It is difficult to maintain the roadway around a fault because of the fractured surroundings,complex stress environment,and large and intense deformation in the
Hardgrove grindability index (HGI) is an important indicator of coal grindability, and is one of the most important parameters to determine the capacity of coal
Water-inrush in mine is one of the mine disasters caused by mining.In order to assess the risk of roof water-inrush in Wuyang Coal Mine based on the geological