大倾角煤系地层砂岩承压裂隙水水害因素分析

Analysis of Water Hazard Factors in Confined Fractures of Sandstone in Coal-bearing Strata with Large Inclination Angle

以唐家河煤矿+150 m措施水仓掘进过程中发生的砂岩承压裂隙水为例,对涌水裂隙条带和水害因素进行了分析,指出受大倾角煤系地层砂岩承压裂隙分布特征控制,随倾斜地层标高的变化,1#煤层底板砂岩涌水规律呈现出承压性、分布的非均匀性、水力联系的呈带性等特点,相同层位、相近位置的下水平采掘工程对上水平起着明显的泄水作用。其涌水主要通道为呈南北方向条带状分布的砂岩裂隙带。为矿井水患治理提供技术依据和思路。

Taking the confined fractured water of sandstone occurring during the excavation of the +150 m measure sump in Tangjiahe coal mine as an example,analyzed the fractured water inflow zones and water hazard factors,and pointed out that controlled by the distribution characteristics of confined fractured sandstone in coal measures strata with large dip angle,with the change of inclined strata elevation, the water inflow law of sandstone in No.1 coal seam floor presents the characteristics of confining, nonuniformity of distribution and non-hydraulic connection is zonal and other characteristics,the same horizon,similar location of the lower level of excavation works on the upper level plays an obvious drainage role.The main channel of water inflow is sandstone fracture zone with strip distribution in north-south direction. Provide technical basis and ideas for mine flood control.