巴拉素主立井井筒水文地质条件分析

Analysis of hydrogeological conditions of the main vertical shaft in Balasu Mine

为了给主立井井筒的设计和施工提供可靠的地质依据,需要查明井筒场地所在区域水文地质条件。通过对巴拉素煤矿主立井的地质勘查,得到井筒穿越含水层和隔水层的水文地质特征及各含水层段的水文地质参数,根据地下水的赋存条件、水力特征及含水层的纵向分布结构,将井筒场地含水层由上至下划分为5层;分析了隔水层的分布情况;总结出地下水的补给、径流、排泄条件、井筒充水因素充水途径及方式。研究发现,主立井井口砂层含水层厚度较小,但砂层含水层受季节性降雨影响较大,井筒实际施工时遇到大的导水构造时,会形成充水通道,施工中应采取必要的防堵措施,从而确保施工安全。

In order to provide reliable geological basis for the design and construction of main shaft,it is necessary to ascertain the hydrogeological conditions in the area where the shaft site is located.Through the geological exploration of the main shaft in Balasu coal mine,the hydrogeological characteristics of the aquifer and the aquifuge and the hydrogeological parameters of each aquifer were obtained.According to the occurrence conditions and hydraulic characteristics of groundwater,the aquifers in shaft site were divided into five layers from top to bottom,and the recharge,runoff and discharge conditions of groundwater as well as the factors and ways of filling water were summarized.The study found that the thickness of sand aquifer is small,but it is affected by seasonal rainfall.When large water-flowing structures are encountered in shaft construction,water filling passages will be formed.Therefore,necessary prevention measures should be taken to ensure construction safety.