365体育投注

城郊矿综采工干面回撤畅通道剩设即兴实与讨论

  Due to the influence of various geological conditions,although has stopped working,all kinds of pres-sure behavior have stabilized,but abnormal gas emission phenomenon still appear in the process of fully mechanized equipment dismantling,will bring safety hidden trouble to retreat work.Combines the actual situation of Chengjiao coal mine 2505 fully mechanized coal mining face,by changing the conventional retreat process and establishing re-treat channel,realized full wind pressure ventilation in retreat working face.During the construction,the content of gas was effectively controlled,ensures construction safety and realizes normal replacement of working face.

Copyright © 2014-2016 365体育在线手机版投注 版权所有