1. Xi’an Research Institute of China Coal Technology & Engineering Group Corp,Xi’an　 710054,China;2. Shaanxi Key Laboratory of Prevention and Con-trol Technology for Coal Mine Water Hazard,Xi’an　 710077,China

The quantitative degree of coal resources exploitation on water environment disturbance is insufficient in the coal mining area of western China. In this paper,it concludes that the spatial scale is the main factor to control the loss of groundwater by the method of groundwater dynamics analysis,which includes the caving zone,the fracture zone,the bending zone and the ground subsidence area. The method of numerical evaluation model of groundwater system is pro- posed,which is based on the boundary of the hydraulic conductivity of overlying rock,the partition of bending zone, and the re-subdivision of surface subsidence area. According to the quantitative evaluation of groundwater dynamic sys- tem disturbance in the Bulianta coal mine,the simulation results show that the loss of groundwater resources is about 1. 90×104 m3 / d due to the mining disturbance.

国家自然科学基金资助项目(41402220)；国家“十三五”重点研发计划资助项目(2016YFC0501102)；中煤科工西安研究院自筹基金资助项目(2014MS009)；

Zhao Chunhu,Hu Weiyue,Jin Dewu. Method of quantitative evaluation on amount of groundwater loss from unconfined aquifer caused by mining disturbance in the arid area of Western China[J]. Journal of China Coal Society,2017,42(1):169 -174.