双翼开采条件下煤层大巷稳定性控制技术

Stability control technology of coal seam main roadway under double wing mining conditions

针对黄陵二号煤矿四盘区大巷破坏失稳情况,采用理论分析以及现场工业性实验方法,分析了四盘区大巷失稳破坏特征以及影响因素,提出了"壁后注浆+巷道断面扩刷+永久支护+二次注浆加固"的修复加固技术,实测表明该技术确保了四盘区大巷破坏失稳段的围岩稳定,达到了工程目的,实现了四盘区工作面的安全高效开采。该技术的成功应用,对该矿以及类似地质条件下巷道支护提供了工程实例。

Based on the theoretical analysis and field industrial experiment,the failure characteristics and influencing factors of the main roadway in fourth mining area were analyzed,and the repair and reinforcement technology of behind wall grouting,roadway section expansion,permanent supporting and secondary grouting reinforcement was put forward.Field application shows that the technology ensures the stability of the main roadway in fourth mining area,and achieves safety and efficient mining of fourth mining area,which provide reference for the roadway support under similar geological conditions.