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| Study on support technology of roadway near goaf in layered under close distance |
| Han Zhengmin |
| Shanxi Jinshen Energy Co., Ltd., Xinzhou 036500, China |
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Abstract Under the influence of stress superposition and secondary disturbance of roadway excavation, the roadway near the goaf in the lower layer was affected by the stress concentration in the tunneling range, the surrounding rock was broken and the deformation was large, and thesupport was difficult. Based on the analysis of the deformation mechanism of surrounding rock of No.11102 transport roadway in Ciyaogou Mine, the grouting reinforcement, shed support + anchor cable, and shed reinforcement support schemes were formulated. The field application and mine pressure observation results showed that after the reinforcement support scheme was adopted, the maximum displacement of roof and floor was 100 mm, the maximum displacement of two sides was 140 mm, and the section shrinkage rate was only 5.6 %. The deformation of roadway surrounding rock was effectively controlled, and the support strength met the support requirements of the roadway, which provided reference for the roadway support scheme under similar conditions.
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