CN102621229B - Large simulation test piece box for multi field coupling coal mine dynamic disaster - Google Patents
Large simulation test piece box for multi field coupling coal mine dynamic disaster Download PDFInfo
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- CN102621229B CN102621229B CN 201210082328 CN201210082328A CN102621229B CN 102621229 B CN102621229 B CN 102621229B CN 201210082328 CN201210082328 CN 201210082328 CN 201210082328 A CN201210082328 A CN 201210082328A CN 102621229 B CN102621229 B CN 102621229B
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Abstract
The invention discloses a large simulation test piece box for a multi field coupling coal mine dynamic disaster, and the large simulation test piece box comprises a box body, wherein the box body is provided with X-directional, Y-directional and Z-directional platens; the front box plate of the box body is provided with an extruded hole; the bottom of the box body is provided with a ventilating steel plate and an air flue; the ventilating steel plate covers the air flue; the inlet of the air flue is provided with an inner plug; the exterior of the left box plate of the box body is fixedly connected with first base plates at intervals; the left box plate is provided with sensor interfaces in the interval between the first base plates; and the sensor interface is provided with a sensor joint. According to the large simulation test piece box, the coal-rock mass gas pressure, the ground stress and the temperature variation as well as the time-spatial revolution rule of the acoustic emission signal of the coal-rock mass before and after the coal mine dynamic disaster happens can be monitored so as to achieve the purposes of researching internal relation among a stress field, a seepage field, a temperature field and a fracture field and the mutually-coupling action mechanism in the coal mine dynamic disaster process so as to more deeply disclose the generation mechanism of the coal mine dynamic disaster, and a theoretical basis is provided for the coal mine dynamic disaster prevention and treatment.
Description
Technical field
The present invention relates to a kind of test specimen case of simulating colliery dynamic disaster process under many coupling mechanism.
Background technology
The colliery dynamic disaster is in process of coal mining, gather the coal and rock of great number of elastic energy under high-stress state, suddenly failure, inbreak under certain conditions or dish out, make the energy sudden outburst, present the obviously extremely complicated dynamic phenomenon of dynamic effect such as the sound, vibrations and blast, it mainly contains coal petrography and Gas Outburst, rock burst and large tracts of land roof fall three kinds of principal modes, the safety in production in serious threat colliery and miner's life security.Being difficult to prediction and holding of dynamic disaster, the action pathway that it is inherent and mechanism also thoroughly are not familiar with by mankind institute, and along with the increase day by day of the coal mining degree of depth, colliery dynamic disaster occurrence frequency is more and more higher, intensity is also increasing, the mine motive force disaster cause calamity mechanism, trigger condition, Evolution and becoming increasingly complex of presentation attributes, at present, also lack breeding-occurring-evolution mechanism dynamic disaster under Mining in Deep-lying Conditions, the systematic study of Basic Science Problem and early warning Preventing Countermeasures, therefore strengthen colliery dynamic disaster mechanism, the research of prediction and prophylactico-therapeutic measures thereof is extremely important.Coal and gas outburst mechanism aspect, the scholar admits the combined action hypothesis mostly, it thinks that coal petrography and Gas Outburst are by the coefficient result of the physico-mechanical properties of terrestrial stress, gas, coal, but how on earth still very unclear the percentage contribution of three in coal petrography and Gas Outburst be, and gas pressure, stress of coal seam and the coal and rock temperature temporal and spatial evolution before and after coal and Gas Outburst is still very undistinct, therefore coal petrography and gas outburst mechanism are still indefinite, and this has manufactured a difficult problem to the preventing and controlling of colliery dynamic disaster.
In prior art, mainly there is following problem in the test unit of simulation colliery dynamic disaster: the moulded dimension that (1) adopts is less, and the evolution of simulation dynamic disaster has certain space constraint; (2) automaticity that device is installed is lower; (3) the device sealing is not high, and the simulation gas pressure is little, and the pressure of test simulation gas can not approach field condition; (4) opening speed of aspis baffle plate is slow or have certain time delay, affected to a certain extent the time and intensity of coal petrography and Gas Outburst, so the realistic simulation situation is with truly still there are difference in down-hole coal petrography and Gas Outburst; (5) terrestrial stress of simulation can not simulate the stress raisers that the face of adopting causes due to mining activity fully; (6) the coal and rock parameter acquisition of outstanding mould inside is inadequate, and most cases is only to have gathered temperature and gas pressure, and collection point is comparatively single, can not be analyzed and researched to stress and the temperature rule of development of coal and rock inside before and after the dynamic disaster of colliery.
Therefore those skilled in the art are devoted to develop a kind of pilot system that can accurately simulate colliery dynamic disaster process, with scientific research colliery dynamic disaster mechanism.
Summary of the invention
Because the above-mentioned defect of prior art, technical matters to be solved by this invention is to provide a kind of pilot system that can accurately simulate colliery dynamic disaster process.
For achieving the above object, the invention provides a kind of many coupling colliery dynamic disaster large scale mock up test systems, comprise frame and be placed in the test specimen case on described frame; Described test specimen case comprises casing; The top of described casing has been bolted to connection cover plate; Be provided with at least three Z-direction depression bar covers on described cover plate; Be provided with the Z-direction depression bar in each Z-direction depression bar cover; Be fixedly connected with the Z-direction pressing plate on described Z-direction depression bar; Described Z-direction pressing plate is positioned at described casing; Be provided with at least three Y-direction depression bar covers on the right boxboard of described casing; Be provided with the Y-direction depression bar in each Y-direction depression bar cover; Be fixedly connected with the Y-direction pressing plate on described Y-direction depression bar; Described Y-direction pressing plate is positioned at described casing; Be provided with at least one X-direction depression bar cover on the rearing-box plate of described casing; Be provided with the X-direction depression bar in each X-direction depression bar cover; Be fixedly connected with the X-direction pressing plate on described X-direction depression bar; Described X-direction pressing plate is positioned at described casing; The front boxboard of described casing is provided with aspis; The bottom of described casing is provided with air permeable steel plate and air flue; Described air permeable steel plate covers on described air flue; The import of described air flue is provided with interior plug; The outside interval of the left boxboard of described casing is fixedly connected with the first backing plate; Described left boxboard is provided with sensor interface between the interval of each the first backing plate; Be provided with sensor connector in described sensor interface; Described frame comprises base; Be fixed with left column and right column on described base; The upper end of described left column and right column is fixed with crossbeam; Described test specimen case is placed on described base; Be provided with the Z-direction pressurized cylinder corresponding with the quantity of described Z-direction depression bar and position on described crossbeam; Be provided with the Y-direction pressurized cylinder corresponding with described Y-direction depression bar quantity and position on described right column; Be provided with second backing plate corresponding with described the first backing plate position on described left column; The rear end of described base is fixedly connected with and adds seat; Described adding on seat, be provided with the X-direction pressurized cylinder corresponding with the quantity of described X-direction depression bar and position; This pilot system also comprises the reaction frame that can be fixedly connected with the front portion of described base; Described reaction frame comprises base plate; Be provided with a plurality of bolt connecting holes on described base plate; The rear portion of described base plate is provided with riser; On described riser, be provided with can be relative with described aspis the first opening; The rear portion of described riser is fixedly connected with doorframe; Be provided with second opening relative with described the first opening on described doorframe; But corresponding described the second opening part of described doorframe is provided with left sliding door and the right sliding door of the described aspis of shutoff and described the second opening; Described left sliding door is connected with left cylinder; Described right sliding door is connected with right cylinder; Two positions up and down of the front shop front of described left sliding door and right sliding door all and be provided with the first roller between described doorframe; Two sides up and down of described left sliding door and right sliding door all and be provided with the second roller between described doorframe; Be respectively arranged with left seal pad and right seal pad on the right opposite of described left sliding door and right sliding door; The end of the corresponding described left sliding door of described test specimen case and right sliding door is provided with the second O-ring seal.
For improving the sealing of test specimen case, the top of the left boxboard of described casing, right boxboard, front boxboard and rearing-box plate is staircase structure, described staircase structure is greater than the height away from described cabinets cavity near the height of described cabinets cavity, thereby makes the top of described casing form boss; Described cover plate and described casing fasten; At described boss place, between described cover plate and described casing, be provided with sealing gasket; Described cover plate and described casing are bolted to connection at described boss place.
For adapting to the different dimensional requirement of aspis, be bolted to connection outstanding cover in described aspis; Be provided with the first O-ring seal between described outstanding cover and described front boxboard; Described the second O-ring seal is arranged on the end that described outstanding cover is relative with right sliding door with described left sliding door.
Provide direct data for obtaining coal petrography and Gas Outburst Void Formation and coal and Gas Outburst evolution, studied the evolution of the spatial shape of hole, the temporal-spatial evolution phenomenon visual reproduction of realization to coal fracturing in coal and Gas Outburst, the spatial shape of the inner acoustic emission of research coal body, be provided with the probe mounting hole on the boxboard of described casing; Described probe mounting hole is welded with plug near inner chamber one end of described casing, away from inner chamber one end of described casing, is combined with the first bolt; The arranged outside sound source probe of described plug; Be pressed with spring between the end face of described sound source probe and described the first bolt; Be provided with the first axially extending bore on described the first bolt; Be combined with the second bolt in described the first axially extending bore; Be provided with the second axially extending bore on described the second bolt; The external wire of described sound source probe picks out from described the first axially extending bore and the second axially extending bore.
For improving the reliability of sound source probe, described the first axially extending bore comprises taper hole; The aperture of described taper hole diminishes gradually along the direction near described cabinets cavity; Be positioned at described taper hole place in described the first axially extending bore and be provided with cutting ferrule; Described the second bolt is arranged on the outside of described cutting ferrule; The front end of described cutting ferrule is coniform, and its tapering is less than the tapering of described taper hole; The front end edge of described cutting ferrule axially is provided with at least two open slots; Described open slot is uniform at circumferencial direction.
Be placed into for ease of the test specimen case on the base of frame, between described test specimen case and described base, Rolling base be set; Described Rolling base comprises the rolling seat be fixedly connected with described base and is arranged at the rolling body in the described seat that rolls.
Complex distributions phenomenon for stress of coal seam during different top board operational phase in mining process under more real simulation well, be fixedly connected with four described Z-direction depression bar covers on described cover plate; The front end of described casing is provided with four described Y-direction depression bar covers; The left end of described casing is provided with a described X-direction depression bar cover.
For avoiding mutually interfering between the three-dimensional loading force, the corner of the Z-direction pressing plate that described X-direction pressing plate is adjacent is provided with the first anti-interference plate; The corner of the Y-direction pressing plate that described X-direction pressing plate is adjacent is provided with the second anti-interference plate; The corner of the Z-direction pressing plate that each described Y-direction pressing plate is adjacent is provided with the 3rd anti-interference plate.
Parameter for coal and rock inside before and after collection of coal mine dynamic disaster more accurately, be arranged with the described sensor interface of three row in parallel on the left boxboard of described casing; On the close direction of described aspis, the distribution density of described sensor interface strengthens gradually.
Preferably, described sensor interface is provided with 18 at every row.
The invention has the beneficial effects as follows: the present invention can monitor the temporal and spatial evolution that the acoustic emission signal of front and back coal and rock gas pressure, terrestrial stress, temperature variation and coal and rock occurs the colliery dynamic disaster, reach inner link between research stress field, seepage field, temperature field and field, crack and the purpose of the mechanism of action that intercouples thereof in the dynamic disaster process of colliery, thereby disclose to a deeper level the mechanism that the colliery dynamic disaster occurs, for dynamic disaster control in colliery is provided fundamental basis.
The accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is the plan structure schematic diagram of Fig. 1.
Fig. 3 is the left TV structure schematic diagram of Fig. 1.
Fig. 4 is the partial enlarged drawing at A place in Fig. 1.
Fig. 5 is the structural representation of test specimen case in the embodiment of the invention.
Fig. 6 is the plan structure schematic diagram of Fig. 5.
Fig. 7 is the left TV structure schematic diagram of Fig. 5.
Fig. 8 is the partial enlarged drawing at I place in Fig. 5.
Fig. 9 is the partial enlarged drawing at II place in Fig. 5.
Figure 10 is the partial enlarged drawing at III place in Fig. 5.
Figure 11 is the partial enlarged drawing at IV place in Fig. 5.
Figure 12 is the mounting structure schematic diagram of sound source probe in the embodiment of the invention.
Figure 13 is the partial enlarged drawing at V place in Figure 12.
Figure 14 is the structural representation of cutting ferrule in the embodiment of the invention.
Figure 15 is the upward view of Figure 14.
Figure 16 is the structural representation of embodiment of the invention mid frame.
Figure 17 is the plan structure schematic diagram of Figure 16.
Figure 18 is the left TV structure schematic diagram of Figure 16.
Figure 19 is the structural representation of reaction frame in the embodiment of the invention.
Figure 20 is the plan structure schematic diagram of Figure 19.
Figure 21 is the left TV structure schematic diagram of Figure 19.
Figure 22 is the partial enlarged drawing at VI place in Figure 19.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described:
As shown in Figures 1 to 4, a kind of many coupling colliery dynamic disaster large scale mock up test systems, comprise frame 200 and be placed in the test specimen case 100 on frame 200.
As shown in Fig. 5 to Figure 11, cover plate 4 fastens with casing 1.At boss 48 places, be provided with sealing gasket 49 between cover plate 4 and casing 1, and cover plate 4 is bolted to connection at boss 48 places with casing 1.
In the present embodiment, be fixedly connected with four Z-direction depression bar covers 2 on cover plate 4, in each Z-direction depression bar cover 2, be provided with Z-direction depression bar 3, be fixedly connected with Z-direction pressing plate 11 on Z-direction depression bar 3, Z-direction pressing plate 11 is positioned at casing 1.In other embodiments, also can be fixedly connected with the Z-direction depression bar cover 2 of other quantity more than three on cover plate 4, as 3,5,6 etc., to reach essentially identical technique effect.
Be provided with four Y-direction depression bar covers 5 on the right boxboard of casing 1, in each Y-direction depression bar cover 5, be provided with Y-direction depression bar 6, be fixedly connected with Y-direction pressing plate 12 on Y-direction depression bar 6, Y-direction pressing plate 12 is positioned at casing 1.In other embodiments, also can be fixedly connected with the Y-direction depression bar cover 5 of other quantity more than three on right boxboard, as 3,5,6 etc., to reach essentially identical technique effect.
Be provided with an X-direction depression bar cover 7 on the rearing-box plate of casing 1, in each X-direction depression bar cover 7, be provided with X-direction depression bar 8, be fixedly connected with X-direction pressing plate 13 on X-direction depression bar 8, X-direction pressing plate 13 is positioned at casing 1.In other embodiments, also can be fixedly connected with the X-direction depression bar cover 7 of other quantity on rearing-box plate, as 2,3,4 etc., to reach essentially identical technique effect.
The corner of the Z-direction pressing plate 11 that X-direction pressing plate 13 is adjacent is provided with the first anti-interference plate 14, the corner of the Y-direction pressing plate 12 that X-direction pressing plate 13 is adjacent is provided with the second anti-interference plate 59, and the corner of the Z-direction pressing plate 11 that each Y-direction pressing plate 12 is adjacent is provided with the 3rd anti-interference plate 15.
In the present embodiment, all be disposed with F4 bronze compound substance guidance tape 55, ST oblique crank Z combination sealing box 56, J-shaped between the depression bar cover of three directions and depression bar without bone dust ring 57, be provided with sealing gasket 58 between depression bar cover and casing or cover plate, simultaneously in conjunction with other hermetically-sealed constructions in the present embodiment, make the impermeability of test specimen case reach the standard of 6MP; Simultaneously, when this hermetically-sealed construction makes to load, friction force is very little, and easy for installation.
The front boxboard of casing 1 is provided with aspis 9, has been bolted to connection outstanding cover 10 in aspis 9, between outstanding cover 10 and front boxboard, is provided with the first O-ring seal 47.The highlight of test specimen case is designed to dismountable structure, therefore can meets different testing requirementss by the outstanding cover 10 of changing different inner diameters.
The bottom of casing 1 is provided with air permeable steel plate 16 and air flue 17, and air permeable steel plate 16 covers on air flue 17.The import of air flue 17 is provided with interior plug 54, and in this, plug 54 can be connected with external tracheae.
The outside interval of the left boxboard of casing 1 is fixedly connected with four lines the first backing plate 28, and left boxboard is provided with a line sensor interface 18 between the interval of each the first backing plate 28, is provided with sensor connector 19 in sensor interface 18, and this sensor connector 19 is Aviation Connector.The quantity of every line sensor interface 18 is 18, and, on the close direction of aspis 9, the distribution density of sensor interface 18 strengthens gradually.
In the present embodiment, each sensor connector 19 places can access methane gas pressure transducer, coal seam pressure transducer and coal seam temperature sensor simultaneously.Wherein, adopt 24 methane gas pressure transducers to measure pressure and the concentration of methane gas, specification is 10MPa, measuring accuracy ± 1%; 24 coal seam pressure transducers, specification is 10MPa, measuring accuracy ± 1%; 12 coal seam temperature sensors, specification is 0～100 ℃, measuring accuracy ± 1 ℃.Sensor is connected with 88 channel data collection plates, and 8 channel data collection plates communicate by hub and computer system, thereby the composition data acquisition system realizes collection, transmission, demonstration and the preservation of data.
Each sensor can be uniform on the test specimen case, also can regulate three kinds of sensor measuring positions in the test specimen case to meet the actual test request in different perturbation process.General, can comparatively intensive sensor be set in the front portion of test specimen case, to measure more accurately outstanding related data.
Front portion on the left and right boxboard of casing 1 arranges respectively four probe mounting holes 30, and rear portion is provided with two probe mounting holes 30, the rectangular arrangement of each mounting hole of popping one's head in.
As shown in Figure 12 to Figure 15, probe mounting hole 30 is welded with plug 31 near inner chamber one end of casings 1, away from inner chamber one end of casing 1, is combined with the first bolt 32.The arranged outside sound source probe 33 of plug 31, be pressed with spring 34 between the end face of sound source probe the 33 and first bolt 32.Be provided with the first axially extending bore 35 on the first bolt 32, be combined with the second bolt 36 in the first axially extending bore 35, be provided with the second axially extending bore 37 on the second bolt 36, be provided with steel pipe 64 in the second axially extending bore 37, the steel pipe 64 of external wire 62 from the first axially extending bore 35 and the second axially extending bore 37 of sound source probe 33 picks out.
The first axially extending bore 35 comprises taper hole 35a, and the aperture of taper hole 35a diminishes gradually along the direction near casing 1 inner chamber.Be positioned at taper hole 35a place in the first axially extending bore 35 and be provided with the outside that cutting ferrule 38, the second bolts 36 are arranged on cutting ferrule 38.Cutting ferrule 38 adopts flexible material, and its front end is coniform, and tapering is less than the tapering of taper hole 35a.Therefore, when screwing the second bolt 36, the front end of cutting ferrule 38 is oppressed and is out of shape, thereby clamps the external wire 62 of sound source probe 33; When unclamping the second bolt 36, cutting ferrule 38 automatically reverts to original shape, thus the convenient sound source probe 33 that takes out.
In the present embodiment, when unclamping the second bolt 36, can better reinstatement in order to make cutting ferrule 38, cutting ferrule 38 adopts 9 chromium 18 molybdenum stainless steels, and the front end edge of cutting ferrule 38 axially is provided with three open slot 38a, and open slot 38a is uniform at circumferencial direction.
As shown in Figure 16 to 18, frame 200 comprises base 20, is fixed with left column 21 and right column 22 on base 20, and the upper end of left column 21 and right column 22 is fixed with crossbeam 23.Base 20, left column 21, right column 22 and crossbeam 23 are case structure, all are arranged at intervals with a plurality of stiffening plates 51 in it.
The rear end of base 20 is fixedly connected with and adds seat 26, adds seat and is provided with the X-direction pressurized cylinder 27 corresponding with the quantity of X-direction depression bar 8 and position on 26.
As shown in Figure 19 to 22, this pilot system also comprises the reaction frame 63 that can be fixedly connected with the front portion of base 20.Reaction frame 63 comprises base plate 66, is provided with a plurality of bolt connecting holes 67 on base plate 66, so that reaction frame 63 can be bolted to connection with base 20.The rear portion of base plate 66 is provided with riser 68, on riser 68, be provided with can be relative with aspis 9 the first opening 43, the rear portion of riser 68 is fixedly connected with doorframe 52.
All and be provided with the first roller 49 between doorframe 52, two sides up and down of left sliding door 39 and right sliding door 40 all and be provided with the second roller 50 between doorframe 52 at two positions up and down of the front shop front of left sliding door 39 and right sliding door 40.
The second opening 53 is step-like, and doorframe 52 is fixedly connected with the first baffle plate 60 at the endoporus of the second opening 53 close reaction frame 63 1 sides, is fixedly connected with second baffle 61 on the cascaded surface away from reaction frame 63 1 sides.The first roller 49 is arranged between the first baffle plate 60 and doorframe 52, and the second roller 50 arranges between second baffle 61 and doorframe 52.Second baffle 61 is fitted in left sliding door 39 and right sliding door 40 on doorframe 52 simultaneously.The face of cylinder of the first roller 49 contacts with left sliding door 39 or right sliding door 40 with doorframe 52; The face of cylinder of the second roller 50 with doorframe 52 with left sliding door 39 or there is sliding door 40 to contact.
Be respectively arranged with left seal pad 44 and right seal pad 45 on the right opposite of left sliding door 39 and right sliding door 40, outstanding cover 10 ends relative with right sliding door 40 with left sliding door 39 are provided with the second O-ring seal 46.
Between test specimen case 100 and base 20, Rolling base is set, Rolling base comprises the rolling seat 3 be fixedly connected with base 20 and is arranged at the rolling body 65 in the seat 3 that rolls.
In the time of need to doing experiment, operation according to the following steps:
(1) complete moulding and the assembling of test specimen case 100 interior coal petrographys, and the connection of each sensor and circuit; Interior plug 54 is joined with tracheae, and tracheae is connected with gas cylinder with vacuum pump, is provided with T-valve on tracheae;
(2) utilize movable base 300 that the test specimen case is sent into to Rolling base, then the test specimen case is pushed into to preposition;
(3) log-on data acquisition system, gathered the gas pressure in test specimen case before on-test, stress of coal seam and coal and rock temperature;
(4) degassed: as to keep the pressurized cylinder pressure stability of X-direction, Y-direction and Z-direction in predetermined force value, check the impermeability of test specimen case, carry out degassedly with vacuum pump, the degassed time determines according to moulding coal petrography intensity, but at least degassed 24h, to guarantee good degasifying effect;
(5) inflation: keep the pressurized cylinder pressure of X-direction, Y-direction and Z-direction constant, switch three-way valve, fill gas by tracheae to the moulding coal petrography, and 48h is so that the coal petrography adsorption gas reaches equilibrium state in inflation;
(6) outstanding: the left sliding door and the right sliding door that utilize left cylinder and right cylinder to throw open the aspis place are given prominence to; Whole process is carried out the free of discontinuities measurement to gas pressure, stress of coal seam and the coal temperature of test specimen case inside.
In other embodiment, the gas be filled with can be one of methane, carbon dioxide, helium, nitrogen or its mixed gas; Also can carry out the test of rock burst process simulation.
In the present embodiment, the travelling car of described movable base 300 for being fixedly connected with the front end of base 20, the bottom of travelling car is provided with roller, and the rear and front end of bottom is provided with runners.The top of travelling car is provided with rolling body, and the rear of rolling body is provided with hydraulic cylinder, can utilize hydraulic cylinder that the test specimen case is pushed on base 20 from rolling body.
In the present embodiment, four pressurized cylinder of Z-direction are evenly distributed in plane on the test specimen case, can load simultaneously, also can load respectively, and for coal rock layer different pressures in the imitation specimen case, coal seam pressure reaches as high as 10MPa; Four pressurized cylinder of Y-direction are evenly distributed in test specimen case right flank, also can load simultaneously, can load respectively, and for coal rock layer different pressures in the imitation specimen case, coal seam pressure reaches as high as 10MPa; It is to complete the coal seam pressure simulation of 10MPa with a 200T hydraulic cylinder that X-direction loads.Frame 200 is designed to three-dimensional 500T rigidity, the rigidity requirement in the time of can meeting test fully.
In the present embodiment, the acoustic emission positioning system can be carried out the acoustic emission propagation attenuation mechanism research in the dynamic disaster process of colliery, for coal petrography and gas outbursts Prediction provide basis;
The 16CHs SAMOS System Acoustic Emission Testing System of sound source probe access U.S. physical acoustics company (physical acoustics corporation), thereby form the acoustic emission positioning system, the acoustic emission signal that this system will produce the fracture of colliery dynamic disaster Coal During rock mass damage positions, and can realize the visual reproduction of temporal-spatial evolution phenomenon that colliery dynamic disaster Coal During rock mass is broken; The space-time of the acoustic emission signal that the acoustic emission positioning system draws location will for colliery dynamic disaster evolution, particularly Coal and Gas Outburst Cavern forming process and coal and Gas Outburst evolution provide direct data, studied the evolution of the spatial shape of hole, for the research of coal petrography and gas outburst mechanism provides approximate on-the-spot actual parameter support reliably.
In the present embodiment, aspect coal petrography and Gas Outburst simulation, by the overall process gas pressure, measure, can realize vacuumizing, inflate, give prominence to the monitoring of the gas pressure in different coal and rock position in stress-relief process, analyze under the conditions such as different ladder loads, different coal petrography physico mechanical characteristics vacuumize with gas replenishment process in coal and rock in gas pressure distribute, and then obtain vacuumizing with gas replenishment process in the mobile direction of coal-bed gas and speed and with the relation of load distribution, coal petrography physico-mechanical properties; Before analysis coal petrography and Gas Outburst, coal-bed gas pressure changes, thereby analyzes the desorption state of outstanding front gas; Analyze the gas pressure variation of coal seam diverse location in coal petrography and Gas Outburst and the relation of time, for the formation mechanism of being familiar with coal petrography and Gas Outburst hole provides support.
By the overall process temperature survey, the temperature variation in the time of can obtaining vacuumizing gas desorption and inflation in the gas adsorption process and the relation between each factor; Analyze temperature variation characteristic outstanding and the front coal and rock of rock burst, for dynamic disaster prediction in colliery provides basis; Explore the variation that the front and back coal temperature occurs the colliery dynamic disaster; On the basis of above analysis, inquire into the action rule of temperature to the colliery dynamic disaster.
By omnidistance coal and rock stress monitoring, but under the analysis project disturbance distribution of coal and rock stress and and each factor between relation; Analyzing the stress of the disrumpent feelings front coal body of coal and rock concentrates situation and the disrumpent feelings rear concentrated stress of coal and rock toward the interior shifting rule.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in the determined protection domain by claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (8)
1. more than one kind the large-scale imitation specimen case of coupling colliery dynamic disaster, is characterized in that: comprise casing (1); The top of described casing (1) has been bolted to connection cover plate (4); Be provided with at least three Z-direction depression bar covers (2) on described cover plate (4); Be provided with Z-direction depression bar (3) in each Z-direction depression bar cover (2); Be fixedly connected with Z-direction pressing plate (11) on described Z-direction depression bar (3); Described Z-direction pressing plate (11) is positioned at described casing (1);
Be provided with at least three Y-direction depression bar covers (5) on the right boxboard of described casing (1); Be provided with Y-direction depression bar (6) in each Y-direction depression bar cover (5); Be fixedly connected with Y-direction pressing plate (12) on described Y-direction depression bar (6); Described Y-direction pressing plate (12) is positioned at described casing (1);
Be provided with at least one X-direction depression bar cover (7) on the rearing-box plate of described casing (1); Be provided with X-direction depression bar (8) in each X-direction depression bar cover (7); Be fixedly connected with X-direction pressing plate (13) on described X-direction depression bar (8); Described X-direction pressing plate (13) is positioned at described casing (1);
The front boxboard of described casing (1) is provided with aspis (9);
The bottom of described casing (1) is provided with air permeable steel plate (16) and air flue (17); Described air permeable steel plate (16) covers on described air flue (17); The import of described air flue (17) is provided with interior plug (54);
The outside interval of the left boxboard of described casing (1) is fixedly connected with the first backing plate (28); Described left boxboard is provided with sensor interface (18) between the interval of each the first backing plate (28); Be provided with sensor connector (19) in described sensor interface (18); Be provided with probe mounting hole (30) on the boxboard of described casing (1); Described probe mounting hole (30) is welded with plug (31) near inner chamber one end of described casing (1), away from inner chamber one end of described casing (1), is combined with the first bolt (32); The arranged outside sound source probe (33) of described plug (31); Be pressed with spring (34) between the end face of described sound source probe (33) and described the first bolt (32); Be provided with the first axially extending bore (35) on described the first bolt (32); Be combined with the second bolt (36) in described the first axially extending bore (35); Be provided with the second axially extending bore (37) on described the second bolt (36); The external wire (62) of described sound source probe (33) picks out from described the first axially extending bore (35) and the second axially extending bore (37).
2. many coupling colliery dynamic disaster large scale mock up test systems as claimed in claim 1, it is characterized in that: the top of the left boxboard of described casing (1), right boxboard, front boxboard and rearing-box plate is staircase structure, described staircase structure is greater than the height away from described casing (1) inner chamber near the height of described casing (1) inner chamber, thereby makes the top of described casing (1) form boss (48); Described cover plate (4) fastens with described casing (1); Locate at described boss (48), between described cover plate (4) and described casing (1), be provided with sealing gasket (49); Described cover plate (4) is located to be bolted to connection at described boss (48) with described casing (1).
3. many large-scale imitation specimen casees of coupling colliery dynamic disaster as claimed in claim 1, is characterized in that: be bolted to connection outstanding cover (10) in described aspis (9); Be provided with the first O-ring seal (47) between described outstanding cover (10) and described front boxboard; Described the second O-ring seal (46) is arranged on the end that described outstanding cover (10) is relative with right sliding door (40) with described left sliding door (39).
4. as claim 1 or 2 or 3 described many large-scale imitation specimen casees of coupling colliery dynamic disaster, it is characterized in that: described the first axially extending bore (35) comprises taper hole (35a); The aperture of described taper hole (35a) diminishes gradually along the direction near described casing (1) inner chamber; Be positioned at described taper hole (35a) in described the first axially extending bore (35) and locate to be provided with cutting ferrule (38); Described the second bolt (36) is arranged on the outside of described cutting ferrule (38); The front end of described cutting ferrule (38) is coniform, and its tapering is less than the tapering of described taper hole (35a); The front end edge of described cutting ferrule (38) axially is provided with at least two open slots (38a); (38a) is uniform at circumferencial direction for described open slot.
5. many large-scale imitation specimen casees of coupling colliery dynamic disaster as claimed in claim 1, is characterized in that: be fixedly connected with four described Z-direction depression bar covers (2) on described cover plate (4); The front end of described casing (1) is provided with four described Y-direction depression bar covers (5); The left end of described casing (1) is provided with a described X-direction depression bar cover (7).
6. as claim 1 or 2 or 3 described many large-scale imitation specimen casees of coupling colliery dynamic disaster, it is characterized in that: the corner of the Z-direction pressing plate (11) that described X-direction pressing plate (13) is adjacent is provided with the first anti-interference plate (14); The corner of the Y-direction pressing plate (12) that described X-direction pressing plate (13) is adjacent is provided with the second anti-interference plate (59); The corner of the Z-direction pressing plate (11) that each described Y-direction pressing plate (12) is adjacent is provided with the 3rd anti-interference plate (15).
7. as claim 1 or 2 or 3 described many large-scale imitation specimen casees of coupling colliery dynamic disaster, it is characterized in that: be arranged with the described sensor interface of three row (18) on the left boxboard of described casing (1) in parallel; On the close direction of described aspis (9), the distribution density of described sensor interface (18) strengthens gradually.
8. many coupling colliery dynamic disaster large-scale imitation specimen casees as claimed in claim 7, it is characterized in that: described sensor interface (18) is provided with 18 at every row.
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| CN110308259A (en) * | 2019-07-02 | 2019-10-08 | 中国矿业大学 | A kind of multi- scenarios method pressure break-displacement cooperative reinforcing gas drainage experimental rig |
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| CN101226183B (en) * | 2008-01-22 | 2011-09-07 | 重庆大学 | Projecting simulator stand for coal and firedamp |
| CN101354355B (en) * | 2008-08-22 | 2010-10-20 | 重庆大学 | Fine observation mechanical test system containing gas coal rock |
| CN201285392Y (en) * | 2008-11-14 | 2009-08-05 | 重庆大学 | Mold for coal and firedamp projecting simulator experiment |
| CN201765159U (en) * | 2010-09-16 | 2011-03-16 | 重庆大学 | Gas-contained coal-rock meso shearing test device |
| CN201897602U (en) * | 2010-11-17 | 2011-07-13 | 山东电力集团公司超高压公司 | Special arranging tool for GIS (global information system) local discharge ultrasonic testing sensor |
| CN202140403U (en) * | 2011-07-12 | 2012-02-08 | 航天精工有限公司 | Clamping sleeve thread connection component capable of preventing looseness and seizure |
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| CN110308259A (en) * | 2019-07-02 | 2019-10-08 | 中国矿业大学 | A kind of multi- scenarios method pressure break-displacement cooperative reinforcing gas drainage experimental rig |
| CN110308259B (en) * | 2019-07-02 | 2021-02-02 | 中国矿业大学 | Multi-field coupling fracturing-displacement cooperative strengthening gas extraction test device |
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