摘要
采用数值模拟，研究了急倾斜特厚煤层开采导致覆岩破坏及雨水在塌陷区和断层中的渗流演化规律．结果表明，在一定开采深度内，围岩的破坏高度随开采深度的增加而增加，当超过一定深度时，覆岩的破坏高度增加幅度变小，破坏范围主要在横向上扩展．导水断裂带与地表断裂带的沟通以及在地表露头的开放型断层成为雨水入渗井下的主要途径，随着煤层开采深度的增加，围岩水平应力增加形成岩层裂隙愈合以及断层闭合，在一定程度上阻止了雨水入渗，这与近水平煤层雨水的入渗规律不同．
Employed numerical simulation to study the failure law of the hanging strata and the rain seeping evolution law in collapsed zone with the presence of a few faultsduringmining of the high steep thick coal seam. The resuit indicates that the failure height of the strata increases very quickly with the mining depth when mining at shallow depth, and the trend decreases a little degree after some depth. There are two main seeping paths, one is the outcrop of open faults, and the other is cracks in the earth surface connecting with transmitting water zone. As the mining depth increasing, the increase of horizontal stress in up strata gives rise to the close of cracks in wall rocks and compacts faults to some degree so that rain water can＇t seep through the failure zone. The failure process of the hangingstrata and seeping of the rain water in very steep coal seam is very different from in approximately horizontal coal seam.
出处
《煤炭学报》
EI
CAS
CSCD
北大核心
2005年第B08期5-9,共5页
Journal of China Coal Society
关键词
急倾斜
塌陷区
渗流
演化
high steep
collapsed zone
seeping
evolution
