煤矿安全2019，Vol.50Issue(10)：88-92,5.DOI:10.13347/j.cnki.mkaq.2019.10.020
深井大断面双巷布置回采巷道破坏机制及控制技术
Damage Mechanism and Control Technology of Mining Roadway with Large Cross Section and Double Roadway Layout in Deep Mine
摘要
Abstract
In order to solve the problem of surrounding rock control during the second mining period of the mining roadway with large cross-section and double roadway layout in deep mine, taking 6203 working face air return roadway of Liuzhuang Coal Mine as the engineering background, firstly, the deformation characteristics of roadway were analyzed based on the actual observation. That is to say, roadway deformation during stoping shows that floor heave is larger than roof subsidence, coal pillar wall deformation is much larger than the asymmetric shape of solid coal wall, and roadway floor and coal pillar wall rock deformation is the most serious. On this basis, the influences of roadway pillar, surrounding rock stress, surrounding rock strength and support form on roadway floor heave are analyzed. It is considered that the small size of coal pillar and unreasonable supporting parameters are the main causes of roadway failure and deformation. The bottom heave control technology of changing the size of coal pillar, optimizing the supporting parameters of roadway, local grouting and setting unloading pressure trough is proposed. The engineering practice shows that the new support scheme can effectively control the roadway surrounding rock and has good safety, technical and economic benefits.关键词
深井/大断面/双巷布置/煤柱/支护参数/控制技术Key words
deep mine/large section roadway/double roadway layout/coal pillar/support parameters/control technology分类
矿业与冶金引用本文复制引用
贺心燕,宁掌玄..深井大断面双巷布置回采巷道破坏机制及控制技术[J].煤矿安全,2019,50(10):88-92,5.基金项目
大同市科技发展计划资助项目(2018017) （2018017）
