Research and Practice on the Control of Retaining Roadway Surrounding Rock in Small Coal Pillars Under the Influence of Mining
Aiming at the problem of serious deformation of retaining roadway surrounding rock in small coal pillars under the influence of mining,a roadway protection technology of"construction coal pillar passing through anchor cable+coal pillar grouting reinforcement+wood crib filling reinforcement+roof and floor cutting"is proposed,and verified through on-site mine pressure observation.The research shows that the use of blasting pre splitting and roof cutting pressure relief and floor blasting pressure relief can effectively reduce the roof pressure and floor heave amount of the 23upper04 auxiliary along second section roadway.The application of coal pillar passing through anchor cable and coal pillar grouting combined to reinforce the 23upper04 auxiliary along second section roadway and small coal pillars can effectively improve the stability of the roadway roof side surrounding rock and the bearing capacity of the small coal pillars.Wood crib filling reinforcement further reduces the deformation amount of the roadway surrounding rock under mining influence,achieving relatively good application effects.
small coal pillarretaining roadwaysurrounding rockcontrol
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