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Actual measurement method of gas expansion energy emitted by coal seams for accurately predicting coal and gas outburst risks and measurement device thereof

A gas expansion energy and gas outburst technology, which is applied in mining equipment, earthwork drilling, mining equipment, etc., can solve the problems that the air permeability of the coal seam cannot be loaded, and the gas expansion energy cannot be truly reflected.

Inactive Publication Date: 2013-05-08
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, due to the large difference between the physical structure characteristics of the coal sample and the actual coal seam during the measurement process, and the influence of factors such as in-situ stress and coal seam permeability on the measurement results cannot be loaded and analyzed, the measurement results of the gas expansion energy released from the laboratory coal sample It cannot truly reflect the gas expansion energy of the actual coal seam

Method used

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  • Actual measurement method of gas expansion energy emitted by coal seams for accurately predicting coal and gas outburst risks and measurement device thereof
  • Actual measurement method of gas expansion energy emitted by coal seams for accurately predicting coal and gas outburst risks and measurement device thereof
  • Actual measurement method of gas expansion energy emitted by coal seams for accurately predicting coal and gas outburst risks and measurement device thereof

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Embodiment Construction

[0039] As shown in the figure: select a suitable location underground, construct the coal seam gas pressure measurement drilling 2, install the first sealing capsule 4, the pressure and temperature parameter acquisition system 6, the protective outer cover and the connecting rod 9 of the first and second sealing capsules , the second sealing capsule 12 and the third sealing capsule 13 are installed and connected and sent to the predetermined depth of the borehole; the water pump is used to inject water into the high-pressure water pipe 14 to make the three-section sealing capsule expand and seal the borehole; use a viscous pump Inject mucus into the high-pressure mucus pipe 15 to make the mucus further block the hole wall crack between the second and third sealing capsules; connect the gas pressure measuring pipe 16 to the pressure gauge to observe the gas pressure in the coal seam; wait for the pressure gauge reading to stabilize, The pressure relief solenoid valve 11 is autom...

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Abstract

The invention relates to measurement for gas expansion energy in actual underground coal seams, in particular to an actual measurement method of gas expansion energy emitted by coal seams for accurately predicting coal and gas outburst risks and a measurement device thereof, and belongs to the technical field of coal mine safety detection. According to the method, an underground coal seam gas pressure measurement drill hole is utilized, gas pressure and temperature parameters in a pressure releasing process of the pressure measurement drill hole are rapidly collected, and the characteristic that the gas flows through a reducing pipe is utilized, thereby achieving the actual measurement of gas expansion energy emitted by the coal seams. The measurement device comprises a plurality of hole-sealing capsules, and pressure and temperature collecting systems are arranged between adjacent capsules. According to the measurement of gas expansion energy in the actual underground coal seams, the measurement results can comprehensively reflect the influences of various factors such as ground stress, gas factors, physico-mechanical properties and structural characteristics of coal and the like on the coal seam outburst risks.

Description

technical field [0001] The invention relates to a measurement of gas expansion energy in an actual underground coal seam, in particular to an actual measurement method and a measurement device for gas expansion energy released from coal seams for accurately predicting the risk of coal and gas outburst, belonging to coal mine safety detection technology field. Background technique [0002] Coal and gas outburst is a dynamic phenomenon in which a large amount of coal, rock and gas suddenly rush into the mining space under the joint action of in-situ stress and gas pressure. Since the occurrence of outburst dynamic phenomena involves the comprehensive effects of various factors such as ground stress, gas factors, physical and mechanical properties of coal, and structural characteristics, this problem is far from being completely resolved. The latest research results show that the power and energy of outburst mainly come from the sudden release and expansion of gas in coal to d...

Claims

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Application Information

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IPC IPC(8): E21F17/18
Inventor 于宝海杨胜强杨相玉赵彤宇陈登昭王凯秦毅
Owner CHINA UNIV OF MINING & TECH
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