大社矿综放工作面改造过渡液压支架提高回采率的应用研究

Application Research on Improving the Recovery Ratio by Transforming the Transition Hydraulic Support of Fully Mechanized Caving Face in Dashe Mine

基于综放工作面两巷摸顶掘进的模式,工作面上端头及运料巷底部丢三角煤的情况,大社矿采用了改造工作面机尾过渡支架,提高过渡液压支架支护高度的方法,加大机尾的采高,结果表明:不仅能采出机尾的三角煤,连带运料巷的底煤也能全部采出,显著提高了综放工作面的回采率。

Based on the mode of two-lane top-coal caving in the fully mechanized caving face,the situation of dropping triangle coal at the top end of the face and the bottom of the conveying roadway,Dashe mine adopts the method of transforming the tail transition support of the work face,raising the support height of transition hydraulic support,and raising the mining height of tail.The results show that not only the triangulated coal at the end of the machine can be extracted,but also the bottom coal in the transportation roadway can be completely mined,which can obviously improve the recovery rate of the fully mechanized caving face.