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| Study on mine pressure behavior and hydraulic fracturing roof cutting and unloading technology in fully mechanized mining face with large mining height |
| Li Yongjun1, Sun Liang2,3 |
1. Shanxi Mabao Mining Industry Corporation Ltd., Changzhi 046300, China； 2. Coal Science Group Shenyang
Research Institute Corporation Ltd., Fushun 113122, China； 3. State Key Laboratory of Coal Mine Safety Technology,
Fushun 113122, China |
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Abstract No. 15 coal face of Shanxi Mabao Coal Industry was taken as the research background, and based on the field working condition experiment, the layout scheme of hydraulic fracturing roof-cutting pressure relief hole was given. Combining FLAC3D software with RFPA2D-Flow software, the difference of main roof weighting during the initial recovery period of high recovery height before and after hydraulic fracturing roof cutting technology was demonstrated and analyzed. The comparative analysis showed that the hydraulic fracturing roof cutting technology could effectively shorten the first weighting step of the old roof, reduce the intensity of surrounding rock support labor intensity during the weighting period of the old roof, providing a reference basis for other similar mines.
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