Study On Mining And Rock Control Technology In Rise Mining Full Mechanized Caving With Large Slope

Coal mine No.4 of Hong Hui in JingYuan Coal Industry Group Mine is an old mine, mining thick coal seam, coal quality,mine is currently the majority of remaining recoverable coal resources are in the 20°angle above, partly to reach 35°or so, and coal seam changes, geological structure and more, it is necessary to enlarge the great slope of longwall mining inclined to make part of the mining face the rise mining slope more than 30°, mining face rise mining slope much higher than is generally believed that the rise mining slope limit, a serious impact on the mine and the normal production of safe and efficient.This subject in the coal mine No.4 inclined thick coal seam longwall caving on the basis of field tested, the system analyzes its mining face great slope overhand mining the basic characteristics.Tilting on the large slope mining mining face rock caving system stability characteristics, and the great slope overhand mining coal caving face in the form of rib fall analysis, digital simulation analysis of a large slope rise mining mining face coal wall stress distribution and its impact on the role of fall roof, on this basis, the proposed inclined thick coal seam longwall mining face large slope overhand mining and the coal wall when the roof control measures, and conducted field trials and applications.Field engineering practice show that the coal wall and roof control measures to effectively improve the large slope topple mining face of the stent rock stability, field test technologies have achieved good economic results.