摘要
针对庞庞塔煤矿软岩顶板巷道具有跨度大、顶板松软、支护比较困难等问题,对切巷顶板采用注浆加固技术和顶板全锚索支护方案。现场钻孔窥视和锚索抗拉力试验结果表明:切巷顶板采用注浆加固效果理想,二次扩刷后切巷围岩顶板下沉量、底鼓量、顶底板移近量和煤帮鼓起量较小,切巷施工安全。
In order to solve the problems of large span,soft roof and difficult support in soft rock roof roadway in Pangpangta Coal Mine,grouting reinforcement technology and roof full anchor cable support scheme are adopted for cutting roadway roof.The results of on-site drilling snooping and anchor cable tension test show that the grouting reinforcement effect of cutting roadway roof is ideal,the surrounding rock roof subsidence,bottom heave,roof and floor moving and coal side bulging are relatively small after secondary expansion,and the construction of cutting roadway is safe.
作者
王鹏飞
Wang Pengfei(Shanxi Coking Coal Huozhou Coal Power Group Lvlin Energy Chemical Co.,Ltd,Shanxi Huozhou 031400)
出处
《山东煤炭科技》
2022年第4期40-42,共3页
Shandong Coal Science and Technology
关键词
大跨度
破碎
软岩
注浆
large span
broken
soft rock
grouting
