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金属矿山 ›› 2019, Vol. 48 ›› Issue (04): 48-52.

• 采矿工程 • 上一篇    下一篇

亭南煤矿液态CO2致裂巷道卸压技术的应用研究

题正义,陈波   

  1. 辽宁工程技术大学矿业学院,辽宁 阜新 123000
  • 出版日期:2019-04-15 发布日期:2019-05-13

Application of Pressure Relief Technology of Liquid CO2 Fracturing Roadway in Tingnan Coal Mine

Ti Zhengyi,Chen Bo   

  1. School of Mining, Liaoning Technical University, Fuxin 123000, China
  • Online:2019-04-15 Published:2019-05-13

摘要: 为了消除冲击地压给亭南煤矿带来的安全隐患,采用液态CO2致裂技术对危险区域的煤体进行预裂爆破。通过数值模拟研究控制孔对钻孔爆破的影响及亭南煤矿爆破孔的合理间距,并采用钻屑法对爆破后的效果进行分析。研究结果表明:控制孔的存在对煤预裂爆破效果是有利的,施工控制孔之后进行煤层液态CO2爆破的裂隙区影响范围明显大于无控制孔时的爆破的裂隙区影响范围;爆破孔的合理间距为7 m;爆破后钻屑量的测定结果均小于钻屑量的临界值,爆破后消除了煤体冲击地压的安全隐患,可以正常开采。

关键词: 煤矿, 预裂爆破, 液态CO2致裂技术, 巷道卸压

Abstract: In order to eliminate the potential safety problems of rockburst in Tingnan coal mine, liquid CO2 fracturing technology is adopted for pre-splitting blasting in hazardous areas. Through numerical simulation, effect of the control hole on the drilling blasting and the reasonable spacing of blasting hole in Tingnan coal mine are investigated, and the blasting performance is analyzed by the method of drilling bits. The results show that the control hole is favorable for the coal blasting, and the influence scope of crack area of the liquid CO2 blasting with control hole is significantly larger than that without blasting hole. The reasonable spacing of blasting hole in Tingnan coal mine is 7 m; After blasting, the measured amounts of drilling and cuttings are less than the critical values. The hidden danger of rock burst in coal blocks can be eliminated through blasting to realize normal mining.

Key words: Coal mine, Pre-splitting blasting, Liquid CO2 fracturing technology, Tunnel pressure relief