摘要
针对常村煤矿S3-3孤岛工作面所处大埋深、高地应力、破碎顶煤的围岩特点和巷道严重变形、锚杆锚索断裂严重的现状,研究出了高强让压锚杆,并对普通高强锚杆、强力锚杆、让压锚杆支护巷道在现场进行实测。研究表明,高强让压锚杆能够既让压又有高强锚固力,避免了高应力作用下杆体断裂,减少了巷道维护量,有效解决高地应力下巷道支护难题。
On the S3-3 isolated working face of Changcun mine,the surrounding rocks are characteristic of large buried depth,high geostress and broken top coal;the roadways deformation and bolt-anchor fractures are severe.To solve the problems,a high-strength yielding bolt is presented.The normal high-strength bolt,powerful bolt,and yielding bolt are also tested in site.The results show that the high-strength yielding bolt not only is yieldable,but also has high-strength anchoring force,which can avoid bolt breaking under high stress,reduce roadway maintenance work,and solve the supporting problems under high geostress.
出处
《山西煤炭》
2012年第7期43-45,共3页
Shanxi Coal
关键词
巷道支护
高强让压锚杆
强力锚杆
孤岛综放面
roadway support
high-strength yield bolt
powerful bolt
isolated fully-mechanized mining faces
