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[1]张学博,高建良.深部开采松软煤层抽采钻孔变形特性研究[J].中国安全生产科学技术,2017,13(8):152-158.[doi:10.11731/j.issn.1673-193x.2017.08.024]
 ZHANG Xuebo,GAO Jianliang.Study on deformation characteristics of drainage borehole in soft coal seam with deep mining[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2017,13(8):152-158.[doi:10.11731/j.issn.1673-193x.2017.08.024]
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深部开采松软煤层抽采钻孔变形特性研究
分享到:

《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
13
期数:
2017年8期
页码:
152-158
栏目:
现代职业安全卫生管理与技术
出版日期:
2017-08-31

文章信息/Info

Title:
Study on deformation characteristics of drainage borehole in soft coal seam with deep mining
文章编号:
1673-193X(2017)-08-0152-07
作者:
张学博123高建良123
(1.煤炭安全生产河南省协同创新中心,河南 焦作 454003;2.河南省瓦斯地质与瓦斯治理重点实验室—省部共建国家重点实验室培育基地,河南 焦作 454003;3.河南理工大学 安全科学与工程学院,河南 焦作 454003)
Author(s):
ZHANG Xuebo123 GAO Jianliang123
(1. Coal Production Safety Collaborative Innovation Center in Henan Province, Jiaozuo Henan 454003, China; 2. State Key Laboratory Cultivation Base for Gas Geology and Gas Control, Jiaozuo Henan 454003, China; 3. College of Safety Science and Engineering, Henan Polytechnic University, Jiaozuo Henan 454003, China)
关键词:
松软煤层变形特征抽采钻孔渗透特性
Keywords:
soft coal seam deformation characteristics drainage borehole permeability characteristics
分类号:
X43
DOI:
10.11731/j.issn.1673-193x.2017.08.024
文献标志码:
A
摘要:
为了研究深部开采松软煤层抽采钻孔变形失稳特性,基于有限元理论和统计损伤理论数值模拟了深部开采松软煤层抽采钻孔变形失稳整个过程,分析了钻孔周围煤体应力及形变分布、卸压区演化和渗透特性。研究表明:钻孔破坏形式为上方发生垮塌,形成垮塌区;左右侧发生破坏,形成破碎区;钻孔周围煤体均向钻孔移动,钻孔附近煤体位移量较大,远处煤体位移量相对较小;钻孔形状由开始的圆形逐渐变成“类橄榄球形”,然后钻孔“类橄榄球形”断面逐渐减小至坍塌。钻孔失稳过程中,钻孔附近煤体渗透率逐渐增大,钻孔周围煤体渗透率变化量及变化范围均不断增加;周围煤体渗透率分布均大致呈“V”字型变化规律,即煤体渗透率呈随着距钻孔距离的增加先减小后增加然后趋于稳定的趋势。研究结果可以为我国煤矿深部开采松软煤层瓦斯治理和煤层瓦斯抽采提供理论支撑,具有指导性意义。
Abstract:
To study the deformation and failure characteristics of drainage borehole in soft coal seam with deep mining, the whole process of deformation and failure of drainage borehole in soft coal seam with deep mining was simulated based on the finite element theory and the statistical damage theory. The stress and deformation distribution, the evolution of pressure relief zone and the permeability characteristics of the coal body around the borehole were analyzed. The results showed that the damage form of borehole was upper collapse and side damage, with the formation of the collapse zone and fracture zone respectively. All the coal body around the borehole moved to the borehole, and the displacement of coal was larger near the borehole and relatively smaller in the distance. The shape of borehole changed from the initial circle to a 'rugby like' shape gradually, and then the 'rugby like' shape section of borehole reduced gradually until the collapse. In the process of borehole failure, the permeability of coal body around the borehole increased gradually, and both the variation quantity and variation range of coal body around the borehole increased gradually. The permeability distribution of surrounding coal body substantially presented the 'V' shape variation law, namely the permeability of coal body presented the trend of first decrease, then increase, and tend to be stable with the increase of distance away from the borehole. The research results can provide the theoretical support for the gas control and gas drainage in soft coal seam with deep mining in China, with a guiding significance.

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备注/Memo

备注/Memo:
国家自然科学基金项目(51174079);教育部“长江学者和创新团队发展计划”创新团队项目(IRT1235);河南省基础与前沿技术研究计划(142300413233)
更新日期/Last Update: 2017-09-11