Deformation and Failure Mechanism and Surrounding Rock Control Technology of Deep Mining Roadways
In order to solve the problems of deformation,damage,and maintenance difficulties in the deep mining roadway of Zhaozhuang Coal Mine,the deformation characteristics and failure mechanism of 13113 roadway were analyzed.The main reasons for deformation and damage were the combined effects of multiple factors such as increased ground stress in the 1311 working face,multiple strong dynamic pressures,and poor overall support between bolts(cables).The support technology of"deep and shallow hole grouting+anchor cable reinforcement"was adopted on site.The on-site mine pressure monitoring data showed that after reinforcement,the maximum displacement of the two sides of 13113 working face was 65 mm,the maximum subsidence of the roof was 38 mm,and the maximum displacement of the floor was 18 mm;the deformation of the surrounding rock of the roadway was significantly reduced compared to before reinforcement,fully indicating that the coupling support of deep and shallow hole grouting and anchor cable reinforcement effectively controlled the deformation of the surrounding rock of the roadway.
deep mining roadwayfailure mechanismdeformation of surrounding rocksupport technology
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