摘要
针对下石节煤矿+950 m轨道石门肩窝内突、底鼓量大、两帮强烈内移的变形特征,在分析了高应力节理裂隙围岩大变形机理的基础上,提出了高预紧力锚网支护+关键部位二次加固+底板锚网索支护技术。井下试验结果表明,该巷道围岩累计变形量较小,该技术方案可行。
For the humeral pits of the 950 m crossheading had sunk seriously,the floor had bulged intensely and the sides had moved into the internal of the roadway strongly at Xiashijie mine,then based on the large deformation mechanism analysis of the jointed surrounding rock with high stress,the support technology of high-preload bolt-mesh-anchor and secondary reinforcement of the key position was proposed with the floor supported additionaly. The scheme was also applied to the underground test. Field testing proved that small amount of deformation of surrounding rock had taken place and that the feasibility of the technology program was confirmed.
出处
《煤炭技术》
CAS
北大核心
2017年第1期26-28,共3页
Coal Technology
基金
煤炭资源与安全开采国家重点实验室自主研究课题基金资助项目(SKLCRSM08X01)
关键词
围岩大变形
高预紧力
锚网支护
large deformation of surrounding rock
high-preload
bolt-mesh support
