摘要
以祁东煤矿8224工作面沿空留巷为研究对象,在对沿空留巷数值模拟的基础上,分析了所留巷道围岩的应力分布、变形特征及破坏机理,并提出相应的加固技术。实践证明:"锚注+锚索+锚杆"这种联合加固技术能保证留巷成功,有效的解决了工作面瓦斯超限难题,实现了高瓦斯煤层安全开采,取得了较好的社会经济效果。
Taking gob-side entry retaining of 8224 working face in Qidong Coal Mine as the study object,we made numerical simulation for gob-side entry retaining,analyzed stress distribution,deformation characteristics and failure mechanisms of the roadway,and proposed a corresponding reinforcement technology.Experience has proved that the combined supporting with bolting-shotcreting-grouting can guarantee the roadway which was left successfully,and effectively solve the problem of gas overrun at working face,realized safety mining at high gas coal seam,and got better social economic effects.
出处
《煤矿安全》
CAS
北大核心
2015年第2期132-135,共4页
Safety in Coal Mines
基金
国家自然科学基金资助项目(51274010)
国家自然科学基金重点资助项目(51134012)
高等学校博士学科点专项基金资助项目(20103415110002)
关键词
软弱岩层
沿空留巷
破坏机理
加固技术
数值模拟
soft rock
gob-side entry retaining
failure mechanism
reinforcement technology
numerical simulation
