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| Study on key parameters of gob-side entry retaining with roof cutting and pressure relief in Zhuangzihe Coal Industry |
| Li Qing |
| Zhuangzihe Coal Industry, Shanxi Jiaomeishanmei International , Changzhi 047100, China |
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Abstract In order to improve the recovery rate of coal resources in Zhuangzihe Coal Industry, it is decided to implement the roof cutting and pressure relief self roadway technology in 15106 working face. Through theoretical analysis and numerical simulation, it is determined that the reasonable roof cutting height is 9 m and the roof cutting angle is 15°. According to the roof cutting parameters and the actual engineering geological conditions of the working face, the reinforcement support scheme of the retained roadway section is proposed. The field application results show that after the implementation of roof cutting and pressure relief technology, the overall stability of the surrounding rock in the retained roadway section is good, which can meet the normal production requirements of the working face.
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