Experiment device for gas-containing coal body broken by multi-field coupling controllable impact wave

Abstract

The invention relates to the technical field of coal bed gas (mine gas) exploitation, in particular to an experiment device for a gas-containing coal body broken by a multi-field coupling controllableimpact wave. The experiment device comprises a high-power pulse generation mechanism and an impact wave detection mechanism, wherein a drilling hole is formed in a coal sample in advance, a liquid with certain pressure is injected into the drilling hole, the high-power pulse generation mechanism is connected with the drilling hole by a wire so that the high-power pulse generation mechanism emitshigh-power pulse to the liquid in the drilling hole when the high-power pulse generation mechanism works, the impact wave is formed in the liquid, the coal sample is broken, the impact wave detectionmechanism is matched with the coal sample, and the impact wave characteristic in the coal sample is detected and analyzed. The experiment device has the beneficial effects that pulse energy required when the coal body broken effect is relatively good can be determined, the impact wave characteristic and a damage and broken rule of the impact wave action coal body are researched, and numerical value calculation and analysis is performed on the rule of the coal body broken by the impact waves with different waveforms and energy.

Description

technical field [0001] The invention relates to the technical field of coal bed methane (mine gas) exploitation, in particular to an experimental device for cracking gas-containing coal bodies by multi-field coupling controllable shock waves. Background technique [0002] In recent years, with the development of science and technology, my country has made a breakthrough in the development of coal seams. As my country's coal demand increases year by year, the mining of coal seams in my country has gradually shifted to the deep. Deep coal seams have high gas pressure and high gas content, which easily lead to coal and gas outburst dynamic disasters in the mine production process. In order to prevent coal and gas outburst disasters and ensure safe production, it is necessary to drain the gas in the coal seam before mining the coal seam. However, the gas permeability of deep coal seams is generally low, so gas drainage is more difficult. In order to reduce the difficulty of ga...

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