Abstract:Karst water in Ordovician limestone has been seriously polluted in Hongshan and Zhaili coal mine areas in Zibo city. The water pollution occurred suddenly after the mining entirely ended. The pollution scope is generally equivalent to the store-up water area distributed in the old pits, and the pollution compositions in the Ordovician limestone underground water similar to the high content compositions in the store-up water. According to monitoring information, it showed that the water level of store-up wat...