顾倩悦,曹安业,杨耀,边戈,赵卫卫,高红兵,李庚,刘彦强

• 1:中国矿业大学矿业工程学院
• 2:陕西长武亭南煤业有限责任公司

摘要(Abstract)：

针对陕西某矿赋存高位厚硬顶板,已有技术难以实现井下直接整层弱化导致冲击地压频发的难题,提出一种高位钻场长钻孔爆破厚硬顶板防治冲击地压技术。采用理论分析、数值模拟等研究方法,分析了该技术卸压降载机制,确定了其布置参数与层位,并在该矿2412工作面开展了工程实践。结果表明:长距离钻孔爆破技术是通过在高层位顶板布置钻场实现厚硬顶板整层预裂,达到卸压降载的目的;设计正交试验确定了长距离钻孔爆破卸压效果的主控影响因素为爆破层位;根据煤矿覆岩主控诱灾层位识别方法,判定2412工作面煤层上方52～67 m处为爆破层位,根据工作面开采期间周期来压步距及爆破围岩裂隙发育半径,确定炮孔间距为30 m。工程实践表明,施工长距离钻孔爆破后微震事件频次及能量均有所降低,巷道变形量减小,与传统顶板深孔爆破技术相比,长距离钻孔爆破技术的卸压范围更大,效果更显著。研究结论可为类似条件矿井在生产期间,从源头对高层位、难卸压的厚硬顶板进行降载卸压防治冲击地压提供参考。

关键词(KeyWords)： 厚硬顶板;冲击地压;长距离钻孔爆破;正交试验;防治技术

Abstract:

Keywords:

基金项目(Foundation): 国家重点研发计划资助项目(2022YFC3004603);; 国家自然科学基金资助项目(52274098,U21A20110);; 江苏省创新支撑计划国际科技合作/港澳台科技合作-重点国别产业技术研发合作资助项目(BZ2023050)

作者(Author): 顾倩悦,曹安业,杨耀,边戈,赵卫卫,高红兵,李庚,刘彦强

DOI: 10.13532/j.jmsce.cn10-1638/td.2024-1443

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