Environmental Effect Of Surface Mining On Ground Water

The development and utilization of coal resources for the sustained and stable development of the national economy has made a significant contribution, but in the mining process, so close with the overlying aquifer gradually affected even destroyed, mainly for mining work with constantly goes forward surface, overburden goaf appear sequentially due to loss of support falling, collapse and fracture cracks, making the aquifer water down through these cracks continue to leak, eventually resulting in the overlying water reducing groundwater reserves and homeostasis and ecological destruction.In this paper, Xilin Gol League in Inner Mongolia Autonomous Region Xiwuzhumuqin flag an open coal mine area as the main research object, through detailed analysis of groundwater aquifer before groundwater flow characteristics of hydrogeological conditions, mine Opencast mining process for groundwater Draining the environment caused by changes in groundwater were studied.Based on analysis of the terms of boundary conditions and hydrogeological conditions, the use of groundwater numerical simulation methods, the establishment of a three-dimensional groundwater flow unsteady flow mathematical model basically realistic, and solve the model identification and verification using proven numerical model of groundwater flow field and simulated exploration prospect evaluation, demonstration groundwater mining conditions and the level of assurance, predict trends during the exploitation of groundwater resources, mainly the following conclusions:1) Because of the larger mining groundwater Draining may cause a large area of unconfined aquifer is sparse dry, water pressure dropped significantly; with the change of position of mining, landing funnel center also change accordingly. Stop mining in regional groundwater will naturally recover.2) When the eastern mining region 1 mining area, basically did not affect Bayan Hua hematoxylin shallow water; when mining region in western China Bayan hematoxylin phreatic will be some impact, the water level dropped about 1m.3) In the wet season, May sparse about 11,000 cubic meters of water; in the dry season, May sparse about 07,000 cubic meters of water.4) With the continued dry sparse groundwater, it will completely change the characteristics of the confined water flow system in the area.5) River diversions and groundwater drawdown funnel regional vegetation growth will be affected to some extent, especially along the former Yan Jiga river and swamp vegetation.