Study On Gob-side Entry Retaining For Gently Inclined Thin Seam In Da Anshan Mine

The technology of gob side entry retaining has the advantages of saving resources and preventing mine power disasters, it is consistent with the requirements of green and technical mining, however, the complexity of geological conditions and different conditions of production and technical restrict the promotion and application.According to the question of deep gob-side entry retaining for gently inclined thin seam in Da'an'shan mine, the mine tests have been conducted and the stress distribution law of the land has been determine with using theoretical analysis, scientific experiment and numerical simulation methods. The physical and mechanical parameters of minable coal seams of coal and rock have been tested, the basic parameters of coal rock have been get. The characteristics of roadway surrounding rock stress, the pressure rule of working surface rock and the effect of gob side entry retaining have been simulated. The gob of side entry retaining, the parameters of support inside roadway and the roadside support scheme of intense stage cut root layout have been determined. The feasibility of scheme has been verified by industrial field experiments.Thesis research results in the successful application of Da'an'shan mine. The Dynamic disaster risk of deep exploitation has been resolved; the problem of dig interconnection tension has been relieved; it has significant economic and important social benefits.