大埋深沿空掘巷非对称支护技术的数值模拟研究
Numerical simulation of asymmetric support technology in roadway excavation along goaf with large buried depth
杜乐乐1
作者信息
- 1. 冀中能源股份有限公司邢东矿,河北邢台 054000
- 折叠
摘要
针对充填开采沿空巷道支护过程中的非对称性大变形难题,以邢东矿11216运料巷为实例,运用数值模拟确定不同支护方案下的预应力场分布特征.模拟结果表明,综合考虑支护效果和成本,顶锚索呈"3-3-3"排布、实体煤帮锚索为双排排布、煤柱帮锚索为单排排布的支护方案最好.现场围岩形变观测结果表明,支护方案能够有效控制巷道形变.
Abstract
Aiming at the problem of large asymmetric deformation in the supporting process of goaf roadway in filling mining,the distribution characteristics of prestressed field under different supporting schemes were determined by numerical simulation with the case of No.11216 transport roadway in Xingdong Mine.The simulation results showed that,considering the support effect and cost comprehensively,the top cable arrangement was 3-3-3,the solid coal wall cable arrangement was double,and the coal pillar wall cable arrangement was single.The in-situ deformation observation results of surrounding rock showed that the support scheme could effectively control the deformation of roadway.
关键词
大埋深/充填开采/沿空掘巷/非对称形变/顶锚索布置/帮锚索布置/偏心距Key words
large burial depth/filling mining/roadway excavation along goaf/asymmetric deformation/top cable arrangement/help anchor cable layout/eccentricity引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据