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| Practice of support optimization technology for gob-side entry driving in 10605 working face of Malan Mine |
| Sun Xiaobo |
| Malan Mine, Xishan Coal and Electricity Co., Ltd., Taiyuan 030205, China |
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Abstract In order to realize the safe mining of 10605 island working face in Malan Mine, the gob-side entry driving technology of island working face was studied. The observation of lateral abutment pressure at 10606 working face shows that the maximum stress concentration of the working face is located at the drilling depth of 4～6 m. When the drilling depth is 8 m, the stress concentration gradually decreases and gradually returns to the original rock stress state. Combined with theoretical calculation and numerical simulation analysis, it is determined that the width of coal pillar in the transport roadway of 10605 working face is 8.0 m. The supporting scheme is designed and preliminarily verified by FLAC 3D software. The field application shows that after the optimization scheme is adopted, the shrinkage rate of roadway section is small, the deep rock stratum is stable, and there is no separation, and good supporting effect is achieved.
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