CN102621230A - Multi-field-coupled coal mine dynamic disaster large-scale simulation testing method - Google Patents
Multi-field-coupled coal mine dynamic disaster large-scale simulation testing method Download PDFInfo
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- CN102621230A CN102621230A CN2012100823298A CN201210082329A CN102621230A CN 102621230 A CN102621230 A CN 102621230A CN 2012100823298 A CN2012100823298 A CN 2012100823298A CN 201210082329 A CN201210082329 A CN 201210082329A CN 102621230 A CN102621230 A CN 102621230A
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Abstract
The invention discloses a multi-field-coupled coal mine dynamic disaster large-scale simulation testing method, which includes the following steps: (1) completing formation and assembly of coal and rock inside a test piece box, connection of sensors and circuits and connection of a gas circuit; (2) placing the test piece box in a pressurizing system at a preset position, pressurizing the test piece box in the X-axis, the Y-axis and the Z-axis; (3) starting a data acquisition system; (4) degassing; (5) charging gas; and (6) outbursting. The method disclosed by the invention can monitor coal and rock gas pressure, ground stress, temperature variation of a coal and rock body as well as space-time evolution law of an acoustic emission signal of the coal and rock body before and after the occurrence of a coal mine dynamic disaster, and achieves the purposes of studying internal relations among a stress field, a seepage field, a temperature field and a fracture field as well as studying mutually coupled action mechanism thereof during the coal mine dynamic disaster, thereby revealing the occurrence mechanism of the coal mine dynamic disaster and providing theoretic base for prevention and control of the coal mine dynamic disaster.
Description
Technical field
The present invention relates to a kind of test method of simulating colliery dynamic disaster process under many coupling mechanism.
Background technology
The colliery dynamic disaster is in the process of coal mining; Under high-stress state, gather the coal and rock of great number of elastic ability; Destroy under certain conditions suddenly, inbreak or dish out, energy is discharged suddenly, present the obviously extremely complicated dynamic phenomenon of dynamic effect such as the sound, vibrations and blast; It mainly contains that coal petrography and gas are outstanding, 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 of dynamic disaster predicted and holds; Action pathway that it is inherent and mechanism also thoroughly are not familiar with by human institute; And along with the increase day by day of the coal mining degree of depth, colliery dynamic disaster occurrence frequency is increasingly high, and intensity is also increasing; The mine motive force disaster cause calamity mechanism, trigger condition, evolution rule and becoming increasingly complex of presentation attributes; At present, also lack systematic study, therefore strengthen extremely important the research of colliery dynamic disaster mechanism, prediction and prophylactico-therapeutic measures thereof to the breeding-take place of dynamic disaster under the Mining in Deep-lying Conditions-evolution mechanism, basic science problem and early warning Preventing Countermeasures.Coal petrography and gas outburst mechanism aspect; The scholar admits the combined action hypothesis mostly; It thinks that it is by the coefficient result of the physico-mechanical properties of terrestrial stress, gas, coal that coal petrography and gas are given prominence to; But how on earth still very unclear the percentage contribution of three in coal petrography and the outstanding process of gas be; And gas pressure, coal seam stress and the coal and rock temperature temporal and spatial evolution before and after coal and gas are outstanding is still very undistinct, so coal petrography is still indeterminate with gas outburst mechanism, and a difficult problem has been made in these preventing and controlling to the colliery dynamic disaster.
In the prior art, mainly there is following problem in the test unit of simulation colliery dynamic disaster: the moulded dimension that (1) is adopted is less, and the evolution of simulation dynamic disaster has certain space constraint; (2) automaticity of device installation 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 be near field condition; (4) opening speed of aspis baffle plate is slow or have certain delay, has influenced the outstanding time and intensity of coal and gas to a certain extent, so the realistic simulation situation is given prominence to true down-hole coal and gas and still had difference; (5) terrestrial stress of simulation can not simulate the face of adopting fully because the stress raisers that mining activity causes; (6) the coal and rock parameter acquisition of outstanding mould inside is not enough, and most cases is only to have gathered temperature and gas pressure, and the collection point is comparatively single, can not analyze and research to coal and rock before and after the dynamic disaster of the colliery inner stress and the temperature rule of development.
Therefore those skilled in the art are devoted to develop a kind of pilot system and the test method that can accurately simulate colliery dynamic disaster process, with scientific research colliery dynamic disaster mechanism.
Summary of the invention
Because the above-mentioned defective of prior art, technical matters to be solved by this invention provides a kind of pilot system and the test method that can accurately simulate colliery dynamic disaster process.
For realizing the purpose of the present invention's first aspect, the invention provides a kind of many coupling colliery dynamic disaster large scale mock up test systems, comprise frame and place the test specimen case on the said frame; Said test specimen case comprises casing; The top of said casing is connected with cover plate through bolt; Said cover plate is provided with at least three Z to the depression bar cover; Each Z is provided with Z to depression bar in the depression bar cover; Said Z is fixedly connected with Z to pressing plate on depression bar; Said Z is positioned at said casing to pressing plate; The right boxboard of said casing is provided with at least three Y to the depression bar cover; Each Y is provided with Y to depression bar in the depression bar cover; Said Y is fixedly connected with Y to pressing plate on depression bar; Said Y is positioned at said casing to pressing plate; The rearing-box plate of said casing is provided with at least one X to the depression bar cover; Each X is provided with X to depression bar in the depression bar cover; Said X is fixedly connected with X to pressing plate on depression bar; Said X is positioned at said casing to pressing plate; The preceding boxboard of said casing is provided with aspis; The bottom of said casing is provided with ventilative steel plate and air flue; Said ventilative steel plate covers on the said air flue; The import of said air flue is provided with interior plug; The outside fixed interval of the left boxboard of said casing is connected with first backing plate; Said left boxboard is provided with sensor interface between the interval of each first backing plate; Be provided with sensor connector in the said sensor interface; Said frame comprises base; Be fixed with left column and right column on the said base; The upper end of said left column and right column is fixed with crossbeam; Said test specimen case places on the said base; Said crossbeam is provided with said Z to the quantity of depression bar and the corresponding Z in position to pressurized cylinder; Said right column is provided with said Y to depression bar quantity and the corresponding Y in position to pressurized cylinder; Said left column is provided with and corresponding second backing plate in the said first backing plate position; The rear end of said base is fixedly connected with and adds seat; The said seat that adds is provided with said X to the quantity of depression bar and the corresponding X in position to pressurized cylinder; This pilot system also comprises the reaction frame that can be fixedly connected with the front portion of said base; Said reaction frame comprises base plate; Said base plate is provided with a plurality of bolt connecting holes; The rear portion of said base plate is provided with riser; Said riser be provided with can be relative with said aspis first opening; The rear portion of said riser is fixedly connected with doorframe; Said doorframe is provided with second opening relative with said first opening; But corresponding said second opening part of said doorframe is provided with the left sliding door and the right sliding door of said aspis of shutoff and said second opening; Said left sliding door is connected with left cylinder; Said right sliding door is connected with right cylinder; Two positions up and down of the preceding shop front of said left sliding door and right sliding door all and be provided with first roller between the said doorframe; Two sides up and down of said left sliding door and right sliding door all and be provided with second roller between the said doorframe; Be respectively arranged with left seal pad and right seal pad on the right opposite of said left sliding door and right sliding door; The end of corresponding said left sliding door of said test specimen case and right sliding door is provided with second O-ring seal.
For improving the sealing of test specimen case; The top of the left boxboard of said casing, right boxboard, preceding boxboard and rearing-box plate is a staircase structure; Said staircase structure near the height of said cabinets cavity greater than height away from said cabinets cavity, thereby make the top of said casing constitute boss; Said cover plate and said casing fasten; At said boss place, be provided with sealing gasket between said cover plate and the said casing; Said cover plate is connected through bolt at said boss place with said casing.
For adapting to the different dimensional requirement of aspis, be connected with outstanding cover through bolt in the said aspis; Be provided with first O-ring seal between said outstanding cover and the said preceding boxboard; Said second O-ring seal is arranged on the said outstanding cover end relative with right sliding door with said left sliding door.
For obtaining coal petrography and gas outburst hole forming process and coal petrography and gas prominent development process direct data are provided; Studied the temporal evolution rule of the spatial shape of hole; The visual reproduction of temporal-spatial evolution phenomenon that realization is broken to coal and rock in coal petrography and the outstanding process of gas; The spatial shape of the inner acoustic emission of research coal and rock, the boxboard of said casing is provided with the probe mounting hole; Said probe mounting hole is welded with plug near inner chamber one end of said casing, is combined with first bolt away from inner chamber one end of said casing; The arranged outside of said plug has the sound source probe; Be pressed with spring between the end face of said sound source probe and said first bolt; Said first bolt is provided with first axially extending bore; Be combined with second bolt in said first axially extending bore; Said second bolt is provided with second axially extending bore; The external wire of said sound source probe picks out from said first axially extending bore and second axially extending bore.
For improving the reliability of sound source probe, said first axially extending bore comprises taper hole; The aperture of said taper hole diminishes along the direction near said cabinets cavity gradually; Be positioned at said taper hole place in said first axially extending bore and be provided with cutting ferrule; Said second bolt is arranged on the outside of said cutting ferrule; The front end of said cutting ferrule is coniform, and its tapering is less than the tapering of said taper hole; The front end edge of said cutting ferrule axially is provided with at least two open slots; Said open slot is uniformly distributed with at circumferencial direction.
Be placed into for ease of the test specimen case on the base of frame, between said test specimen case and the said base Rolling base be set; Said Rolling base comprises rolling seat that is fixedly connected with said base and the rolling body that is arranged in the said seat that rolls.
Complex distributions phenomenon for the coal seam stress during different top board operational phase in the real simulated down-hole mining process more is fixedly connected with four said Z to the depression bar cover on the said cover plate; The front end of said casing is provided with four said Y to the depression bar cover; The left end of said casing is provided with a said X to the depression bar cover.
For avoiding interfering each other between the three-dimensional loading force, said X is provided with the first anti-interference plate to the Z that pressing plate is adjacent to the corner of pressing plate; Said X is provided with the second anti-interference plate to the Y that pressing plate is adjacent to the corner of pressing plate; Each said Y is provided with the 3rd anti-interference plate to the Z that pressing plate is adjacent to the corner of pressing plate.
For the inner parameter of coal and rock before and after the collection of coal mine dynamic disaster more accurately, be arranged with the said sensor interface of triplex row on the left boxboard of said casing in parallel; On the direction near said aspis, the distribution density of said sensor interface strengthens gradually.
Preferable, said sensor interface is provided with 18 at every row.
For further improving the load-bearing capacity of reaction frame, the left side of said base plate is fixed with the first left stiffening plate and the second left stiffening plate; The said first left stiffening plate and the second left stiffening plate and said riser form right angle triangular structure; The right side of said base plate is fixed with the first right stiffening plate and the second right stiffening plate; The said first right stiffening plate and the second right stiffening plate and said riser form right angle triangular structure.
For realizing the purpose of the present invention's second aspect; The invention provides a kind of many coupling colliery dynamic disaster large scale mock up test methods; May further comprise the steps: the moulding of coal petrography and being connected of assembling, each sensor and circuit in the test specimen case are accomplished in (1), and the connection of gas circuit; (2) the test specimen case is sent into the compression system preposition, and to the test specimen case carry out X to, Y to Z to pressurization; (3) degassing: keep X to, Y to Z to the pressurized cylinder pressure stability in predetermined force value, the impermeability of inspection test specimen case outgases more than the 24h with vacuum pump; (4) inflation: keep X to, Y to Z to pressurized cylinder pressure constant, the moulding coal petrography fill gas body in the test specimen case, 48h is so that coal petrography adsorbed gas reaches equilibrium state in inflation; (5) log-on data acquisition system is gathered the gaseous tension in the test specimen case before on-test, coal seam stress and coal and rock temperature; (6) outstanding: the aspis of opening the test specimen case makes the coal petrography in the test specimen case outstanding; Whole process is carried out free of discontinuities to test specimen case gas inside pressure, coal seam stress and coal and rock temperature and is measured.
Preferable, in the step (4), the gas that charges into is one of methane, carbon dioxide, helium, nitrogen or its two or more mixed gas.
Preferable, in the step (2), Z loads to adopting four pressurized cylinder to be evenly distributed in plane on the test specimen case at the same time or separately; Y loads to adopting four pressurized cylinder to be evenly distributed in plane on the test specimen case at the same time or separately; X adopts a T hydraulic cylinder to accomplish to loading.
Preferable, in the step (2), the test specimen case is carried out Z to loading, make coal seam pressure reach 10MPa; The test specimen case is carried out Y to loading, make coal seam pressure reach 10MPa; X is to adopt the 200T hydraulic cylinder to loading, makes coal seam pressure reach 10MPa.
Preferable, in the step (5), coal and rock is destroyed the acoustic signals of fracture generation and gathered, to realize accurate space-time location the coal petrography breakaway poing.
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 takes place the colliery dynamic disaster; Reach inner link and the purpose of the mechanism of action that in the dynamic disaster process of colliery, intercouples thereof between research stress field, seepage field, temperature field and the field, crack; Thereby disclose the mechanism that the colliery dynamic disaster takes place to a deeper level, for dynamic disaster control in colliery is provided fundamental basis.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention.
Fig. 2 is the plan structure synoptic diagram of Fig. 1.
Fig. 3 is the left TV structure synoptic diagram of Fig. 1.
Fig. 4 is the partial enlarged drawing at A place among Fig. 1.
Fig. 5 is the structural representation of test specimen case in the embodiment of the invention.
Fig. 6 is the plan structure synoptic diagram of Fig. 5.
Fig. 7 is the left TV structure synoptic diagram of Fig. 5.
Fig. 8 is the partial enlarged drawing at I place among Fig. 5.
Fig. 9 is the partial enlarged drawing at II place among Fig. 5.
Figure 10 is the partial enlarged drawing at III place among Fig. 5.
Figure 11 is the partial enlarged drawing at IV place among Fig. 5.
Figure 12 is a sound source probe mounting structural representation in the embodiment of the invention.
Figure 13 is the partial enlarged drawing at V place among 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 synoptic diagram of Figure 16.
Figure 18 is the left TV structure synoptic 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 synoptic diagram of Figure 19.
Figure 21 is the left TV structure synoptic diagram of Figure 19.
Figure 22 is the partial enlarged drawing at VI place among Figure 19.
Embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is described further:
To shown in Figure 4, a kind of many coupling colliery dynamic disaster large scale mock up test systems comprise frame 200 and place the test specimen case 100 on the frame 200 like Fig. 1.
To shown in Figure 11, cover plate 4 fastens with casing 1 like Fig. 5.At boss 48 places, be provided with sealing gasket 49 between cover plate 4 and the casing 1, and cover plate 4 is connected through bolt at boss 48 places with casing 1.
In the present embodiment, be fixedly connected with four Z on the cover plate 4 to depression bar cover 2, each Z is provided with Z to depression bar 3 in depression bar cover 2, and Z is fixedly connected with Z to pressing plate 11 on depression bar 3, and Z is positioned at casing 1 to pressing plate 11.In other embodiments, the Z that also can be fixedly connected other quantity more than three on the cover plate 4 is to depression bar cover 2, as 3,5,6 etc., to reach essentially identical technique effect.
The right boxboard of casing 1 is provided with four Y to depression bar cover 5, and each Y is provided with Y to depression bar 6 in depression bar cover 5, and Y is fixedly connected with Y to pressing plate 12 on depression bar 6, and Y is positioned at casing 1 to pressing plate 12.In other embodiments, the Y that also can be fixedly connected other quantity more than three on the right boxboard is to depression bar cover 5, as 3,5,6 etc., to reach essentially identical technique effect.
The rearing-box plate of casing 1 is provided with an X to depression bar cover 7, and each X is provided with X to depression bar 8 in depression bar cover 7, and X is fixedly connected with X to pressing plate 13 on depression bar 8, and X is positioned at casing 1 to pressing plate 13.In other embodiments, the X that also can be fixedly connected other quantity on the rearing-box plate is to depression bar cover 7, as 2,3,4 etc., to reach essentially identical technique effect.
X is provided with the first anti-interference plate 14 to the Z that pressing plate 13 is adjacent to the corner of pressing plate 11; X is provided with the second anti-interference plate 59 to the Y that pressing plate 13 is adjacent to the corner of pressing plate 12, and each Y is provided with the 3rd anti-interference plate 15 to the Z that pressing plate 12 is adjacent to the corner of pressing plate 11.
In the present embodiment; All be disposed with F4 bronze compound substance guidance tape 55 between the depression bar of three directions cover and the depression bar, the ST oblique crank Z does not have bone dust ring 57 with combination sealing box 56, J-shaped; Be provided with sealing gasket 58 between depression bar cover and casing or the cover plate; Combine other hermetically-sealed constructions in the present embodiment simultaneously, make the impermeability of test specimen case reach the standard of 6MP; Simultaneously, friction force was very little when this hermetically-sealed construction made loading, and easy for installation.
The preceding boxboard of casing 1 is provided with aspis 9, is connected with outstanding cover 10 through bolt in the aspis 9, is provided with first O-ring seal 47 between outstanding cover 10 and the preceding boxboard.The highlight of test specimen case is designed to dismountable structure, therefore can satisfies different testing requirementss through the outstanding cover 10 of changing different inner diameters.
The bottom of casing 1 is provided with ventilative steel plate 16 and air flue 17, and ventilative steel plate 16 covers on the air flue 17.The import of air flue 17 is provided with interior plug 54, and plug 54 can be connected with external tracheae in this.
The outside fixed interval of the left boxboard of casing 1 is connected with four lines first backing plate 28, and left boxboard is provided with delegation's sensor interface 18 between the interval of each first backing plate 28, be provided with sensor connector 19 in the sensor interface 18, and this sensor connector 19 is an Aviation Connector.The quantity of every line sensor interface 18 is 18, and on the direction near aspis 9, the distribution density of sensor interface 18 strengthens gradually.
In the present embodiment, each sensor connector 19 place can insert methane gas pressure transducer, coal seam pressure transducer and coal seam temperature sensor simultaneously.Wherein, adopt 24 methane gas pressure transducers to measure the pressure and the concentration of methane gas, specification is 10MPa, measuring accuracy ± 1%; 24 coal seam pressure transducers, specification are 10MPa, measuring accuracy ± 1%; 12 coal seam temperature sensors, specification are 0～100 ℃, measuring accuracy ± 1 ℃.Sensor is connected with 88 channel data collection plates, and 8 channel data collection plates communicate through hub and computer system, thereby the composition data acquisition system realizes collection, transmission, demonstration and the preservation of data.
Each sensor can be uniformly distributed with on the test specimen case, also can regulate three kinds of sensor measuring positions in the test specimen case to satisfy the actual test request in the different perturbation process.General, can comparatively intensive sensor be set in the front portion of test specimen case, to measure outstanding related data more accurately.
Front portion on the left and right boxboard of casing 1 is provided with respectively has four probe mounting holes 30, and the rear portion is provided with two probe mounting holes 30, the rectangular arrangement of each mounting hole of popping one's head in.
To shown in Figure 15, probe mounting hole 30 is welded with plug 31 near inner chamber one end of casing 1 like Figure 12, is combined with first bolt 32 away from inner chamber one end of casing 1.The arranged outside of plug 31 has sound source probe 33, is pressed with spring 34 between the end face of sound source probe 33 and first bolt 32.First bolt 32 is provided with first axially extending bore 35; Be combined with second bolt 36 in first axially extending bore 35; Second bolt 36 is provided with second axially extending bore 37; Be provided with steel pipe 64 in second axially extending bore 37, the steel pipe 64 of external wire 62 from first axially extending bore 35 and second axially extending bore 37 of sound source probe 33 picks out.
First axially extending bore 35 comprises taper hole 35a, and the aperture of taper hole 35a diminishes along the direction near casing 1 inner chamber gradually.Be positioned at taper hole 35a place in 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 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 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 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 uniformly distributed with at circumferencial direction.
Shown in Figure 16 to 18, frame 200 comprises base 20, is fixed with left column 21 and right column 22 on the 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 26 and is provided with X to the quantity of depression bar 8 and the corresponding X in position to pressurized cylinder 27.
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, and base plate 66 is provided with a plurality of bolt connecting holes 67, so that reaction frame 63 can be connected through bolt with base 20.The rear portion of base plate 66 is provided with riser 68, riser 68 be provided with can be relative with aspis 9 first opening 43, the rear portion of riser 68 is fixedly connected with doorframe 52.
The left side of base plate 66 is fixed with the first left stiffening plate 68 and the second left stiffening plate 69, and the right side of base plate 66 is fixed with the first right stiffening plate 70 and the second right stiffening plate 71.The first left stiffening plate 68 and the second left stiffening plate 69 and riser 67 form right angle triangular structures; The first right stiffening plate 70 and the second right stiffening plate 71 and riser 67 form right angle triangular structures.
Two positions up and down of the preceding shop front of a left side sliding door 39 and right sliding door 40 all and be provided with first roller 49 between the doorframe 52, two sides up and down of left sliding door 39 and right sliding door 40 are all and be provided with second roller 50 between the doorframe 52.
Be respectively arranged with left seal pad 44 and right seal pad 45 on the right opposite of left side sliding door 39 and right sliding door 40, outstanding cover 10 is provided with second O-ring seal 46 with left sliding door 39 and right sliding door 40 relative ends.
Between test specimen case 100 and the base 20 Rolling base is set, Rolling base comprises rolling seat 3 that is fixedly connected with base 20 and the rolling body 65 that is arranged in the seat 3 that rolls.
In the time of need doing experiment, operation according to the following steps:
(1) being connected of the moulding and the assembling of completion test specimen case 100 interior coal petrographys, and each sensor and circuit; Interior plug 54 is joined with tracheae, and tracheae is connected with gas cylinder with vacuum pump, and tracheae is provided with T-valve;
(2) utilize movable base 300 that the test specimen case is sent into Rolling base, then the test specimen case is pushed into preposition;
(3) log-on data acquisition system is gathered the gas pressure in the test specimen case before on-test, coal seam stress and coal and rock temperature;
(4) degassing: keep X to, Y to Z to the pressurized cylinder pressure stability in predetermined force value; The impermeability of inspection test specimen case outgases with vacuum pump, and the degassing time decides according to moulding coal petrography intensity; But the 24h that outgases at least is to guarantee good degasifying effect;
(5) inflation: keep X to, Y to Z to pressurized cylinder pressure constant, switch three-way valve fills gas through tracheae to the moulding coal petrography, 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 free of discontinuities to test specimen case inner gas pressure, coal seam stress and coal and rock temperature and is measured.
In other embodiment, the gas that charges into 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, said movable base 300 is the travelling car that can be fixedly connected with the front end of base 20, and 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, and hydraulic cylinder capable of using pushes the test specimen case on the base 20 from rolling body.
In the present embodiment, Z to four pressurized cylinder be evenly distributed in plane on the test specimen case, can load simultaneously, also can load respectively, be used for coal rock layer different pressures in the imitation specimen case, coal seam pressure reaches as high as 10MPa; Y to four pressurized cylinder be evenly distributed in test specimen case right flank, also can load simultaneously, can load respectively, be used for coal rock layer different pressures in the imitation specimen case, coal seam pressure reaches as high as 10MPa; X is the coal seam pressure simulation of accomplishing 10MPa with a 200T hydraulic cylinder to loading.Frame 200 is designed to three-dimensional 500T rigidity, the rigidity requirement in the time of can satisfying 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 and gas outbursts Prediction provide the basis;
The sound source probe inserts the 16CHs SAMOS System acoustic emission test system of U.S. physical acoustics company (physical acoustics corporation); Thereby constitute the acoustic emission positioning system; This system will destroy the acoustic emission signal that produces that ruptures to coal and rock in the dynamic disaster process of colliery and position, and can realize the visual reproduction of temporal-spatial evolution phenomenon that coal and rock in the dynamic disaster process of colliery is broken; The space-time of the acoustic emission signal that the acoustic emission positioning system draws location will particularly coal and gas outburst hole forming process and coal and gas prominent development process provide direct data for colliery dynamic disaster evolution; Studied the temporal evolution rule of the spatial shape of hole, for the research of coal and gas outburst mechanism provides approximate reliably on-the-spot actual parameter support.
In the present embodiment; Aspect coal and the outstanding simulation of gas; Measure through the overall process gas pressure; Can realize vacuumizing, inflate, give prominence to the monitoring of the gas pressure in the different coal and rock position in the stress-relief process; Analyze vacuumize under the conditions such as different ladder loads, different coal petrography physico mechanical characteristics with gas replenishment process in coal and rock in gas pressure distribute, and then obtain vacuumizing with gas replenishment process in the direction that flows of coal-bed gas and speed and with the relation of load distribution, coal petrography physico-mechanical properties; Analyze coal and gas and give prominence to preceding coal-bed gas pressure variation, thereby analyze the desorption state of outstanding preceding gas; The gas pressure of analyzing coal seam diverse location in the outstanding process of coal and gas changes and time relation, for the formation mechanism of being familiar with coal and gas outburst hole provides support.
Through the overall process temperature survey, 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 preceding coal and rock of rock burst, for dynamic disaster prediction in colliery provides the basis; Explore the colliery dynamic disaster front and back coal and rock variation of temperature takes place; On the basis of above analysis, inquire into the action rule of temperature to the colliery dynamic disaster.
Through 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 preceding coal and rock of coal and rock concentrates situation and the disrumpent feelings back of coal and rock concentrated stress toward inner metastatic rule.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art need not creative work and just can design according to the present invention make many modifications and variation.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 through the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (5)
1. more than one kind coupling colliery dynamic disaster large scale mock up test method is characterized in that: may further comprise the steps:
(1) accomplish the moulding of coal petrography and being connected of assembling, each sensor and circuit in the test specimen case, and the connection of gas circuit;
(2) the test specimen case is sent into the compression system preposition, and to the test specimen case carry out X to, Y to Z to pressurization;
(3) log-on data acquisition system is gathered the gaseous tension in the test specimen case before on-test, coal seam stress and coal and rock temperature;
(4) degassing: keep X to, Y to Z to the pressurized cylinder pressure stability in predetermined force value, the impermeability of inspection test specimen case outgases more than the 24h with vacuum pump;
(5) inflation: keep X to, Y to Z to pressurized cylinder pressure constant, the moulding coal petrography fill gas body in the test specimen case, 48h is so that coal petrography adsorbed gas reaches equilibrium state in inflation;
(6) outstanding: the aspis of opening the test specimen case makes the coal petrography in the test specimen case outstanding; Whole process is carried out free of discontinuities to test specimen case gas inside pressure, coal seam stress and coal and rock temperature and is measured.
2. many coupling colliery dynamic disaster large scale mock up test methods as claimed in claim 1, it is characterized in that: in the step (4), the gas that charges into is one of methane, carbon dioxide, helium, nitrogen or its two or more mixed gas.
3. many coupling colliery dynamic disaster large scale mock up test methods as claimed in claim 2, it is characterized in that: in the step (2), Z loads to adopting four pressurized cylinder to be evenly distributed in plane on the test specimen case at the same time or separately; Y loads to adopting four pressurized cylinder to be evenly distributed in plane on the test specimen case at the same time or separately; X adopts a T hydraulic cylinder to accomplish to loading.
4. many coupling colliery dynamic disaster large scale mock up test methods as claimed in claim 3 is characterized in that: in the step (2), the test specimen case is carried out Z to loading, make coal seam pressure reach 10MPa; The test specimen case is carried out Y to loading, make coal seam pressure reach 10MPa; X is to adopt the 200T hydraulic cylinder to loading, makes coal seam pressure reach 10MPa.
5. like arbitrary described many coupling colliery dynamic disaster large scale mock up test methods of claim 1 to 4, it is characterized in that: in the step (5), coal and rock is destroyed the acoustic signals of fracture generation and gathered, to realize accurate space-time location to the coal petrography breakaway poing.
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