Roadway surrounding rock control scheme via collaborative means of modification-bolting-pressure relief
In response to the problem of large deformation of roadway surrounding rock under deep high stress geological conditions in Yadian Coal Mine,taking the ZF1407 working face of Yadian Coal Mine as the engineering background,it is analyzed that the main factors causing large deformation of roadway surrounding rock are high stress,roadway excavation,and mining effects.A collaborative control plan for roadway surrounding rock modification,support,and pressure relief is proposed.The plan adopts the methods of shallow high-strength anchor cable support,deep fracturing pressure relief,and grouting reinforcement for fractured surrounding rock.Theoretical demonstration and on-site design practice are conducted.Through observation of the underground surrounding rock and mine pressure monitoring after the implementation of the plan,the results show that the deformation of the roadway decreases,the pressure on the working face is stable,and the stress situ-ations of the anchor rod and support have been significantly improved.The collaborative control scheme of roadway surround-ing rock modification,support,and pressure relief can effectively solve the support problem of roadway under complex and difficult conditions in the deep part of Yadian Coal Mine,thus ensuring the safety of roadway support.
synergy control of surrounding rockanchor supportgrouting modificationhydraulic fracturing pressure relief
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