Technology for fully-mechanized Mining Face Passing Through Deserted Roadways Rapidly
Based on the engineering background of 5302 fully-mechanized mining face of A Mine in Shanxi passing through deserted roadways,in order to realize the safe and efficient mining of the mining face,according to the distribution location of the deserted roadways,support mode,surrounding rock lithology,strata behaviors of mining face,etc.,the strengthening measures and safety measures for the deserted roadways were put forward.The results of engineering application show that the stability of deserted roadway surrounding rock can be significantly improved by using anchor cable +W steel belt + frame reinforcement support of roof,FRP anchor reinforcement support of roadway wall,and grouting reinforcement in local broken surrounding rock.Slope adjustment and waiting for pressure of fully-mechanized mining face can reduce the range of once exposing deserted roadways,ensure that the deserted roadways in the full negative pressure ventilation scope,and avoid the problem of old roof period pressure during the exposing of deserted roadways;the floor penetration method was used to expose deserted roadways,and avoid shearer cutting metal materials such as bolt,anchor cable and W steel belt of deserted roadway,which will cause roof instability.After engineering application,the advancing speed of mining face can be maintained at 4.8 m/d during the period of passing through deserted roadways,and there were no problems such as abnormal mine pressure and large deformation of surrounding rock of deserted roadways,which indicates that the technology adopted on site has remarkable effect.
fully-mechanized mining facedeserted roadwaysurrounding rock supportmine pressure
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