An Experimental Method for Fracturing Gas-Containing Coal Body with High Power Pulse Wave

Abstract

The invention relates to the technical field of coalbed methane (mine gas) mining, in particular to an experimental method for cracking gas-containing coal bodies by high-power pulse waves, which includes making coal samples; installing a high-power pulse generating mechanism; installing an acoustic emission detection mechanism; The high-power pulse generating mechanism emits a high-power pulse to the coal sample to crack the coal sample, so that the acoustic emission detection mechanism detects and analyzes the acoustic emission in the coal sample, and also includes installing a shock wave detection mechanism, The shock wave detection mechanism detects and analyzes the shock wave characteristics in the coal sample. The beneficial effects of adopting the present invention are: it is possible to determine the required pulse energy when the effect on coal fracturing is good, to analyze the temporal and spatial evolution law of acoustic emission in the cracking process of gas-containing coal under relatively high confining pressure and high gas pressure, and to explore gas The influence of pressure on the characteristics of acoustic emission, the experimental research on the characteristics of shock wave and the law of coal sample cracking by shock wave, and the numerical calculation and analysis of the law of shock wave cracking with different waveform energies.

Description

technical field [0001] The invention relates to the technical field of coal bed methane (mine gas) exploitation, in particular to an experimental method for cracking gas-containing coal bodies by high-power pulse 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 gas drainage, measures ne...

AI Technical Summary

Problems solved by technology

These technologies generally have disadvantages such as complex process, large construction volume, high cost and limited application range.

Images