with the lower end of vertical bar, and the front side of wire motor 8 is dynamic Power axis is fixedly installed with driving roller 74, and the front end of horizon bar is rotatably equipped with driven roller 75, two driving rollers 74 and two A driven roller 75 is located in the same vertical plane, and wire cutting copper wire 9 is sleeved on two driving rollers 74 and two driven rollers It on 75 and is in rectangle tensioning state, wire cutting power supply 73 is electrically connected with two wire motors 8；
It pushes away coal component to include sliding rail 23, sliding panel 24 and push away coal gas cylinder 25, level is fixedly connected on examination to sliding rail 23 along the longitudinal direction It tests the upper surface of platform 1 and is located between two first vertical supporting beams 3 in left side, sliding panel 24 is vertically arranged, sliding panel 24 Following side is slidably connected on sliding rail 23, and the upper end of sliding panel 24 is fixedly connected on the downside of second sliding block 19 in left side, is pushed away Coal gas cylinder 25 is horizontally disposed in left-right direction, and the cylinder body for pushing away coal gas cylinder 25 is fixedly connected in the middle part of the left side of sliding panel 24, is pushed away The piston rod of coal gas cylinder 25 passes through sliding panel 24 horizontally to the right, and the piston rod right end for pushing away coal gas cylinder 25 is fixedly connected with vertical push plate 26, it is left that vertical push plate 26 is located at the gap on the left of the left side of coal sample block 2 and with left side between adjacent two adding thermal resistance sticks 6 Right correspondence.
Tieing up pressure-break test module includes two vertical supports, crack test suite, first level dimension pressure component and first Vertical dimension presses component, and two vertical supports structures are identical and front and back is symmetrical arranged, and the vertical supports of front side include the second vertical branch Beam 27 and the second cross-brace beam 28 are supportted, the lower end of the second vertical supporting beam 27 is fixedly connected on the right side of the upper surface of testing stand 1 On front side of portion, the second cross-brace beam 28 is horizontally disposed in left-right direction, and the left end of the second cross-brace beam 28 is fixedly connected on the right side The right flank middle part of first vertical supporting beam 3 of front side, the right end of the second cross-brace beam 28 are fixedly connected on the second vertical branch The upper end for supportting beam 27, it is solid between the leading flank of the first vertical supporting beam 3 of forward right side and the leading flank of the second vertical supporting beam 27 Surely be connected with it is a set of move left and right component, one piece is fixedly connected between the right side of two second vertical supporting beams 27 along front and back The first vertically arranged vertical connecting plate 29 of direction, the upper surface left and right side of two second cross-brace beams 28 pass through connection Bracket 71 is fixedly connected with one piece of horizontally disposed third connecting plate 30 in left-right direction, and first level dimension pressure component is mounted on the On one vertical connecting plate 29, the first vertical dimension pressure component is mounted on third connecting plate 30, before the upper surface left side of testing stand 1 Side and rear side offer a transparent long guiding hole 31 in left-right direction respectively, and the upper surface middle part of testing stand 1 is before Rear direction offers a transparent adjusting long hole 32, adjusts two first vertical supporting beams 3 that long hole 32 is located at right side Right side, adjust long hole 32 in be vertically plugged with one piece of lift pressure regulator panel 33, the lower surface of testing stand 1 is fixedly connected with Positioned at the adjustment seat 34 for adjusting 32 downside of long hole, the fastening bolt of two time intervals setting is threaded in adjustment seat 34 35, the lifting long hole 36 penetrating there are two left and right is vertically opened up in lift pressure regulator panel 33, two fastening bolts 35 are divided Not Chuan Guo two lifting long holes 36, a locking nut is threaded in two fastening bolts 35, lift pressure is adjusted Between locking nut and adjustment seat 34, locking nut compresses lift pressure regulator panel 33 and makes lift pressure tune plate 33 Section plate 33 is fixedly connected with adjustment seat 34；
Moving left and right component includes that two thirds are oriented to slide bars 37, third lead screw 38, traverse feed motor 39 and third sliding block 40, Two third guiding slide bars 37 and third lead screw 38 are horizontally disposed in left-right direction, the left and right two of two third guiding slide bars 37 End is respectively fixedly connected with the leading flank of leading flank and the second vertical supporting beam 27 in the first vertical supporting beam 3 of forward right side, the The left and right ends of three lead screws 38 are rotatably installed in the leading flank and the second vertical supporting of the first vertical supporting beam 3 of forward right side respectively The leading flank of beam 27, between the upper and lower every setting, third lead screw 38 is located at two thirds and is oriented to slide bar 37 two third guiding slide bars 37 Centre, traverse feed motor 39 is fixedly connected on the leading flank of the first vertical supporting beam 3 of forward right side in left-right direction, laterally The right end of power output shaft for feeding motor 39 is fixedly connected with the left end of third lead screw 38, and two thirds are oriented to slide bars 37 and the Three lead screws 38 both pass through third sliding block 40, and third sliding block 40 and two third guiding slide bars 37 are slidably connected, 40 He of third sliding block The connection of 38 screw-driven of third lead screw, the trailing flank of third sliding block 40 be fixedly connected with one piece be arranged in left-right direction it is second perpendicular To connecting plate 41, the lower end of the second vertical connecting plate 41 passes through the long guiding hole 31 of front side, the rear side of the second vertical connecting plate 41 Face is equipped with the second lifting assembly；
Second lifting assembly is sliding including two the 4th guiding slide bars 42, the 4th lead screw 43, the second vertical feed motor 44 and the 4th Block 45, two the 4th guiding slide bars 42 and the 4th lead screw 43 are vertically arranged, the upper and lower ends point of two the 4th guiding slide bars 42 It is not fixedly connected on upper lateral part and the following side of the trailing flank of the second vertical connecting plate 41, the upper and lower ends difference of the 4th lead screw 43 It is rotatably installed in upper lateral part and the following side of the trailing flank of the second vertical connecting plate 41, two the 4th guiding 42 time intervals of slide bar Setting, the 4th lead screw 43 are located at the centre of two the 4th guiding slide bars 42, and the second vertical feed motor 44 is fixedly mounted on second The upper lateral part of the trailing flank of vertical connecting plate 41, the lower end of the power output shaft of the second vertical feed motor 44 and the 4th lead screw 43 Upper end be fixedly connected, two the 4th guiding slide bars 42 and the 4th lead screw 43 both pass through Four-slider 45, Four-slider 45 and two Root the 4th is oriented to slide bar 42 and is slidably connected, and Four-slider 45 is connected with 43 screw-driven of the 4th lead screw；
Crack test suite includes laser emitter 46 and laser pickoff 47, and laser emitter 46 and laser pickoff 47 are distinguished Correspondence is mounted on two Four-sliders 45；
First level dimension pressure component includes that first pressure adjusts stud 48, first pressure sensor 49 and first pressure adjustable plate 50, first pressure adjusts stud 48 and first pressure sensor 49 is horizontally disposed in left-right direction, first pressure adjustable plate 50 Vertically arranged along the longitudinal direction, first pressure adjusts the middle part that stud 48 passes perpendicularly through the first vertical connecting plate 29, first pressure It adjusts stud 48 to be threaded on the first vertical connecting plate 29, the left end that first pressure adjusts stud 48 is rotatably installed in first The right end of pressure sensor 49, the left end of first pressure sensor 49 are fixedly connected in the right side of first pressure adjustable plate 50 Portion, height of the height less than the second vertical supporting beam 27 of first pressure adjustable plate 50, the lower side of first pressure adjustable plate 50 The distance between upper surface of testing stand 1 is 2-5mm, first pressure adjustable plate 50 and 33 or so pairs of lift pressure regulator panel It answers；
First vertical dimension pressure component includes that second pressure adjusts stud 51, second pressure sensor 52 and second pressure adjustable plate 53, second pressure adjusts stud 51 and second pressure sensor 52 is vertically arranged, and second pressure adjustable plate 53 is in left-right direction Horizontally disposed, second pressure adjusts the middle part that stud 51 passes perpendicularly through third connecting plate 30, and second pressure adjusts 51 screw thread of stud It is connected on third connecting plate 30, the lower end that second pressure adjusts stud 51 is rotatably installed in the upper of second pressure sensor 52 End, the lower end of second pressure sensor 52 are fixedly connected on the upper surface middle part of second pressure adjustable plate 53, and second pressure is adjusted Length of the length of plate 53 less than the second cross-brace beam 28.
Dimension pressure osmosis module includes the second air blower 54 and dimension pressure case, and the second air blower 54 is fixedly mounted on first and laterally props up The upper surface of plate 5, the air outlet and dimension of the second air blower 54, which are pressed, is connected with a blast pipe 55 between case, along gas on blast pipe 55 Body flow direction, which is disposed with, controls ball valve 56, air inlet flowmeter 57 and aspiration pressure table 58, and dimension pressure case includes second lateral Supporting plate 59, left risers 60 and right risers 61, the second lateral supporting plate 59 are horizontally disposed in left-right direction, under the second lateral supporting plate 59 Side forward right side and right lateral side pass through a third vertical supporting beam 62 respectively and are fixedly connected on two second cross-brace beams 28 Upper surface right side, the left side of the second lateral supporting plate 59 is fixedly connected on the right side of two first vertical supporting beams 3 on right side Face upper lateral part, left risers 60 and right risers 61 are vertically arranged along the longitudinal direction, the downsides of left risers 60 and right risers 61 Downside is respectively fixedly connected in the upper surface left side and right side of the second lateral supporting plate 59,61 knot of left risers 60 and right risers Structure is identical and is symmetrical set, and the right side of left risers 60 is equipped with groove, and blast pipe 55 is connected to the left side of left risers 60 It middle part and is connected to groove, the upper surface middle part of the second lateral supporting plate 59 is connected with c-type supporting plate 63, and c-type supporting plate 63 is along front and back Downward to vertically arranged and gap, it is symmetrically installed with the second horizontal dimension pressure component before and after the front side board of c-type supporting plate 63 and back side panel, The horizontal dimension pressure component of the second of front side includes that third pressure adjusts stud 64, third pressure sensor 65 and third pressure regulator panel 66, third pressure adjusts stud 64 and third pressure sensor 65 is horizontally disposed with along the longitudinal direction, third pressure regulator panel 66 Vertically arranged in left-right direction, third pressure adjusts the middle part that stud 64 passes perpendicularly through the front side board of c-type supporting plate 63, third pressure It adjusts stud 64 to be threaded on the front side board of c-type supporting plate 63, the rear end thereof that third pressure adjusts stud 64 is mounted on the The front end of three pressure sensors 65, the rear end of third pressure sensor 65 are fixedly connected on the leading flank of third pressure regulator panel 66 Middle part, the epipleural of c-type supporting plate 63 are equipped with the second vertical dimension pressure component, and the second vertical dimension presses component to adjust including the 4th pressure Stud 67, the 4th pressure sensor 68 and the 4th pressure regulator panel 69, the 4th pressure adjust stud 67 and the 4th pressure sensor 68 is vertically arranged, and the 4th pressure regulator panel 69 is horizontally disposed in left-right direction, and the 4th pressure adjusts stud 67 and passes perpendicularly through c-type The middle part of the epipleural of supporting plate 63, the 4th pressure adjust stud 67 and are threaded on the epipleural of c-type supporting plate 63, the 4th pressure The lower end for adjusting stud 67 is rotatably installed in the upper end of the 4th pressure sensor 68, and the lower end of the 4th pressure sensor 68 is fixed to be connected Connect the upper surface middle part in the 4th pressure regulator panel 69, the second lateral supporting plate 59,61, two pieces of left risers 60, right risers third pressures Power adjustable plate 66 and the 4th pressure regulator panel 69 surround dimension pressure case, and the right side of right risers 61 is equipped with to be connected to the groove on right side Imbibition test pressure gauge 70.
The test method of coal sample computing permeability simulation test device, comprising the following steps:
(1), it heats and air-dries coal sample block 2, so that coal sample block 2 is generated crack: the coal sample block 2 made is placed on two rows of adding thermal resistances The upper surface of testing stand 1 between stick 6, coal sample block 2 are made of lignite, and each adding thermal resistance stick 6 is powered and is added to coal sample block 2 Heat, while starting three the first blower motors, three the first blower motor blow airs, the air advertised is through each adding thermal resistance Stick 6 is heated into hot-air, and coal sample block 2 air-dries under hot air acting, generates crack inside coal sample block 2；
(2), the coal sample block 2 after air-drying repeatedly is sliced, and the coal piece 72 cut is pushed into dimension pressure-break test module Position carries out dimension pressure-break test to every lump coal piece, then the crack imaging of every lump coal piece is carried out three-dimensional splicing and is realized to coal sample The whole internal fissure imaging of block 2；
(3), step (1) is repeated, then the coal sample block 2 after air-drying is placed in dimension pressure case, the second air blower 54 of starting is tieed up Press penetration testing.
Step (2) specifically: after coal sample block 2 air-dries, close each adding thermal resistance stick 6 and the first blower motor, open simultaneously Dynamic two the first vertical feed motors 18 and two wire motors 8, the line shaft of the first vertical feed motor 18 are rotated forward and are driven The rotation of second lead screw 17, the second lead screw 17 are driven the second sliding block 19 and move down along the second guiding slide bar 16,19 band of the second sliding block It moves each support rod 20 to move down, support rod 20 drives two wire motors 8 to move down, and two wire motors 8 pass through L-type Strut 22 drives wire cutting copper wire 9 to move down, and the line shaft of two wire motors 8 rotates synchronously, thus two driving rollers 74 rotate synchronously, and two driving rollers 74 drive wire cutting copper wires 9 to rotate, in this way, wire cutting copper wire 9 downwards to coal sample block 2 into The primary slice of row closes two wire motors 8 after completing primary slice, while making two the first vertical feed motor 18 reversions, To make the second sliding block 19 move up under the driving of the second lead screw 17, and then each support rod 20 is driven to move up, respectively Root support rod 20 drives two wire motors 8 to move up, and two wire motors 8 drive wire cutting copper wire 9 by L-type strut 22 It moves up, then locking nut is unscrewed, be moved downward to lift pressure regulator panel 33 on the downside of the upper surface of testing stand 1, Starting pushes away coal gas cylinder 25, and the piston rod for pushing away coal gas cylinder 25 stretches out to the right, then the coal piece cut is pushed into adjust to the right by vertical push plate 26 The right side for saving long hole 32, makes coal piece between laser emitter 46 and laser pickoff 47, then adjusts lift pressure Plate 33 moves up on the upside of the upper surface of testing stand 1, tightens locking nut to which lift pressure regulator panel 33 is fixed In adjustment seat 34, so that coal piece be made to be located at first pressure adjustable plate 50, second pressure adjustable plate 53, lift pressure regulator panel 33 and testing stand 1 the dimension pressure space that surrounds of upper surface in, pass through first pressure and adjust stud 48 and second pressure and adjust stud 51 can adjust the dimension pressure pressure of first pressure adjustable plate 50 and second pressure adjustable plate 53 respectively, and then simulate the coal of different height Reservoir, the dimension pressure pressure that first pressure sensor 49 and second pressure sensor 52 are shown when initial are 0；
Laser emitter 46 and laser pickoff 47 are separately fixed on the Four-slider 45 of front side and rear side, in this way, laser is sent out Emitter 46 and laser pickoff 47 are located in two planar movement systems and synchronizing moving, when coal on piece is there are when crack, The laser that laser emitter 46 emits will by crack directive laser pickoff 47, two pieces of Four-sliders 45 in the plane Synchronous continuous moving passes through the first pressure to make laser emitter 46 and laser pickoff 47 to the crack imaging of coal piece entirety Power adjusts stud 48 and second pressure and adjusts stud 51 adjusts first pressure adjustable plate 50 and second pressure adjustable plate 53 respectively When dimension pressure pressure, first pressure adjustable plate 50 and second pressure adjustable plate 53 carry out dimension pressure to coal piece, the crack in coal piece is shunk Become smaller, the crack after Coal Under piece overall shrinkage is pressed different dimensional again by laser emitter 46 and laser pickoff 47 at Picture；
Keep two the first sliding blocks 12 synchronous respectively along the longitudinal direction at corresponding two first by rotating two rotation handwheels 13 It is slided on guiding slide bar 10, and then makes two set of first lifting assembly, two wire motors 8, wire cutting copper wire 9 and to push away coal component equal It moves backward, wire cutting copper wire 9 is moved to right above coal sample block 2, is then sliced again, adjacent the two of each moving distance and left side Gap width between root adding thermal resistance stick 6 is identical to guarantee that the thickness of every lump coal piece is identical, so completes repeatedly slice, and Crack imaging is carried out to every lump coal piece, then the crack imaging of every lump coal piece is subjected to three-dimensional splicing and is realized to 2 entirety of coal sample block Internal fissure imaging.
Step (3) specifically: repeat step (1) and obtain air-dried coal sample block 2, coal sample block 2 is put into dimension pressure case, starting Second air blower 54 opens control ball valve 56, and the air mass flow and pressure that the second air blower 54 is blown into dimension pressure case are led to respectively It crosses air inlet flowmeter 57 and aspiration pressure table 58 is measured, air after 2 imbibition of coal sample block, is tested by imbibition and pressed in dimension pressure case Power table 70 measures the air pressure after imbibition, since the spatial volume in dimension pressure case is constant, so according to the air pressure of front and back The air quality for acquiring infiltration front and back can be calculated, so that the true permeability of coal sample block 2 is calculated, by adjusting third pressure It adjusts stud 64 and the 4th pressure adjusts stud 67 and obtains the variation of the true permeability of coal sample block 2 under different dimensional pressure pressure.
Design science of the present invention, it is structurally reasonable, the inside of coal sample block under heating air drying condition is studied by way of simulation Crack situation simulates the coal seam reservoirs of different height by applying different dimension pressure pressures, can cost-effectively explore different height The crack changing rule of the coal seam reservoirs of degree provides the research method that one kind is intuitive, can quantify for the transformation of coal seam reservoirs.
The above embodiments are only used to illustrate and not limit the technical solutions of the present invention, although referring to above-described embodiment to this hair It is bright to be described in detail, those skilled in the art should understand that；Still the present invention can be modified or be waited With replacement, without departing from the spirit or scope of the invention, or any substitutions, should all cover in power of the invention In sharp claimed range.

Claims (10)

1. coal sample computing permeability simulation test device, it is characterised in that: including testing stand, heating module, air-dry module, slice Module, dimension pressure-break test module and dimension pressure osmosis module, the upper surface of testing stand is fixedly connected with table top frame, heating module It is fixedly mounted on the upper surface of testing stand and is located in table top frame, the upper surface of testing stand is placed with the coal in rectangular parallelepiped structure The front and rear sides of coal sample block are arranged in sample block, heating module, and air-dried module is arranged in the upper surface of testing stand and is located at table top frame It on the left of frame, air-dries module and dries towards heating module and coal sample block, slice module is mounted on table top frame internal upper part and is located at coal The surface of sample block, dimension pressure-break test module are mounted on the right side of table top frame, and dimension pressure osmosis module is mounted on table top frame Upside.
2. coal sample computing permeability simulation test device according to claim 1, it is characterised in that: table top frame includes four The lower end of root the first vertical supporting beam, four first vertical supporting beams is fixedly connected on the upper surface left side of testing stand, left side Two first vertical supporting beams upper end between and right side two first vertical supporting beams upper end between be fixedly connected with There is one piece of horizontally disposed first connecting plate along the longitudinal direction, is fixedly connected with one piece along right and left between two piece of first connecting plate To the horizontally disposed first lateral supporting plate.
3. coal sample computing permeability simulation test device according to claim 2, it is characterised in that: heating module includes three The identical heating component of structure is arranged, wherein symmetrical and vertically arranged in left-right direction before and after two rows of heating components, another row's heating Component is vertically arranged along the longitudinal direction and is located at the left side of front two rows heating component, and coal sample block is located at three row's heating components and is enclosed At the centre of c-type fence frame, every row's heating component includes several adding thermal resistance sticks, and each adding thermal resistance stick is vertically spaced It is fixedly mounted on the upper surface of testing stand；
Air-drying module includes three the first air blowers, and three the first air blowers arrange along the longitudinal direction is fixedly mounted on testing stand Left side, the first air blower of front side from it is left front to the right after towards front side each adding thermal resistance stick air blast, the first intermediate drum Blower is from left to right towards the left side air blast of coal sample block, each from the left back previous dynasty to the right to rear side of the first air blower of rear side Adding thermal resistance stick air blast.
4. coal sample computing permeability simulation test device according to claim 3, it is characterised in that: slice module includes two Set is moved forward and backward component, two set of first lifting assembly, two wire motors, wire cutting copper wire, wire cutting power supply and a set of pushes away coal Component；Two sets of back-and-forth motion modular constructions are identical and are symmetrical set, and a set of back-and-forth motion component in left side includes two pieces the One guiding slide bar, the first lead screw and the first sliding block, two first guiding slide bars and the first lead screw are horizontally disposed with along the longitudinal direction, The rear and front end of two first guiding slide bars is respectively fixedly connected on the downside of the middle part of two first vertical supporting beams in left side, the The rear and front end of one lead screw is rotatably installed in respectively on the downside of the middle part of two first vertical supporting beams in left side, two first guiding For slide bar between the upper and lower every setting, the first lead screw is located at the centres of two first guiding slide bars, two first guiding slide bars and first Thick stick both passes through the first sliding block, and the first sliding block and two first guiding sliding bar connections, the first sliding block and the first threads of lead screw pass Dynamic connection, the front end of the first lead screw pass through the leading flank of the first vertical supporting beam of front left side and are fixedly connected with rotation handwheel；
The structure of two set of first lifting assembly is identical and is symmetrical set, by one piece along a left side between two set of first lifting assembly Horizontally disposed second connecting plate of right direction is fixedly connected, and first lifting assembly in left side includes right angle fixed plate, two pieces second It is oriented to slide bar, the second lead screw, the first vertical feed motor and the second sliding block, the epipleural of right angle fixed plate is horizontally disposed, right angle The lower side panel of fixed plate is vertically arranged, the epipleural right edge of right angle fixed plate and the lower side panel upper side edge one of right angle fixed plate The upper surface of connection, the upper surface of the epipleural of right angle fixed plate and the second connecting plate is concordant, the lower side panel of right angle fixed plate Right side is fixedly connected on the left end of the second connecting plate, and two second guiding slide bars and the second lead screw are vertically arranged, and two The upper and lower ends of two guiding slide bars are respectively fixedly connected with lower side panel left side following side and first sliding block in right angle fixed plate Left side, the upper and lower ends of the second lead screw are rotatably installed in the lower side panel left side following side of right angle fixed plate and first respectively and slide The left side of block, two second guiding slide bar time interval settings, the second lead screw are located at the centre of two second guiding slide bars, the The cylinder body of one vertical feed motor is fixedly mounted on the epipleural upper surface of right angle fixed plate, the power of the first vertical feed motor Output shaft passes perpendicularly through the epipleural of right angle fixed plate, the lower end of the power output shaft of the first vertical feed motor and the second lead screw Upper end be fixedly connected, two second guiding slide bars and the second lead screw both pass through the second sliding block, and the second sliding block and two second lead It is connected to sliding bar, the second sliding block and the transmission connection of the second threads of lead screw；
Several horizontally disposed support rods in left-right direction, two wire motors point are fixedly connected between two the second sliding blocks The left side and right side of each support rod are not fixedly connected on by attachment base bilateral symmetry, wire cutting power supply is fixedly mounted on The middle part of each support rod, two wire motors are arranged along the longitudinal direction, are fixedly connected on the downside of two wire motors The central axis of a piece vertically arranged L-type strut, L-type strut and wire motor is located in the same vertical plane, L-type strut packet Vertical bar and horizon bar are included, the upper end of vertical bar is fixedly connected on the rear end of wire motor, and level is set horizon bar along the longitudinal direction It sets, the rear end of horizon bar is fixedly connected with the lower end of vertical bar, and the front side line shaft of wire motor is fixedly installed with driving roller, The front end of horizon bar is rotatably equipped with driven roller, and two driving rollers and two driven rollers are located in the same vertical plane, Wire cutting copper wire is sleeved on two driving rollers and two driven rollers and in rectangle tensioning state, and wire cutting power supply is with two A wire motor electrical connection；
It pushes away coal component to include sliding rail, sliding panel and push away coal gas cylinder, sliding rail is horizontal along the longitudinal direction to be fixedly connected on the upper of testing stand Surface and be located at left side two first vertical supporting beams between, sliding panel is vertically arranged, and the following side of sliding panel is slidably connected On the slide rail, the upper end of sliding panel is fixedly connected on the downside of second sliding block in left side, and it is horizontal in left-right direction to push away coal gas cylinder Setting, the cylinder body for pushing away coal gas cylinder are fixedly connected in the middle part of the left side of sliding panel, and the piston rod for pushing away coal gas cylinder passes through horizontally to the right Sliding panel, the piston rod right end for pushing away coal gas cylinder are fixedly connected with vertical push plate, and vertical push plate is located on the left of the left side of coal sample block And gap between two adding thermal resistance sticks adjacent with left side or so is corresponding.
5. coal sample computing permeability simulation test device according to claim 4, it is characterised in that: dimension pressure-break tests mould Block includes that two vertical supports, crack test suite, first level dimension pressure component and the first vertical dimension press component, two vertical branch Frame structure is identical and front and back is symmetrical arranged, and the vertical supports of front side include the second vertical supporting beam and the second cross-brace beam, the The lower end of two vertical supporting beams is fixedly connected on front side of the upper surface right side of testing stand, and the second cross-brace beam is in left-right direction Horizontally disposed, the left end of the second cross-brace beam is fixedly connected on the right flank middle part of the first vertical supporting beam of forward right side, the The right end of two cross-brace beams is fixedly connected on the upper end of the second vertical supporting beam, the front side of the first vertical supporting beam of forward right side Be fixedly connected between face and the leading flank of the second vertical supporting beam it is a set of move left and right component, two second vertical supporting beams One piece of vertically arranged first vertical connecting plate along the longitudinal direction, two second cross-brace beams are fixedly connected between right side Upper surface left and right side one piece of horizontally disposed third connecting plate in left-right direction is fixedly connected with by connecting bracket, One horizontal dimension pressure component is mounted on the first vertical connecting plate, and the first vertical dimension pressure component is mounted on third connecting plate, is tested On front side of the upper surface left side of platform and rear side offers a transparent long guiding hole in left-right direction respectively, testing stand Upper surface middle part offers a transparent adjusting long hole along the longitudinal direction, adjusts long hole and is located at two first of right side and erects It to the right side of supporting beam, adjusts and is vertically plugged with one piece of lift pressure regulator panel in long hole, the lower surface of testing stand is fixed to be connected It is connected to the adjustment seat for being located at and adjusting on the downside of long hole, the fastening bolt of two time intervals setting is threaded in adjustment seat, is risen The lifting long hole penetrating there are two left and right is vertically opened up in drop formula pressure regulator panel, two fastening bolts are each passed through two and rise Drop long hole, be threaded with a locking nut in two fastening bolts, lift pressure regulator panel be located at locking nut with Between adjustment seat, locking nut compresses lift pressure regulator panel and is fixedly connected with lift pressure regulator panel with adjustment seat.
6. coal sample computing permeability simulation test device according to claim 5, it is characterised in that: move left and right component packet Include two third guiding slide bars, third lead screw, traverse feed motor and Four-slider, two third guiding slide bars and third lead screw It is horizontally disposed in left-right direction, the left and right ends of two thirds guiding slide bars are respectively fixedly connected in the first vertical of forward right side The leading flank of the leading flank of supporting beam and the second vertical supporting beam, the left and right ends of third lead screw are rotatably installed in forward right side respectively The first vertical supporting beam leading flank and the second vertical supporting beam leading flank, two thirds guiding slide bars are between the upper and lower every setting It sets, third lead screw is located at the centre of two third guiding slide bars, and traverse feed motor is fixedly connected on forward right side in left-right direction The first vertical supporting beam leading flank, the left end of the right end of the power output shaft of traverse feed motor and third lead screw is fixed to be connected It connects, two third guiding slide bars and third lead screw both pass through third sliding block, and third sliding block and two third guiding sliding bars connect It connects, third sliding block and the transmission connection of third threads of lead screw, the trailing flank of third sliding block is fixedly connected with one piece and sets in left-right direction The vertical connecting plate of second set, the lower end of the second vertical connecting plate pass through the long guiding hole of front side, after the second vertical connecting plate Side is equipped with the second lifting assembly；
Second lifting assembly include two the 4th guiding slide bar, the 4th lead screw, the second vertical feed motor and Four-sliders, two 4th guiding slide bar and the 4th lead screw are vertically arranged, and the upper and lower ends of two the 4th guiding slide bars are respectively fixedly connected with second The upper lateral part and following side, the upper and lower ends of the 4th lead screw of the trailing flank of vertical connecting plate are rotatably installed in second respectively and vertically connect The upper lateral part of the trailing flank of fishplate bar and following side, the setting of two the 4th guiding slide bar time intervals, the 4th lead screw are located at two pieces the The centre of four guiding slide bars, the second vertical feed motor are fixedly mounted on the upper lateral part of the trailing flank of the second vertical connecting plate, the The lower end of the power output shaft of two vertical feed motors is fixedly connected with the upper end of the 4th lead screw, two the 4th guiding slide bars and Four lead screws both pass through Four-slider, Four-slider and two the 4th guiding sliding bar connections, Four-slider and the 4th lead screw spiral shell Line transmission connection；
Crack test suite includes laser emitter and laser pickoff, and laser emitter and laser pickoff distinguish correspondence It is mounted on two Four-sliders；
First level dimension pressure component includes that first pressure adjusts stud, first pressure sensor and first pressure adjustable plate, and first Pressure adjusts stud and first pressure sensor is horizontally disposed in left-right direction, and first pressure adjustable plate is vertical along the longitudinal direction Setting, first pressure adjust the middle part that stud passes perpendicularly through the first vertical connecting plate, and first pressure adjusts stud and is threaded in On first vertical connecting plate, the left end that first pressure adjusts stud is rotatably installed in the right end of first pressure sensor, the first pressure The left end of force snesor is fixedly connected on the right flank middle part of first pressure adjustable plate, and the height of first pressure adjustable plate is less than Two vertical supporting depths of beam, the distance between the lower side of first pressure adjustable plate and the upper surface of testing stand are 2-5mm, the One pressure regulator panel and lift pressure regulator panel or so are corresponding；
First vertical dimension pressure component includes that second pressure adjusts stud, second pressure sensor and second pressure adjustable plate, and second Pressure adjusts stud and second pressure sensor is vertically arranged, and second pressure adjustable plate is horizontally disposed in left-right direction, and second Pressure adjusts the middle part that stud passes perpendicularly through third connecting plate, and second pressure adjusts stud and is threaded on third connecting plate, The lower end that second pressure adjusts stud is rotatably installed in the upper end of second pressure sensor, and the lower end of second pressure sensor is fixed It is connected to the upper surface middle part of second pressure adjustable plate, the length of the length of second pressure adjustable plate less than the second cross-brace beam Degree.
7. coal sample computing permeability simulation test device according to claim 6, it is characterised in that: dimension pressure osmosis module packet The second air blower and dimension pressure case are included, the second air blower is fixedly mounted on the upper surface of the first lateral supporting plate, and the second air blower goes out Be connected with a blast pipe between air port and dimension pressure case, on blast pipe along gas flow direction be disposed with control ball valve, into Distinguished and admirable meter and aspiration pressure table, dimension pressure case include the second lateral supporting plate, left risers and right risers, and the second lateral supporting plate is along left and right Direction is horizontally disposed, and the downside forward right side and right lateral side of the second lateral supporting plate pass through a third vertical supporting beam respectively and fix It is connected to the upper surface right side of two second cross-brace beams, two of right side are fixedly connected on the left of the second lateral supporting plate The right side upper lateral part of first vertical supporting beam, left risers and right risers are vertically arranged along the longitudinal direction, the downside of left risers Face and the downside of right risers are respectively fixedly connected in the upper surface left side and right side, left risers and the right side of the second lateral supporting plate Vertical plate structure is identical and is symmetrical set, and the right side of left risers is equipped with groove, and blast pipe is connected to the left side of left risers It middle part and is connected to groove, the upper surface middle part of the second lateral supporting plate is connected with c-type supporting plate, and c-type supporting plate is vertical along the longitudinal direction Setting and gap is downward, is symmetrically installed with the second horizontal dimension pressure component before and after the front side board and back side panel of c-type supporting plate, and the of front side Two horizontal dimension pressure components include that third pressure adjusts stud, third pressure sensor and third pressure regulator panel, third pressure tune Section stud and third pressure sensor are horizontally disposed with along the longitudinal direction, and third pressure regulator panel is vertically arranged in left-right direction, Third pressure adjusts the middle part that stud passes perpendicularly through the front side board of c-type supporting plate, and third pressure adjusts stud and is threaded in c-type branch On the front side board of plate, the rear end thereof that third pressure adjusts stud is mounted on the front end of third pressure sensor, and third pressure passes The rear end of sensor is fixedly connected in the middle part of the leading flank of third pressure regulator panel, and it is vertical that the epipleural of c-type supporting plate is equipped with second Dimension pressure component, it includes that the 4th pressure adjusts stud, the 4th pressure sensor and the 4th pressure regulator panel that the second vertical dimension, which presses component, 4th pressure adjusts stud and the 4th pressure sensor is vertically arranged, and the 4th pressure regulator panel is horizontally disposed in left-right direction, 4th pressure adjusts the middle part that stud passes perpendicularly through the epipleural of c-type supporting plate, and the 4th pressure adjusts stud and is threaded in c-type branch On the epipleural of plate, the lower end that the 4th pressure adjusts stud is rotatably installed in the upper end of the 4th pressure sensor, and the 4th pressure passes The lower end of sensor is fixedly connected on the upper surface middle part of the 4th pressure regulator panel, the second lateral supporting plate, left risers, right risers, two Block third pressure regulator panel and the 4th pressure regulator panel surround dimension pressure case, and the right side of right risers is equipped with to be connected with the groove on right side Pressure gauge is tested in logical imbibition.
8. the test method of coal sample computing permeability simulation test device as described in claim 7, it is characterised in that: including Following steps:
(1), it heats and air-dries coal sample block, so that coal sample block is generated crack: the coal sample block made is placed on two rows of adding thermal resistance sticks Between testing stand upper surface, coal sample block is made of lignite, and each adding thermal resistance stick is powered and is heated to coal sample block, is opened simultaneously Three the first blower motors, three the first blower motor blow airs are moved, the air advertised is heated into through each adding thermal resistance stick Hot-air, coal sample block air-dry under hot air acting, and crack is generated inside coal sample block；
(2), the coal sample block after air-drying repeatedly is sliced, and the coal piece cut is pushed into the position of dimension pressure-break test module It sets, dimension pressure-break test is carried out to every lump coal piece, then the crack imaging of every lump coal piece is subjected to three-dimensional splicing and is realized to coal sample block Whole internal fissure imaging；
(3), step (1) is repeated, then the coal sample block after air-drying is placed in dimension pressure case, the second air blower of starting carries out dimension pressure and seeps Test thoroughly.
9. the test method of coal sample computing permeability simulation test device according to claim 8, it is characterised in that: step Suddenly (2) specifically: after coal sample block air-dries, close each adding thermal resistance stick and the first blower motor, while starting two first and hanging down Straight-in feed motor and two wire motors, the line shaft of the first vertical feed motor rotate forward and the second lead screw are driven to rotate, and second The second sliding block of lead screw transmission is moved down along the second guiding slide bar, and the second sliding block drives each support rod to move down, support rod Two wire motors are driven to move down, two wire motors drive wire cutting copper wire to move down by L-type strut, and two are walked The line shaft of silk motor rotates synchronously, so that two driving rollers rotate synchronously, two driving rollers drive wire cutting copper wire to turn It is dynamic, in this way, wire cutting copper wire is downwards once sliced coal sample block, after completing primary slice, two wire motors are closed, together When make two the first vertical feed motor reversals, to make the second sliding block move up under the driving of the second lead screw, and then band It moves each support rod to move up, each support rod drives two wire motors to move up, and two wire motors pass through L-type branch Bar drives wire cutting copper wire to move up, then locking nut is unscrewed, and lift pressure regulator panel is made to be moved downward to testing stand Upper surface on the downside of, starting push away coal gas cylinder, the piston rod for pushing away coal gas cylinder stretches out to the right, then vertical push plate by the coal piece cut to the right It is pushed into adjust the right side of long hole, makes coal piece between laser emitter and laser pickoff, then adjust lift pressure Plate moves up on the upside of the upper surface of testing stand, tightens locking nut to which lift pressure regulator panel is fixed on adjusting On seat, so that coal piece be made to be located at the upper of first pressure adjustable plate, second pressure adjustable plate, lift pressure regulator panel and testing stand In the dimension pressure space that surface surrounds, stud is adjusted by first pressure and second pressure adjusts stud and can adjust first pressure respectively The dimension pressure pressure of adjustable plate and second pressure adjustable plate, and then the coal seam reservoirs of different height are simulated, first pressure senses when initial The dimension pressure pressure that device and second pressure sensor are shown is 0；
Laser emitter and laser pickoff be separately fixed at front side and rear side Four-slider on, in this way, laser emitter and Laser pickoff is located in two planar movement systems and synchronizing moving, when coal on piece is there are when crack, laser emitter The laser of transmitting will synchronize in the plane continuous moving by crack directive laser pickoff, two pieces of Four-sliders, from And make laser emitter and laser pickoff to the crack imaging of coal piece entirety, stud and second pressure are adjusted by first pressure Adjust the dimension pressure pressure that stud adjusts first pressure adjustable plate and second pressure adjustable plate respectively, first pressure adjustable plate and second When pressure regulator panel carries out dimension pressure to coal piece, the crack in coal piece, which is shunk, to become smaller, again by laser emitter and laser pick-off Device presses different dimensional the crack imaging after Coal Under piece overall shrinkage；
Make two the first sliding blocks are synchronous to be oriented to along the longitudinal direction at corresponding two first respectively by rotating two rotation handwheels It is slided on slide bar, and then makes two set of first lifting assembly, two wire motors, wire cutting copper wire and push away coal component and move back Dynamic, wire cutting copper wire is moved to right above coal sample block, is then sliced again, adjacent two heating electricity in each moving distance and left side Gap width between resistance stick is identical to guarantee that the thickness of every lump coal piece is identical, so completes repeatedly slice, and to every lump coal Piece carries out crack imaging, then the crack imaging of every lump coal piece is carried out three-dimensional splicing realization to the internal fissure of coal sample block entirety Imaging.
10. the test method of coal sample computing permeability simulation test device according to claim 8, it is characterised in that: Step (3) specifically: repeat step (1) and obtain air-dried coal sample block, coal sample block is put into dimension pressure case, the second air blast is started Machine, open control ball valve, the second air blower be blown into dimension pressure case in air mass flow and pressure pass through respectively air inlet flowmeter and Aspiration pressure table is measured, and air after coal sample block imbibition, tests pressure gauge by imbibition and measure the sky after imbibition in dimension pressure case Atmospheric pressure can so calculate according to the air pressure of front and back since the spatial volume in dimension pressure case is constant and acquire infiltration front and back Air quality adjusts stud and the 4th pressure tune by adjusting third pressure so that the true permeability of coal sample block be calculated Section stud obtains the variation of the true permeability of coal sample block under different dimensional pressure pressure.
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