Study the impact of 9310 working face mining on −670 water sump


In order to research on the impact of water sump under seam floor. by mining 93upper10 working face in Nantun Coal Mine, numerical simulation and theory study are carried out in this paper. In the theoretical study, from the failure pattern of coal floor, criterion is put forward, that is whether the water sump is affected or not is existed in the overlap… (More)


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