Abstract
The analysis found that the coal mining process in the western mining area has the mining loss and disaster effect of the water-rich aquifer of the coal seam roof, which is mainly manifested by the overburden water in the roof. On this basis, the formation and development of the separation water of the roof is proposed, and the mechanism of the water inrush from the layer is revealed. It is found that there is hydrostatic pressure and hydrodynamic pressure in the separated water, under the combined action of bed separation water pressure, the mining-induced fracture and water-isolation layer tension fracture are connected, which causes water inrushing in the coal working face of the mine, and provides a theoretical guarantee for the large-scale development of coal resources in western mining areas.
Highlights
In the area, the water-bearing and water-repellent layers in the mine field can be divided into five aquifers and three aquifers according to their water content, water type and hydraulic characteristics
The analysis found that the coal mining process in the western mining area has the mining loss and disaster effect of the water-rich aquifer of the coal seam roof, which is mainly manifested by the overburden water in the roof
It is found that there is hydrostatic pressure and hydrodynamic pressure in the separated water, under the combined action of bed separation water pressure, the mining-induced fracture and water-isolation layer tension fracture are connected, which causes water inrushing in the coal working face of the mine, and provides a theoretical guarantee for the large-scale development of coal resources in western mining areas
Summary
Ningzheng mining area is located in the southeast of Qingyang city, Gansu province. The mining area is located in the southwestern margin of the Ordos basin. The administrative division is under the jurisdiction of Zhengning county and Ning county in Qingyang city, and is connected to the Binchang coalfield and the Xunyi coalfield in Shaanxi.
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