摘要
为解决冲击地压煤层高集中应力疏解难题,提出了煤层水力扩孔掏槽高效卸压技术,对孟村煤矿401103回采工作面冲击致灾因素进行了研究。结果表明,煤层内静载荷是诱发冲击的基础条件,高集中应力降低了冲击地压发生门槛;提前对坚硬煤层进行水力扩孔掏槽卸压处理,煤层强度和完整性大大降低。在水力扩孔掏槽作业下,煤层内积聚能量大幅下降,应力保持在较低水平,围岩积聚能量有序释放,冲击风险显著降低。
In order to solve the problem of high concentrated stress relief in coal seam with rock burst,an efficient pressure relief technology of hydraulic reaming and cutting in coal seam was proposed,and the factors causing rock burst in No.401103 Face of Mengcun Mine were studied.The results showed that the static load in coal seam was the basic condition to induce rock burst,and the high concentrated stress reduced the threshold of rock burst.The strength and integrity of coal seam were greatly reduced by hydraulic reaming and cutting pressure relief treatment in hard coal seam in advance.Under the hydraulic reaming and cutting operation,the accumulated energy in the coal seam was greatly reduced,the stress was maintained at a low level,the accumulated energy of the surrounding rock was released in an orderly manner,and the impact risk was significantly reduced.
作者
胡沛
马文涛
王冰
冯美华
李海江
Hu Pei;Ma Wentao;Wang Bing;Feng Meihua;Li Haijiang(Shaanxi Binchang Mengcun Mining Co.,Ltd.,Xianyang 712000,China;CCTEG Coal Mining Research Institute,Beijing 100013,China)
出处
《煤炭与化工》
2025年第8期20-24,共5页
Coal and Chemical Industry
基金
国家重点研发计划(2022YFC3004604)
国家自然科学基金面上项目(52174186)。
关键词
冲击地压煤层
水力扩孔掏槽
高效卸压
防治冲击地压
rock burst coal seam
hydraulic reaming cutting
high efficient pressure relief
prevention of rock burst
作者简介
胡沛(1984-),男,陕西合阳人,高级工程师。
