回采巷道锚注加固超前支护技术研究
Advance Support Technology of Anchorage Injection Reinforcement in Mining Roadway
刘凯峰1
作者信息
- 1. 晋能控股煤业集团永定庄煤业公司,山西大同 037024
- 折叠
摘要
针对永定庄矿复杂地质条件下回采巷道超前支护效率低的问题,以该矿 8203 工作面为工程背景,设计采用注浆锚索代替液压支柱的支护方案,通过数值模拟对不同锚索预紧力及间排距下的巷道垂直应力进行分析,从而得出最佳的锚索预紧力为150 kN,最佳间排距为1 800 mm×900 mm.通过现场应用,发现注浆锚索支护受力最大值小于 100 kN,处于安全合理范围内,因此锚注加固超前支护方案可行,可以为地质条件类似的巷道支护提供参考.
Abstract
Aiming at the low support efficiency of mining roadway under complex geological conditions in Yongdingzhuang Coal Mine,taking 8203 working face of the mine as the engineering background,a support scheme using grouting anchor cable instead of hydraulic prop was designed,and the vertical stress of roadway under different pretightening force and row spacing of anchor cable was analyzed by numerical simulation.Thus,the optimum cable pretightening force of 150 kN and the optimum row spacing of 1 800 mm×900 mm were given.Through the field application,it was found that the maximum force of the grouting anchor cable support was less than 100 kN,which was within the safe and reasonable range.Therefore,the advance support scheme of anchorage injection reinforcement is feasible and can provide reference for the support of roadways under similar geological conditions.
关键词
高应力/回采巷道/联合支护/数值模拟Key words
high stress/mining roadway/combined support/numerical simulation引用本文复制引用
出版年
2024
NETL
NSTL
万方数据