Research on deep-hole blasting cutting top and relief along-the-pillar leaving support technology
The technique of leaving an empty passage along the coal seam is one of the important ways to mine without coal pillars,which can improve coal recovery rate and eliminate stress concentration or dynamic disasters caused by the remaining coal pillars.In order to alleviate the tense situation of mining and production succession and improve the recovery rate of coal resources,this study takes the Shanxi Yiqing Mine Ⅱ 13102 along-coal-seam roadway as the engineering background and determines the main parameters of deep-hole blasting cut-top unloading along-coal-seam roadway cutting angle,height and drilling interval by theoretical analysis.At the same time,it puts forward the rock control scheme for the adjacent roadway,and conducts on-site industrial tests to effectively control the de-formation and destruction of roadway rock mass.
万方数据
维普
