综采工作面末采期间切顶护巷技术研究

Technology of Cutting the Roof and Protecting the Alley during the Last Mining Period of the Comprehensive Mining Face

在13302综采工作面末采期间通过在回采巷道内布置切顶钻孔并进行深孔爆破,可有效降低13302综采工作面超前支撑压力影响范围,并降低采动给采区回风大巷围岩控制影响。现场应用后,采区回风大巷顶板、巷帮变形量控制在115 mm、47 mm以内,后续使用时巷道基本不需要修整。

During the final mining period of 13302 comprehensive mining face,by arranging roof-cutting drilling holes and deep-hole blasting in the roadway,it can effectively reduce the influence range of the over-supporting pressure of 13302 comprehensive mining face and reduce the influence of the mining movement on the peripheral rock control of the back-end roadway in the mining area.After the field application,the deformation of the roof plate and the roadway gang in the return-airway of the mining area is controlled within 115 mm and 47 mm,and the roadway basically does not need to be repaired in the subsequent use.