Research On Surrounding Rock Control Techiques Of Mining Roadways Of Coal Seam 15 In Sihe No.2 Coalmine

In view of the serious problems exsisting in surrounding rock control techniques of mining roadways in Jincheng Mining Group,such as large amount of deformation in partial area,through combined methods of borehole study,experimental test,field observation,theoretical analysis, numerical simulation the thesis made a comprehensive analysis of the mining pressure behaviors of coal seam 15 in Sihe No.2 coalmine, which provides the basis for optimization of roadway supporting scheme and choosing reasonable size of coal pillar, the main research results include the following aspects:a) Through combined methods of field observation, theoretical analysis, the thesis made a comprehensive analysis of the mine pressure behaviors of the mining roadway of coal seam 15 in Sihe No.2 coalmine, and grasped the deformation characteristics and laws of mining roadway.b) Study on the boreholes reveals the roof strata structure of coal seam 15 in Sihe No.2 coalmine, and determines physical mechanics parameters of coal seam 15 and roof-floor rock in Sihe No.2 coalmine. c) Maked evaluation to the original supporting scheme of the mining roadway of coal seam 15 in Sihe No.2 coalmine according to field observation, and optimized the original supporting scheme through numerical simulation method.d) Through combined methods of theoretical calculation and numerical simulation the thesis determined the reasonable size of coal pillar of the mining roadway of coal seam 15 in Sihe No.2 coalmine.The part of results have been applied into the production in Sihe No.2 coalmie and bring about safty production with high efficiency, which provide valuable experience for coal seam 15 mining in Jincheng Mining Group, have conducted helpful exploration about the mine pressure behavior and surrounding rock control technology of the mining roadway and have significant theoretical value and practical meaning.