论文部分内容阅读
由于深部巷道变形破坏严重,传统支护难以保证巷道稳定。本文在详细分析深部巷道围岩变形特征的基础上,提出深部巷道连续双壳加固理念,并分析双壳加固机理。通过相似材料模拟试验,对不同采深条件下裸巷、锚杆支护、连续双壳支护巷道围岩变形及应力分布规律进行研究。结果表明:随采深增大,裸巷围岩发生大面积整体破坏,不能自稳;锚杆支护巷道锚固区以里深部围岩继续发生离层破坏,巷道存在潜在破坏危险;连续双壳支护巷道只在巷帮浅部发生局部剪切破坏,围岩稳定性好。以陶二煤矿新南总巷道支护为例,验证了连续双壳支护的合理性。
Due to the serious deformation of the deep roadway, the traditional support is difficult to ensure the stability of the roadway. Based on the detailed analysis of the deformation characteristics of surrounding rock in deep tunnel, this paper proposed the concept of continuous double-shell reinforcement in deep tunnel and analyzed the double-shell reinforcement mechanism. Through the simulation test of similar materials, the deformation and stress distribution of surrounding rock of roadway with bare roadway, bolt support and continuous double-shell support under different mining conditions were studied. The results show that with the increase of mining depth, the whole area of bare roadway is damaged in a large area and can not be self-stabilized. The anchoring area of bolt supporting roadway continues to delaminate and break down in deep and deep surrounding rock, Supporting the roadway only in the shallow part of the top of the road to cause partial shear damage, good stability of the surrounding rock. A case study of Xin’nan main roadway in Tao’er coal mine is carried out to verify the rationality of continuous double hull support.