Design of Large Section Roadway Driving Support Technology in Coal Mine
In order to solve the problems such as low construction efficiency,poor roadway forming quality and diffi-cult support,etc.restricted by construction conditions and technical level in the process of excavation of large section coal roadway,taking the 22003 upper channel driving face of Chensilou Coal Mine as the engineering background,the bending deformation of roadway roof and rock strata is analyzed.It is concluded that the larger the roadway width,the greater the deformation,the more likely the roof is to deform,and the more likely it is to collapse.Based on this,it is determined to adopt the combined support technology of anchor net spraying and anchor net belt.Practice has proved that after adopting the combined support technology,the strength of surrounding rock is greatly improved,the subsidence of roadway roof is controlled below 9 mm,and the convergence of two sides is controlled below 5 mm,and the deformation of surrounding rock is better controlled.
Large sectionCoal roadwaySurrounding rockCombined support
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