摘要
为分析大断面煤层回风大巷破坏原因,采用应力解除法在2号煤回风大巷进行了地应力测试,提出了强力锚杆加深浅注浆的锚喷注联合支护方案。新方案应用后,巷道变形缓慢,变形速率小,巷道两帮移近量74 mm、顶板下沉量98 mm。
In order to analyze the failure causes of return air roadway in large section coal seam, the in-situ stress test is carried out in return air roadway of the No. 2 coal seam by stress relief method, and the bolt shotcrete combined support scheme of strong bolt and deep and shallow grouting is put forward. After the application of the new scheme,the roadway deformation is slow, the deformation rate is small, the two sides move closer by 74 mm and the roof subsidence is 98 mm.
作者
王文
Wang Wen(Jinneng Coal Industry Co.,Ltd.of Huozhou Coal Electricity Group,Shanxi Jingle 035100)
出处
《山东煤炭科技》
2021年第10期18-21,共4页
Shandong Coal Science and Technology
关键词
煤层
巷道
支护
coal mine
roadway
support
