焦作矿区地下水位动态变化特征研究

Study on the Characteristics of Groundwater Dynamic Changes in Jiaozuo Mining Area

通过研究大气降雨对地下水位的影响,确定了大气降雨是焦作矿区地下水的主要补给源,表现为丰水期短期强补给,枯水期缓慢排泄消耗的模式,补给区年降雨量与地下水位年变幅呈正相关关系。根据奥陶系(O2)灰岩水位年变幅及回升时间差的差异性,确定了朱村断层带和凤凰岭断层带是矿区O2灰岩岩溶水强径流带。根据石炭系灰岩含水层(L8)水位年变幅及回升时间差的差异性,确定了朱村断层带、凤凰岭断层带和九里山矿西部煤层露头底砾岩发育区域及马坊泉断层带西段区域是L8灰岩接受O2灰岩岩溶水的强补给区。

Based on the study of the effect of atmospheric rainfall on groundwater level, it is determined that the atmospheric rainfall is the main recharge source of the groundwater in Jiaozuo Mining area. It is shown that the short-term strongly recharge source in flood period and the slowly drainage wasting mode in low water period, and the annual rainfall shows a positive correlation with the annual variation amplitude of the groundwater level in recharge area. According to the annual variation amplitude of the groundwater level in the O2 limestone and the difference of recovery time, it is determined that the Zhucun fault zone and the Fenghuangling fault zone are the strong seepage flow zone of the O2 limestone karst water in the L8 mining area. According to the annual variation amplitude of the groundwater level in the L8 limestone and the difference of recovery time, it is determined that the Zhucun fault zone, the Fenghuangling fault zone, the conglomerate develop area at the bottom of the coal seam outcrop in the west region of Jiulishan coal mine and the west region of Mafangquan fault zone are the strong recharge area where the L8 limestone receives the replenishment from the O2 limestone karst water.