In order to prevent accidents such as roof crushing and collapsing from occurring during the passage of 3110 backwind tunnel in Qianhe Coal Mine and to accelerate the speed of the passage,the technical difficulties existing during the passage are reasonably analyzed,and the joint support of"anchor mesh rope+steel shed"is adopted before the passage,and the temporary support of"overpassing through the brazier"is adopted during the passage,while"steel shed+wooden pillar"is adopted after the passage.In addition,it adopts the joint support of"steel scaffolding+wooden column+anchor rods(ropes)"for the roadway before passing through the empty lane,and adopts the temporary support of over-penetrating brazing during passing through the empty lane.Through the actual application effect,after taking the joint support technology,it improves the stability of the roof plate during the passage,and there is no accident of the roof plate collapsing in the passage,and the digging speed of the passage is increased to 5.4 m/d,which achieves remarkable application results.
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