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| Numerical simulation and treatment effect of gas drainage by large diameter directional high-level long boreholes |
| Che Wentao |
| Shanxi Huayang Group Xinneng Co., Ltd., No.2 Mine, Yangquan 045000, China |
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Abstract In order to solve the problem of gas overrun in the upper corner of 1031 working face of Shanxi Huayang Group Xinneng Co., Ltd. No.2 Mine, based on the coal seam overburden model of COMSOL, the negative pressure of extraction under different apertures is simulated and analyzed. The borehole with a diameter of 153 mm is selected, and the negative pressure of extraction is 20 kPa for field test. The results show that the average gas concentration in the upper corner after extraction is 0.48%, which is 0.66% lower than that in the early stage of extraction. It shows that the large-diameter directional high-level long borehole can help 1031 working face to deal with the problem of high gas concentration and reduce the potential safety hazards in the production process.
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| [ 1 ] 董太华，刘 娜，朱传杰，等. U型通风工作面采空区瓦斯运移规律研究[ J ]. 煤炭科技，2021，42（ 1 ）：1 - 4，9.
[ 2 ] 王万全. 采空区漏风对上隅角瓦斯积聚影响研究[ J ]. 山东煤炭科技，2020（ 9 ）：117 - 119，124.
[ 3 ] 徐俊峰. 综采工作面上隅角瓦斯治理研究与应用[ J ]. 煤炭科技，2020，41（ 3 ）：80 - 81，85.
[ 4 ] 吕晓来，杨宏民，范尚崇，等. 高抽巷联合高位钻孔治理上隅角瓦斯合理层位研究[ J ]. 煤炭技术，2021，40（ 4 ）：69 - 73. |
| [1] |
Cheng Lichao1,2,3, Lu Bin1, Li Xinwang1,2,3, Hao Yunde1, Long Hang1, Wang Haixuan1. Study on slurry diffusion law in goaf under different grouting pressure[J]. CCI, 2023, 46(9): 1-6. |
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