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[1]赵鑫,肖晓春,潘一山,等.超声机械效应致裂煤岩增渗规律研究[J].中国安全生产科学技术,2016,12(5):151-157.[doi:10.11731/j.issn.1673-193x.2016.05.026]
 ZHAO Xin,XIAO Xiaochun,PAN Yishan,et al.Research on permeability enhancement laws of coalfracturing by ultrasound mechanical effect[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2016,12(5):151-157.[doi:10.11731/j.issn.1673-193x.2016.05.026]
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超声机械效应致裂煤岩增渗规律研究
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《中国安全生产科学技术》[ISSN:1673-193X/CN:11-5335/TB]

卷:
12
期数:
2016年5期
页码:
151-157
栏目:
现代职业安全卫生管理与技术
出版日期:
2016-05-30

文章信息/Info

Title:
Research on permeability enhancement laws of coal fracturing by ultrasound mechanical effect
作者:
赵鑫1肖晓春1潘一山1徐军2李鑫1
(1. 辽宁工程技术大学 力学与工程学院,辽宁 阜新 123000; 2. 东南大学 工程力学系,江苏 南京 210096 )
Author(s):
ZHAO Xin1 XIAO Xiaochun1 PAN Yishan1 XU Jun2 LI Xin1
(1. School of Mechanics and Engineering, Liaoning Technical University, Fuxin Liaoning 123000, China; 2. Department of Engineering Mechanics, Southeast University, Nanjing Jiangsu 210096, China)
关键词:
超声机械效应声发射有效声压裂纹渗透率
Keywords:
ultrasound mechanical effect acoustic emission effective sound pressure crack permeability
分类号:
X936
DOI:
10.11731/j.issn.1673-193x.2016.05.026
文献标志码:
A
摘要:
超声机械效应致裂煤岩过程中裂纹的萌生、扩展过程及增渗规律仅凭借物理实验无法得到,煤岩破裂能量变化、煤岩应力-应变关系及储层渗透特性变化缺乏深入的研究。结合CT观测及渗透率的气测实验对煤岩破裂声发射、有效声压及声波对煤岩体裂纹扩展规律进行了深入探讨;开展了超声机械效应致裂煤岩的数值试验研究。结果表明:煤岩破裂过程应力变化率和煤岩声发射现象具有一致性;有效声压的增大有利于裂纹扩展和贯穿,使煤岩体内部原本互不相通的裂纹裂隙形成了相互贯通的网络,从而提高了煤岩的渗透率。
Abstract:
The ultrasound mechanical effect is one of the major effects of coal fracturing. The initiation and propagation processes of crack and the laws of permeability enhancement for coal fracturing by ultrasound mechanical effect can't be obtained only by physical experiment, and people have not made deep research on the energy change of coal fracturing, the stress-strain relation of coal and the change in permeability characteristics of coal reservoir. Combined CT observation with gas measuring test on permeability, the crack propagation laws of coal under the effect of acoustic emission, effective sound pressure and sound waves in coal fracturing were discussed in detail, then the numerical experiments on coal fracturing by ultrasound mechanical effect were conducted. The results showed that the changing rate of stress is consistent with acoustic emission phenomenon of coal in coal fracturing process. The increase of effective sound pressure is beneficial to the extend and breakthrough of the cracks, which make the cracks and fissures being mutually unintelligible inside the coal originally form the interpenetration network, thus increase the permeability of coal.

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备注/Memo

备注/Memo:
国家自然科学基金面上项目(51374123);国家自然科学基金青年科学基金项目(51004061);国家自然科学基金青年科学基金项目(51504122);2014年辽宁省优秀人才支持计划(LJQ2014043)
更新日期/Last Update: 2016-06-17