摘要
为解决区段煤柱资源浪费、工作面生产接续紧张的问题,于塔山煤矿8304工作面引入快速无煤柱自成巷技术。首先,对切顶卸压无煤柱自成巷技术的工艺流程及工序时空关系进行总结,以此为基础将围岩结构分为煤体支撑区、动压承载区、成巷稳定区。随后,以该工作面中厚煤层复合顶板地质条件为基础,分别对顶板切缝、聚能爆破、恒阻锚索支护、挡矸支护、临时支护以及松动爆破六项关键技术相关参数进行设计。最后,通过数模模拟、现场监测对相关设计的技术效果进行分析、验证。现场留巷实践显示,最终留巷顶底移近量为261mm,两帮收缩量为390mm,有效断面尺寸为2839mm×4610mm,足以满足相邻工作面回采复用需求。
In order to solve the problems of the waste of coal pillars and the limitation of working faces,the rapid gob-side entry retaining technology by roof cutting and pressure releasing was introduced into the 8304 working face of Tashan coal mine. The technological process and the space-time relationship of the new gob-side entry retaining technology were summarized,based on which the surrounding rock structure was divided into coal support zone,dynamic pressure zone and lane stable zone. Taking 8304 working face as an example with composite roof and medium thick coal seam,the relevant parameters of six key technologies including roof cutting,shaped blasting,constant resistance anchor cable support,retaining support,temporary support and loose blasting were respectively designed. The technical effects of related designs were verified by numerical simulation and field test. The practice results show that the ultimate convergence of the roof and the bottom of the roadway is 261 mm,the shrinkage of the two sides of the roadway is 390 mm,the effective section size of the roadway is 2
作者
何满潮
马新根
牛福龙
王炯
刘雨兴
HE Manchao;MA Xingen;NIU Fulong;WANG Jiong;LIU Yuxing(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;Tashan Coal Mine Co. Ltd.,Datong Coal Mine Group,Datong,Shanxi 037000,China)
出处
《岩石力学与工程学报》
EI
CAS
CSCD
北大核心
2018年第12期2641-2654,共14页
Chinese Journal of Rock Mechanics and Engineering
基金
国家重点基础研究发展计划资助项目(2016YFC0600900)
国家自然科学基金青年基金项目(51404278)~~
关键词
采矿工程
切顶卸压
自动成巷
中厚煤层
复合顶板
松动爆破
适应性研究
839 mm×4 610 mm,and the remained roadway is sufficient to meet the reuse requirement of adjacent working faces.mining engineering
roof cutting and pressure releasing
roadway formed automatically
mediumthick coal seam
composite roof
loose blasting
adaptability research
