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Projecting simulator stand for coal and firedamp

A technology for simulating test benches and gas outbursts, applied in instruments, measuring devices, scientific instruments, etc., can solve problems affecting the time and intensity of coal and gas outburst, small model size, slow opening speed, etc.

Inactive Publication Date: 2008-07-23
CHONGQING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the original coal and gas outburst experimental device has deepened the research progress of coal and gas outburst mechanism to a certain extent, it has the following disadvantages more or less: the size of the model used in the above experimental devices is small, The gas medium used is CO 2 or N 2 , and all models are horizontal, but in reality, there are relatively few coal seams with horizontal inclination angles underground, which cannot fully simulate the actual gas-containing coal seams on site, especially in the case of roof and floor stone gate coal outbursts, the coal seams encountered are all inclined In addition, the opening method of the outburst of the device is also manual, and the opening speed is relatively slow, which affects the time and intensity of coal and gas outburst to a certain extent, and is different from the real underground coal and gas outburst; in addition, The stress applied by all the above experimental devices is also uniform, and the local stress concentration of the mining face caused by mining activities has not been simulated, and the stress concentration is often an important factor causing the outburst

Method used

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  • Projecting simulator stand for coal and firedamp
  • Projecting simulator stand for coal and firedamp
  • Projecting simulator stand for coal and firedamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] As shown in Fig. 1, Fig. 2 and Fig. 3, it is the coal and gas outburst simulation test bench of the present invention. The test bench is mainly composed of a reaction force frame 26, a pressure test box 30, a quick release mechanism and a jack 18.

[0042] Reaction force frame 26 is made up of left column 16, right column 17 and upper beam 14 and lower beam 15 that are installed on this left column 16, right column 17 upper and lower ends, and a row of jacks 18 is respectively installed around the inside of reaction force frame 26, Each jack 18 is all connected with an oil pump, so that the pressure of each jack 18 can be controlled by adjusting the oil pump, and a program can be set to control the pressure of each jack 18 by computer. Wherein, the ejector pin of upper row jack 18 faces downward, and the front end of each jack in the upper row jack 18 is respectively connected with an upper pressing block 19, and the ejector rod of lower row jack 18 faces upwards, and ea...

Embodiment 2

[0058] The structure of the test bench is the same as that of Embodiment 1, except that the pressure test box 30 is different. As shown in Figure 11, the angle between the axis line of the pressure test box 30 and the horizontal plane is 0°, and the upper pressure block 19 and the lower support are replaced accordingly. Block 20 can simulate the coal and gas outburst process under the horizontal dip coal seam.

Embodiment 3

[0060] The structure of the test bench is the same as in Embodiment 1, except that the pressure test box 30 is different. As shown in Figure 12, the angle between the axis line of the pressure test box 30 and the horizontal plane is 30°, and the upper pressure block 19 and the lower support are replaced accordingly. Block 20 can simulate the coal and gas outburst process under the 30° inclination coal seam.

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Abstract

The invention relates to a coal-gas outburst simulation platform for processing coal-gas outburst simulation researches under different coal bed inclinations, different ground stresses and different gas pressures, and researching the transmission rule and attenuation character of acoustic emission signal in the outburst process. The invention uses a plurality of hydraulic jacks to axially jack coal sample, uses an aeration port to charge gas into the coal sample, and can simulate the protruded stress concentrated zone caused by underground coal face, to simulate the outburst condition of coal and gas. The protruded port of the device via a quick release device can realize mechanical automatic control, to quickly open the protruded port to instantly release pressure at the protruded end and eliminate the effect on the protruding energy by manually opening the protruded port, to simulate on-site protrusion actually.

Description

technical field [0001] The invention relates to a coal and gas outburst test device, in particular, it relates to the simulated test research of coal and gas outburst under different coal seam dip angles, different ground stresses, and different gas pressures, and at the same time, it is used to study the acoustic emission signal during the outburst process. Coal and gas outburst simulation test-bed for propagation law and attenuation characteristics. Background technique [0002] In the study of the mechanism of coal and gas outburst, the hypothesis of comprehensive action is generally accepted by scholars. It believes that coal and gas outburst is the result of the combined action of stress, gas pressure and mechanical properties of coal. The mechanism of pressure and mechanical properties of coal in the outburst process has not yet been clarified. The former Soviet Union carried out a one-dimensional outburst simulation experiment in the 1950s, and the experiment showed ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/00G01V9/00
Inventor 尹光志许江鲜学福魏作安王维忠陶云奇赵洪宝王登科李树春
Owner CHONGQING UNIV
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