Study on mine pressure characteristics and force-structure cooperative prevention and control on mining roadway with deep thick hard roof

Taking typical rock burst mines in Northwest China as engineering background, study on the effectiveness of force-structure cooperative prevention and control，research of the analysis of rock burst behavior characteristics and main control factors of repeated mining roadway under the condition of deep typical thick and hard roof.Based on the analysis of rock burst behavior characteristics and main control factors of repeated mining roadway under the typical thick and hard roof in northwestern region, the combination of“point-surface-area”was used to analyze the stress distribution of mining roadway in deep thick hard roof, and it was determined that the main reason for the serious rock burst in the return airway was the fracture of the lateral overlying rock structure of the section coal pillar and the superposition of mining induced stress. It is proposed that rock burst prevention and control should start from both the structure and stress environment of the surrounding rock of the mining roadway, by adjusting mining roadway surrounding rock stress environment, artificially interfering high-low rock strata breaking states to increase the elastic energy released by the fracture of the high and low thick and hard roof. According to the change of the broken rock zone under the primary and secondary mining, the support parameters of roadway surrounding rock were optimized, the instantaneous energy absorption and pressure yielding capacity of roadway rigid support system near the peak of working face advanced stress was improved, and according to the existence conditions of the stope coal seam and structure characteristics of surrounding rock and the characteristics of stress environment changing, on the basis of the structure optimization and the applicable conditions of stress control measures, the space-time combination of various measures can be adjusted dynamically to realize the stability control of surrounding rock in mining induced roadway. Based on the field practice of typical rock burst working face, the effectiveness of force-structure cooperative prevention and control technology in mining induced roadway was verified, which provides theoretical guidance for the prevention and control of rock burst in mining induced roadway under the condition of deep thick and hard roof in the northwestern region.