CN206129268U - Powder change monitoring device of mining is arranged in effect of simulation coal layer fracture - Google Patents
Powder change monitoring device of mining is arranged in effect of simulation coal layer fracture Download PDFInfo
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- CN206129268U CN206129268U CN201621119787.4U CN201621119787U CN206129268U CN 206129268 U CN206129268 U CN 206129268U CN 201621119787 U CN201621119787 U CN 201621119787U CN 206129268 U CN206129268 U CN 206129268U
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Abstract
Powder change monitoring device of mining is arranged in effect of simulation coal layer fracture is including fracturing confined pressure driving system, gas injection system, fracturing test system and computer, the end of giving vent to anger of gas injection system is connected with the inlet end of fracturing test system, the computer is connected with fracturing confined pressure driving system, gas injection system and fracturing test system through the data line respectively. The closestool for the aged is advantageous in that, design is reasonable, pour into leading liquid into to the fracturing pipe in proper order through fracturing confined pressure driving system, the load fluid, the displacing liquid, high -pressure gas and regulation high -pressure gas's injection rate is injected into to annular centre gripping ware through gas injection system and confined pressure device, connect fracturing confined pressure driving system through control your computer, the gas injection system, the confined pressure device, monitoring devices, annular centre gripping ware and fracturing pipe, different coal seam property parameter monitor, different stratum stress parameters, the buggy output of output under coal layer fracture and the effect of simulation fracturing under the different particle diameter conditions.
Description
Technical field
This utility model belongs to technical field of mine safety, and in particular to one kind simulation coal bed fracturing effect mining coal dust becomes
Change monitoring device.
Background technology
In order to develop the coal bed gas resource of China's abundant, China coal bed gas worker opens in the national coal bed gas such as reference U.S.
On the basis of sending out successful experience, put into practice through coal bed gas fundamental research and the exploration and development in more than 30 years, having gradually formed " has
Sharp block preferably-drilling well-pressure break-water pumping gas production " CBM exploration and development basis thinking, China in the case where this basic thought is instructed
Ground coal bed gas year, gas production was by 100,000,000 m of 20063Increase to 44.25 hundred million m of 20153, coal bed gas year, gas production was with annual
20%～30% speed increase.While methane output rapidly increases, cbm development depth is by 400 original～600m
Based on based on 700～1000m up till now.With the increase of cbm development depth, coal seam pressure is dramatically increased, coal
Deformation extent increases, and coal dust quantum of output substantially increases when causing coal bed gas well mining.Mining initial stage, the main task of coal bed gas well
It is drainage and step-down, coal dust may go out with Aquatic product in this crack in stage.On the one hand coal dust output may make cracks in coal seam width
Increase；On the other hand the support of coal dust has been lacked, the enabling capabilities in crack decline, and Fracture Width is likely to reduced.In dual function
Under, deformation extent difference causes bleeding stage coal dust quantum of output to become complicated with permeability relation.Into aerogenesis stage, free gas
Pressure and momentum effect may make the further output of the coal dust in coal seam, the size of coal reservoir fracture system both with coal dust quantum of output
It is relevant, while and it is relevant with gas desorption, effective stress, permeability is more complicated with coal dust output magnitude relation.It is determined that producing water rank
Section and aerogenesis stage coal dust quantum of output and the relation of permeability, can lay the foundation, so as to more for rational mining working system
Be conducive to the aerogenesis of coal bed gas well.
In order to find out coal bed gas well difference mining stage coal dust quantum of output and pressure reduction, the water yield, the relation of tolerance, China coal seam
Gas worker once by fracture simulation equipment, laid different proppant and coal dust, test under different pressure reduction and flow coal dust,
The quantum of output of proppant, and founding mathematical models draw coal dust output critical condition.The method greatest drawback is to simulate
Coal seam attribute conditions itself and residing wall rock condition, cause analog result and physical presence larger difference.Some researcheres are adopted
Three axle clamp holders arrange different confined pressures and axle pressure, ambient stress suffered by simulation coal seam reservoirs；Drill through coal column by different pressure reduction come
Test coal dust quantum of output.But coal bed gas well before mining will after reservoir reconstruction, transformation coal sample mechanical property and initial condition
Under differ greatly, this method of testing causes larger with actual deviation, it is impossible to real effectively guide field mining.Therefore need badly
A kind of equipment, can simulate coal body situation after pressure break effect, and stress state suffered by coal seam, test different mining stages can be simulated again
Coal dust quantum of output, the more scientific formulation for effectively instructing coal bed gas well mining system.
Utility model content
For the defect that prior art is present, this utility model provides coal dust output after a kind of simulation coal bed fracturing effect
Amount and permeability variation monitoring system and its experimental technique, can carry out different coal property parameters, Different Strata stress parameters, no
Simulate with coal bed fracturing under the conditions of particle diameter, to greatest extent the coal dust of the lower output of simulation pressure break effect is discharged into experimental provision, and
Accurately tested and analyzed, while testing coal sample permeability before and after pressure break effect, provided for fracturing parameter optimization and borrow
Mirror.
To solve above-mentioned technical problem, the technical scheme that this utility model is adopted is as follows：Simulation coal bed fracturing effect row
Coal mining powder change monitoring device, including pressure break confined pressure dynamical system, gas injection system, pressure break test system and computer；Gas injection system
The outlet side of system is connected with the inlet end of pressure break test system；Computer respectively by data wire and pressure break confined pressure dynamical system,
Gas injection system and pressure break test system connect；
Pressure break confined pressure dynamical system includes fracturing fluid injection device and confined pressure charger, and fracturing fluid injection device goes out liquid
End is connected by pressure break pipe with the liquid feeding end of pressure break test system；Fracturing fluid injection device include the first hub, constant-flux pump, the
One piezometer and several fracturing fluid storage cylinders, all of fracturing fluid storage cylinder is respectively by the first pipeline and the feed liquor of pressure break pipe
Mouthful connection, be provided with automatic stirrer in one of fracturing fluid storage cylinder, per the pipeline of root first on be equipped with autocontrol valve, put down
Stream pump and first pressure meter are successively set on pressure break pipe, constant-flux pump, automatic stirrer and all of autocontrol valve difference
It is connected with the first hub by data wire；Confined pressure charger includes confined pressure pump, the second hub and motor, and confined pressure pump includes
The pump housing, piston and screw rod composition, pump housing profile is that cylindrical shape and the pump housing are vertically arranged, and the shell of the pump housing is double-decker, the pump housing
Inwall is provided with gathering sill along its axial direction, and the outer rim of piston is provided with guide pad, and piston is plugged in gathering sill by guide pad
It is slidably connected with pump housing inwall, piston outer rim is connected with the inner wall sealing of the pump housing, the bottom surface of piston is coaxial to be provided with sleeve pipe, sleeve pipe
Inwall is provided with female thread, and screw coaxial line is plugged in the pump housing, and the upper end of screw rod is located in sleeve pipe and is connected with casing threads,
The lower end of screw rod extend into after the inside the shell of the pump housing and is fixedly connected with driven pulley, and the main shaft of motor is connected with vertically downward actively
Wheel, drivewheel is connected by belt with driven pulley, and along the axial direction spacing side by side of the pump housing some groups of laser length meters are provided with；Pump
Body top is connected by second pipe with pressure break test system, and second pipe is provided with second pressure meter；Motor, first pressure
Meter, second pressure meter and all of laser length meter are connected respectively by data wire with the second hub；First hub and
Second hub is connected respectively by data wire with computer.
Gas injection system includes gas cylinder, and gas cylinder is connected with pipeline manifold by air injection pipe, along gas flowing side in air injection pipe
To being sequentially provided with air compressor, gas boosting pump, supercharger, air relief valve, the 3rd piezometer and relief valve；Pipeline manifold
Gas outlet is connected with the air inlet of pressure break test system.
Pressure break test system includes clamper, base and fracturing control device, and clamper includes sleeve and rock sample cutting ferrule, set
Cylinder is penetrating columnar structured in left and right, and sleeve is fixed on base by support along left and right horizontal direction, outside rock sample cutting ferrule
Shape is cylindrical shape, and rock sample cutting ferrule is located in sleeve and is coaxially set with sleeve, and the length of rock sample cutting ferrule is less than the length of sleeve,
One section of adjustable pipe is arranged with outside pressure break pipe, fixing pipe is arranged with outside adjustable pipe, the length of adjustable pipe is more than the length of fixing pipe, Gu
Fixed tube is coaxially set with sleeve and fixing pipe is located in rock sample cutting ferrule；An at least row is in axial direction offered in fixing pipe
First through hole, often ranked first through hole equi-spaced apart arrangement, and connection corresponding with first through hole is in axial direction offered in adjustable pipe
The second through hole, in axial direction offer the pressure break hole of connection corresponding with the second through hole on pressure break pipe, all of pressure break hole,
Two through holes and first through hole are respectively positioned in rock sample cutting ferrule；Rock sample filling is formed between rock sample cutting ferrule inwall and fixed pipe outer wall
Chamber, the left part of fixing pipe is from left to right arranged with successively left inside ring, support ring and rock core cushion block, and rock core cushion block is used to block rock
The left end of scale set and positioned at the inside of rock sample cutting ferrule, left inside ring is located at the left end of sleeve, and between left inside ring and sleeve a left side is provided with
Outer shroud, the inner ring of left outside ring and outer ring are connected respectively with the outer ring of left inside ring and the inner thread of sleeve, support ring respectively with a left side
Internal ring and rock core cushion block top pressure coordinate；The right part of fixing pipe is from left to right arranged with successively sieve-like cushion block and right internal ring, sieve-like
Cushion block is used to block the right-hand member of rock sample cutting ferrule and positioned at the inside of rock sample cutting ferrule, and right internal ring is located at the right-hand member of sleeve, right internal ring with
Right outer shroud is provided between sleeve, the inner ring of right outer shroud and outer ring are connected respectively with the outer ring of right internal ring and the inner thread of sleeve；
Confined pressure chamber is formed between rock sample cutting ferrule outer wall and sleeve lining, pump housing top is by second pipe and confined pressure chamber；
The left side of rock core cushion block at least offers an injecting hole, at least one right-hand member is offered in rock core cushion block open
Cannelure, injecting hole connects with cannelure；The gas outlet of pipeline manifold is by the gas injection on the 3rd pipeline and rock core cushion block
Hole connects；The 4th pipeline is equipped with right internal ring, the 4th piezometer, flow are sequentially provided with along liquid flow direction on the 4th pipeline
Meter and the first back-pressure valve, base is provided with pulverized coal collecting bottle and fracturing fluid receiving flask, and fracturing fluid receiving flask is located at the 4th pipeline
Immediately below liquid outlet；The second back-pressure valve is provided with the liquid outlet of pressure break pipe；
Fracturing control device is used to drive adjustable pipe to move, the first back-pressure valve, the second back-pressure valve, the 4th piezometer and flow
Meter is connected respectively by data wire with computer.
Fracturing control device includes two groups of pressure break drive mechanisms for being symmetricly set on sleeve left end and right-hand member, positioned at left side
Pressure break drive mechanism includes the turning rolls being fixed on base, and the upper end of turning rolls is rotatably connected to two rollers, two rollers
The upper side and lower side of adjustable pipe is symmetrically positioned in, two rollers are contacted with adjustable pipe engagement, on the central shaft of one of roller
It is connected with driving handle；The outer circumference surface of all rollers is equipped with anti-slip veins.
Rock sample cutting ferrule includes the columnar pipeline formed by four pieces of curved wallboards in section, two pieces of adjacent walls
Guiding connection framework is provided between plate, connection framework opposite sides is oriented to and is respectively provided with the pilot hole for wearing wallboard.
Sleeve right-hand member is provided with the block cover for covering pulverized coal collecting bottle.
Using above-mentioned technical proposal, this utility model has the advantages that：This utility model is dynamic by pressure break confined pressure
Force system can fully simulate different hydraulic pressure, the sand when hydraulic fracturing condition such as discharge capacity；By controlling confined pressure pump, difference can be set
Strata pressure, realizes the simulation to coal bed gas well field hydraulic pressure break situation；Pressure, gas that gas injection system is used in regulator control system
Body flow, keeps gas flow in coal sample to stablize, at the same after for removing coal sample pressure break output coal dust；Pressure break test system
Moving back and forth by adjustable pipe, it is ensured that the unlatching in pressure break hole and closure, computer is to pressure transducer, effusion meter in system
It is acquired Deng equipment record, and feeds data back to control device, carry out corresponding parameter regulation and control, by the data pair for recording
Permeability is calculated；Rock sample cutting ferrule includes the columnar pipeline formed by four pieces of curved wallboards in section, two pieces
Guiding connection framework is provided between adjacent wallboard；So special design can be the radial direction of rock sample cutting ferrule can be expanded or receive
Contracting, it is ensured that coal sample uniform force, also ensures that the integrity of coal sample；Sleeve right-hand member is provided with for covering pulverized coal collecting bottle
Block cover, block cover is used to place when coal dust is discharged to fall outside pulverized coal collecting bottle.
In sum, this utility model is reasonable in design, injects preposition to pressure break pipe successively by pressure break confined pressure dynamical system
Liquid, load fluid, displacement fluid, inject gases at high pressure and adjust high pressure gas by gas injection system and confining pressure device to annular holder
The injection rate of body, by controlling computer pressure break confined pressure dynamical system, gas injection system, confining pressure device, monitoring device, marmon clamp are connected
Holder and pressure break pipe, coal bed fracturing and mould under the conditions of monitoring different coal property parameters, Different Strata stress parameters, different-grain diameter
Intend the coal dust output of the lower output of pressure break effect.
Description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is the structural representation of pressure break confined pressure dynamical system in this utility model；
Fig. 3 is the structural representation of gas injection system in this utility model；
Fig. 4 is the structural representation of clamper in this utility model；
Fig. 5 is the enlarged drawing in Fig. 4 at A；
Fig. 6 is the enlarged drawing in Fig. 4 at B；
Fig. 7 is the left side view of rock core cushion block；
Fig. 8 is the section view of rock core cushion block；
Fig. 9 is the left side view of sieve-like cushion block；
Figure 10 is the structural representation of rock sample cutting ferrule；
Figure 11 is the schematic diagram of adjacent two pieces of wallboard junctions on rock sample cutting ferrule.
Specific embodiment
Specific embodiment of the present utility model is described in further detail below in conjunction with the accompanying drawings：
As shown in figs. 1-11, coal bed fracturing effect mining coal dust change monitoring device, including pressure break confined pressure dynamical system are simulated
System I, gas injection system II, pressure break test system III and computer IV；The outlet side of gas injection system II and pressure break test system III
Inlet end connects；Computer IV is respectively by data wire and pressure break confined pressure dynamical system I, gas injection system II and pressure break test system
III connection；
Pressure break confined pressure dynamical system I includes fracturing fluid injection device and confined pressure charger, and fracturing fluid injection device goes out
Liquid end is connected by pressure break pipe 1 with the liquid feeding end of pressure break test system III；Fracturing fluid injection device includes the first hub 2, puts down
Stream pump 3, first pressure meter 4 and several fracturing fluid storage cylinders 5, all of fracturing fluid storage cylinder 5 respectively by the first pipeline 6 with
The inlet connection of pressure break pipe 1, being provided with one of fracturing fluid storage cylinder 5 can in automatic stirrer 7, fracturing fluid storage cylinder 5
To place fracturing fluid and sand liquid mixed liquor respectively, 7 pairs of fracturing fluid storage cylinders 5 equipped with sand liquid of automatic stirrer are stirred, protect
Card sand liquid is uniform, it is to avoid causes sand than uneven because sand liquid is uneven, affects pressure break；It is equipped with per the first pipeline of root 6 automatically
Control valve 8, constant-flux pump 3 and first pressure meter 4 are successively set on pressure break pipe 1, constant-flux pump 3, automatic stirrer 7 and all of
Autocontrol valve 8 is connected respectively by data wire with the first hub 2；Confined pressure charger includes confined pressure pump 9, the second hub
10 and motor 15, confined pressure pump 9 is constituted including the pump housing 11, piston 12 and screw rod 13, and the profile of the pump housing 11 is that cylindrical shape and the pump housing 11 hang down
Straight to arrange, the shell of the pump housing 11 is double-decker, and the inwall of the pump housing 11 is provided with gathering sill along its axial direction, and the outer rim of piston 12 sets
There is guide pad, piston 12 is plugged in gathering sill by guide pad and is slidably connected with the pump housing 11, the outer rim of piston 12 and the pump housing 11
Inner wall sealing connects, and the bottom surface of piston 12 is coaxial to be provided with sleeve pipe 64, and the inwall of sleeve pipe 64 is provided with female thread, and the coaxial line of screw rod 13 is inserted
It is located in the pump housing 11, the upper end of screw rod 13 is located in sleeve pipe 64 and is threadedly coupled with sleeve pipe 64, and the lower end of screw rod 13 extend into
Driven pulley 14 is fixedly connected with after the inside the shell of the pump housing 11, the main shaft of motor 15 is connected with vertically downward drivewheel 16, drivewheel
16 are connected by belt with driven pulley 14, and along the axial direction spacing side by side of the pump housing 11 some groups of laser length meters 17 are provided with；Pump
The top of body 11 is connected by second pipe 18 with pressure break test system III, and second pipe 18 is provided with second pressure meter 19；Motor
15th, first pressure meter 4, second pressure meter 19 and all of laser length meter 17 are respectively by data wire and the second hub 10
Connection, the first hub 2 and the second hub 10 are connected respectively by data wire with computer IV.
Gas injection system II includes gas cylinder 20, and gas cylinder 20 is connected with pipeline manifold 22 by air injection pipe 21, in air injection pipe 21
Air compressor 23, gas boosting pump 24, supercharger 25, air relief valve 26, the 3rd piezometer are sequentially provided with along gas flow direction
27 and relief valve 28；The gas outlet of pipeline manifold 22 is connected with the air inlet of pressure break test system III.
Pressure break test system III includes clamper 29, base 30 and fracturing control device, and clamper 29 includes the He of sleeve 31
Rock sample cutting ferrule 32, sleeve 31 is penetrating columnar structured, the fixation along left and right horizontal direction by support 61 of sleeve 31 in left and right
On base 30, the profile of rock sample cutting ferrule 32 is cylindrical shape, and rock sample cutting ferrule 32 is located in sleeve 31 and is coaxially set with sleeve 31,
The length of rock sample cutting ferrule 32 is arranged with outside one section of adjustable pipe 33, adjustable pipe 33 outside pressure break pipe 1 and is arranged with less than the length of sleeve 31
Fixing pipe 34, the length of adjustable pipe 33 is more than the length of fixing pipe 34, and fixing pipe 34 is coaxially set and fixing pipe in sleeve 31
34 are located in rock sample cutting ferrule 32；At least one is in axial direction offered in fixing pipe 34 and ranked first through hole 35, often be ranked first logical
The equi-spaced apart arrangement of hole 35, in axial direction offers the second through hole 36 of connection corresponding with first through hole 35 in adjustable pipe 33,
The pressure break hole 37 with the corresponding connection of the second through hole 36 is in axial direction offered on pressure break pipe 1, all of pressure break hole 37, second leads to
Hole 36 and first through hole 35 are respectively positioned in rock sample cutting ferrule 32；Rock sample is formed between the inwall of rock sample cutting ferrule 32 and the outer wall of fixing pipe 34
Filled cavity 38, the left part of fixing pipe 34 is from left to right arranged with successively left inside ring 39, support ring 40 and rock core cushion block 41, rock core
Cushion block 41 is used to block the left end of rock sample cutting ferrule 32 and positioned at the inside of rock sample cutting ferrule 32, and left inside ring 39 is located at a left side for sleeve 31
End, is provided with left outside ring 42 between left inside ring 39 and sleeve 31, left outside ring 42 is threadedly coupled respectively with left inside ring 39 and sleeve 31,
Pushing out ring 40 coordinates respectively with left inside ring 39 and the top pressure of rock core cushion block 41；The right part of fixing pipe 34 is from left to right arranged with successively sieve
Shape cushion block 43 and right internal ring 44, sieve-like cushion block 43 is used to block the right-hand member of rock sample cutting ferrule 32 and positioned at the inside of rock sample cutting ferrule 32,
Right internal ring 44 is located at the right-hand member of sleeve 31, is provided with right outer shroud 45 between right internal ring 44 and sleeve 31, right outer shroud 45 respectively with the right side in
Ring 44 and sleeve 31 are threadedly coupled；Confined pressure chamber 46, the top of the pump housing 11 are formed between the outer wall of rock sample cutting ferrule 32 and the inwall of sleeve 31
Connected with confined pressure chamber 46 by second pipe 18；
The left side of rock core cushion block 41 at least offers an injecting hole 47, offers at least one in rock core cushion block 41 right
The open cannelure 48 in end, injecting hole 47 is connected with cannelure 48；The gas outlet of pipeline manifold 22 by the 3rd pipeline 49 with
Injecting hole 47 on rock core cushion block 41 connects；The 4th pipeline 50 is equipped with right internal ring 44, is flowed along liquid on the 4th pipeline 50
Direction is sequentially provided with the 4th piezometer 51, the back-pressure valve 53 of effusion meter 52 and first, and base 30 is provided with pulverized coal collecting bottle 65 and pressure
Liquid receiving flask 54 is split, fracturing fluid receiving flask 54 is located at immediately below the liquid outlet of the 4th pipeline 50；It is provided with the liquid outlet of pressure break pipe 1
Second back-pressure valve 55；
Fracturing control device is used to drive adjustable pipe 33 to move, the first back-pressure valve 53, the second back-pressure valve 55, the 4th piezometer
51 and effusion meter 52 be connected with computer IV by data wire respectively.
Fracturing control device includes two groups of pressure break drive mechanisms for being symmetricly set on the left end of sleeve 33 and right-hand member, positioned at left side
Pressure break drive mechanism include being fixed on turning rolls 56 on base 30, the upper end of turning rolls 56 is rotatably connected to two rollers
57, two rollers 57 are symmetrically positioned in the upper side and lower side of adjustable pipe 33, and two rollers 57 are contacted with the engagement of adjustable pipe 33, wherein
Driving handle 58 is connected with the central shaft of one roller 57, the outer circumference surface of all of roller 57 is equipped with anti-slip veins.
Rock sample cutting ferrule 32 includes the columnar pipeline formed by four pieces of curved wallboards 59 in section, and two pieces adjacent
Wallboard 59 between be provided with guiding connection framework 60, be oriented to the opposite sides of connection framework 60 and be respectively provided with and wear leading for wallboard
To hole 62.
The right-hand member of sleeve 31 is provided with the block cover 63 for covering pulverized coal collecting bottle 65.
The experimental technique carried out using simulation coal bed fracturing effect mining coal dust change monitoring device, is comprised the following steps：
（1）, coal sample make；The coal sample of block according to needed for requirement of experiment is chosen, crushes coal sample, screens the coal of different-grain diameter
Powder, according to the coal dust of different-grain diameter carry out it is cementing after be pressed into columnar coal sample, after guaranteeing molding in compacting in coal sample
Footpath is identical with the external diameter of fixing pipe 34；
（2）, coal sample mechanical property test；The different coal sample of the particle diameter of making is chosen some carries out mechanical property test；
（3）, assembling experimental provision and air-leakage test；Connect all of experimental provision and pipeline, while checking clamping
Device 29 connects the air-tightness of situation and experimental provision；
（4）, experiment packet and test；Coal sample to making carries out packet numbering, and then coal sample is fitted in clamper 29
Carry out fracturing experiments, after pressure break terminates, collect the coal dust of output, and carry out drying and processing, particle diameter afterwards to coal dust, quality with
And mineral content test, the effect output coal dust constituent of analysis pressure break and coal dust occurrence characteristics, while passing through before and after pressure break
Test pressure changes and gas changes in flow rate, and to the sample permeability before and after pressure break and before and after coal dust discharge test analysis are carried out；
（5）, comprehensive study；Fracturing technology parameter and Binding experiment packet are set by computer IV, different pressures are tested out
Split coal dust quantum of output in the case of technological parameter, output particle diameter and coal dust Minerals content, and Binding experiment test coal sample pressure break
In front and back permeability variation feature, analyzes coal sample output coal dust rule under coal dust output reason and different regions different-grain diameter.
Step（4）Middle coal sample is fitted in clamper 29 carries out concretely comprising the following steps for pressure break test：
a）, back out right internal ring 44 and right outer shroud 45, remove sieve-like cushion block 43, then coal sample is loaded the rock of rock sample cutting ferrule 32
In sample filled cavity 38, then fit on sieve-like cushion block 43 is finally again threaded in right internal ring 44 and right outer shroud 45 initially
Position；
b）, to coal sample apply enclose to pressure；Confined pressure value is set on computer IV, then motor is manipulated by computer IV
15 start, and motor 15 drives drivewheel 16 to rotate, and drivewheel 16 drives driven pulley 14 to rotate, so as to screw rod 13 is rotated, screw rod 13
Piston 12 is promoted to move up, the water in the pump housing 11 is pressed into confined pressure chamber 46 by piston 12 by second pipe 18, when the second pressure
When power meter 19 monitors that pressure value reaches the confined pressure value of setting, motor 15 stops starting；
c）, by manipulating computer IV open all of autocontrol valve 8, constant-flux pump 3 starts, and constant-flux pump 3 is by fracturing fluid
In fracturing fluid press-in pressure break pipe 1 in storage cylinder 5, the pressure in pressure break pipe 1 is monitored by first pressure meter 4, it is ensured that fracturing fluid
Pressure it is identical with confined pressure；
d）, by control computer IV open air compressor 23, gas boosting pump 24, supercharger 25, the and of air relief valve 26
Relief valve 28, the high pressure gas in gas cylinder 20 in the coal sample in rock sample cutting ferrule 32, are led to by the pipeline 49 of air injection pipe 21 and the 3rd
Keep the stable and gas pressure of gas flow stable during entering high pressure gas；
e）, in gas injection process, the 3rd piezometer 27, the 4th piezometer 51 and effusion meter 52 to gas pressure in system,
Flow is recorded and is fed back to computer IV, carries out coal sample permeability test before pressure break, after permeability test terminates, gas injection system
System II is closed；
f）, carry out pressure break loading；Driving handle 58 is rotated, driving handle 58 drives roller 57 to rotate, roller 57 is pulled lives
Dynamic pipe 33 is moved, and final pressure break hole 37, first through hole 35 are connected with the alignment of the second through hole 36, and fracturing fluid is by pressure break hole 37, first
35 and second through hole of through hole 36 injects coal sample, improves the power of constant-flux pump 3 and increases the pressure of fracturing fluid, proceeds by coal sample
Pressure break, after pressure break terminates, driving handle 58 is rotated manually, make the second through hole 36 stagger with pressure break hole 37；Then gas injection is opened
System II starts the gas injection in coal sample, opens the second back-pressure valve 55, and the fracturing fluid remained in coal sample is passed through sieve-like pad by high pressure gas
The pipeline 50 of block 43 and the 4th is discharged to fracturing fluid receiving flask 54；
g）, remove right internal ring 44, then increase gas injection pressure, the coal dust in coal sample is expelled to into coal by sieve-like cushion block 43
Powder receiving flask 65, then tests the coal dust in pulverized coal collecting bottle 65, after the coal dust in rock sample cutting ferrule 32 is discharged to be finished,
Gas injection system II is closed, again loads onto right internal ring 44, gas injection system II is opened, by the 4th piezometer 51, the and of effusion meter 52
First back-pressure valve 53 carries out permeability test to the coal sample after coal dust discharge, and records result, draws coal sample permeability after pressure break.
Claims (6)
1. coal bed fracturing effect mining coal dust change monitoring device is simulated, it is characterised in that：Including pressure break confined pressure dynamical system, note
Gas system, pressure break test system and computer；The outlet side of gas injection system is connected with the inlet end of pressure break test system；Computer
It is connected with pressure break confined pressure dynamical system, gas injection system and pressure break test system by data wire respectively；
Pressure break confined pressure dynamical system includes fracturing fluid injection device and confined pressure charger, and the liquid outlet of fracturing fluid injection device leads to
Cross pressure break pipe to be connected with the liquid feeding end of pressure break test system；Fracturing fluid injection device includes the first hub, constant-flux pump, the first pressure
Power meter and several fracturing fluid storage cylinders, all of fracturing fluid storage cylinder is connected respectively by the first pipeline with the inlet of pressure break pipe
Connect, in one of fracturing fluid storage cylinder automatic stirrer be provided with, per the pipeline of root first on be equipped with autocontrol valve, constant-flux pump
It is successively set on pressure break pipe with first pressure meter, constant-flux pump, automatic stirrer and all of autocontrol valve pass through respectively
Data wire is connected with the first hub；Confined pressure charger includes confined pressure pump, the second hub and motor, and confined pressure pump includes pump
Body, piston and screw rod composition, pump housing profile is that cylindrical shape and the pump housing are vertically arranged, and the shell of the pump housing is double-decker, in the pump housing
Wall is provided with gathering sill along its axial direction, and the outer rim of piston is provided with guide pad, piston by guide pad be plugged in gathering sill with
Pump housing inwall is slidably connected, and piston outer rim is connected with the inner wall sealing of the pump housing, and the bottom surface of piston is coaxial to be provided with sleeve pipe, in sleeve pipe
Wall is provided with female thread, and screw coaxial line is plugged in the pump housing, and the upper end of screw rod is located in sleeve pipe and is connected with casing threads, spiral shell
The lower end of bar extend into after the inside the shell of the pump housing and is fixedly connected with driven pulley, and the main shaft of motor is connected with vertically downward drivewheel,
Drivewheel is connected by belt with driven pulley, and along the axial direction spacing side by side of the pump housing some groups of laser length meters are provided with；The pump housing
Top is connected by second pipe with pressure break test system, and second pipe is provided with second pressure meter；Motor, first pressure meter,
Second pressure meter and all of laser length meter are connected respectively by data wire with the second hub；First hub and second
Hub is connected respectively by data wire with computer.
2. simulation coal bed fracturing according to claim 1 acts on mining coal dust change monitoring device, it is characterised in that：Gas injection
System includes gas cylinder, and gas cylinder is connected with pipeline manifold, sky is sequentially provided with along gas flow direction in air injection pipe by air injection pipe
Air compressor, gas boosting pump, supercharger, air relief valve, the 3rd piezometer and relief valve；The gas outlet of pipeline manifold and pressure break
The air inlet connection of test system.
3. simulation coal bed fracturing according to claim 2 acts on mining coal dust change monitoring device, it is characterised in that：Pressure break
Test system includes clamper, base and fracturing control device, and clamper includes sleeve and rock sample cutting ferrule, and sleeve is that left and right is penetrating
It is columnar structured, sleeve is fixed on base by support along left and right horizontal direction, rock sample cutting ferrule profile be cylindrical shape, rock
Scale set is located in sleeve and is coaxially set with sleeve, and the length of rock sample cutting ferrule is arranged less than the length of sleeve outside pressure break pipe
There is one section of adjustable pipe, fixing pipe is arranged with outside adjustable pipe, the length of adjustable pipe is more than the length of fixing pipe, and fixing pipe is same with sleeve
Axis is arranged and fixing pipe is located in rock sample cutting ferrule；At least one is in axial direction offered in fixing pipe and ranked first through hole, often
Through hole equi-spaced apart arrangement is ranked first, the second through hole of connection corresponding with first through hole is in axial direction offered in adjustable pipe,
In axial direction offer the pressure break hole of connection corresponding with the second through hole on pressure break pipe, all of pressure break hole, the second through hole and
First through hole is respectively positioned in rock sample cutting ferrule；Rock sample filled cavity is formed between rock sample cutting ferrule inwall and fixed pipe outer wall, fixing pipe
Left part is from left to right arranged with successively left inside ring, support ring and rock core cushion block, and rock core cushion block is used to block a left side for rock sample cutting ferrule
Hold and positioned at the inside of rock sample cutting ferrule, left inside ring is located at the left end of sleeve, left outside ring, left outside ring are provided between left inside ring and sleeve
Inner ring and outer ring be connected with the outer ring of left inside ring and the inner thread of sleeve respectively, support ring respectively with left inside ring and rock core pad
Block top pressure coordinates；The right part of fixing pipe is from left to right arranged with successively sieve-like cushion block and right internal ring, and sieve-like cushion block is used to block
The right-hand member of rock sample cutting ferrule and positioned at the inside of rock sample cutting ferrule, right internal ring is located at the right-hand member of sleeve, is provided between right internal ring and sleeve
Right outer shroud, the inner ring of right outer shroud and outer ring are connected respectively with the outer ring of right internal ring and the inner thread of sleeve；Rock sample cutting ferrule outer wall
Confined pressure chamber is formed between sleeve lining, pump housing top is by second pipe and confined pressure chamber；
The left side of rock core cushion block at least offers an injecting hole, and the open ring of at least one right-hand member is offered in rock core cushion block
Shape groove, injecting hole is connected with cannelure；The gas outlet of pipeline manifold is connected by the 3rd pipeline with the injecting hole on rock core cushion block
Connect；The 4th pipeline is equipped with right internal ring, on the 4th pipeline along liquid flow direction be sequentially provided with the 4th piezometer, effusion meter and
First back-pressure valve, base is provided with pulverized coal collecting bottle and fracturing fluid receiving flask, and fracturing fluid receiving flask goes out liquid positioned at the 4th pipeline
Immediately below mouthful；The second back-pressure valve is provided with the liquid outlet of pressure break pipe；
Fracturing control device is used to drive adjustable pipe to move, the score of the first back-pressure valve, the second back-pressure valve, the 4th piezometer and flow
Not Tong Guo data wire be connected with computer.
4. simulation coal bed fracturing according to claim 3 acts on mining coal dust change monitoring device, it is characterised in that：Pressure break
Control device includes two groups of pressure break drive mechanisms for being symmetricly set on sleeve left end and right-hand member, positioned at the pressure break drive mechanism in left side
Including the turning rolls being fixed on base, the upper end of turning rolls is rotatably connected to two rollers, and two rollers are symmetrically positioned in activity
The upper side and lower side of pipe, two rollers are contacted with adjustable pipe engagement, and driving handss are connected with the central shaft of one of roller
Handle；The outer circumference surface of all rollers is equipped with anti-slip veins.
5. simulation coal bed fracturing according to claim 4 acts on mining coal dust change monitoring device, it is characterised in that：Rock sample
Cutting ferrule includes the columnar pipeline formed by four pieces of curved wallboards in section, is provided between two pieces of adjacent wallboards and leads
To connection framework, it is oriented to connection framework opposite sides and is respectively provided with the pilot hole for wearing wallboard.
6. simulation coal bed fracturing according to claim 5 acts on mining coal dust change monitoring device, it is characterised in that：Sleeve
Right-hand member is provided with the block cover for covering pulverized coal collecting bottle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621119787.4U CN206129268U (en) | 2016-10-13 | 2016-10-13 | Powder change monitoring device of mining is arranged in effect of simulation coal layer fracture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621119787.4U CN206129268U (en) | 2016-10-13 | 2016-10-13 | Powder change monitoring device of mining is arranged in effect of simulation coal layer fracture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206129268U true CN206129268U (en) | 2017-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621119787.4U Withdrawn - After Issue CN206129268U (en) | 2016-10-13 | 2016-10-13 | Powder change monitoring device of mining is arranged in effect of simulation coal layer fracture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206129268U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437694A (en) * | 2016-10-13 | 2017-02-22 | 河南理工大学 | Device for simulating coal-seam hydraulic fracturing effect to monitor discharged excavated pulverized coal change and experimental method thereof |
| CN107462473A (en) * | 2017-07-28 | 2017-12-12 | 太原理工大学 | A kind of lower coalmass crevasse evolution device and method of varying strength water effect |
| CN108316916A (en) * | 2018-01-15 | 2018-07-24 | 河南理工大学 | Mining pressure drop under different conditions of coal bed gas reservoir controls simulation experiment method |
| CN109611089A (en) * | 2019-01-08 | 2019-04-12 | 中国石油集团川庆钻探工程有限公司 | Device and method for testing damage of pulverized coal precipitation to support crack after coal bed methane well pressure |
| CN109779625A (en) * | 2019-01-25 | 2019-05-21 | 华北科技学院 | A kind of outburst prediction method and apparatus based on drilling slack coal size distribution situation |
-
2016
- 2016-10-13 CN CN201621119787.4U patent/CN206129268U/en not_active Withdrawn - After Issue
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106437694A (en) * | 2016-10-13 | 2017-02-22 | 河南理工大学 | Device for simulating coal-seam hydraulic fracturing effect to monitor discharged excavated pulverized coal change and experimental method thereof |
| CN107462473A (en) * | 2017-07-28 | 2017-12-12 | 太原理工大学 | A kind of lower coalmass crevasse evolution device and method of varying strength water effect |
| CN108316916A (en) * | 2018-01-15 | 2018-07-24 | 河南理工大学 | Mining pressure drop under different conditions of coal bed gas reservoir controls simulation experiment method |
| CN109611089A (en) * | 2019-01-08 | 2019-04-12 | 中国石油集团川庆钻探工程有限公司 | Device and method for testing damage of pulverized coal precipitation to support crack after coal bed methane well pressure |
| CN109611089B (en) * | 2019-01-08 | 2023-08-18 | 中国石油集团川庆钻探工程有限公司 | Method for testing damage of coal dust precipitation to support cracks after coal bed gas well pressure |
| CN109779625A (en) * | 2019-01-25 | 2019-05-21 | 华北科技学院 | A kind of outburst prediction method and apparatus based on drilling slack coal size distribution situation |
| CN109779625B (en) * | 2019-01-25 | 2022-09-09 | 华北科技学院 | Method and device for prominence prediction based on size distribution condition of coal dust in drill hole |
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