Modern Mining ›› 2024, Vol. 40 ›› Issue (04): 92-.
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The gas content of No.15 coal seam in Tianchi Coal Mine is high and difficult to extract.
There is a hidden danger of gas overrun in coal mining，and a coal cutting cycle takes more than 6 h，which
seriously restricts the mining speed of the working face. In order to improve the mining efficiency，using the
technical method of CO2 fracturing coal rock，the CO2 fracturing secondary anti-reflection and high-efficien⁃
cy mining technology of outburst coal seam mining face is proposed. Through the experiment，it is found that
after CO2 fracturing，the gas emission is reduced by 16.7% on average，and the efficient gas extraction un⁃
der the condition of dense drilling can be realized，and the mining speed can be improved. The coal cutting
speed increased from 2.11~2.91 knives/d before fracturing to 3.38~4.59 knives/d，with an average increase
of 1.63times.
