| 水力割缝参数优化数值模拟研究 |
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| 引用本文： | 李 兴,李树清,' target='_blank'>,汤 铸,杜少华,' target='_blank'>.水力割缝参数优化数值模拟研究[J].中州煤炭,2019,0(5):18-23. |
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| 作者姓名： | 李 兴 李树清 ' target='_blank'> 汤 铸 杜少华 ' target='_blank'> |
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| 作者单位： | （1.百色百矿集团公司，广西 百色 533000； 2.湖南科技大学 南方煤矿瓦斯与顶板灾害预防控制安全生产重点实验室，湖南 湘潭 411201；3.湖南科技大学 资源环境与安全工程学院，湖南 湘潭 411201； 4.中南大学 资源与安全工程学院，湖南 长沙 410083） |
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| 摘 要： | 利用FLAC3D软件建立水力割缝模型，针对某掘进工作面，选取其正前方12 m处截面为研究对象，在缝槽高度和深度不变的情况下，模拟了单缝槽、双缝槽和多缝槽3种不同宽度缝槽的割缝方案，得到了瓦斯抽采钻孔割缝前后煤体内部应力变化和竖直位移变化、垂直于割缝钻孔上方煤体的下沉量及塑性区破坏情况。结果表明:当缝槽宽度为2 000 mm时，割缝钻孔的卸压效果明显，煤体下沉量较大，钻孔周围塑性区破坏较大，钻孔的稳定性最好。
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| 关 键 词： | 水力割缝 参数优化 瓦斯抽采 钻孔卸压 |
Research on numerical simulation of parameters optimization of hydraulic cutting seam |
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| Li Xing,Li Shuqing,' target='_blank'>,Tang Zhu,Du Shaohua,' target='_blank'>. Research on numerical simulation of parameters optimization of hydraulic cutting seam[J].Zhongzhou Coal,2019,0(5):18-23. |
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| Authors: | Li Xing Li Shuqing ' target='_blank'> Tang Zhu Du Shaohua ' target='_blank'> |
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| Affiliation: | （1.Baise Mining Group Co.，Ltd.，Baise 533000，China； 2.Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Coal Mines，Hunan University of Science and Technology，Xiangtan 411201，China； 3.School of Resource Environment and Safety Engineering，Hunan University of Science and Technology，Xiangtan 411201，China；4.School of Resources and Safety Engineering，Central South University，Changsha 410083，China） |
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| Abstract: | With the aid of FLAC3D software，a model of hydraulic cutting seam was established，the cross section of 12 m at the front of a heading face was taken as the research object，and the slotting scheme under three different width slots，such as single slot，double slot and multi slot，was simulated.And the variation of internal stress and vertical displacement of coal before and after the seam slotted near gas extraction drilling，and the vertical displacement and plastic zone of coal body in a direction perpendicular to drilling，were obtained.The results showed that:when the width of slot is 2 000 mm，the pressure relief effect of borehole is obvious，the displacement of coal body is larger，the plastic zone around the borehole is damaged greatly，and the borehole is in the most stable state. |
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| Keywords: | ,hydraulic cutting seam, parameters optimization, gas extraction, borehole pressure relief |
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