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Experimental simulation device and simulation method for temperature-pressure pulse composite cracked coal

An experimental simulation, temperature pulse technology, applied in measuring devices, using stable tension/pressure to test material strength, instruments, etc., can solve the uncertainty of experimental results, different stress states, increased experimental costs in the underground environment of coal mines, and Dangerous and other problems, to achieve the effect of compact structure, simple operation, convenient installation and layout

Active Publication Date: 2017-12-12
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

The complexity of the underground environment of the coal mine increases the cost and risk of the experiment; the gas stress, coal quality, and stress state of each coal mine are different, which also makes the experimental results uncertain

Method used

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  • Experimental simulation device and simulation method for temperature-pressure pulse composite cracked coal
  • Experimental simulation device and simulation method for temperature-pressure pulse composite cracked coal

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Experimental program
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Embodiment 1

[0024] Such as figure 1 and 2 As shown, an experimental simulation device for temperature-pressure pulse combined fracturing coal body, including closed triaxial pressurization device, temperature-pressure pulse combined fracturing device, vacuum pumping and gas injection device and monitoring device; temperature-pressure pulse combined fracturing device The device includes a temperature pulse generating device 5 and a high-pressure pulse water pump 4, wherein the temperature pulse generating device 5 includes a temperature sensor 13 and a temperature regulating device; the vacuum pumping and gas injection device includes a vacuum pump 6-2 and a gas injection cylinder with a pressure gauge 6-1, and connected to the coal body through a three-way valve; the three-axis pressurization device includes a coal sample tank 12, the three inner sides of the coal sample tank 12 are provided with a pressure plate 2, and the outer side of the pressure plate is vertically provided with a th...

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Abstract

The invention discloses an experimental simulation device and an experimental simulation method for temperature-pressure pulse composite cracked coal. The device comprises a closed three-shaft pressurizing device, a temperature-pressure pulse composite cracking device, a vacuumizing and gas inflation device and a monitoring device, wherein the temperature-pressure pulse composite cracking device comprises a temperature pulse generation device and a high pressure pulse water pump, the vacuumizing and gas inflation device comprises a vacuumizing pump and an gas injection bottle and is connected with coal via a three-way valve; the closed three-shaft pressurizing device comprises a coal sample tank, pressure plates are arranged on three inner side surfaces of the coal sample tank, and a pushing rod is perpendicularly arranged on the outer side of each pressure plate; the monitoring device comprises a gas concentration monitoring probe, a camera probe with a light source and an electric wire; a cubic groove in the coal sample tank is connected with the coal sample in the closed three-shaft pressurizing device. According to the device and the method provided by the invention, gas adsorption capacity is reduced and gas desorption is promoted by using temperature and pressure pulses by simulating pressure and gas occurrence situations around an underground coal seam; operation is simple, installation and arrangement are felicitated, and production cost is reduced.

Description

technical field [0001] The invention relates to an experimental simulation device and simulation method for temperature-pressure pulse combined fracturing of coal bodies, in particular to an experimental simulation device and method suitable for temperature pulse and pulse hydraulic fracturing combined fracturing of coal bodies in underground coal mines. The utility model belongs to the technical field of underground mining of coal mines. Background technique [0002] Gas is one of the important factors affecting coal mine production safety. The coal body in the coal mine absorbs 80% to 90% of the gas and releases it during mining. With the increase of mining depth and the increase of single well production, the amount of gas emission is increasing day by day. Gas disasters have become an important problem restricting the safe and efficient production of coal mines. Gas drainage is one of the effective means to solve gas disasters. The current commonly used pulse hydrauli...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/12
CPCG01N3/12G01N2203/001G01N2203/0019G01N2203/0062
Inventor 姜海纳张莹莹李伟卓赵富强徐乐华冯国瑞胡胜勇李振高强崔家庆宋诚
Owner TAIYUAN UNIV OF TECH
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