Water Supply and Regulation of Underground Reservoir in Coal Mine considering Coal-Water Occurrence Relationship

Abstract

Water supply prediction and control is one of the key issues in exploitation of coal mine underground reservoirs (CMUR). In order to investigate the water supply for underground reservoirs in coal mines, the aquifers were classified into three types (types I, II, and III) according to the relative location of aquifers. The discrete element fluid structure coupling numerical simulation model is constructed according to the classification results. The numerical simulation parameters are inversed based on the surface subsidence data and the advance support pressure, and then, the disturbed characteristics and water pressure variation law of different types of aquifers are studied. The research results show that the maximum water inflow of type III, type II, and type I aquifers is 739 m3/h, 377 m3/h, and 279 m3/h, respectively. The dynamic calculation process of underground reservoir capacity under mining disturbance is refined, and the regulation and storage methods of underground reservoir are preliminarily put forward.

Research on the Capacity of Underground Reservoirs in Coal Mines to Protect the Groundwater Resources: A Case of Zhangshuanglou Coal Mine in Xuzhou, China

“…Kong et al [7] used theoretical analysis and similar simulation experiments to optimize the trench depth of the underground reservoir in the Wulanmulun coal mine. Wang et al [41,42] conducted an experimental study on the deformation characteristics of rock and coal bodies under stress-fluid interaction in underground reservoirs of coal mines. González et al and Menéndez et al [43,44] explore the viability of a network of tunnels in NW Spain as an underground water reservoir.…”

Spatial and Temporal Distribution of Groundwater in Open-Pit Coal Mining: A Case Study from Baorixile Coal Mine, Hailaer Basin, China

“…In the field of groundwater monitoring in open-pit coal mining areas, through long-term monitoring and analysis of the mining area in Riyadh, Saudi Arabia, Yihdego and Drury [15] found that open-pit mining activities in arid areas resulted in a significant drop in groundwater level. Existing articles on groundwater dynamic observation and data analysis mainly focus on urban groundwater source areas [11,12,[25][26][27][28] and underground coal mining area [29][30][31][32][33][34][35][36], there are few articles about the spatial and temporal distribution charac-teristics of groundwater, disturbance range, and factors under the condition of high-intensity mining in open-pit coal mines, and the distribution of the diving ecological groundwater level needs to be further studied.…”