巨厚含水层补给采空区探放水技术应用

Application of water detection and water release technology in goaf replenished by huge thick aquifer

胡家河煤矿为单水平开采矿井,402盘区受A5向斜影响,导致该盘区已回采的402102及402103工作面采空区形成“V”字型积水区。根据物探成果402103采空积水区面积广、水量大,为消除积水区对即将回采的402104工作面造成的安全威胁,有针对性地开展了探放水工程。通过观测整个施工期间钻孔出水以及孔内水压变化情况,得出积水量与回采高度、空隙率等因素直接相对关系,为之后相似条件工作面回采后老空积水情况分析和疏放提供了技术依据,同时通过探放水工程解除了可能发生的透水灾害的威胁。

Hujiahe Coal Mine is a single horizontal mining mine, and 402 panel is affected by A5 syncline, which leads to the formation of V-shaped pools zone in the goaf of 402102 and 402103 working face.According to geophysical exploration results, 402103 goaf ponding area has a wide area and a large amount of water.In order to eliminate the security threat caused by the pools zone to the 402104 working face to be mined, a targeted water detection and water release project was carried out.Through the observation of the water outflow from the drilling holes and the change of water pressure in the drilling holes during the whole construction period, the direct relative relationship between the water accumulation and the mining height, porosity and other factors is obtained, which provides a technical basis for the analysis and drainage of the water accumulation in the goaf after the mining of the working faces under similar conditions.At the same time, the threat of possible water inrush disasters is removed through the water detection and water release project.