侏罗系3₋₁煤层顶板砂岩水疏放性评价及采空积水防治

Evaluation of Drainage Water from the Roof Sandstone Aquifer above Jurassic 3₋₁ Coal Seam and Prevention of Water-Ponding in the Goaf

我国西北地区侏罗系煤层开采过程中受顶板砂岩含水层危害较为严重,评价砂岩含水层疏放性并有效探放采空区积水对煤矿安全生产具有重要意义。以泊江海子矿为例,在分析水文地质条件基础上,结合工程实际,从单个探放水孔残余水量、检验孔效果、残余水头与物探效果等方面进行疏放性评价。此外,统计了一盘区各工作面采空积水的探放情况,并提出采空积水的探放水措施,为后续工作面安全回采提供地质保障。

In the process of Jurassic coal seam mining in Northwest China, the damage of roof sandstone aquifer is more serious. It is of great significance to evaluate the drainage of sandstone aquifer and effectively explore the water accumulation in goaf for coal mine safety production. Taking Bojianghaizi Mine as an example, based on the analysis of hydrogeological conditions and combined with engineering practice, the drainage evaluation is carried out from the aspects of residual water volume of single exploration and drainage hole, inspection hole effect, residual water head and geophysical prospecting effect. In addition, the exploration and drainage of goaf water in each working face of a panel are counted, and the exploration and drainage measures of goaf water are put forward to provide geological guarantee for the safe mining of subsequent working faces.