考虑煤体蠕变位移的水力扩孔合理扩煤量

doi:10.16265/j.cnki.issn1003-3033.2017.03.020

中国安全科学学报 ›› 2017, Vol. 27 ›› Issue (3): 111-116.doi: 10.16265/j.cnki.issn1003-3033.2017.03.020

考虑煤体蠕变位移的水力扩孔合理扩煤量

刘威^1,2, 张敬军^3,4 高级工程师, 亢方超^1,2 工程师, 魏国营^1,2,3 教授, 闫江伟^1,2,3 副教授, 贾天让^1,2,3 副教授

1 河南理工大学安全科学与工程学院,河南焦作 454003
2 全国煤炭行业瓦斯地质与瓦斯防治工程研究中心,河南焦作 454003
3 煤炭安全生产河南省协同创新中心,河南焦作 454003
4 河南神火煤电股份有限公司,河南永城 476600

收稿日期:2016-12-24 修回日期:2017-02-19 出版日期:2017-03-28 发布日期:2020-11-22
作者简介:刘威 (1990—),男,河南洛阳人,硕士研究生,研究方向为瓦斯灾害防治技术。E-mail:137366523@qq.com。
基金资助:
教育部长江学者和创新团队发展计划项目(IRT1235);河南省产学研合作项目(162107000040)。

Reasonable coal amount of hydraulic flushing borehole considering creep displacement

LIU Wei^1,2, ZHANG Jingjun^3,4, KANG Fangchao^1,2, WEI Guoying^1,2,3, YAN Jiangwei^1,2,3, JIA Tianrang^1,2,3

1 School of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China
2 Research Center of the National Gas Geology and Gas Prevention Engineering, Jiaozuo Henan 454003, China
3 Collaborative Innovation Center of Coal Safety Production of Henan, Jiaozuo Henan 454003, China
4 Shenhuo Coal Power Stock Company,Yongcheng Henan 476600,China

Received:2016-12-24 Revised:2017-02-19 Online:2017-03-28 Published:2020-11-22

摘要/Abstract

摘要： 针对煤矿穿层水力扩孔孔硐体积过大,容易造成孔硐内瓦斯积聚,成为掘进过程中的致灾因素这一问题,采用FLAC^3D软件中Cvisc黏弹塑性模型,模拟薛湖煤矿不同扩煤量的穿层水力扩孔措施孔壁及周围煤体变形破坏过程;在薛湖煤矿底抽巷道开展穿层水力扩孔现场试验,将数值模拟结果与现场验证结果对比分析。结果表明,穿层水力扩孔技术措施完工后,受周围煤体压力影响,孔硐周围煤体快速进入塑性区并呈现蠕变特性,向扩孔中心整体径向移动,扩孔孔壁在持续的蠕变过程中变形破坏。对比分析扩孔后的孔硐体积变化程度,从安全生产的角度出发,最终确定适合薛湖煤矿的合理扩煤量为1.15 t/m。

关键词: 水力扩孔, 瓦斯积聚, FLAC^3D, 蠕变, 合理扩煤量

Abstract: Oversized hydraulic flushing penetration boreholes can easily led to the gas accumulation in the holes,which has became one disaster factor at the heading face in the process of tunneling.To work out a reasonable size for the borhores at the Xuehu coal mine,a numerical simulation by using the model of Cvisc in the FLAC^3D and a field monitoring activity were undertaken. One comparative analysis was conducted between the numerical simulation results and the field monitoring results.The result shows that influenced by the stress of coal steam ,the coal surrounding the borehole turns plastic and has creep characteristics quickly, and moves radially toward the center of the borehole after completion of the hydraulic flushing measures, and that the reasonable coal amount of the hydraulic flushing boreholes in Xuehu coal mining districts is 1.15 t/m.

Key words: hydraulic flushing, gas accumulation, FLAC^3D, crreep characteristics, reasonable amount of coal

中图分类号:

X936

刘威, 张敬军, 亢方超, 魏国营, 闫江伟, 贾天让. 考虑煤体蠕变位移的水力扩孔合理扩煤量[J]. 中国安全科学学报, 2017, 27(3): 111-116.

LIU Wei, ZHANG Jingjun, KANG Fangchao, WEI Guoying, YAN Jiangwei, JIA Tianrang. Reasonable coal amount of hydraulic flushing borehole considering creep displacement[J]. China Safety Science Journal, 2017, 27(3): 111-116.

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考虑煤体蠕变位移的水力扩孔合理扩煤量

Reasonable coal amount of hydraulic flushing borehole considering creep displacement

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