Study On The Coupling Support For 28 Transformer Substation Under Dynamic Stress

The steady control of softrock roadway, especially the control under dynamic pressure softrock roadway is always one of the most difficult problems in mining project. The reassigned of stress caused by mining is not only centralized in the coal pillar arounding the mining area, but also transported to the frontage roadways and caused the roadways serious distortion. In relation to the mining geological condition of Micun 28 transformer substation, with theoretical analysis, practical observation and numerical simulation, the main equations of stability of roadways under 28031 working face influenced was analyzed in this thesis. Furthermore, it provided the coupling structure support. Aimed at some key questions of the coupling support structure, the thesis investigated the interaction of support and rock, the failure and instability analysis of roadways; Study on spread principal of grout, the relation of grouting diffusion radius with different grouting pressure, different water cement ratio and different grouting sequence, furthermore, the grouting pressure attenuation rule is analyzed; It has proposed the technical measure of coupling support structure has been proposed, analyzed the impact of the position and arranged the cable joist to structural amendment of support bearing. Based on above analysis, combination with the mining geological condition of 28 transformer substation, the coupling support has been successfully used in engineering and practice. The research achievements of this thesis will provide the important technique reference to support of roadway influenced by the dynamic pressure. With the excellent social and economic benefit, it has great guide significance not only for the experiment roadway, but as to other roadway support under the dynamic pressure influenced.There are 40 figures, 9 tables and 57 references in this thesis.