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| Application of bolt-grouting integration technology in permanent coal roadway support of Luhe Mine |
| Wang Qiang |
| Luhe Coal Industry Co., Ltd. of Shanxi Lanhua Group, Jincheng 048114, China |
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Abstract The ventilation connecting roadway of auxiliary inclined shaft in Luhe Mine is arranged in No.3 coal seam. In order to reduce the maintenance of roadway, the bolt-grouting integrated support technology was adopted. In order to reasonably determine the support parameters, the acoustic emission method was used to study the failure depth of the loose circle in No.3 coal seam. The results showed that the maximum depth of the loose circle of the roadway roof was 2.4 m, and the maximum depth of the two sides was 2.3 m, so the length of the bolt was determined to be 2.4 m. On the basis of analyzing the mechanism of bolt-grouting support, the specific support scheme and grouting process were determined. The field application showed that the bolt-grouting integrated support technology had stable deformation, short duration and small deformation, which provided reference for the support of top coal broken coal roadway.
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