Research on the Perimeter Rock Support Technology of Double Retraction Channel during the Final Mining Period of Comprehensive Mining Face
Taking the support of 3602 retraction channel as the research object,combined with the site conditions and the changes of the roadway surrounding rock force environment,it is proposed to use the anchor net cable high strength support+high water filling column supplementary support to support the surrounding rock,and use the long anchor cable for the top plate during the retraction channel excavation,and use the middle and long anchor cable for the roadway gang to carry out the high support,and give full play to the advantages of the high water filling column with high compression strength and large scope of the roof support to reduce the dynamic pressure and reduce the dynamic pressure.During the final mining period,it gives full play to the advantages of high compressive strength of high water-filled columns and large range of roof support to reduce the impact of dynamic pressure.After the application on site,the surrounding rock of 3602 comprehensive mining face's pre-excavation retreat channel during the final mining period always remains stable,and the section of the retreat channel can meet the needs of the retreat of mining face equipment.
coal miningmining dynamic pressureretreat channelperimeter rock supporthigh water filling pillar
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