Based on the fact that during the period when 15203 working face of Shengtai Coal Mine passes through X4 fallen pillar,the collapsed coal pillar is serious,which leads to slow advancing speed of the working face,high resistance of the bracket in the area of fallen pillar,and the phenomenon of the bracket being stuck to the bottom,Shengtai Coal Mine adopts the joint support technology of"laying flexible fibre net+roof beam shelf roof+hydraulic expansion anchor"for the roof and surrounding rock in the area of fallen pillar through technical research,which can be seen through the actual application effect."Through the actual application effect,the top plate crushing phenomenon in the fallen pillar area is effectively controlled after adopting the joint support technology,and significant application results have been achieved.
integrated mining working facetrapped columnbroken roof platesupport technology
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