The stress analysis of surrounding rock for two random geometry tunnels is studied inthis paper by using Schwarz's alternating method. The simple and effect
The main contests of mine optimization design includes: mine field size, horizon and level height, number, shaft form and development disposal and so on. In thi
This article proposes a water inrush mechanism of progressive intrusion of pressurewater up into the coal floor aquiclude according to injection tests and obser
The double drum drive is widely used on the mine belt conveyor, which are divided the rigid connected double drums and separately driving double drums according