软弱夹层复合顶板动压巷道支护技术研究  

Study on Support Technology of Dynamic Pressure Roadway Support in Soft and Weak Interlayer Composite Roof

作　　者：任硕 周逸群[1,2] 王鹏飞 REN Shuo;ZHOU Yi-qun;WANG Peng-fei(CCTEG Coal Mining Research Institute,Beijing 100013,China;Coal Mining and Designing Department,Tiandi Science and Technology Co.,Ltd.,Beijing 100013,China;School of Mines,China University of Mining and Technology,Xuzhou 221116,China;Shanxi Qinxin Coal Industry Co.,Ltd.,Changzhi 046502,China)

机构地区：[1]中煤科工开采研究院有限公司,北京100013 [2]天地科技股份有限公司开采设计事业部,北京100013 [3]中国矿业大学矿业工程学院,江苏徐州221116 [4]山西沁新煤业有限公司,山西长治046502

出　　处：《煤炭技术》2021年第8期32-36,共5页Coal Technology

基　　金：天地科技股份有限公司科技创新创业资金专项项目(2020-TD-QN009)。

摘　　要：以沁新煤矿2210顺槽软弱夹层复合顶板为研究对象,用数值模拟手段对3层复合顶板锚杆预应力场分布规律进行研究,揭示了围岩在软硬不同岩性岩石中的应力传递效果,认为应将锚固段置于硬岩中,有利于锚杆应力在结构面处的扩散,发挥锚杆的支护作用。根据沁新煤矿2210顺槽实际情况,设计“动态锚固-应力扩散”的支护方案,通过矿山安全性监测表明巷道支护效果良好,形成较好的工程示范效果。Taking 2210 soft intercalated composite roof as the research object, the distribution law of bolt prestress field in three-layer composite roof strata is analyzed by numerical simulation, and the stress transfer effect of surrounding rock in soft and hard rock with different lithology is revealed. It is considered that the anchoring section should be placed in hard rock, which is conducive to the diffusion of bolt stress in structural plane and plays the supporting role of bolt. According to the actual situation of 2210 gateway in Qinxin coal mine, the supporting scheme of "dynamic anchoring stress diffusion" is designed. The mine safety monitoring shows that the roadway supporting effect is good, and it can provide a useful reference for the similar weak interlayer composite roof dynamic pressure roadway supporting.

关 键 词：复合顶板 软弱夹层 动压巷道 巷道支护 

分 类 号：TD353[矿业工程—矿井建设]