利用脆性岩石含量指数预测裂隙型含水层富水区

Research on predicting water-rich area of fissueed aquifer by studying brittle rock percentage composition

裂隙型含水层因其裂隙连通性较差,常规的矿井涌水量预计方法有时不适用。利用脆性岩石含量指数划分强、弱富水区不失为一种新的方法。一定厚度的地层内脆性岩石所占的比例越大,则受力后越容易产生张性裂隙,充水空间较发育,相应地其富水性也越强。本文将脆性岩石厚度占地层总厚度的百分比定义为脆性岩石含量指数,通过脆性岩石含量指数划分砂岩裂隙型含水层富水区。脆性岩石含量指数法不仅能进行富水性定性分区,结合已采区涌水量资料也可尝试进行未开采区涌水量预计,这为矿井防治水工作以及防排水系统的设计提供了一种新的技术支持。

Conventional prediction of water discharge in sandstone-rich coal mine is inapplicable because of poor sandstone crevice connectivity.Predicting aquifer aqueous area and non aqueous area by brittle rock percentage composition is a new applicable method.The bigger the brittle rock percentage the stratum is,the easier for tensile crevice to develops.The more water space develops,the more aqueous sandstone aquifer is.In this paper,the brittle rock percentage composition is defined as ratio of total stratum thickness to brittle rock thickness.The sandstone crevice aquifer water-rich area is partitioned by percentage composition.The water discharge of un-mined working face can be computed according to the brittle rock percentage composition of the mined working face,which provides a new method for preventing and controlling water disaster and designing drainage system.