CN207163826U - More lower coal measure strata stress distribution analogue means of phase tectonic movement effect - Google Patents
More lower coal measure strata stress distribution analogue means of phase tectonic movement effect Download PDFInfo
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- CN207163826U CN207163826U CN201720850004.8U CN201720850004U CN207163826U CN 207163826 U CN207163826 U CN 207163826U CN 201720850004 U CN201720850004 U CN 201720850004U CN 207163826 U CN207163826 U CN 207163826U
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Abstract
More lower coal measure strata stress distribution analogue means of phase tectonic movement effect, including rock stratum simulation and fixed system, tectonic kinetics simulation system, structural deformation control system, compression system and information gathering test and analysis system；If rock stratum is simulated with being provided with dried layer rock stratum in fixed system, tectonic kinetics simulation system applies longitudinal force and cross force to rock stratum, structural deformation control system is used to control the deformation of rock stratum to enable rock stratum to reach expected structural configuration, and compression system uses hydraulic system to provide power for tectonic kinetics simulation system and structural deformation control system.Coal measure strata crustal stress distribution characteristics and its evolution process under the utility model simulation two phases tectonic movement superposition, scientific basis is provided for the stress distribution prediction of different configuration position coal measure strata；The utility model can simulate more than fold neutral plane and the following different configuration position stress intensity of fold neutral plane.
Description
Technical field
The utility model belongs to coal measure gas exploitation modelling technique field, more particularly to a kind of more phase tectonic movement effects
Lower coal measure strata stress distribution analogue means.
Background technology
With the increase of coal-bed gas exploitation depth, the temperature of the exploration and development of coal measure gas is gradually increasing, but China's coal measures
After stratum is formed, more phase tectonic movement effects are experienced mostly, and more phase tectogenetic superpositions cause a small range stress distribution
Become complicated, the complexity of stress condition governs the works such as Permeability Prediction in coal measure gas exploration and development, drilling well-pressure break-mining
The accuracy and validity of journey.Therefore the Accurate Prediction of crustal stress is an important process of the exploration and development of coal measure gas.
In order to obtain the buried stress distribution feature in underground km or even deeper coal measure strata, the work of China's coal bed gas
Person has done substantial amounts of work by means such as geological prospecting, mathematics calculating.Some researchers are answered using mechanical simulation software
Power is simulated, and draws stress distribution law, in the relatively simple area of geological conditions, analog result is relatively accurate.Work as geology
When condition is more complicated, due to can not be tracked to process, its assumed condition excessively idealizes, and causes analog result and reality
Larger difference be present；Some researchers are measured using foil gauge mensuration to crustal stress, but are more the data of point, are distributed
How on earth rule and influence factor can not but provide the answer relatively determined.Some researchers are using hydraulic fracturing, well logging etc.
Method carries out the calculating of crustal stress, is more the data of " point ", and exploration and development fine degree has been largely fixed to exploitation
The degree of understanding of area's crustal stress distribution, exploitation guidance seem very passive.The same period is not secondary, different for different coal measure strata situation experience
After size tectonic movement effect, how different configuration position stress is formed under the fold building of different shape;How is influence factor;
How is the evolution Feature of stress during tectono-dynamic action;These problems all without very clear and definite answer, cause mesh so far
Preceding coal measure gas exploitation blindness is larger.Therefore, need badly and develop a kind of analogue means, different coal measure strata conditions can be simulated, and it is right
The lower stress intensity of the same period time tectonic movement effect is not monitored, to be coal measure strata tripe systems after more phase tectonic movements effect
Position Permeability Prediction is made to lay the foundation.
Utility model content
The utility model is directed to coal measure strata after being acted on through excessive phase tectonic movement, can not be to different layers position, tripe systems
Make the problem of stress distribution feature at position is accurately predicted, there is provided a kind of more lower coal measure stratas of phase tectonic movements effect should
Power distribution simulation device, the analogue means and method can not only be simulated after two phases tectonic movement superposition in coal measure strata not
Same rock stratum, the horizontal stress size at different configuration position, moreover it is possible to simulate its evolution process；Fold can be in coal measure strata
Different configuration position stress distribution and evolution Feature simulation in the case of two kinds of neutral plane above and below.Surveyed by the simulation
Examination, test basis can be provided for the tectonic stress distribution research of coal measure strata under more phase tectono-dynamic actions.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：More lower coal measures of phase tectonic movement effect
Reservoir stress distribution simulation device, including rock stratum simulation and fixed system, tectonic kinetics simulation system, structural deformation control system
System, compression system and information gathering test and analysis system；
If rock stratum is simulated with being set in fixed system and being fixed with dried layer rock stratum, it is assumed that the longitudinal direction of rock stratum is fore-and-aft direction,
It is laterally left and right directions, tectonic kinetics simulation system is arranged on around rock stratum and applies longitudinal force and cross force, structure to rock stratum
Make Deformation control system and be arranged on rock stratum simulation with the top and bottom in fixed system and for controlling the deformation of rock stratum to make rock
Layer can reach expected structural configuration, and compression system uses hydraulic system as tectonic kinetics simulation system and structural deformation control system
System provides power；Information gathering test includes transverse-stress sensing device, longitudinal stress sensor, high-definition camera with analysis system
Head, data acquisition lines and computer, transverse-stress sensing device and longitudinal stress sensor are arranged on rock stratum vertical and horizontal
Surface, high-definition camera be arranged on rock stratum simulation with fixed system in in whole loading procedure simulation rock stratum deformation change into
Row captured in real-time, high-definition camera, transverse-stress sensing device and longitudinal stress sensor pass through data acquisition lines and computer
Connection.
Rock stratum is simulated includes static housing, hold-down support and movable wedge with fixed system, and hold-down support passes through edge left and right
Horizontally arranged bearing pin is rotatably connected on rear side of fixed inside the box, and fixed square groove, fixed branch are offered on front side of hold-down support
Seat rear side is provided with the curved fixation support slot in one of section along left and right horizontal direction, fixed inside the box rear wall be provided with
The support column of fixed support slot top pressure contact；
The movable square groove with fixed square groove correspondence, fixed inside the box left side wall and right side are offered on rear side of movable wedge
Wall offers guide groove along the longitudinal direction, and movable wedge both sides are provided with the guide pillar for stretching into and being slid back and forth along guide groove, movable wedge
Front side is provided with the curved activity top pressures groove in one of section along left and right horizontal direction；
If rock stratum includes the one layer of regulation rock stratum set from top to bottom and dried layer test rock stratum, regulation rock stratum and test rock stratum
Leading section be placed in movable square groove, regulation rock stratum and test rock stratum rearward end be placed in fixed square groove.
Tectonic kinetics simulation system includes lateral dynamics simulation mechanism and Longitudinal simulation mechanism；Lateral dynamics analog machine
Structure along rock stratum fore-and-aft direction at least provided with three groups,
Every group of lateral dynamics simulation mechanism include cushion block, two pieces of left pressing plates, two pieces of right pressing plates, one piece of arm-tie, four it is pre-
Prestress steel strand and a horizontal oil cylinder, horizontal oil cylinder left side are fixed on the right side of static housing, and the piston rod of horizontal oil cylinder is right
End is fixedly connected with arm-tie left surface, and cushion block is arranged on the right side of two pieces of right pressing plates between static housing right side wall, two pieces of left pressures
Plate is arranged on the left of rock stratum and time interval is set, and two pieces of right pressing plates are arranged on the right side of rock stratum and time interval is set, front side
The left end of two prestress wires anchors with the upper and lower part of one piece of front side left pressing plate respectively, two prestress steels of front side
The right-hand member of twisted wire anchors after passing through two pieces of right pressing plates and static housing right side wall with the upper and lower part on front side of arm-tie, and the two of rear side
The left end of bar prestress wire anchors with the upper and lower part of one piece of left pressing plate of rear side respectively, two prestress steel twists of rear side
The right-hand member of line anchors after passing through cushion block and static housing right side wall with the upper and lower part on rear side of arm-tie；
Longitudinal simulation mechanism includes the longitudinal oil cylinder and drive rod for being arranged on fixed inside the box, the rear side of longitudinal oil cylinder
Static housing front inner wall is fixedly connected on, drive rod is set along left and right horizontal direction, and the piston rod rear end of longitudinal oil cylinder is with driving
It is fixedly connected in the middle part of lever, top pressure is in the activity top pressures groove on front side of movable wedge on rear side of drive rod.
Structural deformation control system includes jack after two preceding jack, six middle jack and two, thousand before two
Jin top is separately fixed at top inner wall and bottom interior wall on front side of static housing, and two preceding jack are located at the top of rock stratum respectively
It is correspondingly arranged with lower section and up and down；Three middle jack are spaced the center top inwall for being fixed on static housing in left-right direction,
Jack is spaced the central bottom inwall for being fixed on static housing in left-right direction in the other three, three middle jack on top and
Three middle jack of bottom are corresponded above and below rock stratum and up and down respectively, and jack is fixed respectively after two
Top inner wall and bottom interior wall on rear side of static housing, jack is respectively above and below rock stratum and up and down after two
It is correspondingly arranged.
Compression system includes hydraulic control device, hydraulic pump, hydraulic pressure oil tank and hydraulic divider, and the import of hydraulic pump passes through
First high-pressure oil pipe is connected with hydraulic pressure oil tank, and the outlet of hydraulic pump is connected by the import of the second high-pressure oil pipe and hydraulic divider
It is logical, three outlets are provided with hydraulic divider, the one outlet of hydraulic divider passes through the 3rd high-pressure oil pipe and longitudinal oil cylinder
Connection, second outlet of hydraulic divider are connected by the 4th high-pressure oil pipe with horizontal oil cylinder, the 3rd of hydraulic divider
Outlet is connected by the 5th high-pressure oil pipe with structural deformation control system, and the 3rd high-pressure oil pipe, the 4th high-pressure oil pipe and the 5th are high
Be provided with electronic valve and pressure gauge on pressuring oil pipe, hydraulic control device by control line respectively with hydraulic pump and all
Electronic valve connects with pressure gauge.
Using above-mentioned technical proposal, more lower coal measure strata stress distribution simulation dresses of phase tectonic movement effect of the present utility model
The analogy method put, comprises the following steps：
（1）, simulation rock stratum preparation and sensor it is embedded
Young's modulus and thickness first according to needed for the formation parameters simulated calculate each test rock stratum and regulation rock stratum
Degree, test rock stratum are primarily used to simulate the coal measure strata of three kinds of different lithologies, can also increase or decrease the number of plies as needed,
Test rock stratum is laid according to layering after different ratio mixing and formed by cement, land plaster, quartz sand, clay, water；Adjust rock stratum
It is primarily used to control the position of fold neutral plane, is equally according to different ratios by cement, land plaster, quartz sand, clay, water
Lay and formed after example mixing, its Young's modulus meets E with thickness is laid1h1 2> E2h2 2When, fold neutral plane is always positioned at adjusting
In rock stratum；E in formula1And h1Respectively adjust the Young's modulus and thickness of rock stratum, E2And h2Respectively test the average Young of rock stratum
Modulus and gross thickness；
Then made according to the size of the simulation rock stratum calculated and pour mould；With cement, land plaster, quartz sand, clay,
It is stand-by that water is configured to the compound with four kinds of heterogeneous expectations intensity according to a certain percentage；Poured first in mold bottom when pouring
Rock stratum is adjusted, rock stratum to be regulated starts to pour three layers of test rock stratum successively in sequence after somewhat solidifying, while embedded longitudinal direction should
Force snesor and transverse-stress sensing device are simultaneously drawn data acquisition lines and are connected with computer, will simulate that rock stratum is In Shade to support
Shield is to design strength and removes mould；
（2）, simulation rock stratum installation and compression system connection
Hold-down support and movable wedge are separately mounted to rear side and the front side of fixed inside the box according to design, bearing pin rotates
The left side wall and right side wall of static housing are connected to, while the support column that fixed inside the box rear wall is set supports groove top with fixed
Press contacts；The guide pillar of movable wedge both sides is stretched into and is slidably arranged in guide groove, and prefabricated rock stratum is placed into hold-down support
Fixation square groove and movable wedge movable square groove in, be mounted and connected compression system and information gathering test with analysis be
System, transverse-stress sensing device and longitudinal stress sensor are arranged in test rock stratum；Circuit, oil circuit and oil pump are debugged, ensures institute
There are oil cylinder and the equal normal work of jack；
（3）, tectonic kinetics simulation system installation
Two pieces of left pressing plates are positioned over to the left side of simulation rock stratum, two pieces of right pressing plates are positioned over to the right side of simulation rock stratum, will
Prestress wire is anchored through left pressing plate and by prestress wire and left pressing plate, and arm-tie is fixed on to the piston of horizontal oil cylinder
On bar, the right-hand member of prestress wire through arm-tie and is anchored, on the right side of two pieces of right pressing plates between static housing right side wall
Place cushion block；
（4）, horizontal predeformation is set to rock stratum
To ensure that experiment can preferably simulate required structural configuration, first pass through Deformation control jack group and carry out laterally
Deformation is default, i.e., makes hydraulic pump works by operating hydraulic control device first, two preceding jack, after two jack and
Limited simultaneously with reaching in rock stratum being loaded in the middle part of simulation rock stratum positioned at two middle middle jack on fore-and-aft direction
The purpose of vertical deviation occurs for portion, then starts in the longitudinal direction in two middle jack in left side and two of right side
Jack pair rock stratum carries out application pressure, rock stratum is formed accordion in the horizontal；
（5）, transverse structure power simulation
Open three horizontal oil cylinders simultaneously by hydraulic control device and tensioning loading is carried out to prestress wire, simultaneously will
Step（4）In all lifting jack unloading, the delta data of lateral stress is gathered while tensioning by transverse-stress sensing device,
By camera picture it was observed that fold deformation is according to step（4）Middle pre-set configuration form stops tensioning when reaching design requirement,
Carrying out anchoring on the right side of right pressing plate to prestress wire makes simulation rock stratum keep current stress and deformation state, then will laterally
Oil cylinder unloading, remove cushion block, cut unnecessary prestress wire, preserving stress variation data and video data；
（6）, longitudinal structure power simulation
Longitudinal oil cylinder is opened by hydraulic control device the simulation rock stratum for living through transverse structure power directly add
Carry, longitudinal oil cylinder is moved rearwards by drive rod driving activity wedge presses rock stratum, because hold-down support both ends pass through bearing pin turn
It is dynamic to be connected to fixed inside the box, so easily simulate rock stratum in the loading of longitudinal structure power and form fold tectonic, longitudinal direction adds
Stress and the fold deformation change of vertical and horizontal are gathered while load by longitudinal stress sensor and transverse-stress sensing device
And the deformation process of rock stratum is simulated by camera record, lasting loading preserves stress and deformation change number until rock breakdown
According to and video data；
（7）, experiment terminate after unload each device and equipment；
（8）, carry out above-mentioned step using pouring mould and pour simulation rock stratum of the regulation rock stratum between test rock stratum
Rapid simulation process；
（9）Carry out pouring simulation rock stratum progress above-mentioned step of the regulation rock stratum positioned at test rock stratum top using mould is poured
Rapid simulation process.
The utility model has following technique effect：
1st, the utility model can simulate under two phases tectonic movement superposition coal measure strata crustal stress distribution characteristics and its
Evolution process, scientific basis is provided for the stress distribution prediction of different configuration position coal measure strata；
2nd, the utility model can simulate more than fold neutral plane and the following different configuration position stress intensity of fold neutral plane.
3rd, the loading of transverse structure power employs the prestressing technique commonly used in bridge construction in the utility model, and this sets
Meter can be such that deformation of the simulation rock stratum in longitudinal loading procedure is not influenceed by horizontal oil cylinder, that is, carry out longitudinal loading procedure
In liberated horizontal oil cylinder, simulation rock stratum is more nearly real deformation.
4th, the rock stratum simulation in the utility model is mainly used in simulating real coal measure strata and country rock with fixed system；Structure
Make power simulation system and mainly simulate mechanism of the horizontal and vertical direction stress to rock stratum；Structural deformation control system master
It is used to control the deformation of rock stratum can reach expected structural configuration；Compression system is mainly hydraulic presses all in device
Hydraulic power is provided；Information gathering test is mainly that data are acquired and analyzed with analysis system.
5th, the utility model is in longitudinal structure power simulation process, and hold-down support can be with by the thrust backward of rock stratum
Line rotates centered on bearing pin, and support column plays a part of supporting hold-down support.Lead on guide pillar edge at left and right sides of identical movement wedge
Groove move, drive rod top pressure activity top pressures groove driving activity wedge promote rock stratum when, movable wedge also can centered on guide pillar line
Turn an angle, but guide pillar can move forward and backward still in guide groove.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
Fig. 2 is A-A sectional views in Fig. 1；
Fig. 3 is B-B sectional views in Fig. 1.
Embodiment
As shown in Figure 1, Figure 2 and Figure 3, the lower coal measure strata stress distribution simulation of more phase tectonic movement effects of the present utility model
Device, including rock stratum simulation and fixed system, tectonic kinetics simulation system, structural deformation control system, compression system and letter
Cease collecting test and analysis system；
If rock stratum is simulated with being set in fixed system and being fixed with dried layer rock stratum 1, it is assumed that the longitudinal direction of rock stratum 1 is front and back
To horizontal is left and right directions, and tectonic kinetics simulation system is arranged on around rock stratum 1 and applies longitudinal force and transverse direction to rock stratum 1
Power, top and bottom of the structural deformation set-up of control system in rock stratum simulation with fixed system and the change for controlling rock stratum 1
Shape enables rock stratum 1 to reach expected structural configuration, and compression system uses hydraulic system to become for tectonic kinetics simulation system and construction
Shape control system provides power；Information gathering test and analysis system include transverse-stress sensing device 2, longitudinal stress sensor 3,
High-definition camera 4, data acquisition lines 5 and computer 6, transverse-stress sensing device 2 and longitudinal stress sensor 3 are arranged on rock stratum
The surface of 1 vertical and horizontal, it is interior to simulating rock in whole loading procedure with fixed system that high-definition camera 4 is arranged on rock stratum simulation
The deformation change of layer 1 carries out captured in real-time, and high-definition camera 4, transverse-stress sensing device 2 and longitudinal stress sensor 3 pass through number
It is connected according to collection circuit 5 with computer 6.
Rock stratum is simulated includes static housing 7, hold-down support 8 and movable wedge 9 with fixed system, and hold-down support 8 passes through edge
The bearing pin 10 that left and right horizontal direction is set is rotatably connected on rear side in static housing 7, and the front side of hold-down support 8 offers fixation side
Groove, the rear side of hold-down support 8 is provided with the curved fixation support slot in one of section along left and right horizontal direction, after static housing 7 is interior
Side wall is provided with the support column 11 contacted with fixed support slot top pressure；
The movable rear side of wedge 9 offers and the movable square groove of fixed square groove correspondence, left side wall and the right side in static housing 7
Side wall offers guide groove 12 along the longitudinal direction, and the movable both sides of wedge 9 are provided with the guide pillar 13 for stretching into and being slid back and forth along guide groove 12,
The movable front side of wedge 9 is provided with the curved activity top pressures groove in one of section along left and right horizontal direction；
Rock stratum 1 includes the one layer of regulation rock stratum 14 set from top to bottom and three layers of test rock stratum 15, adjusts rock stratum 14 and surveys
The leading section of examination rock stratum 15 is placed in movable square groove, and the rearward end of regulation rock stratum 14 and test rock stratum 15 is placed on fixed square groove
It is interior.
Tectonic kinetics simulation system includes lateral dynamics simulation mechanism and Longitudinal simulation mechanism；Lateral dynamics analog machine
Structure along the fore-and-aft direction of rock stratum 1 at least provided with three groups,
Every group of lateral dynamics simulation mechanism includes 16, two pieces of cushion block, 17, two pieces of left pressing plate, 38, one pieces of arm-ties of right pressing plate
18th, four prestress wires 19 and a horizontal oil cylinder 20, the horizontal left side of oil cylinder 20 is fixed on the right side of static housing 7, horizontal
It is fixedly connected to the piston rod right-hand member of oil cylinder 20 with the left surface of arm-tie 18, cushion block 16 is arranged on two pieces of right sides of right pressing plate 38 and fixed
Between the right side wall of casing 7, two pieces of left pressing plates 17 are arranged on the left side of rock stratum 1 and time interval is set, and two pieces of right pressing plates 38 are arranged on
The right side of rock stratum 1 and time interval is set, the left ends of two prestress wires 19 of front side respectively with one piece of front side left pressing plate 17
Upper and lower part anchoring, the right-hand members of two prestress wires 19 of front side is right through two pieces of right pressing plates 38 and static housing 7
Upper and lower part after side wall with the front side of arm-tie 18 anchors, the left ends of two prestress wires 19 of rear side respectively with rear side one
The upper and lower part anchoring of block left pressing plate 17, the right-hand member of two prestress wires 19 of rear side pass through cushion block 16 and fixed case
Upper and lower part after the right side wall of body 7 with the rear side of arm-tie 18 anchors；
Longitudinal simulation mechanism includes the longitudinal oil cylinder 21 and drive rod 22 being arranged in static housing 7, longitudinal oil cylinder
21 rear side is fixedly connected on the front inner wall of static housing 7, and drive rod 22 is set along left and right horizontal direction, the work of longitudinal oil cylinder 21
Stopper rod rear end is fixedly connected with the middle part of drive rod 22, and the rear side top pressure of drive rod 22 is in the activity top pressures groove of the movable front side of wedge 9.
Structural deformation control system includes jack 25 after two preceding 23, six middle jack 24 of jack and two, and two
Individual preceding jack 23 is separately fixed at the top inner wall and bottom interior wall of the front side of static housing 7, and two preceding jack 23 distinguish position
It is correspondingly arranged above and below rock stratum 1 and up and down；Three middle jack 24 are spaced in left-right direction is fixed on static housing 7
Center top inwall, jack 24 is spaced the central bottom inwall for being fixed on static housing 7 in left-right direction in the other three, on
Three middle jack 24 in portion and three middle jack 24 of bottom are respectively above and below rock stratum 1 and upper and lower 1 a pair
Should, jack 25 is separately fixed at the top inner wall and bottom interior wall of the rear side of static housing 7 after two, and jack 25 divides after two
It Wei Yu not be correspondingly arranged above and below rock stratum 1 and up and down.
Compression system includes hydraulic control device 26, hydraulic pump 27, hydraulic pressure oil tank 28 and hydraulic divider 29, hydraulic pump 27
Import connected by the first high-pressure oil pipe 30 with hydraulic pressure oil tank 28, the outlet of hydraulic pump 27 passes through the second high-pressure oil pipe 31 and liquid
The inlet communication of current divider 29 is pressed, hydraulic divider 29 is really a high-pressure bottle, and three are provided with hydraulic divider 29
Outlet, the one outlet of hydraulic divider 29 are connected by the 3rd high-pressure oil pipe 32 with longitudinal oil cylinder 21, hydraulic divider 29
Second outlet is connected by the 4th high-pressure oil pipe 33 with horizontal oil cylinder 20, and the 3rd outlet of hydraulic divider 29 passes through the 5th
High-pressure oil pipe 34 connects with jack 25 after two preceding 23, six middle jack 24 of jack of structural deformation control system and two
Connect, electronic valve 35 and pressure gauge are provided with the 3rd high-pressure oil pipe 32, the 4th high-pressure oil pipe 33 and the 5th high-pressure oil pipe 34
36, hydraulic control device 26 is connected with hydraulic pump 27 and all electronic valves 35 and pressure gauge 36 respectively by control line 37
Connect.
The analogy method of more lower coal measure strata stress distribution analogue means of phase tectonic movement effect, comprises the following steps：
（1）, simulation rock stratum 1 preparation and sensor it is embedded：Each survey is calculated according to the parameter of rock stratum 1 simulated first
Try rock stratum 15 and adjust the Young's modulus and thickness needed for rock stratum 14, test rock stratum 15 is primarily used to simulate three kinds of different lithologies
Coal measure strata, can also increase or decrease the number of plies as needed, test rock stratum 15 by cement, land plaster, quartz sand, clay,
Water lays according to layering after different ratio mixing and formed；Regulation rock stratum 14 is primarily used to control the position of fold neutral plane,
Equally it is to lay to be formed after being mixed according to different ratios by cement, land plaster, quartz sand, clay, water, its Young's modulus and paving
Put thickness and meet E1h1 2> E2h2 2When, fold neutral plane is always positioned at adjusting in rock stratum 14；E in formula1And h1Respectively adjust rock stratum
14 Young's modulus and thickness, E2And h2Respectively test the average Young's modulus and gross thickness of rock stratum 15；
Then made according to the size of the simulation rock stratum 1 calculated and pour mould；With cement, land plaster, quartz sand, viscous
It is stand-by that soil, water are configured to the compound with four kinds of heterogeneous expectations intensity according to a certain percentage；First in mold bottom when pouring
Regulation rock stratum 14 is poured, rock stratum 14 to be regulated starts to pour three layers of test rock stratum 15 successively in sequence after somewhat solidifying, simultaneously
Bury longitudinal stress sensor 3 and transverse-stress sensing device 2 and draw data acquisition lines 5 and be connected with computer 6, rock will be simulated
The In Shade maintenance of layer 1 is to design strength and removes mould；
（2）, simulation rock stratum 1 installation and compression system connection：By hold-down support 8 and movable wedge 9 according to design point
Rear side and front side, bearing pin 10 that An Zhuan be in static housing 7 be rotatably connected on the left side wall and right side wall of static housing 7, together
When static housing 7 in rear wall set support column 11 with fixation support slot top pressure contact；The guide pillar 13 of the movable both sides of wedge 9 is stretched
Enter and be slidably arranged in guide groove 12, prefabricated rock stratum 1 is placed into the fixation square groove and movable wedge 9 of hold-down support 8
In movable square groove, compression system and information gathering test and analysis system, transverse-stress sensing device 2 and longitudinal direction is mounted and connected
Strain gauge 3 is arranged in test rock stratum 15 as shown in Figure 1, 2, 3；Circuit, oil circuit and oil pump are debugged, ensures all oil cylinders
With the equal normal work of jack；
（3）, tectonic kinetics simulation system installation：Two pieces of left pressing plates 17 are positioned over to the left side of simulation rock stratum 1, by two pieces
Right pressing plate 38 be positioned over simulation rock stratum right side, by prestress wire 19 through left pressing plate 17 and by prestress wire 19 with
Left pressing plate 17 is anchored, and arm-tie 18 is fixed on the piston rod of horizontal oil cylinder 20, and the right-hand member of prestress wire 19 is passed through and drawn
Plate 18 is simultaneously anchored, and cushion block 16 is placed between two pieces of right sides of right pressing plate 38 and the right side wall of static housing 7；
（4）, horizontal predeformation is set to rock stratum 1：To ensure that experiment can preferably simulate required structural configuration, first lead to
Cross the progress transversely deforming of Deformation control jack group to preset, i.e., make the work of hydraulic pump 27 by operating hydraulic control device 26 first
Make, jack 25 and simultaneously right positioned at two middle middle jack 24 in the longitudinal direction after two preceding 23, two, jack
The middle part of simulation rock stratum 1 is loaded to reach the purpose that vertical deviation occurs for the middle part of limitation rock stratum 1, is then started in front and back
Application pressure is carried out to rock stratum 1 positioned at two middle jack 24 in left side and two middle jack 24 on right side upwards, makes rock stratum 1
Accordion is respectively formed in the horizontal；
（5）, transverse structure power simulation：Three horizontal oil cylinders 20 are opened simultaneously by hydraulic control device 26 to prestressing force
Steel strand wires 19 carry out tensioning loading, while by step（4）In all lifting jack unloading, passed by lateral stress while tensioning
Sensor 2 gathers the delta data of lateral stress, by camera picture it was observed that fold deformation is according to step（4）Middle pre-set configuration shape
State stops tensioning when reaching design requirement, and carrying out anchoring to prestress wire 19 on the right side of right pressing plate 38 protects simulation rock stratum 1
Current stress and deformation state are held, then horizontal oil cylinder 20 is unloaded, cushion block 16 is removed, cuts unnecessary prestress wire
19, preserve stress variation data and video data；
（6）, longitudinal structure power simulation：Longitudinal oil cylinder 21 is opened to living through transverse structure by hydraulic control device 26
The simulation rock stratum 1 of power is loaded directly into, and longitudinal oil cylinder 21 is moved rearwards by the driving activity wedge 9 of drive rod 22 presses rock
Layer 1, because the both ends of hold-down support 8 are rotatably connected in static housing 7 by bearing pin 10, so easily in longitudinal structure power
Rock stratum 1 is simulated in loading and forms fold tectonic, longitudinal direction passes through longitudinal stress sensor 3 and transverse-stress sensing device while loading
The stress of 2 collection vertical and horizontal and fold deformation change and the deformation process that rock stratum 1 is simulated by camera record, persistently add
Carry until rock stratum 1 ruptures, preserve stress and deformation delta data and video data；
（7）, experiment terminate after unload each device and equipment；
（8）, carried out using pouring mould and pour simulation rock stratum 1 of the regulation rock stratum 14 between test rock stratum 15
State the simulation process of step；
（9）Carried out using pouring mould and pour regulation rock stratum 14 positioned at the simulation rock stratum 1 of the test top of rock stratum 15
The simulation process of above-mentioned steps.
Claims (5)
- The lower coal measure strata stress distribution analogue means of the tectonic movement of phase more than 1. effect, it is characterised in that：Simulated including rock stratum and solid Determine system, tectonic kinetics simulation system, structural deformation control system, compression system and information gathering test and analysis system；If rock stratum is simulated with being set in fixed system and being fixed with dried layer rock stratum, it is assumed that the longitudinal direction of rock stratum is fore-and-aft direction, laterally For left and right directions, tectonic kinetics simulation system is arranged on around rock stratum and applies longitudinal force and cross force to rock stratum, and construction becomes Shape set-up of control system is simulated with the top and bottom in fixed system in rock stratum and for controlling the deformation of rock stratum to enable rock stratum Reach expected structural configuration, compression system uses hydraulic system to be carried for tectonic kinetics simulation system and structural deformation control system For power；Information gathering test includes transverse-stress sensing device, longitudinal stress sensor, high-definition camera, number with analysis system According to circuit and computer is gathered, transverse-stress sensing device and longitudinal stress sensor are arranged on the surface of rock stratum vertical and horizontal, The deformation change that high-definition camera is arranged in rock stratum simulation and fixed system to simulation rock stratum in whole loading procedure is carried out in fact When shoot, high-definition camera, transverse-stress sensing device and longitudinal stress sensor are connected by data acquisition lines with computer.
- 2. the lower coal measure strata stress distribution analogue means of more phase tectonic movement effects according to claim 1, its feature exist In：Rock stratum is simulated includes static housing, hold-down support and movable wedge with fixed system, and hold-down support is by along left and right horizontal side It is rotatably connected on to the bearing pin of setting on rear side of fixed inside the box, fixed square groove, hold-down support rear side is offered on front side of hold-down support Left and right horizontal direction is provided with the curved fixation support slot in one of section, fixed inside the box rear wall is provided with and fixed branch Support the support column of groove top press contacts；The movable square groove with fixed square groove correspondence, fixed inside the box left side wall and right side wall edge are offered on rear side of movable wedge Fore-and-aft direction offers guide groove, and movable wedge both sides are provided with the guide pillar for stretching into and being slid back and forth along guide groove, movable wedge front side Left and right horizontal direction is provided with the curved activity top pressures groove in one of section；If rock stratum includes the one layer of regulation rock stratum set from top to bottom and dried layer test rock stratum, before adjusting rock stratum and test rock stratum End is placed in movable square groove, and the rearward end of regulation rock stratum and test rock stratum is placed in fixed square groove.
- 3. the lower coal measure strata stress distribution analogue means of more phase tectonic movement effects according to claim 2, its feature exist In：Tectonic kinetics simulation system includes lateral dynamics simulation mechanism and Longitudinal simulation mechanism；Lateral dynamics simulation mechanism edge Rock stratum fore-and-aft direction at least provided with three groups,Every group of lateral dynamics simulation mechanism includes cushion block, two pieces of left pressing plates, two pieces of right pressing plates, one piece of arm-tie, four prestressing force Steel strand wires and a horizontal oil cylinder, are fixed on the right side of static housing on the left of horizontal oil cylinder, the piston rod right-hand member of horizontal oil cylinder with Arm-tie left surface is fixedly connected, and cushion block is arranged on the right side of two pieces of right pressing plates between static housing right side wall, and two pieces of left pressing plates are set Put on the left of rock stratum and time interval is set, two pieces of right pressing plates are arranged on the right side of rock stratum and time interval is set, two of front side The left end of prestress wire anchors with the upper and lower part of one piece of front side left pressing plate respectively, two prestress wires of front side Right-hand member through being anchored with the upper and lower part on front side of arm-tie after two pieces of right pressing plates and static housing right side wall, two of rear side are pre- The left end of prestress steel strand anchors with the upper and lower part of one piece of left pressing plate of rear side respectively, two prestress wires of rear side Right-hand member anchors after passing through cushion block and static housing right side wall with the upper and lower part on rear side of arm-tie；Longitudinal simulation mechanism includes the longitudinal oil cylinder and drive rod for being arranged on fixed inside the box, and the rear side of longitudinal oil cylinder is fixed Static housing front inner wall is connected to, drive rod is set along left and right horizontal direction, the piston rod rear end and drive rod of longitudinal oil cylinder Middle part is fixedly connected, and top pressure is in the activity top pressures groove on front side of movable wedge on rear side of drive rod.
- 4. the lower coal measure strata stress distribution analogue means of more phase tectonic movement effects according to claim 2, its feature exist In：Structural deformation control system includes jack after two preceding jack, six middle jack and two, two preceding jack point The top inner wall and bottom interior wall not being fixed on front side of static housing, two preceding jack are respectively above and below rock stratum And it is correspondingly arranged up and down；Three middle jack are spaced the center top inwall for being fixed on static housing, the other three in left-right direction Middle jack is spaced the central bottom inwall for being fixed on static housing in left-right direction, three middle jack on top and bottom Three middle jack correspond above and below rock stratum and up and down respectively, and jack is separately fixed at fixation after two Top inner wall and bottom interior wall on rear side of casing, jack is corresponded to above and below rock stratum and up and down and set respectively after two Put.
- 5. the lower coal measure strata stress distribution analogue means of more phase tectonic movement effects according to claim 3, its feature exist In：Compression system includes hydraulic control device, hydraulic pump, hydraulic pressure oil tank and hydraulic divider, and the import of hydraulic pump passes through first High-pressure oil pipe connects with hydraulic pressure oil tank, and the outlet of hydraulic pump passes through the second high-pressure oil pipe and the inlet communication of hydraulic divider, liquid Three outlets are provided with pressure current divider, the one outlet of hydraulic divider is connected by the 3rd high-pressure oil pipe with longitudinal oil cylinder, Second outlet of hydraulic divider is connected by the 4th high-pressure oil pipe with horizontal oil cylinder, and the 3rd outlet of hydraulic divider is logical Cross the 5th high-pressure oil pipe to be connected with structural deformation control system, the 3rd high-pressure oil pipe, the 4th high-pressure oil pipe and the 5th high-pressure oil pipe On be provided with electronic valve and pressure gauge, hydraulic control device by control line respectively with hydraulic pump and all electronic valves Door connects with pressure gauge.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502754A (en) * | 2020-06-02 | 2020-08-07 | 西山煤电(集团)有限责任公司钻探分公司 | Simulation test device for coal face gas migration enrichment zone |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111502754A (en) * | 2020-06-02 | 2020-08-07 | 西山煤电(集团)有限责任公司钻探分公司 | Simulation test device for coal face gas migration enrichment zone |
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