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现代矿业 ›› 2024, Vol. 40 ›› Issue (04): 92-.

• • 上一篇    下一篇

突出煤层回采面CO2致裂二次增透后高效回采技术研究

天池煤矿15号煤层瓦斯含量高,难抽采,在回采割煤时,存在瓦斯超限隐患,且一个割
煤循环需要6 h以上,严重制约了工作面的回采速度。为提高开采效率,利用CO2致裂煤岩的技术方
法,提出了突出煤层回采面CO2致裂二次增透高效回采技术。通过试验发现:CO2致裂后,瓦斯涌出量
平均减少了 16.7%,并能实现密集钻孔条件下的瓦斯高效抽采,提高回采速度。割煤速度从致裂前
2.11~2.91刀/d提高到3.38~4.59刀/d,平均提高了1.63倍。
  

  1. 1. 山西和顺天池能源有限责任公司;
    2. 河南理工大学资源环境学院
  • 出版日期:2024-04-15 发布日期:2024-08-13

Study on High-efficiency Mining Technology after Secondary Anti-reflection by CO2 Fracturing
in Outburst Coal Seam Mining Face

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.
  

  1. 1. Shanxi Heshun Tianchi Energy Co.,Ltd.;Abstract 2. School of Resources and Environment,Henan Polytechnic University
  • Online:2024-04-15 Published:2024-08-13

摘要:

天池煤矿15号煤层瓦斯含量高,难抽采,在回采割煤时,存在瓦斯超限隐患,且一个割
煤循环需要6 h以上,严重制约了工作面的回采速度。为提高开采效率,利用CO2致裂煤岩的技术方
法,提出了突出煤层回采面CO2致裂二次增透高效回采技术。通过试验发现:CO2致裂后,瓦斯涌出量
平均减少了 16.7%,并能实现密集钻孔条件下的瓦斯高效抽采,提高回采速度。割煤速度从致裂前
2.11~2.91刀/d提高到3.38~4.59刀/d,平均提高了1.63倍。

关键词:

工作面瓦斯
二次增透 割煤速率

Abstract:

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.

Key words: