摘要
岩浆岩坚硬难冒,顶板管理比较困难。莱芜熠能矿业有限公司东井4煤层顶板侵入岩浆岩厚度达到18m,能否实现长壁垮落法安全开采成为制约4煤层开采效益的关键。文章从直接顶垮落、老顶稳定性及来压强度等方面对长壁开采的安全性进行了分析,提出了安全回采的顶板控制方案。
The pyrogenetic rock is hard. It＇s difficult for roof caving. In the paper, the safety of long wall mining was analyzed from some aspects, such as caving of nether roof, stability of main roof and pressure strength etc. The program of roof control for safe mining was pointed out.
出处
《煤炭技术》
CAS
北大核心
2009年第8期74-75,共2页
Coal Technology
关键词
岩浆岩
安全回采
支护控制
pyrogenetic rock
safe mining
support control
