CN105675817B - For simulating the pilot system by mining influence coal seam bottom water bursting - Google Patents
For simulating the pilot system by mining influence coal seam bottom water bursting Download PDFInfo
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- CN105675817B CN105675817B CN201610078730.2A CN201610078730A CN105675817B CN 105675817 B CN105675817 B CN 105675817B CN 201610078730 A CN201610078730 A CN 201610078730A CN 105675817 B CN105675817 B CN 105675817B
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Abstract
For simulating the pilot system by mining influence coal seam bottom water bursting, including simulation test device, operating console and hydraulic control device, operating console is by controlling cable to be connected respectively with simulation test device and hydraulic control device, hydraulic control device is connected by water inlet pipe with simulation test device, and simulation test device includes outer framework and the testing stand being located in outer framework.The present invention sets the good testing stand of a sealing at the middle part of outer framework, sample is placed in testing stand, apply longitudinal stress and lateral stress, then excavate coal seam and collect related data, high hydraulic pressure and bottom plate variation of lithological, Water Inrush overall process are simulated, so that the related data of Water Inrush is obtained, applied in production operation, the security of coal mining activity is improved, simple to operate, good airproof performance of the invention, automaticity are high, result of the test is precisely closer to actual.
Description
Technical field
It is used to simulate by mining influence the invention belongs to Safety of Coal Mine Production gushing water experimental technique field, more particularly to one kind
The pilot system of coal seam bottom water bursting.
Background technology
Mine water inrush is always the emphasis of coalman author's concern, frequently life and property band of the water inrush accident to the people
Great loss is carried out.With the various simulation softwards such as numerical value such as FLAC-3D, Particle Flow Code, Ansys in recent years
The continuous research of means is goed deep into, and also becomes more various for the study mechanism of coal seam bottom water bursting problem, and the rock before gushing water
In terms of the seepage field of body, stress field, certain achievement is achieved.But it is due to the complexity of Water Inrush From Faults In Floor disaster, especially
It is that deep mining risk factor is more, relies solely on theoretical calculation, numerical simulation and be difficult to analysis and research, it is impossible to be disconnected for bottom plate
Layer gushing water process provides more comprehensively understanding and analysis.
For the research of coal seam bottom water bursting mechanism, domestic and foreign scholars have carried out substantial amounts of research work.20th century 40,50
Age, Hungary Wei Gefulunsi proposes the concept of " bottom plate relative water resisting layer " for the first time.In the 1960s, with coal academy of sciences
To represent, it is proposed that prediction Water Inrush whether standard be used as using water bursting coefficient.Thereafter, Shandong at beginning of the eighties science and technology
The scholar of university proposes " Down Three Zone " theory, and the theory thinks that working seam bottom plate has three like that also like mining overburden
Band, i.e.,：Coal seam floor failure, complete rock stratum band（Protection band）High band is led with artesian water.And coal academy of sciences Beijing exploitation scholar
Comprehensive exploitation effect and pressure-bearing water sport, it is proposed that original position is split discloses floor rock shifting with Zero Position Failure theory, the theory
The overall process of dynamic generation, development, formation and change.Say and think whether bottom plate is sent out in " the strong bleed-through road " that Chinese Academy of Sciences's geology is proposed
Raw gushing water, key is whether possess water inrush channel." the rock water stress relation " that Xi’an Branch of Mei Ke institutes is proposed is said and thinks bottom plate
Gushing water is rock, water and the coefficient result of stress.The vital edge that China Mining University scholar proposes is thought at coal seam bottom
Under plate Mining failure band, there is one layer of bearing capacity highest rock stratum on water-bearing layer, be referred to as " key stratum ", whether bottom plate is sent out
Raw gushing water is controlled by key stratum.
In terms of laboratory research, achieve significant progress in recent decades both at home and abroad, but analog simulation experiment is ground
Study carefully progress to relatively lag behind.Romm, Snow et al. carry out the experimental study of crack rock hydraulics in succession, and establish crack rock
Flow model in porous media, has tentatively obtained some fundamental relations between rock mass stress and seepage flow.Li Liangjie, Yang Yingtao etc. utilize similar material
Expect simulated test, simulate stope sill mechanism of water inrush.Wang Jinan have developed rubber hydraulic bag as pressure-bearing water body analogue means,
Analog simulation experiment has been carried out to Coal-mining Above Confined-water.Zhao Yixin etc. utilizes biaxial loadings analog simulation pilot system, with reference to
The experimental rig of artesian water loading is simulated based on independent spring group, has carried out pressure-bearing aquatic work under consideration crustal stress influence condition
Exploit the analog simulation experimental study of bottom plate migration rule in face.
Analog simulation experiment be using the theory of similarity, dimensional analysis as foundation experimental study method, with it is directly perceived, can solve
Certainly the insoluble various destruction problems of theory analysis, numerical simulation, mine is more suitable for compared to traditional structure model test
The model investigation of field rock mass gushing water.Former Soviet Union scholar is first using analog material three-dimensional model to gob floor rock stratum
Deformation studied；For the analog simulation experiment of gushing water, China's last century 80, the nineties just there is certain research, in
The units such as mining industry university of state, Xi'an Mei Ke institutes successively carry out the scaled physical model experiment of coal seam bottom water bursting, by without tomography
The scaled physical model experiment of structural environment lower shoe gushing water, it was demonstrated that the OX type destructive characteristics of bottom plate, and explain bottom plate and dash forward
The regularity of distribution of water spot；Simulated test is carried out further through to complete floor and containing architectonic bottom plate, shows that complete floor is broken
Bad gushing water occurs along " Zero Position Failure " line, and gushing water has substantial connection with fault properties, goaf size under the influence of tomography.Due to
Gu the complexity of-stream coupled problem, seepage simulation is not often accomplished in conventional research, only with flexible loading simulation water pressure
External force equivalence.There are various ways for the simulation of artesian water, mainly there is using rubber water bag simulation water-bearing layer or solid from stream
Coupling analog material is directly used in the experiment of artesian water conduction, and wherein pressure-bearing water bag fabrication cycle length, pressure is difficult to control and nothing
Artesian water leads the feature for assigning the local hydraulic pressure reduction of water limestone for rising and producing after method simulation coal seam floor failure；And select special similar
Simulation material is simultaneously directly simulated using water under high pressure, and the sealing and selected analog material for equipment have higher requirements.
In addition, application artesian pressure and crustal stress are relatively complicated simultaneously in analog simulation, preferable experiment is had not yet to see
System.
Coal seam bottom water bursting is big model on the key factor for having a strong impact on the exploitation of China's coal-mine resource security, high artesian body
Enclose exploitation preventing and treating Floor water turns into key problem.In recent years, being continuously increased with pit mining depth, seat earth is difficult to understand
The harm of Tao Ji limestone high artesians gradually aggravates.Therefore, numerous scholars are carried out to the disrumpent feelings rule of Mining Above Confined Aquifer bottom plate
Numerous studies, obtain many valuable conclusions.Because the problem is in terms of the complexity in terms of theoretical research and field observation
Difficulty so that effective analysis is turned into by analog simulation experimental study mining under safe waterpressure of aquifer mechanism of water inrush and the disrumpent feelings rule of bottom plate
One of means.However, how to embody the ambient stress of bottom plate, artesian water effect, artesian water in analog simulation experimental study
Pressure stability and artesian water led along the bottom plate zone of fracture rise after its corresponding pressure reduction etc. be characterized in that can experiment reflect and actually ask
The key of topic.
At present, in relevant simulation by the experiment of mining influence coal seam bottom water bursting, the control for artesian pressure is most
EDC Control System Softwares are coordinated to realize using plunger pump, voltage-stablizer.This system investments cost is high, and is when running
System is according to supplementing water pressure frequent start-stop small pump, on the one hand consumption electric energy, another aspect frequent start-stop water pump will to pump motor,
Machine envelope infringement is larger, and later maintenance is costly.On the other hand, frequent start-stop small pump can cause instantaneous pressure transient.
As can be seen here, prior art needs further improvement and developed.
The content of the invention
There is provided a kind of simple in construction, easy to operate, sealing in order to solve weak point of the prior art by the present invention
The high pilot system for simulating by mining influence coal seam bottom water bursting of good, test data precision.
In order to solve the above technical problems, the present invention is adopted the following technical scheme that：For simulating by mining influence seat earth
The pilot system of gushing water, including simulation test device, operating console and hydraulic control device, operating console is by controlling electricity
Cable is connected with simulation test device and hydraulic control device respectively, and hydraulic control device is connected by water inlet pipe and simulation test device
Connect；
Simulation test device includes outer framework and the testing stand being located in outer framework, and outer framework includes lower frame, upper ledge, left frame
With right frame, lower frame and upper ledge are horizontally disposed with, and left frame and right frame are vertically arranged, lower frame left and right ends respectively with left frame lower end and
Right frame lower end is fixedly connected, and left frame and right frame top are equipped with fixing and mounting bracket, and left frame and right frame upper end are provided with fixed plate, upper ledge
It is set in left frame and right frame, upper ledge left and right ends are provided with the portable plate being located at respectively on the left of left frame and on the right side of right frame, fixed plate
It is provided through being bolted with the regulation spiral shell fastened with portable plate in the regulating bolt of portable plate, regulating bolt between fixing and mounting bracket
Mother, the front side and rear side of left frame and right frame have vertically been evenly arranged on front side of mounting hole, upper ledge with rear side respectively by peace
Dress bolt is fixedly connected with mounting hole；Provided with longitudinal hydraulic cylinder in the middle part of upper ledge, longitudinal piston rod of longitudinal hydraulic cylinder vertically downward,
A horizontal top-pressure mechanism is equipped with the middle part of left frame and right frame, two horizontal top-pressure mechanisms are symmetrical set and structure phase
Together；Lower frame upper surface is provided with supporting plate, and support plate upper surface is provided with the guide groove opened up in left-right direction；
Testing stand includes being provided with first in the tank for being provided with open top in base, left riser and right riser, base, tank
Permeable structure is carried, base rear portion is provided with water inlet and delivery port, and the outlet of water inlet and water inlet pipe is connected, and left riser is vertically set
In chassis left side, the front side and rear lateral edge of left riser and base are provided with overall L-shaped installation step groove, installation step groove
L-type sealing gasket, high-strength transparence plate and annular slab, L-type sealing gasket, high-strength transparence plate and annular slab are sequentially provided with from inside to outside
It is fastened on by screw on base and left riser, the outline of high-strength transparence plate and annular slab is rectangular configuration, erecting bed
Corresponding offer is offered in injecting glue gap, injecting glue gap in the middle part of seal groove, L-type sealing gasket between rank groove and high-strength transparence plate
Provided with flexible rubber hose, flexible rubber hose is provided with the hole for injecting glue communicated with seal groove；Right riser left-hand face is provided with U-type groove, U-type groove and set
Have a U-shaped sealing gasket, base right side, two blocks of high-strength transparence plates the right along extend into U-type groove and with U-shaped sealing gasket joining
Touch and coordinate, the test cavity of open top, base bottom are encircled between left riser, base, right riser and two blocks of high-strength transparence plates
Portion, right riser lower end are equipped with the back-up roller wheel moved along guide groove；
First carrying permeable structure includes vertically disposed stringer board and transverse slat, offers down on stringer board and transverse slat permeable
Hole, stringer board and the equal cross-fixing of transverse slat connect to form support frame, and support frame is provided with lower porous disc, and lower porous disc is provided with upper
Water plate, upper porous disc uniformly offers permeable seam along vertical and horizontal, and lower porous disc is provided with upper permeable hole penetrating up and down.
Hydraulic control device includes the pedestal that external form is in truncated cone-shaped, provided with the second carrying permeable structure and positioned at the in pedestal
Supporting plate on two carrying permeable structures, supporting plate is provided with power gas tank and at least three liquid storages around power gas tank
Tank, each liquid storage pot bottom is connected by a section connecting tube with the second carrying permeable structure, and each fluid reservoir sidepiece is equipped with
It is connected at the top of liquid level gauge, each fluid reservoir by pneumatic tube with power gas tank, one first tune is equipped with each pneumatic tube
Valve and the feed liquor pipe joint below the first regulating valve are saved, fluid reservoir top is adjusted provided with aperture is less than the first regulating valve second
Valve is saved, power gas tank bottom is provided with safety valve, and power gas tank top is provided with the top of pressure gauge and relief valve, power gas tank provided with height
Calm the anger body charging joint；Pedestal sidepiece is provided with the water out adapter being connected with water inlet pipe, and water out adapter is provided with pressure sensor；The
The construction of one carrying permeable structure and the second carrying permeable structure is identical.
Horizontal top-pressure mechanism on right frame includes pressing plate and the installing frame, top guide bar and the lower guide rod that are located on right frame, peace
Frame up and be located at the right side of right frame, installing frame is provided with transverse hydraulic cylinder, the horizontal piston bar level of transverse hydraulic cylinder is passed through to the left
Right frame, top guide bar and lower guide rod are located above and below horizontal piston bar respectively, and top guide bar, horizontal piston bar and lower guide rod are flat
Row is set, and the left end of top guide bar and lower guide rod is extend into installing frame through right frame, and pressing plate is vertically arranged, top guide bar and lower guide rod
Left end is fixedly connected by mounting disc with pressing plate right flank, and pressing plate lower end is provided with the expansion plate of length adjustable, pressing plate and stretches
The left surface of contracting plate is contacted with the right surface of right riser by transverse hydraulic cylinder top pressure.
Left frame lower end and the junction of lower frame left end are provided with left socle, and right frame lower end and the junction of lower frame right-hand member are provided with the right side
Support, the bottom of left socle, right support and lower frame is located in same level.
Using above-mentioned technical proposal, test method of the invention, it is mainly included the following steps that：
A, all parts in testing stand are assembled, the sealing of testing stand is to coordinate high pressure injection by L-type sealing gasket
Fluid sealant is realized；The front and rear sides of above-mentioned testing stand offer seal groove, on the seal groove opened up and high-strength transparence plate
The seal groove opened up is relative, for accommodating the fluid sealant of high pressure injection.After testing stand is installed and seals and finishes, shape inside testing stand
Into the test cavity of an open top, longitudinal hydraulic cylinder is moved horizontally to most left（It is right）Side, makes upper ledge by operation adjusting nut
Move down to and testing stand top contact；
B, laying model.Model is laid in the mode of pouring, by base plate paving in the bottom of testing stand, and in the top of bottom plate
Multiple sensors are laid with lower section, coal seam is laid above bottom plate, top plate is laid in the top in coal seam, treat that top plate laying is finished
Afterwards, by pressing plate, riser applies lateral stress to opposite transverse hydraulic cylinder to the right, and longitudinal hydraulic cylinder applies longitudinal stress to top plate,
The constant coloured water under high pressure of pressure is injected into tank simultaneously；
C, the water treated in model drying, tank are led naturally in the soleplate excavates coal seam while collection is accordingly believed after liter stopping
Breath, until Water Inrush.
Testing stand is installed, sealing gasket, high-strength transparence plate and annular slab are installed successively before and after testing stand in order and are used in combination
Screw is fastened；Above-mentioned sealing is to coordinate to complete with high pressure injection fluid sealant using sealing gasket；Above-mentioned corresponding information is included in tank
Original lead of water is risen with elevation information, the generation change information of soleplate crack, base sheet stresses information, hydraulic pressure information, water infiltration bottom
Displacement information between the water amount information and roof and floor of plate.
Power gas tank and fluid reservoir are made up of the material of some strength, depending on its quantity is as needed, and interface
Do encapsulation process.Can both be filled with liquid in fluid reservoir also can insufflation gas.I.e. filling can fill coloured water under high pressure in tank, also
Coloured gases at high pressure can be filled.
Atmospheric pressure value in power gas tank can meet whole process of the test and use, and only need to test air pressure of preshoot；Storage
It can be accommodated in flow container in the middle of the liquid required for satisfaction experiment, experiment without liquid feeding body again.The present invention supplements hydraulic pressure using air pressure
Deficiency, the gas in power gas tank will not corrode regulating valve as water.Pressure sensor coordinates regulating valve, is controlled by PLC
The opening and closing of valve processed, in real time control, realize it is unattended, and in real time control ensure that fluid reservoir reclaimed water pressure stability in institute
The value of setting.
The present invention sets the good testing stand of a sealing at the middle part of outer framework, and sample is placed in testing stand, applied
Plus longitudinal stress and lateral stress, then excavate coal seam and collect related data, simulate high hydraulic pressure and dashed forward with bottom plate variation of lithological, bottom plate
Water overall process, so that the related data of Water Inrush is obtained, applied to the security in production operation, improving coal mining activity,
Simple to operate, good airproof performance of the invention, automaticity are high, result of the test is precisely closer to actual.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is the structural representation of simulation test device in Fig. 1；
Fig. 3 is the explosive view of testing stand in Fig. 1；
Fig. 4 is the structural representation of left riser and base in Fig. 3；
Fig. 5 is the enlarged drawing at A in Fig. 4；
Fig. 6 is the explosive view of the first carrying permeable structure in Fig. 3；
Fig. 7 is the amplification broken away view of Fig. 2 center platens；
Fig. 8 is the enlarged drawing of hydraulic control device in Fig. 1.
Embodiment
As shown in figures 1-8, the pilot system for simulating by mining influence coal seam bottom water bursting of the invention, including simulation
Experimental rig 67, operating console 1 and hydraulic control device 68, operating console 1 by control cable 2 respectively with simulated test
Device 67 and hydraulic control device 68 are connected, and hydraulic control device 68 is connected by water inlet pipe 3 with simulation test device 67.
Simulation test device 67 includes outer framework 4 and the testing stand 5 that is located in outer framework 4, outer framework 4 include lower frame 6, on
Frame 7, left frame 8 and right frame 9, lower frame 6 and upper ledge 7 are horizontally disposed with, and left frame 8 and right frame 9 are vertically arranged, the left and right ends of lower frame 6
It is fixedly connected respectively with the lower end of left frame 8 and the lower end of right frame 9, left frame 8 and the top of right frame 9 are equipped with fixing and mounting bracket 10, the He of left frame 8
The right upper end of frame 9 is provided with fixed plate 11, and upper ledge 7 is set in left frame 8 and right frame 9, and the left and right ends of upper ledge 7 are provided with respectively positioned at left frame
8 left sides and the portable plate 12 on the right side of right frame 9, are provided through the regulation spiral shell of portable plate 12 between fixed plate 11 and fixing and mounting bracket 10
The front side and rear side edge of the adjusting nut 14 fastened with portable plate 12, left frame 8 and right frame 9 are bolted with bolt 13, regulating bolt 13
Vertical direction has been evenly arranged mounting hole 15, and the front side of upper ledge 7 and rear side are fixedly connected by installation bolt with mounting hole 15 respectively；
The middle part of upper ledge 7 provided with longitudinal hydraulic cylinder 16, longitudinal piston rod 17 of longitudinal hydraulic cylinder 16 vertically downward, in left frame 8 and right frame 9
Portion is equipped with a horizontal top-pressure mechanism, and two horizontal top-pressure mechanisms are symmetrical set and structure is identical；The upper surface of lower frame 6 is set
There is supporting plate 18, the upper surface of supporting plate 18 is provided with the guide groove 19 opened up in left-right direction.
Testing stand 5 includes the tank 23 that open top is provided with base 20, left riser 21 and right riser 22, base 20, water
Provided with the first carrying permeable structure 24 in groove 23, the rear portion of base 20 is provided with water inlet 25 and delivery port 26, water inlet 25 and water inlet
The outlet connection of pipe 3, left riser 21 is vertically located at the left side of base 20, and the front side and rear lateral edge of left riser 21 and base 20 are provided with
L-type sealing gasket 28, high-strength transparence are sequentially provided with from inside to outside at overall L-shaped installation step groove 27, installation step groove 27
Plate 29 and annular slab 30, L-type sealing gasket 28, high-strength transparence plate 29 and annular slab 30 are fastened on base 20 by screw and a left side is vertical
On plate 21, the outline of high-strength transparence plate 29 and annular slab 30 is rectangular configuration, installation step groove 27 and high-strength transparence
Correspondence offers seal groove 31 between plate 29, and the middle part of L-type sealing gasket 28 offers the injecting glue gap 32 with the insertion of seal groove 31, note
Flexible rubber hose is provided with glue-line gap 32（Flexible rubber hose is not illustrated in figure to be come）, flexible rubber hose is provided with the injecting glue communicated with seal groove 31
Hole；The right left-hand face of riser 22, which is provided with U-type groove, U-type groove, is provided with U-shaped sealing gasket 33, and the right side of base 20, two pieces of high intensity are saturating
The right of isotropic disk 29 is along extending into U-type groove and be engaged with U-shaped sealing gasket 33, left riser 21, base 20, right riser 22
The test cavity of open top is encircled between two blocks of high-strength transparence plates 29, the bottom of base 20, the lower end of right riser 22 are equipped with
The back-up roller wheel 34 moved along guide groove 19.
Hydraulic control device 68 is included in the pedestal 35 that external form is in truncated cone-shaped, pedestal 35 provided with the second carrying permeable structure 36
With the supporting plate 18 on the second carrying permeable structure 36, supporting plate 18 is provided with power gas tank 37 and positioned at power gas tank 37
At least three fluid reservoirs 38 of surrounding, each bottom of fluid reservoir 38 is connected by a section connecting tube with the second carrying permeable structure 36
Logical, each sidepiece of fluid reservoir 38 is equipped with liquid level gauge 39, and each top of fluid reservoir 38 passes through pneumatic tube 40 and power gas tank 37
First regulating valve 41 and the feed liquor pipe joint positioned at the lower section of the first regulating valve 41 are equipped with connection, each pneumatic tube 40
42, the top of fluid reservoir 38 is less than the second regulating valve 43 of the first regulating valve 41 provided with aperture, and the bottom of power gas tank 37 is provided with safety
Valve 44, the top of power gas tank 37 is provided with pressure gauge 45 and relief valve 46, and the top of power gas tank 37 is provided with gases at high pressure charging joint
47；The sidepiece of pedestal 35 is provided with the water out adapter 48 being connected with water inlet pipe 3, and water out adapter 48 is provided with pressure sensor 49.
First carrying permeable structure 24 is identical with the construction of the second carrying permeable structure 36, and the first carrying permeable structure 24 is wrapped
Include and offer lower permeable hole 52, stringer board 50 and transverse slat on vertically disposed stringer board 50 and transverse slat 51, stringer board 50 and transverse slat 51
51 equal cross-fixings connect to form support frame, and support frame is provided with lower porous disc 53, and lower porous disc 53 is provided with upper porous disc 54,
Upper porous disc 54 uniformly offers permeable seam 55 along vertical and horizontal, and lower porous disc 53 is provided with upper permeable hole penetrating up and down
56。
Horizontal top-pressure mechanism on right frame 9 include pressing plate 57 and the installing frame 58 being located on right frame 9, top guide bar 61 and under
Guide rod 62, installing frame 58 is located at the right side of right frame 9, and installing frame 58 is provided with transverse hydraulic cylinder 59, the transverse direction of transverse hydraulic cylinder 59
The level of piston rod 60 passes through right frame 9 to the left, and top guide bar 61 and lower guide rod 62 are located above and below horizontal piston bar 60 respectively,
Top guide bar 61, horizontal piston bar 60 and lower guide rod 62 are be arranged in parallel, and the left end of top guide bar 61 and lower guide rod 62 is stretched into through right frame 9
Into installing frame 58, pressing plate 57 is vertically arranged, and top guide bar 61 and the left end of lower guide rod 62 pass through mounting disc 63 and the right side of pressing plate 57
Face is fixedly connected, and the lower end of pressing plate 57 is provided with the expansion plate 64 of length adjustable, and the left surface and the right side of pressing plate 57 and expansion plate 64 are vertical
The right surface of plate 22 is contacted by the top pressure of transverse hydraulic cylinder 59.
The lower end of left frame 8 and the junction of the left end of lower frame 6 are provided with left socle 65, the right lower end of frame 9 and the junction of the right-hand member of lower frame 6
Provided with right support 66, the bottom of left socle 65, right support 66 and lower frame is located in same level.Left socle 65 and right support 66
Stability for strengthening outer framework 4.
The top of outer framework 4 is provided with longitudinal hydraulic cylinder 16, and the left and right sides of the outer framework 4 is respectively arranged with transverse hydraulic cylinder
59 and for lifting the adjusting screw rod of upper ledge 7, the transverse hydraulic cylinder 59 of left frame 8 and right frame 9 is arranged in opposite directions, the right side of left frame 8 and
The right left side of frame 9 is provided with a pressing plate 57 being vertically arranged, and the bottom of pressing plate 57 is configured with expansion plate 64.The middle part of the outer framework 4
Testing stand 5 is provided with, the front and rear sides of the testing stand 5 are respectively arranged with high-strength transparence plate 29 and annular slab 30, testing stand 5
Test cavity be used for placing sample, sample uses the frame mode of top plate, coal seam and bottom plate.Set in the base 20 of testing stand 5
There is a tank 23, the water inlet 25 at the rear portion of tank 23 can be connected with outside hydraulic control device 68, hydraulic pressure control dress
Put 68 and provide constant water under high pressure for tank 23.The first carrying permeable structure 24 is placed with tank 23, the carrying permeable structure
On be provided with the permeable region being connected with the tank 23, the permeable region is by upper porous disc 54 and two parts group of lower porous disc 53
Into, lower porous disc 53 is connected by small upper permeable hole 56 with the aqueous phase in tank 23, it is upper it is permeable pass through it is permeable seam 55 same tanks
Water in 23 is connected with the sample in test cavity.
In order to further improve the present invention performance, testing stand 5 include into the base 20 and left riser 21 of " L " shape with
And " I "-shape right riser 22, base 20 and the bottom of right riser 22 are respectively equipped with roller, in supporting plate 18 that can be on base 20
Guide groove 19 in move horizontally.In order to improve the sealing property that testing stand 5 is overall, the left surface of right riser 22 offers U-shaped
It is placed with U-shaped sealing gasket 33 in groove, U-type groove, the left surface and height of its shapes and sizes and the right riser 22 after installing
The right of intensity transparent panel 29 is along matching, and making the right side of the right riser 22 after installing and high-strength transparence plate 29 can just pacify
Insert, the transverse hydraulic cylinder of the left and right sides of outer framework 4 is realized by the deformation of above-mentioned U-shaped sealing gasket 33 in process of the test
The horizontal loading of 59 pairs of models, at the same time, the lateral stress that transverse hydraulic cylinder 59 applies makes the right side of the structure after installing
Side contacts even closer with U-shaped sealing gasket 33, improves its sealing property.
Further, it is the sealing effectiveness of the front and rear sides of guarantee test platform 5, the present invention is in base 20 and left riser 21
Front and rear sides offer tiny seal groove 31 respectively, and seal groove on the other side is also offered in high-strength transparence panel side
31, the sealings of the front and rear sides of testing stand 5 in addition to L-type sealing gasket 28 except also coordinating the fluid sealant of high pressure injection close to fill L-type
Gap and tiny seal groove 31 at packing 28, with the sealing effectiveness of the front and rear sides of Optimum Experiment platform 5.Wherein, above-mentioned L-type is close
Flexible rubber hose is configured with packing 28, above-mentioned sealed concrete operations are as follows：First in the front and rear sides of base 20 and left riser 21
L-type sealing gasket 28, high-strength transparence plate 29 and annular slab 30 are respectively mounted in order（For protect high-strength transparence plate 29 not by
Vertical/horizontal stress rupture）, and tightly fixed with screw；Secondly base 20 and two blocks of high-strength transparence plates after installing
29 splice with right riser 22；Finally fluid sealant, the sealing of injection are injected with flexible rubber hose of the high-pressure installation into L-type sealing gasket 28
Glue is filled into seal groove 31 tiny at L-type sealing gasket 28 under high pressure effect by hole for injecting glue, is so considerably improved it
Sealing property.
Hole for injecting glue is provided with flexible rubber hose at a certain distance, hole for injecting glue connects with the seal groove 31 on base 20 and left riser 21
It is logical.Seal groove 31 also is provided with high-strength transparence plate 29.The fluid sealant of high pressure injection enters seal groove 31 and in high pressure effect
Under be diffused into crack between other high-strength transparence plates 29 and testing stand 5, and then the sealing effectiveness of Optimum Experiment platform 5.
The base 20 of the bottom of testing stand 5 at the middle part of outer framework 4 is provided with tank 23 in the present invention, passes through outside hydraulic pressure
The coloured water under high pressure of injection into it of control device 68, naturally it is also possible to inject coloured gases at high pressure, bottom plate gas is simulated with this
Prominent correlation test；And tank 23 is typically using the stainless steel sink 23 with certain support permeable structure, its size one
As be 990mm × 200mm × 170mm（Length × width × height）, the inside of tank 23 is placed with the first support permeable structure.First
Support permeable structure facilitates the lower porous disc 53 and upper porous disc 54 set on the contact in tank 23 between test cavity, support frame, indulges
Lower permeable hole 52 is offered on plate 50 and transverse slat 51, upper porous disc 54 uniformly offers permeable seam 55 along vertical and horizontal, under
Porous disc 53 can be such that bottom plate is contacted with constant high-pressure water, the hydraulic pressure load of water under high pressure provided with upper permeable hole 56 penetrating up and down
It can convert as needed.It can also be realized simultaneously by cramming the hole of upper porous disc 54 and lower porous disc 53 to test cavity size
And its control of shape.Side offers apopore behind tank 23, is discharged water after being easy to experiment.Water can use colored water,
Situations such as being easy to by the leading liter of the observation analysis artesian water of high-strength transparence plate 29, diffusion and percolation path, facilitates user behaviour
Make and record correlation behavior.
The present invention can meet a variety of test methods and research technique, wherein, above-mentioned a variety of test methods and research technique master
Including：
1st, the experimental system can be done about being tested by mining influence coal seam bottom water bursting, can also arrange disconnected in the soleplate
The geological structures such as layer, laterally loading can realize the activation or compacting of tomography；
2nd, in the tank 23 of the bottom of testing stand 5, the high pressure colored water of injection can be made into inject high pressure colored gas
To do the physical simulation experiment about bottom plate Gas Outburst；
3rd, the expansion plate 64 of the bottom of pressing plate 57 can be released down, then testing stand 5 is taken out, it is possible to not needed
Sealing, the bigger analog simulation experiment of moulded dimension, lateral stress can add as needed to be not added with.
The operation principle of hydraulic control device 68 is in the present invention:Pressure sensor 49 measures the actual confession at delivery port 26
Hydraulic coupling, is sent to pressure controller and the pressure value of desired control in operating console 1（Set-point）It is compared, works as reality
Border pressure ratio set-point is low, and pressure controller then controls the first regulating valve 41 to open, and makes power gas tank 37 and the UNICOM of fluid reservoir 38,
Gases at high pressure enter pressure rise in fluid reservoir 38, fluid reservoir 38, until actual liquid supply pressure is equal with set-point, then first adjust
Section valve 41 is closed.When actual pressure is higher than set-point, pressure controller then controls the second regulating valve 43 to open, and makes in fluid reservoir 38
Gases at high pressure part gush, the pressure in reduction fluid reservoir 38, until actual liquid supply pressure is equal with set-point, then the second tune
Section valve 43 is closed.Only when actual liquid supply pressure is equal with set-point（There is no deviation）, pressure controller, which is exported, keeps constant,
First regulating valve 41 and the second regulating valve 43 are remained closed, and liquid supply pressure keeps constant.When being increased or decreased such as liquid supply pressure again,
Again cause the reduction or rise of actual pressure, control pressurer system is acted again, until actual pressure again with set-point phase
Deng untill.It should be noted that the liquid level of liquid may not exceed the position line of the upper end of liquid level gauge 39 restriction in fluid reservoir 38.
The role of second carrying permeable structure 36 in hydraulic control device 68 is by among multiple fluid reservoirs 38
Liquid can make water under high pressure have individual storage in bottom by the second carrying permeable structure 36, play the store buffer of water, prevent
After water in fluid reservoir 38 is finished, in addition it is also necessary to still leave a part in the second carrying permeable structure 36 during water and use.
The present embodiment not makees any formal limitation to shape, material, structure of the present invention etc., every according to this hair
Any simple modification, equivalent variations and modification that bright technical spirit is made to above example, belong to the technology of the present invention side
The protection domain of case.
Claims (4)
1. for simulating the pilot system by mining influence coal seam bottom water bursting, it is characterised in that：Including simulation test device, behaviour
Make console and hydraulic control device, operating console by control cable respectively with simulation test device and hydraulic control device
Connection, hydraulic control device is connected by water inlet pipe with simulation test device；
Simulation test device includes outer framework and the testing stand being located in outer framework, and outer framework includes lower frame, upper ledge, left frame and the right side
Frame, lower frame and upper ledge be horizontally disposed with, left frame and right frame are vertically arranged, lower frame left and right ends respectively with left frame lower end and right frame
Lower end is fixedly connected, and left frame and right frame top are equipped with fixing and mounting bracket, and left frame and right frame upper end are provided with fixed plate, and upper ledge is worn
In left frame and right frame, upper ledge left and right ends are provided with the portable plate being located at respectively on the left of left frame and on the right side of right frame, fixed plate and solid
Dingan County is provided through being bolted with the adjusting nut fastened with portable plate in the regulating bolt of portable plate, regulating bolt between shelving,
The front side and rear side of left frame and right frame have vertically been evenly arranged on front side of mounting hole, upper ledge and rear side is respectively by installing spiral shell
Bolt is fixedly connected with mounting hole；Provided with longitudinal hydraulic cylinder in the middle part of upper ledge, longitudinal piston rod of longitudinal hydraulic cylinder vertically downward, left frame
With a horizontal top-pressure mechanism is equipped with the middle part of right frame, two horizontal top-pressure mechanisms are symmetrical set and structure is identical；Under
Frame upper surface is provided with supporting plate, and support plate upper surface is provided with the guide groove opened up in left-right direction；
Testing stand is included in the tank that open top is provided with base, left riser and right riser, base, tank provided with the first carrying
Permeable structure, base rear portion is provided with water inlet and delivery port, and the outlet of water inlet and water inlet pipe is connected, and left riser is vertically located at bottom
Seat left side, the front side and rear lateral edge of left riser and base are provided with overall L-shaped installation step groove, installation step groove by interior
L-type sealing gasket, high-strength transparence plate and annular slab outwards are sequentially provided with, L-type sealing gasket, high-strength transparence plate and annular slab pass through
Screw is fastened on base and left riser, and the outline of high-strength transparence plate and annular slab is rectangular configuration, installation step groove
Corresponding offer offers injecting glue gap in the middle part of seal groove, L-type sealing gasket between high-strength transparence plate, and injecting glue is provided with gap
Flexible rubber hose, flexible rubber hose is provided with the hole for injecting glue communicated with seal groove；Right riser left-hand face, which is provided with U-type groove, U-type groove, is provided with U
Grommet type seal, base right side, the right of two blocks of high-strength transparence plates are along extending into U-type groove and contacted with U-shaped sealing gasket
Coordinate, be encircled into the test cavity of open top between left riser, base, right riser and two blocks of high-strength transparence plates, base bottom,
Right riser lower end is equipped with the back-up roller wheel moved along guide groove；
First carrying permeable structure includes offering lower permeable hole on vertically disposed stringer board and transverse slat, stringer board and transverse slat,
Stringer board and the equal cross-fixing of transverse slat connect to form support frame, and support frame is provided with lower porous disc, and lower porous disc is provided with upper permeable
Plate, upper porous disc uniformly offers permeable seam along vertical and horizontal, and lower porous disc is provided with upper permeable hole penetrating up and down.
2. according to claim 1 be used to simulate the pilot system by mining influence coal seam bottom water bursting, it is characterised in that：
Hydraulic control device includes provided with the second carrying permeable structure and saturating positioned at the second carrying in the pedestal that external form is in truncated cone-shaped, pedestal
Supporting plate on water-bound, supporting plate is provided with power gas tank and at least three fluid reservoirs around power gas tank, each
Liquid storage pot bottom is connected by a section connecting tube with the second carrying permeable structure, and each fluid reservoir sidepiece is equipped with liquid level gauge,
It is connected at the top of each fluid reservoir by pneumatic tube with power gas tank, first regulating valve and position is equipped with each pneumatic tube
Feed liquor pipe joint below the first regulating valve, fluid reservoir top is less than the second regulating valve of the first regulating valve provided with aperture, moves
Strength tank bottom is provided with safety valve, and power gas tank top, which is provided with the top of pressure gauge and relief valve, power gas tank, is provided with gases at high pressure
Charging joint；Pedestal sidepiece is provided with the water out adapter being connected with water inlet pipe, and water out adapter is provided with pressure sensor；First carrying
The construction of permeable structure and the second carrying permeable structure is identical.
3. according to claim 2 be used to simulate the pilot system by mining influence coal seam bottom water bursting, it is characterised in that：
Horizontal top-pressure mechanism on right frame includes pressing plate and the installing frame, top guide bar and the lower guide rod that are located on right frame, and installing frame is located at
The right side of right frame, installing frame is provided with transverse hydraulic cylinder, and the horizontal piston bar level of transverse hydraulic cylinder passes through right frame, above led to the left
Bar and lower guide rod are located above and below horizontal piston bar respectively, and top guide bar, horizontal piston bar and lower guide rod be arranged in parallel, on
The left end of guide rod and lower guide rod is extend into installing frame through right frame, and pressing plate is vertically arranged, and top guide bar and lower guide rod left end lead to
Cross mounting disc to be fixedly connected with pressing plate right flank, pressing plate lower end is provided with a left side for the expansion plate of length adjustable, pressing plate and expansion plate
Side is contacted with the right surface of right riser by transverse hydraulic cylinder top pressure.
4. being used for according to claim 1 or 2 or 3 simulates the pilot system by mining influence coal seam bottom water bursting, it is special
Levy and be：Left frame lower end and the junction of lower frame left end are provided with left socle, and right frame lower end and the junction of lower frame right-hand member are provided with the right side
Support, the bottom of left socle, right support and lower frame is located in same level.
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| CN106769512A (en) * | 2016-12-31 | 2017-05-31 | 河北工程大学 | Non-homogeneous load testing machine for simulating Water Inrush |
| CN107449672A (en) * | 2017-07-28 | 2017-12-08 | 太原理工大学 | A kind of experimental provision and method for simulating gushing water seat earth compression coupling |
| CN115144563B (en) * | 2022-07-04 | 2023-07-21 | 河南大学 | Three-dimensional simulation device and method for fault activation induced coal seam overlying strata separation layer water burst |
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| CN103018106B (en) * | 2012-11-27 | 2015-08-19 | 中国矿业大学(北京) | A kind of can the experiment porch of control simulation piestic water loading and coal seam floor failure relation |
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