摘要
为解决煤炭资源回收率低、采掘接替紧张及煤柱应力集中问题,以降本提效、安全生产为目标,在荣康煤矿11004工作面开展了切顶留巷无煤柱开采技术研究。基于“切顶短臂梁”理论提出了荣康煤矿无煤柱自成巷技术工艺流程;在此基础上,通过理论分析对试验工作面切顶参数进行了设计,确定了顶板预裂爆破切缝、顶板补强支护及动压区域加强支护关键参数,并采用离散元数值模拟方法对切顶留巷效果进行模拟验证;开展了现场工程试验并对支护结构受力及围岩变形进行了矿压监测。研究结果表明,采用切顶留巷无煤柱开采技术卸压效果明显,围岩变形较小,留巷可以满足安全生产要求。
In order to solve the problems of low coal resource recovery rate,tight mining succession,and coal pillar stress concentration,with the goal of reducing costs,improving efficiency,and ensuring safe production,a study on no coal pillar mining with roof cutting and entry retaining is carried out in the 11004 working face of Rongkang Coal Mine.Based on the theory of“cutting top short arm beam”,the technological process of the no pillar mining in Rongkang Coal Mine is proposed.On this basis,the roof cutting parameters of the experimental working face are designed through theoretical analysis,and the key parameters of roof pre splitting blasting,roof reinforcement support,and dynamic pressure area reinforcement support are determined.The discrete element numerical simulation method is used to verify the effects of roof cutting and roadway retaining.And conducted on-site engineering tests and monitored the stress on the support structure and the deformation of the surrounding rocks.The results show that the pressure relief effects of using the new no coal pillar mining technology is obvious,and the deformation of surrounding rock is small.The retaining entry can meet the requirements of safety production.
作者
李永进
王英豪
杨玉华
盖秋凯
张星星
高玉兵
LI Yongjin;WANG Yinghao;YANG Yuhua;GAI Qiukai;ZHANG Xingxing;GAO Yubing(Shanxi Jinmei Group Hongdong Jinsheng Rongkang Coal Industry Co.,Ltd.,Linfen 041600,China;State Key Laboratory for Geomechanics and Deep Underground Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China;School of Mechanics and Civil Engineering,China University of Mining and Technology-Beijing,Beijing 100083,China)
出处
《中国矿业》
2023年第S01期288-294,共7页
China Mining Magazine
基金
深部岩土力学与地下工程国家重点实验室(北京)创新基金项目资助(编号:SKLGDUEK202206)。
关键词
切顶卸压
沿空留巷
无煤柱开采
预裂爆破
roof cutting and pressure release
gob-side entry retaining
non pillar mining
roof presplit blasting
