采矿与安全工程学报2011，Vol.28Issue(1)：90-95,6.
岩体结构与地面瓦斯抽采井稳定性的关系
Relationship Between Rock Mass Structure and Stability of Surface Well for Released Coal Gas
摘要
Abstract
Based on data from protective seam mining and engineering practices of surface well for released gas drainage, combined with the through-hole and logging, we didvide the deformation and failure of well casing into two types: 1) the casing failure caused by plastic deformation inside the rock mass in looser layer, and 2) the deformation or the failure caused by slippage of the rock mass along the weak structural surface in bed rock. The results show that the clay layer generally deforms plastically for its great thickness, low intensity and high compression. The horizontal shear occurs firstly in the mechanical weak surface such as lithological interrace in bedrock formation, and then the casing is broken. Finally, we proposed some possible preventive measures for the casing failure in high-risk section supported by the rock mass structure.关键词
岩体结构/黏土层/岩性交界面/滑移/挤压/剪切/预防措施Key words
rock mass structure/ clay layer/ lithological interface/ slippage/ compression/shear/ preventive measures分类
矿业与冶金引用本文复制引用
徐宏杰,桑树勋,韩家章,黄华州,程志忠,任波..岩体结构与地面瓦斯抽采井稳定性的关系[J].采矿与安全工程学报,2011,28(1):90-95,6.基金项目
国家高技术研究发展计划(863)项目(2007AA06Z220) （863）
教育部科学技术研究重大项目(307014) （307014）
