论文部分内容阅读
华北煤田石炭二叠纪煤系地层底部存在着含水丰富的奥陶纪石灰岩 .开采实践表明 ,一旦煤层与奥灰之间的隔水层内存在地质构造或煤层开采引起底板岩体破坏 ,可能会在煤层和含水层之间形成导水带 ,从而诱发突水 .介绍了分层开采对底板岩石渗透性影响的试验成果 ,并进行了详尽的分析 ,获得了分层开采对煤层底板岩体渗透性的影响规律 .
The Ordovician limestone with abundant water is found at the bottom of the Carboniferous Permian coal measure strata in the North China Coalfield, and mining practice shows that once the geological structure or the rock mass destruction in the aquifuge between the coal seam and the Ordovician can lead to the destruction of the rock mass, The water conduction band is formed between the coal seam and the aquifer to induce water inrush.The experimental results of the effect of stratified mining on the permeability of the rock of the floor are introduced and detailed analysis is carried out to obtain the effect of stratified mining on the rock mass permeability of coal seam floor The law of sexual influence.