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| Study on key technology of roof cutting and pressure relief roadway protection of No.1102 transportation roadway of Huacaotan Mine |
| Li Qinsheng |
| Zhangye Hongneng Coal Industry Co., Ltd., Zhangye 734199, China |
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Abstract The mining influence of several working faces in Huacaotan Mine has caused the roof of the roadway in the adjacent mining area to sink and the side wall to flake. For the drilling pre-splitting blasting of the roof in No.1102 transportation roadway, the influence of the mining of the working face on the roadway of the inclined shaft was reduced by cutting the roof and relieving the pressure, which reduced the frequency of roadway maintenance and realized the purpose of roadway pressure relief and protection. In order to achieve the best pressure relief effect, the theoretical analysis and FLAC3 D numerical simulation technology were used to simulate the stress variation law of the surrounding rock under different blasting angles and blasting heights. By optimizing the simulation scheme, the advanced stress distribution law of the stope and the deformation trend of the roadway under different roof cutting schemes were analyzed, and the optimal parameters of roof cutting and pressure relief in the 1102 transportation gateway of Huacaotan Mine were determined.
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