陕西煤炭2024，Vol.43Issue(8)：128-133,6.DOI:10.20120/j.cnki.issn.1671-749x.2024.0825
小煤柱沿空掘巷支护技术实践
Support technology for small coal pillars driving roadway along goaf
杨华富 1沈建廷 1张彦宽 1宁兆坡2
作者信息
- 1. 大方绿塘煤矿有限责任公司,贵州毕节 551604
- 2. 山东能源集团贵州矿业有限公司,贵州贵阳 551499
- 折叠
摘要
Abstract
In order to address the difficult support problem of small coal pillars driving roadway along goaf,we take the small coal pillars driving roadway along goaf of the 26mid06 working face in the Dafang Lvting Coal Mine as the engineering back-ground.Through field observations and theoretical analysis,the occurrence of coal seams and the surrounding rock structure are explored,and the causes of deformation and failure of the roadway are identified as low strength and poor integrity of the coal-rock mass,unreasonable support parameters,and dynamic pressure effects.Based on the geological conditions of the 26mid06 working face,optimized support design schemes and reinforcement support designs are proposed and industrially ap-plied on-site.The results of on-site monitoring show that with the implementation of the optimized support design scheme,the maximum convergence of the roof and floor of the roadway is 130 mm,which is about 54％lower than that under the original support scheme.The deformation of the roadway is within a controllable range,indicating the achievement of the expected support effect and verifying the feasibility and effectiveness of the optimized design.关键词
小煤柱/沿空掘巷/注浆加固/围岩变形/支护设计Key words
small coal pillar/driving roadway along goaf/grouting reinforcement/surrounding rock deformation/support de-sign分类
矿业与冶金引用本文复制引用
杨华富,沈建廷,张彦宽,宁兆坡..小煤柱沿空掘巷支护技术实践[J].陕西煤炭,2024,43(8):128-133,6.
