Research on Advanced Support Technology for the Working Face Machine Roadway of Renlou Coal Mine
In order to solve the problems of the roof being extremely fragile and swollen,and the surrounding rock being broken in the Ⅱ8224N working face machine roadway of Renlou Coal Mine,the development law of the loose zone of the surrounding rock in the working face roadway is obtained by using the method of drilling and peeping.The anchor cable type advanced support technology scheme for the working face(grouting)is designed,and a mechanical model of the surrounding rock support structure is established to calculate the surrounding rock support force.Industrial experiments are used to verify the advanced support technology scheme on site.The research results indicate that the integrity of the roof of the machine roadway is good,with transverse cracks mainly developed in the shallow part of the roof,which are relatively small and there is no obvious fracture zone development,and no obvious separation phenomenon;Tiny longitudinal micro thin cracks are sporadically developed in the deep part of the roof,with shorter crack lengths.The mechanical model of stable support of surrounding rock with active type advance support is established,and a phased advanced support technology scheme is proposed combined with the original anchor rod(cable)support technology scheme of the working face machine roadway.Industrial tests are conducted in the working face machine roadway to verify the good support performance of active type advanced support anchor cable and the good control effect of surrounding rock stability.The research results can provide certain reference significance for similar working face mining roadways in other mines.
working facemining roadwayadvanced supportgrouting anchor cable
万方数据
维普
