Limestone Hydrogeological Condition And Groundwater Dynamic Characteristics In Panxie Mining District

Huainan coalfield is located in the south rim in the north of China which geological conditions is complex, and mines are always threatened by various water-inrush disasters during mining. With the increase of mined depth, the probability of water-inrush from floor limestone also increases. Studying on hydrogeological condition and groundwater dynamic characteristics systematically is to provide the basis for preventing and controlling the desaster,which has an important meaning for mining safety.This paper based on consulting related literatures, collation and analysis detailed information on Panxie coal district, analyse stratigraphic characteristics of limestone,morphological characteristics of geological anomalous body;hydrogeological condition and aquifer structure of limestone,also,include water quality and recharge,runoff,discharge conditions of limestone aquifer,hydraulic connection between different limestone formation. Using pumping water test data,analysis water enrichment rules, influence factors and characteristics of water enrichment features.In order to further ascertain the mining Hydrogeological condition of limestone formation, analyse water dynamic characteristics of limestone inespecially dynamic change of water level,water quality and water temperature in Zhangxie mining and Panji mining area.at the same time,analyse the influence factors of limestone water dynamic characteristics, at last,we conclude thatrecharge conditions of boundary in Panxie Mining district is poor, internal anticline fracture channel and fault structure is developed,groundwater runoff conditions are good and supply is less man excretion and consume internal storage;geological structure is one factor of dynamic change of water, however the external inducing factor is drainage.