[1]宋浩然,林柏泉,赵 洋,等.各向异性和非均质性对煤层抽采钻孔瓦斯渗流的影响作用机制[J].西安科技大学学报,2019,(03):461-468482.[doi:10.13800/j.cnki.xakjdxxb.2019.0311]
 SONG Hao-ran,LIN Bai-quan,ZHAO Yang,et al.Effect mechanism of anisotropy and heterogeneity on gas seepage during coal seam drainage[J].Journal of Xi'an University of Science and Technology,2019,(03):461-468482.[doi:10.13800/j.cnki.xakjdxxb.2019.0311]
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各向异性和非均质性对煤层抽采钻孔瓦斯渗流的影响作用机制(/HTML)
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西安科技大学学报[ISSN:1672-9315/CN:61-1434/N]

卷:
期数:
2019年03期
页码:
461-468482
栏目:
目次
出版日期:
2019-05-30

文章信息/Info

Title:
Effect mechanism of anisotropy and heterogeneity on gas seepage during coal seam drainage
文章编号:
1672-9315(2019)03-0461-08
作者:
宋浩然12林柏泉12赵 洋12孔 佳12查 伟12
(1.中国矿业大学 煤矿瓦斯与火灾防治教育部重点实验室,江苏 徐州 221116; 2.中国矿业大学 安全工程学院,江苏 徐州 221116)
Author(s):
SONG Hao-ran12LIN Bai-quan12ZHAO Yang12KONG Jia12ZHA Wei12
(1.Key Laboratory of Coal Methane and Fire Control,Ministry of Education, China University of Mining and Technology,Xuzhou 221116,China; 2.School of Safety Engineering,China University of Mining and Technology,Xuzhou 221116,China)
关键词:
瓦斯抽采 非均质性 各向异性 多场耦合 数值模拟
Keywords:
gas drainage heterogeneity anisotropy multiphysics coupling numerical simulation
分类号:
TD 823
DOI:
10.13800/j.cnki.xakjdxxb.2019.0311
文献标志码:
A
摘要:
为提高深部煤层瓦斯抽采效率,研究抽采钻孔周围煤体的瓦斯渗流规律十分关键。文中基于煤体的各向异性和非均质性,考虑煤体应力变形场和瓦斯渗流场的交叉耦合作用,分析了煤层抽采中水力割缝钻孔周围瓦斯压力以及渗透率的时空演化规律。结果表明:煤体的各向异性和非均质性影响割缝钻孔周围的瓦斯渗流规律。对于瓦斯压力的变化,平行层理方向瓦斯压力降幅大于垂直层理方向,抽采影响范围分布呈现“椭圆形”,煤体各向异性表征明显。对于渗透率的变化,平行层理方向的煤层渗透率高于垂直层理方向,抽采初期渗透率的增加幅度较快,随后逐渐减缓,渗透率变化曲线呈现不规则“锯齿形”,煤体非均质性表征明显。将数值模拟结果与杨柳矿4#钻场瓦斯抽采的实际监测情况相互对比,现场实测的瓦斯抽采情况与模拟得到情况基本吻合,从而验证了数值模拟的合理性及工程适用性。
Abstract:
In order to improve gas drainage efficiency of deep coal seams,it is very important to study the gas seepage law of coal bodies around the extraction borehole.Based on the anisotropy and heterogeneity of coal body,considering the cross-coupling effect of coal stress-deformation field and gas seepage field,the space-time evolution law of gas pressure and permeability around the borehole in the extraction process was analyzed.The results show that the anisotropy and heterogeneity of the coal affect the gas flow law around the borehole.For the change of gas pressure,the gas pressure decrease in the parallel bedding direction is larger than that in the vertical bedding direction,and the distribution of the influence range of the extraction is “elliptic”,and the anisotropy of the coal body is obviously characterized.For the change of permeability,the permeability of coal seam in parallel bedding direction is higher than that of vertical bedding.The increase of permeability in the initial stage of extraction is faster,and then gradually slows down.The curve of permeability shows irregular “zigzag” and coal body heterogeneity is clearly characterized.The numerical simulation results were compared with the actual monitoring situation of the gas drainage in the 4# drilling site of Yangliu Mine.The actual gas extraction in the field is basically consistent with the simulated situation,which verifies the rationality of the numerical simulation and the applicability of the engineering practice.

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相似文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-01-11 责任编辑:杨泉林 基金项目:国家重点研发计划(2016YFC0801402); 国家自然科学基金(51474211); 江苏省研究生科研与实践创新计划(SJCX18_0667) 第一作者:宋浩然(1993-),男,河南郑州人,硕士研究生,E-mail:414708634@qq.com 通信作者:林柏泉(1960-),男,福建龙岩人,教授,博士生导师,E-mail:lbq21405@126.com 宋浩然,林柏泉,赵 洋,等.各向异性和非均质性对煤层抽采钻孔瓦斯渗流的影响作用机制[J].西安科技大学学报,2019,39(3):461-468,482. SONG Hao-ran,LIN Bai-quan,ZHAO Yang,et al.Effect mechanism of anisotropy and heterogeneity on gas seepage during coal seam drainage[J].Journal of Xi'an University of Science and Technology,2019,39(3):461-468,482.
更新日期/Last Update: 2019-05-30