BOLT-MESH SUPPORT TECHNIQUE FOR LARGE SECTIONAL TUNNEL UNDER MINED GOB WITH THIN TOP-COAL
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Abstract
By using numerical simulation of UDEC2D and FLAC3D,the bolt-mesh support to large sectional tunnel is designed and its feasibility is analyzed with respect to different thicknesses of top coal,under the conditions of thin top-coal,low stress and fractured coal seam beneath the mined gob.
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