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| Study on surrounding rock deformation of hard roof cutting and roadway retaining by filling in Tenghui Mine |
| Yang Peng |
| Tenghui Coal Industry Co., Ltd, Huozhou Coal Electricity Group, Linfen 041000, China |
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Abstract In order to solve the problem of the great influence on surrounding rock deformation by the hard roof, and taking No. 2202 Face of Tenghui Mine as the engineering background, the stress and strain of roof cutting and pressure relief filling body were studied using the numerical simulation software. The feasibility of roof cutting and pressure relief was verified by comparing the stress values of filling body before and after roof cutting. The stress and strain of surrounding rock under different roof cutting angles and different roof cutting and pressure relief heights were analyzed, and the optimum cutting angle was 30 °， the optimum height of top cutting was 10m. It provided a certain reference for roof cutting and pressure relief.
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