宁夏红石湾煤矿涌水量评价

在分析红石湾煤矿区地质及水文地质条件的基础上,对矿井的充水因素进行了论述,认为区内的古近系孔隙水含水层分布广,厚度大,富水性较强,但由于其距首采区的主采煤层(三煤)较远,导水裂隙带的最大破坏高度尚未达到该含水层,且其间有近20m厚的隔水层,所以该含水层对煤矿开采影响较小;影响区内煤矿涌水量的主要含水层为二叠系石盒子组砂岩含水层和山西—太原组砂岩含水层。采用富水系数比拟法、狭长水平巷道水动力学法、大井法对煤矿涌水量进行了计算,通过对各种计算方法适应性的评述及计算结果的对比,最后选用狭长水平巷道水动力学计算结果作为矿井正常涌水量,大井法计算结果作为矿井的最大涌水量。

Mine Inflow Evaluation in Hongshiwan Coalmine,Ningxia

Based on the Hongshiwan coalmine geological and hydrogeological conditions analysis,discussed mine water infilling factors,considered that the Paleogene pore water aquifer in the area is widespread and has large thickness and strong water yield property.But since it is far apart from main mineable coal seam（No.3 coal） in the first winning district,water conducted zone maximum height has not reach the aquifer and an about 20m thick aquifuge between them,thus the aquifer has rather small impact on coal mining.Main aquifer impacts coalmine water inflow is Permian Shihezi Formation sandstone aquifer and Shanxi Formation and Taiyuan Formation sandstone aquifer.To use water content coefficient analogue method,long and narrow level drift hydrodynamic method and virtual large-diameter well method carried out mine inflow computation.Through adaptability appraisal and computed results balancing of each methods,finally result of long and narrow level drift hydrodynamic method is selected as normal mine inflow,while the result of virtual large-diameter well method as maximum mine inflow.