CN106526094B - A kind of coal and gas prominent analogue experiment installation and experimental method - Google Patents

A kind of coal and gas prominent analogue experiment installation and experimental method Download PDF

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Publication number
CN106526094B
CN106526094B CN201611230222.8A CN201611230222A CN106526094B CN 106526094 B CN106526094 B CN 106526094B CN 201611230222 A CN201611230222 A CN 201611230222A CN 106526094 B CN106526094 B CN 106526094B
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CN
China
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gas
prominent
coal
hydraulic
hydraulic cylinder
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CN201611230222.8A
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Chinese (zh)
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CN106526094A (en
Inventor
张天军
尚宏波
李树刚
包若羽
马腾
宋爽
张磊
羽玥
董晓刚
蒋兴科
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西安科技大学
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00

Abstract

The invention discloses a kind of coal and gas prominent analogue experiment installations, including crustal stress simulated loading system, gas pressure simulated loading system, acoustic emission system, prominent babinet and computer;The crustal stress simulated loading system includes electronic universal tester, the first hydraulic cylinder and the second hydraulic cylinder, it is placed on the pedestal of electronic universal tester in the prominent babinet pair, the electronic universal tester, the first hydraulic cylinder and the second hydraulic cylinder are connected with computer.In addition, the invention also discloses the methods for carrying out coal and gas prominent simulated experiment using the device.The device of the invention is capable of providing stable pressure, realize three-dimensional on-load pressure, and critical pressure value when accurately can record prominent when coal sample occurs prominent, it can reflect the changing rule of the energy and pressure before and after coal and gas prominent in real time by the data transmission to computer of acquisition.

Description

A kind of coal and gas prominent analogue experiment installation and experimental method

Technical field

The invention belongs to coal and gas prominent simulating experiment technique fields, and in particular to a kind of coal and gas prominent simulation is real Experiment device and experimental method.

Background technology

With being continuously increased for coal mining depth, under high-ground stress and gas pressure effect, more and more mines Severe coal and gas prominent problem will be faced, the safety in production of mine is caused great harm.Coal and gas prominent is one Kind extremely complex mining dynamic phenomena, occur to be influenced by the physico-mechanical properties of crustal stress, gas pressure and coal petrography and It restricts, and the research at present about coal and gas prominent mechanism is not yet clear.Therefore, lot of domestic and foreign scholar uses coal and gas Prominent simulator has carried out a large amount of simulated experiment, has deepened understanding of the people to coal and gas prominent to a certain extent, But with the proposition of coal and gas prominent mechanical function mechanism, that there are sizes is small for existing simulator, load dimension is few, inflation It pressure bottom and is unable to accurate recording and protrudes the shortcomings of front and back energy is with prominent whole process, it is prominent with gas cannot fully to disclose coal Changing rule during going out;Especially existing simulator aspis needs to open manually, opens aspis speed manually It crosses slow-motion and influences the time of coal and gas prominent and the changing rule of energy;In addition, the loading system of existing apparatus is mostly not Stable on-load pressure can be provided, there is certain difficulty to finding coal and gas prominent critical pressure value in this way.Therefore, it is necessary to A kind of experimental provision, can simulate that coal sample size is big, load dimension is more, the big requirement of the blowing pressure, while can clearly see Examine and record the destruction situation and energy variation rule of coal sample during coal and gas prominent.

Invention content

It is prominent with gas technical problem to be solved by the present invention lies in a kind of coal in view of the above shortcomings of the prior art, is provided Go out analogue experiment installation.The apparatus structure is simple, reasonable design, and assembly is easy.By be configured stress simulation loading system and Gas pressure simulated loading system is capable of providing stable pressure, realizes three-dimensional on-load pressure, and the energy when coal sample occurs prominent Enough critical pressure values accurately recorded when protruding can be by the number of acquisition by the way that acoustic emission probe and pressure sensor is arranged According to being transferred on computer, reflect the changing rule of the energy and pressure before and after coal and gas prominent in real time.

In order to solve the above technical problems, the technical solution adopted by the present invention is:A kind of coal and gas prominent simulated experiment dress It sets, it is characterised in that:Including crustal stress simulated loading system, gas pressure simulated loading system, acoustic emission system, prominent babinet And computer;The crustal stress simulated loading system includes electronic universal tester, the first hydraulic cylinder and the second hydraulic cylinder, It is placed on the pedestal of electronic universal tester in the prominent babinet pair, the electronic universal tester, the first hydraulic cylinder It is connected with computer with the second hydraulic cylinder;First hydraulic cylinder and the second hydraulic cylinder are respectively arranged in prominent case On the two neighboring side wall of body;

The prominent babinet includes the box-like body of upper end opening and the cabinet base below box-like body, the case The upper end of body ontology is provided with case lid, is equipped in the middle part of the case lid and is compressed axially piston, and described be compressed axially on piston sets There is an axial air-filled pore being connected with box-like body internal cavity, is provided on the cabinet base and is connected with the cavity Pedestal air-filled pore, it is described axial direction air-filled pore on be connected with gas pipeline, gas service pipe, the gas are connected on the gas pipeline Body branch pipe is connected with pedestal air-filled pore, and protrusion is offered on the box-like body and on the side wall opposite with the second hydraulic cylinder Mouthful, it is provided on the aspis and removably protrudes plug, be equipped on the box-like body and on the outside of aspis Simulate tunnel device;On the inside of the cabinet base and simulation tunnel bottom of device is both provided with acoustic emission probe and pressure sensing Device;

The gas pressure simulated loading system includes methane gas tank and air compressor;The methane gas tank passes through First pipeline is connect with gas pipeline, and air compressor is connect by the second pipeline with gas pipeline;

The acoustic emission system includes Acoustic radiating instrument, and the input terminal of the Acoustic radiating instrument is connected with acoustic emission probe.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:Further include data collecting instrument, the number Be connected with pressure sensor according to the input terminal of Acquisition Instrument, the output end of the Acoustic radiating instrument and the output end of data collecting instrument with Computer is connected.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:It is provided with pressure on the inside of the case lid Plate is provided in the middle part of the case lid and is compressed axially piston hole, be compressed axially piston pass through it is described be compressed axially piston hole with it is upper Pressing plate is flexibly connected, and the central gas hole being connected with the cavity, the central gas hole position are provided on the top board It is connected in the underface of axial air-filled pore and with axial air-filled pore, the side of the first hydraulic cylinder is installed on the box-like body The first side guide is provided in wall, the compression piston of the first hydraulic cylinder is flexibly connected across box-like body with the first side guide, It is equipped on box-like body in the side wall of the second hydraulic cylinder and is provided with the second side guide, the compression piston of the second hydraulic cylinder is worn Box-like body is crossed to be flexibly connected with the second side guide.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:The lower surface of the top board and case The lower surface of lid is concordant, and the interior of the side wall of the first hydraulic cylinder is equipped on the inner surface and box-like body of first side guide Flush, the inner surface that the side wall of the second hydraulic cylinder is equipped on the inner surface and box-like body of second side guide are flat Together;Multiple top board air-filled pores, the top board air-filled pore and axial air-filled pore and the cavity are provided on the top board It is connected to.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:The case lid is spiral shell with box-like body It tethers and connects;Between the box-like body and case lid, be compressed axially between piston and case lid, the compression piston of the first hydraulic cylinder with Between box-like body, between the compression piston and box-like body of the second hydraulic cylinder aspis and simulation tunnel device between It is provided with sealing ring.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:Simulation tunnel device includes saturating Bright tunnel, the transparent tunnel are installed on by bolt on box-like body, and transparent tunnel is set in the middle part of one end far from box-like body It is equipped with and closes transparent Photo Studio, high-speed camera, end of the transparent tunnel far from box-like body are installed in the Photo Studio It is provided with pressure relief opening, the bottom in the cabinet base and transparent tunnel is both provided with routing hole, and the conducting wire of acoustic emission probe passes through Routing hole is connect with Acoustic radiating instrument.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:The bottom in the transparent tunnel is arranged It is useful for supporting the pedestal in transparent tunnel.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:It is provided on first pipeline watt This pressure gauge and pressure reducing valve, the pressure reducing valve are arranged between gas pressure table and methane gas tank on second pipeline There are vacuum table and intake valve, the intake valve is between vacuum table and air compressor.

A kind of above-mentioned coal and gas prominent analogue experiment installation, it is characterised in that:First hydraulic cylinder passes through One hydraulic system fuel feeding, first hydraulic system include the first hydraulic oil container and the first hydraulic pump, first hydraulic pump Oil inlet is connect by the first hydraulic tube with the first hydraulic oil container, and the oil inlet of first hydraulic cylinder passes through the second hydraulic tube It is connect with the oil outlet of the first hydraulic pump, first pressure gauge and the first overflow valve is connected on second hydraulic tube;Described Two hydraulic cylinders include the second hydraulic oil container and the second hydraulic pump by the second hydraulic system fuel feeding, second hydraulic system, The oil inlet of second hydraulic pump is connect by third hydraulic tube with the second hydraulic oil container, the oil inlet of second hydraulic cylinder It mouthful is connect with the oil outlet of the second hydraulic pump by the 4th hydraulic tube, second pressure gauge and the is connected on the 4th hydraulic tube Two overflow valves.

In addition, the present invention also provides a kind of method carrying out coal and gas prominent simulated experiment using above-mentioned apparatus, It is characterized in that:Include the following steps:

Step 1: opening case lid, coal dust to be tested is fitted into prominent babinet, electronic universal tester is opened, passes through It is compressed axially piston to be further applied load to the coal dust in prominent babinet, it is coal sample to make pulverized coal forming;

Step 2: case lid and box-like body are tightly connected, prominent plug is taken down, is carried out between aspis and coal sample close Then envelope blocks aspis with prominent plug;

Step 3: opening the first hydraulic cylinder and the second hydraulic cylinder, applies stable initial value to coal sample, open simultaneously Methane gas tank detects the air-tightness of prominent babinet;

Step 4: after air-leakage test, the first hydraulic cylinder, the second hydraulic cylinder and methane gas tank are closed, is opened It opens air compressor to be de-gassed coal sample, air compressor is closed after the completion of degassing;

Step 5: after coal sample degassing, electronic universal tester, the first hydraulic cylinder and the second hydraulic cylinder are opened, to coal Sample applies initial pressure, and methane gas tank and axial air-filled pore, pedestal air-filled pore are tightly connected, the stream of methane gas tank is adjusted Amount makes gas pressure reach preset value and keep stable, passes through axial air-filled pore and coal of the pedestal air-filled pore into prominent babinet Sample is inflated, and makes coal sample adsorption gas;

Step 6: carrying out coal and gas prominent simulated experiment after the completion of waiting for coal sample adsorption gas, tested by electronic universal Machine applies axis pressure to coal sample, opens the first hydraulic cylinder and the second hydraulic cylinder and applies confining pressure to coal sample, passes through methane gas tank Gas pressure is applied to coal sample, stops the load of axis pressure, confining pressure and gas pressure after stablizing to generation coal and gas prominent immediately, Experimental data is recorded and preserved, all loading equipemtns are closed.

Compared with the prior art, the present invention has the following advantages:

1, coal and gas prominent analogue experiment installation of the present invention is simple in structure, reasonable design, and assembly is easy.

2, the present invention is by being arranged axial air-filled pore and pedestal air-filled pore, and is preferably provided with the top board for being provided with air-filled pore, So that protruding the inflation of coal sample in babinet evenly.

3, the present invention take down when coal and gas prominent simulated experiment prominent stifled by the way that dismountable prominent plug is arranged Head is sealed between aspis and coal sample, is then blocked aspis with prominent plug, be ensure that the airtight of prominent babinet Property, while avoiding the manual defect opened and influence prominent energy of aspis.

4, the cabinet base of the protrusion babinet of coal and gas prominent analogue experiment installation of the present invention and simulation tunnel device bottom Portion is equipped with acoustic emission probe and pressure sensor, can will in the data transmission to computer of acquisition, in real time reflect coal with The changing rule of energy and pressure before and after Gas Outburst.

5, the crustal stress loading system of coal and gas prominent analogue experiment installation of the present invention and gas pressure loading system energy Critical pressure value when stable pressure being enough provided, and accurately can record prominent when coal sample occurs prominent.

6, the present invention can be recorded and be protected in detail preferably in simulation tunnel device one end setting Photo Studio and high-speed camera The entire dynamic process of coal and gas prominent is held, to provide certain foundation to disclose coal and gas prominent mechanism.

7, device and method using the present invention more can really reflect the whole process of coal and gas prominent, simultaneously It can realize three-dimensional on-load pressure, the blowing pressure is big, good seal performance, highly practical, convenient for promoting the use of.

In conclusion reasonable design of the present invention, can really reflect the whole process of mine coal and gas prominent, it can It avoids the problem that aspis is opened manually and influences prominent energy, energy and pressure before and after coal and gas prominent can be recorded in real time Changing rule, be capable of it is detailed observation coal and gas prominent entire dynamic process, it is highly practical, convenient for promoting the use of.

With reference to the accompanying drawings and examples, technical scheme of the present invention will be described in further detail.

Description of the drawings

Fig. 1 is the structural schematic diagram of coal and gas prominent analogue experiment installation of the present invention removal simulation tunnel device.

Fig. 2 is the position relationship schematic diagram of the protrusion babinet and simulation tunnel device of the present invention.

Fig. 3 is the layout position illustration of central gas hole of the present invention and top board air-filled pore in top board.

Fig. 4 is the structural schematic diagram of cabinet base of the present invention.

Fig. 5 is the schematic block circuit diagram of the present invention.

Reference sign:

1-electronic universal tester;2-1-is compressed axially piston;2-2-axial direction air-filled pore;

2-3-case lid;2-4-central gas hole;2-5-top board;

2-6-box-like body;The first side guides of 2-7-;2-8-cabinet base;

2-9-gas service pipe;2-10-routing hole;The second side guides of 2-11-;

2-12-protrusion plug;2-13-aspis;2-14-pedestal air-filled pore;

2-15-top board air-filled pore;2-16-gas pipeline;3-first pressure gauges;

4-the first overflow valve;5-the first hydraulic pump;6-the first hydraulic oil container;

7-gas pressure tables;8-pressure reducing valves;9-intake valves;

10-vacuum tables;11-air compressors;12-methane gas tanks;

13-computers;14-data collecting instruments;15-Acoustic radiating instruments;

16-the first hydraulic cylinder;17-coal samples;18-the second hydraulic cylinder;

19-acoustic emission probes;20-transparent tunnels;21-high-speed cameras;

22-pressure sensors;23-pressure relief openings;24-pedestals;

25-second pressure gauges;26-the second overflow valve;27-the second hydraulic pump;

28-the second hydraulic oil container;29-Photo Studios;30-the first pipeline;

31-the second pipeline.

Specific implementation mode

As shown in Figure 1, Figure 2, Figure 3 and Figure 4, coal and gas prominent analogue experiment installation of the invention, it is characterised in that:Packet Include crustal stress simulated loading system, gas pressure simulated loading system, acoustic emission system, prominent babinet and computer 13;It is described Crustal stress simulated loading system includes electronic universal tester 1, the first hydraulic cylinder 16 and the second hydraulic cylinder 18, the protrusion It is placed in babinet pair on the pedestal of electronic universal tester 1, the electronic universal tester 1, the first hydraulic cylinder 16 and Two hydraulic cylinders 18 are connected with computer 13;First hydraulic cylinder, 16 and second hydraulic cylinder 18 is respectively arranged in prominent Go out on the two neighboring side wall of babinet;

The box-like body 2-6 and the cabinet base below box-like body 2-6 that the prominent babinet includes upper end opening The upper end of 2-8, the box-like body 2-6, which are provided with to be equipped in the middle part of case lid 2-3, the case lid 2-3, is compressed axially piston 2- 1, the piston 2-1 that is compressed axially is equipped with the axial air-filled pore 2-2 being connected with box-like body 2-6 internal cavities, the case It is provided on body pedestal 2-8 on pedestal the air-filled pore 2-14, the axial direction air-filled pore 2-2 being connected with the cavity and is connected with gas Gas service pipe 2-9, the gas service pipe 2-9 and pedestal air-filled pore 2- are connected on body pipeline 2-16, the gas pipeline 2-16 14 are connected, and aspis 2-13 is offered on the box-like body 2-6 and on the side wall opposite with the second hydraulic cylinder 18, described It is provided on aspis 2-13 on dismountable prominent plug 2-12, the box-like body 2-6 and positioned at the outer of aspis 2-13 Side is equipped with simulation tunnel device;On the inside of the cabinet base 2-8 and simulation tunnel bottom of device is both provided with acoustic emission probe 19 and pressure sensor 22;

The gas pressure simulated loading system includes methane gas tank 12 and air compressor 11;The methane gas tank 12 are connect by the first pipeline 30 with gas pipeline 2-16, and air compressor 11 passes through the second pipeline 31 and gas pipeline 2-16 Connection;

The acoustic emission system includes Acoustic radiating instrument 15, input terminal and 19 phase of acoustic emission probe of the Acoustic radiating instrument 15 Even.

Further include data collecting instrument 14, input terminal and the pressure sensor 22 of the data collecting instrument 14 in the present embodiment It is connected, the output end of the Acoustic radiating instrument 15 and the output end of data collecting instrument 14 are connected with computer 13.

In the present embodiment, it is provided in the middle part of top board 2-5, the case lid 2-3 on the inside of the case lid 2-3 and is provided with axial direction Compression piston hole, be compressed axially piston 2-1 pass through it is described be compressed axially piston hole and be flexibly connected with top board 2-5, the upper pressure The central gas hole 2-4 being connected with the cavity is provided on plate 2-5, the central gas hole 2-4 is located at axial air-filled pore The underface of 2-2 and it is connected with axial air-filled pore 2-2, the side of the first hydraulic cylinder 16 is installed on the box-like body 2-6 The first side guide 2-7 is provided in wall, the compression piston of the first hydraulic cylinder 16 passes through box-like body 2-6 and the first side guide 2- 7 flexible connections are equipped in the side wall of the second hydraulic cylinder 18 on box-like body 2-6 and are provided with the second side guide 2-11, and second The compression piston of hydraulic cylinder 18 is flexibly connected across box-like body 2-6 with the second side guide 2-11.

In the present embodiment, the lower surface of the top board 2-5 is concordant with the lower surface of case lid 2-3, first side guide The inner surface of 2-7 is concordant with the inner surface of side wall for being equipped with the first hydraulic cylinder 16 on box-like body 2-6, second side pressure The inner surface of plate 2-11 is concordant with the inner surface of side wall for being equipped with the second hydraulic cylinder 18 on box-like body 2-6;The upper pressure Multiple top board air-filled pore 2-15, the top board air-filled pore 2-15 and axial direction air-filled pore 2-2 and the chamber are provided on plate 2-5 Body is connected to.

In the present embodiment, the case lid 2-3 and box-like body 2-6 is to be bolted;The box-like body 2-6 and case lid 2- Between 3, be compressed axially between piston 2-1 and case lid 2-3, between the compression piston and box-like body 2-6 of the first hydraulic cylinder 16, It is respectively provided between aspis 2-13 and simulation tunnel device between the compression piston and box-like body 2-6 of second hydraulic cylinder 18 There is sealing ring.

In the present embodiment, simulation tunnel device includes transparent tunnel 20, and the transparent tunnel 20 is installed by bolt In on box-like body 2-6, transparent tunnel 20 is provided in the middle part of one end far from box-like body 2-6 and closes transparent Photo Studio 29, High-speed camera 21 is installed, end set of the transparent tunnel 20 far from box-like body 2-6 has pressure relief opening in the Photo Studio 29 The bottom in 23, the cabinet base 2-8 and transparent tunnel 20 is both provided with routing hole 2-10, and the conducting wire of acoustic emission probe 19 is worn Routing hole 2-10 is crossed to connect with Acoustic radiating instrument 15.

In the present embodiment, the bottom in the transparent tunnel 20 is provided with the pedestal 24 for being used to support transparent tunnel 20.

In the present embodiment, gas pressure table 7 and pressure reducing valve 8 are provided on first pipeline 30, the pressure reducing valve 8 is located at Between gas pressure table 7 and methane gas tank 12, be provided with vacuum table 10 and intake valve 9 on second pipeline 31, it is described into Air valve 9 is between vacuum table 10 and air compressor 11.

In the present embodiment, first hydraulic cylinder 16 passes through the first hydraulic system fuel feeding, the first hydraulic system packet The first hydraulic oil container 6 and the first hydraulic pump 5 are included, the oil inlet of first hydraulic pump 5 passes through the first hydraulic tube and the first hydraulic pressure Fuel tank 6 connects, and the oil inlet of first hydraulic cylinder 16 is connect by the second hydraulic tube with the oil outlet of the first hydraulic pump 5, First pressure gauge 3 and the first overflow valve 4 are connected on second hydraulic tube;Second hydraulic cylinder 18 passes through the second hydraulic pressure System fuel feeding, second hydraulic system include the second hydraulic oil container 28 and the second hydraulic pump 27, second hydraulic pump 27 Oil inlet is connect by third hydraulic tube with the second hydraulic oil container 28, and the oil inlet of second hydraulic cylinder 18 passes through the 4th liquid Pressure pipe is connect with the oil outlet of the second hydraulic pump 27, and second pressure gauge 25 and the second overflow valve are connected on the 4th hydraulic tube 26。

Following steps are specifically included using the method that above-mentioned apparatus carries out coal and gas prominent simulated experiment:

Step 1: opening case lid 2-3, coal dust to be tested is fitted into five times in prominent babinet, after being packed into coal dust every time Electronic universal tester 1 is opened, is further applied load to the coal dust in prominent babinet by being compressed axially piston 2-1, after coal dust installs Pulverized coal forming is set to be coal sample 17 according to pre-set briquetting pressure;

Step 2: case lid 2-3 and box-like body 2-6 is tightly connected, take down prominent plug 2-12, to aspis 2-13 with It is sealed and (is preferably sealed using sealing material substantially identical with 17 intensity of coal sample) between coal sample 17, then with protrusion Plug 2-12 blocks aspis 2-13;

Step 3: opening the first hydraulic cylinder 16 and the second hydraulic cylinder 18, apply stable initial value to coal sample 17, together Shi Kaiqi methane gas tank 12 detects the air-tightness of prominent babinet;

Step 4: after air-leakage test, the first hydraulic cylinder 16, the second hydraulic cylinder 18 and methane gas are closed Tank 12 is opened air compressor 11 and is de-gassed to coal sample 17, air compressor 11 is closed after the completion of degassing;

Step 5: after coal sample 17 deaerates, electronic universal tester 1, the first hydraulic cylinder 16 and the second hydraulic cylinder are opened 18, initial pressure is applied to coal sample 17, methane gas tank 12 and axial air-filled pore 2-2, pedestal air-filled pore 2-14 are tightly connected, The flow for adjusting methane gas tank 12 makes gas pressure reach preset value and keeps stable, passes through axial air-filled pore 2-2 and bottom Coal samples 17 of the seat air-filled pore 2-14 into prominent babinet is inflated, inflationtime at least 32h, makes the fully absorption watt of coal sample 17 This;

Step 6: carrying out coal and gas prominent simulated experiment after the completion of waiting for 17 adsorption gas of coal sample, tried by electronic universal It tests machine 1 and axis pressure is applied to coal sample 17, open the first hydraulic cylinder 16 and the second hydraulic cylinder 18 and confining pressure is applied to coal sample 17, pass through Methane gas tank 12 to coal sample 17 apply gas pressure, stablize to occur coal and gas prominent after stop immediately axis pressure, confining pressure and The load of gas pressure records and preserves experimental data, closes all loading equipemtns.

The above is only presently preferred embodiments of the present invention, not does any restrictions to the present invention, every according to invention skill Art essence changes any simple modification, change and equivalent structure made by above example, still falls within the technology of the present invention In the protection domain of scheme.

Claims (8)

1. a kind of coal and gas prominent analogue experiment installation, it is characterised in that:Including crustal stress simulated loading system, gas pressure Simulated loading system, acoustic emission system, prominent babinet and computer (13);The crustal stress simulated loading system includes electronics ten thousand Can testing machine (1), the first hydraulic cylinder (16) and the second hydraulic cylinder (18), be placed on electronic universal in the prominent babinet pair On the pedestal of testing machine (1), the electronic universal tester (1), the first hydraulic cylinder (16) and the second hydraulic cylinder (18) are equal It is connected with computer (13);First hydraulic cylinder (16) and the second hydraulic cylinder (18) are respectively arranged in prominent babinet On two neighboring side wall;
The box-like body (2-6) and the cabinet base below box-like body (2-6) that the prominent babinet includes upper end opening The upper end of (2-8), the box-like body (2-6) are provided with case lid (2-3), and axial pressure is equipped in the middle part of the case lid (2-3) Contracting piston (2-1), the piston (2-1) that is compressed axially are filled equipped with the axial direction being connected with box-like body (2-6) internal cavity Stomata (2-2) is provided with the pedestal air-filled pore (2-14) being connected with the cavity, the axis on the cabinet base (2-8) It is connected with gas pipeline (2-16) on air-filled pore (2-2), gas service pipe (2-9) is connected on the gas pipeline (2-16), The gas service pipe (2-9) is connected with pedestal air-filled pore (2-14), on the box-like body (2-6) and with the second hydraulic cylinder (18) aspis (2-13) is offered on opposite side wall, and dismountable prominent plug is provided on the aspis (2-13) (2-12) is equipped with simulation tunnel device on the box-like body (2-6) and on the outside of aspis (2-13);The babinet On the inside of pedestal (2-8) and simulation tunnel bottom of device is both provided with acoustic emission probe (19) and pressure sensor (22);
The gas pressure simulated loading system includes methane gas tank (12) and air compressor (11);The methane gas tank (12) it is connect with gas pipeline (2-16) by the first pipeline (30), air compressor (11) passes through the second pipeline (31) and gas Pipeline (2-16) connects;
The acoustic emission system includes Acoustic radiating instrument (15), input terminal and acoustic emission probe (19) phase of the Acoustic radiating instrument (15) Even;
The experimental provision further includes data collecting instrument (14), the input terminal and pressure sensor of the data collecting instrument (14) (22) it is connected, the output end of the Acoustic radiating instrument (15) and the output end of data collecting instrument (14) are connected with computer (13);
It is provided with top board (2-5) on the inside of the case lid (2-3), is provided in the middle part of the case lid (2-3) and is compressed axially piston Hole, be compressed axially piston (2-1) pass through it is described be compressed axially piston hole and be flexibly connected with top board (2-5), the top board (2- 5) the central gas hole (2-4) being connected with the cavity is provided on, the central gas hole (2-4) is located at axial air-filled pore The underface of (2-2) and it is connected with axial air-filled pore (2-2), the first hydraulic cylinder is installed on the box-like body (2-6) (16) the first side guide (2-7) is provided in side wall, the compression piston of the first hydraulic cylinder (16) passes through box-like body (2-6) It is flexibly connected with the first side guide (2-7), is equipped in the side wall of the second hydraulic cylinder (18) and is provided on box-like body (2-6) The compression piston of second side guide (2-11), the second hydraulic cylinder (18) passes through box-like body (2-6) and the second side guide (2- 11) it is flexibly connected.
2. a kind of coal and gas prominent analogue experiment installation described in accordance with the claim 1, it is characterised in that:The top board The lower surface of (2-5) is concordant with the lower surface of case lid (2-3), inner surface and the box-like body (2- of first side guide (2-7) 6) inner surface that the side wall of the first hydraulic cylinder (16) is equipped on is concordant, the inner surface and case of second side guide (2-11) The inner surface that the side wall of the second hydraulic cylinder (18) is equipped on body ontology (2-6) is concordant;It is provided on the top board (2-5) Multiple top board air-filled pores (2-15), the top board air-filled pore (2-15) connect with axial air-filled pore (2-2) and the cavity It is logical.
3. according to a kind of coal and gas prominent analogue experiment installation as claimed in claim 1 or 2, it is characterised in that:The case lid (2-3) is to be bolted with box-like body (2-6);Between the box-like body (2-6) and case lid (2-3), it is compressed axially piston Between (2-1) and case lid (2-3), between the compression piston of the first hydraulic cylinder (16) and box-like body (2-6), the second hydraulic oil Between the compression piston and box-like body (2-6) of cylinder (18) aspis (2-13) and simulation tunnel device between be both provided with it is close Seal.
4. according to a kind of coal and gas prominent analogue experiment installation as claimed in claim 1 or 2, it is characterised in that:The simulation Tunnel device includes transparent tunnel (20), and the transparent tunnel (20) is installed on by bolt on box-like body (2-6), transparent lane Road (20) is provided in the middle part of one end far from box-like body (2-6) closes transparent Photo Studio (29), in the Photo Studio (29) High-speed camera (21) is installed, end set of the transparent tunnel (20) far from box-like body (2-6) has pressure relief opening (23), described The bottom of cabinet base (2-8) and transparent tunnel (20) is both provided with routing hole (2-10), and the conducting wire of acoustic emission probe (19) is worn Routing hole (2-10) is crossed to connect with Acoustic radiating instrument (15).
5. a kind of coal and gas prominent analogue experiment installation according to claim 4, it is characterised in that:The transparent tunnel (20) bottom is provided with the pedestal (24) for being used to support transparent tunnel (20).
6. a kind of coal and gas prominent analogue experiment installation described in accordance with the claim 1, it is characterised in that:First pipeline (30) gas pressure table (7) and pressure reducing valve (8) are provided on, the pressure reducing valve (8) is located at gas pressure table (7) and methane gas Between tank (12), vacuum table (10) and intake valve (9) are provided on second pipeline (31), the intake valve (9) is located at negative It presses between table (10) and air compressor (11).
7. a kind of coal and gas prominent analogue experiment installation described in accordance with the claim 1, it is characterised in that:First hydraulic pressure For oil cylinder (16) by the first hydraulic system fuel feeding, first hydraulic system includes the first hydraulic oil container (6) and the first hydraulic pump (5), the oil inlet of first hydraulic pump (5) is connect by the first hydraulic tube with the first hydraulic oil container (6), first hydraulic pressure The oil inlet of oil cylinder (16) is connect by the second hydraulic tube with the oil outlet of the first hydraulic pump (5), is connected on second hydraulic tube It is connected to first pressure gauge (3) and the first overflow valve (4);Second hydraulic cylinder (18) passes through the second hydraulic system fuel feeding, institute It includes the second hydraulic oil container (28) and the second hydraulic pump (27), the oil inlet of second hydraulic pump (27) to state the second hydraulic system It is connect with the second hydraulic oil container (28) by third hydraulic tube, the oil inlet of second hydraulic cylinder (18) passes through the 4th hydraulic pressure Pipe is connect with the oil outlet of the second hydraulic pump (27), and second pressure gauge (25) and the second overflow are connected on the 4th hydraulic tube Valve (26).
8. a kind of method carrying out coal and gas prominent simulated experiment using claims 1 or 2 described device, it is characterised in that: Include the following steps:
Step 1: opening case lid (2-3), coal dust to be tested is fitted into prominent babinet, electronic universal tester (1) is opened, It is further applied load to the coal dust in prominent babinet by being compressed axially piston (2-1), it is coal sample (17) to make pulverized coal forming;
Step 2: case lid (2-3) and box-like body (2-6) are tightly connected, prominent plug (2-12) is taken down, to aspis (2- 13) it is sealed between coal sample (17), then blocks aspis (2-13) with prominent plug (2-12);
Step 3: opening the first hydraulic cylinder (16) and the second hydraulic cylinder (18), apply stable initial value to coal sample (17), Methane gas tank (12) is opened simultaneously, detects the air-tightness of prominent babinet;
Step 4: after air-leakage test, the first hydraulic cylinder (16), the second hydraulic cylinder (18) and methane gas tank are closed (12), it opens air compressor (11) to be de-gassed coal sample (17), air compressor (11) is closed after the completion of degassing;
Step 5: after coal sample (17) degassing, electronic universal tester (1), the first hydraulic cylinder (16) and the second hydraulic oil are opened Cylinder (18) applies initial pressure to coal sample (17), by methane gas tank (12) and axial air-filled pore (2-2), pedestal air-filled pore (2- 14) it is tightly connected, the flow for adjusting methane gas tank (12) makes gas pressure reach preset value and keeps stable, passes through axial direction Air-filled pore (2-2) is inflated with coal sample (17) of the pedestal air-filled pore (2-14) into prominent babinet, makes coal sample (17) absorption watt This;
Step 6: carrying out coal and gas prominent simulated experiment after the completion of waiting for coal sample (17) adsorption gas, tested by electronic universal Machine (1) applies axis pressure to coal sample (17), opens the first hydraulic cylinder (16) and the second hydraulic cylinder (18) and applies to coal sample (17) Confining pressure applies gas pressure to coal sample (17) by methane gas tank (12), stablizes to after occurring coal and gas prominent and stop immediately The only load of axis pressure, confining pressure and gas pressure records and preserves experimental data, closes all loading equipemtns.
CN201611230222.8A 2016-12-27 2016-12-27 A kind of coal and gas prominent analogue experiment installation and experimental method CN106526094B (en)

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