“L型”疏放水系统构建及其在松散层防治水中的应用

Construction of"L-type"drainage system and its application in prevention and control of water in loose layers

矿井突水在矿井生产中始终是一个安全隐患,特别是对于顶板松散含水层,处理不当可能会发生溃水溃砂事故。为确保研究区薄基岩厚松散含水层下煤层的安全开采,采用疏降或疏干含水层水是一种有效方法,但井下疏放受松散含水层塌孔影响无法顺利实施。以赵家寨矿为例,通过“L型”顶板水疏放系统构建,将上覆新近系松散含水层水由顶板水转化为底板水,从井下巷道排出,解决了薄基岩厚松散含水层下煤层综放开采问题,实现了工作面的安全回采。该技术的成功应用,对类似水文地质条件下的煤层开采具有推广价值。

Mine water inrush is always a safety hazard in mine production,especially for the water in the roof loose aquifer.Not being handled properly,it may cause water and sand inrush.In order to ensure the safe mining of coal seams under the loose aquifer of thin bedrock in the study area,it is an effective method to drainage or dewatering the aquifer water,but the underground drainage cannot be successfully implemented due to the collapse of the loose aquifer.Taking Zhaojiazhai Coal Mine as an example,through the construction of"L-type"roof water drainage system,the overlying Neogene loose aquifer water was converted from roof water to floor water and discharged from underground roadway,which solved the problem of coal seam fully-mechanized mining under thin bedrock and thick loose aquifer,and realized the safe mining of working face.The successful application of this technology has promotion value for coal seam mining under similar hydrogeological conditions.