Study Of Top-Coal Broken And Drawing Speed Of Working Face

With "stope at overlying rock stratum movement to centre " ore pigeonhole theory, the coal working range destroys this centre point of time around working face, use elastic mechanics , basic principle of rock mechanics, have analysed that covers the rock stratum structure on the working range , on this basis , set up working range is it press mechanics model and floor before and after in load the mechanics structure under function equivalently to come for the first time separately, is it appear stope cover rock discrimination terms , key stratum to lead, rock roof beam load, floor of shape and with carry coal destroy time interval corresponding working range theory advance speed ,etc. to analyze and solve, and has carried on theory analysis and number value to calculate through the instance . The result indicates , the theory advances the speed to reflect basically the working range adopts and puts the circulation variation tendency, have put forward and advanced the circulation homework way corresponding in speed with the theory. In a word, this theory achievement can be used in instructing and is the coal is exploited and the circulation homework way is designed to blast down the roof.