摘要
陕北侏罗系煤田坚硬顶板普遍存在,导致煤矿井下工作面初次来压步距大(40~70 m),易发生冲击矿压灾害事故,采用水力压裂技术进行切顶卸压可以有效减小工作面初次来压步距,进而避免发生冲击矿压灾害事故。为此,在总结我国现有水力压裂技术在煤矿井下工作面初采初放应用经验的基础上,提出坚硬顶板多层次立体化水力压裂技术,使用自主研发的钻割一体化设备,实现高效快捷的压裂孔定向割槽,并在陕西延长石油矿业有限责任公司魏墙煤业公司1313工作面开展水力压裂初采初放现场试验。观测结果表明,水力压裂处理后1313工作面直接顶初次垮落步距为9.6 m,老顶初次垮落步距为19.2 m,且冒落后的老顶完全充填采空区,大大降低了工作面老顶突然垮落造成的“飓风”性冲击灾害。
Hard roofs are common in the underground coalmines in the Jurassic coalfields in northern Shaanxi,China.The first weighting distance usually ranges from 40 m to 70 m,which is easy to induce dynamic disasters such as rock burst.By reviewing existing applications of the hydraulic fracturing technology used in Chinese coalmines,multi-level three-dimensional hydraulic fracturing was proposed to fracture the hard roof.The self-developed drilling-cutting integrated device was used to achieve efficient directional notch.Field test was conducted at the No.1313 working face of Weiqiang Coalmine of Shaanxi Yanchang Petroleum Group.In-situ observations showed that after hydraulic fracturing,the first weighting distances of the immediate and the main roofs of the No.1313 working face were 9.6 m and 19.2 m,respectively.Moreover,the caved rocks of the main roof fully filled the goaf area.This highly reduced the possibility of the dynamic disasters due to the sudden collapse of the main roof.This technology could guide the management of hard roof in coalmines with similar geological conditions.
作者
崔峰
崔魏
张勃阳
何青源
CUI Feng;CUI Wei;ZHANG Boyang;HE Qingyuan(Weiqiang Coal Industry Company,Shaanxi Yanchang Petroleum Mining Limited Company,Yulin 719100,Shaanxi,China;Hanjiawan Coal Co.,Ltd.,Shaanxi Shanmei Nrothern Shaanxi Coal Mining Industry Limited Company,Yulin 719315,Shaanxi,China;School of Energy Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,Henan,China;School of Mines,China University of Mining and Technology,Xu-zhou 221116,Jiangsu,China)
出处
《河南理工大学学报（自然科学版）》
CAS
北大核心
2022年第5期32-37,共6页
Journal of Henan Polytechnic University（Natural Science）
基金
国家自然科学基金资助项目(51974293)
江苏省青年科学基金资助项目(BK20180658)。
