Research on Anti-sheet Wall and Anchoring Performance Improvement Technology of Soft Crushed Coal Rock Along Channel
In order to solve the problems of serious slope of soft broken coal roadway and poor grouting effect of traditional sealing process,taking the 9-2071 belt fluting support in Dianping Coal Mine as the engineering background,the research on fluting fluting grouting sealing process technology of soft broken coal rock is carried out through field investigation,simulation calculation and industrial practice.The research shows that:the 9# coal seam has low strength,loose breakage and serious caving,and the traditional grouting process has poor hole sealing effect of cotton yam.A new mechanical grouting hole sealing device is designed to strengthen it,and the sealing rubber sleeve is determined to be 4 cm in length and 4 mm in thickness.After application,the grouting pressure can be more than doubled compared with the traditional sealing process,and the anchoring force of the side bolt can be nearly doubled.It can be popularized and applied in this mine.
coal roadwaygrouting reinforcementnumerical simulationanchorage force
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