|本期目录/Table of Contents|

[1]王浩,赵耀江,潘玉婷,等.原煤力学及渗流特性的层理效应研究[J].中国安全生产科学技术,2021,17(4):24-29.[doi:10.11731/j.issn.1673-193x.2021.04.004]
　WANG Hao,ZHAO Yaojiang,PAN Yuting,et al.Study on bedding effect of mechanics and seepage characteristics of raw coal[J].JOURNAL OF SAFETY SCIENCE AND TECHNOLOGY,2021,17(4):24-29.[doi:10.11731/j.issn.1673-193x.2021.04.004]
点击复制

原煤力学及渗流特性的层理效应研究
分享到：

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

卷:
17
期数:
2021年4期
页码:
24-29
栏目:
学术论著
出版日期:
2021-04-30

文章信息/Info

Title:
Study on bedding effect of mechanics and seepage characteristics of raw coal
文章编号:
1673-193X(2021)-04-0024-06
作者:
王浩; 赵耀江; 潘玉婷; 赵亮; 王江涛
（太原理工大学 安全与应急管理工程学院，山西 太原 030000）
Author(s):
WANG Hao;  ZHAO Yaojiang;  PAN Yuting;  ZHAO Liang;  WANG Jiangtao
(School of Safety and Emergency Management Engineering,Taiyuan University of Technology,Taiyuan Shanxi 030000,China)
关键词:
平行层理; 垂直层理; 力学渗流特性; 声发射特征
Keywords:
parallel bedding;  vertical bedding;  mechanical seepage characteristics;  acoustic emission (AE) characteristic
分类号:
X936;TD712
DOI:
10.11731/j.issn.1673-193x.2021.04.004
文献标志码:
A
摘要:
为研究层理对原煤力学及渗流特性的影响，通过实验对比分析平行层理煤样和垂直层理煤样在相同瓦斯压力、不同围压下的三轴压裂力学及渗流特性，同时采集压裂过程的声发射数据并进行分析。结果表明：随着围压增大，平行层理煤样的峰值轴向应力平均增幅为34.5%，远小于垂直层理煤样的平均增幅161.21%；围压为1，3，5 MPa时，垂直层理煤样的压裂时间分别是平行层理煤样的0.68，0.19，2.72倍，层理方向对力学特性的影响随着围压增加呈先减小后增大的趋势；围压相同时，平行层理煤样的声发射幅值随时间增加而增大，垂直层理煤样的声发射幅值随时间增加表现出正弦波变化趋势，且平行层理煤样在压裂过程中的声发射高幅值事件比垂直层理煤样的多；平行层理煤样的渗透率远大于垂直层理煤样的渗透率，且围压越大，初始渗透率越低，说明平行层理方向的孔隙度大于垂直层理方向的孔隙度。
Abstract:
In order to study the influence of bedding on the mechanics and seepage characteristics of raw coal,the triaxial fracturing mechanics and seepage characteristics of parallel bedding and vertical bedding coal samples under the same gas pressure and different confining pressures were compared and analyzed through the experiments,and the acoustic emission (AE) data in the fracturing process were collected at the same time.The results showed that with the increase of confining pressure,the average increase of peak axial stress in parallel bedding coal samples was 34.5%,far less than the average increase of 161.21% in vertical bedding coal samples.The fracturing time of vertical bedding coal samples was 0.68,0.19 and 2.72 times that of parallel bedding coal samples,respectively,and the influence of bedding direction on the mechanical properties decreased first and then increased with the increase of confining pressure.Under the same confining pressure,the AE amplitude of parallel bedding coal samples increased with the increase of time,while that of vertical bedding coal samples presented the change trend of sine wave with the increase of time,and there were more AE highamplitude events during the fracturing process of parallel bedding coal samples than that of vertical bedding coal samples.The permeability of parallel bedding coal samples was much higher than that of vertical bedding coal samples,and the higher the confining pressure,the lower the initial permeability,which indicated that the porosity in the parallel bedding direction was greater than that in the vertical bedding direction.Therefore,the best direction of borehole was the vertical bedding direction when extracting gas in the underground coal mines.

参考文献/References:

［1］孙培德.变形过程中煤样渗透率变化规律的实验研究［J］.岩石力学与工程学报,2001(S1):1801-1804. SUN Peide.Test study on coal specimen permeability during solid deformation process［J］.Chinese Journal of Rock Mechanics and Engineering,2001(S1):1801-1804.
［2］孙培德,凌志仪.三轴应力作用下煤渗透率变化规律实验［J］.重庆大学学报(自然科学版),2000(S1):28-31. SUN Peide,LING Zhiyi.Experimental study of the law for permeability of coal under action of 3-triaxial compression［J］.Journal of Chongqing University(Natural Science Edition),2000(S1):28-31.
［3］魏建平,李明助,王登科，等.煤样渗透率围压敏感性试验研究［J］.煤炭科学技术,2014,42(6):76-80. WEI Jianping,LI Mingzhu,WANG Dengke，et al.Experimental research on sensibility of coal samples permeability under confining pressure［J］.Coal Science and Technology,2014,42(6):76-80.
［4］薄冬梅,赵永军,姜林.煤储层渗透性研究方法及主要影响因素［J］.油气地质与采收率,2008(1):18-21，112. BO Dongmei,ZHAO Yongjun,JIANG Lin.Research method and main influencing factors of coal reservoir permeability［J］.Petroleum Geology and Recovery Efficiency,2008(1):18-21,112.
［5］徐超,王硕,王一然，等.加卸载速率对含瓦斯煤损伤-渗透时效特性影响试验研究［J］.煤炭科学技术,2018,46(5):93-101. XU Chao,WANG Shuo,WANG Yiran,et al.Experiments study on effects of loading and unloading rates on damage-permeability aging characteristics of gas-bearing coal［J］.Coal Science and Technology,2018,46(5):93-101.
［6］魏建平,位乐,王登科.含水率对含瓦斯煤的渗流特性影响试验研究［J］.煤炭学报,2014,39(1):97-103. WEI Jianping,WEI Le,WANG Dengke.Experimental study of moisture content influences on permeability of coal containing gas［J］.Journal of China Coal Society,2014,39(1):97-103.
［7］WANG H C,FU X H,JIAN K,et al.Changes in coal pore structure and permeability during N2 injection［J］.Journal of Natural Gas Science and Engineering,2015,27:1234-1241.
［8］马占国,茅献彪,李玉寿，等.温度对煤力学特性影响的实验研究［J］.矿山压力与顶板管理,2005(3):46-48.
［9］PERERA M S A,RANJITH P G,CHOI S K,et al.Investigation of temperature effect on permeability of naturally fractured black coal for carbon dioxide movement:an experimental and numerical study［J］.Fuel,2012,94:596-605.
［10］康向涛,黄滚,宋真龙，等.三轴压缩下含瓦斯煤的能耗与渗流特性研究［J］.岩土力学,2015,36(3):762-768. KANG Xiangtao,HUANG Gun,SONG Zhenlong,et al.Research on characteristics of energy dissipation and seepage of coal containing gas under triaxial compression［J］.Rock and Soil Mechanics,2015,36(3):762-768.
［11］付裕,陈新,冯中亮.基于CT扫描的煤岩裂隙特征及其对破坏形态的影响［J］.煤炭学报,2020,45(2):568-578. FU Yu,CHEN Xin,FENG Zhongliang.Characteristics of coal-rock fractures based on CT scanning and its influence on failure modes［J］.Journal of China Coal Society,2020,45(2):568-578.
［12］莫云龙,李宏艳,孙中学，等.原生裂隙结构对煤岩物理力学特性影响分析［J］.煤炭科学技术,2020,48(5):25-34. MO Yunlong,LI Hongyan,SUN Zhongxue,et al.Analysis on effect of primary fractures structure on physical and mechanical properties of coal rock［J］.Coal Science & Technology,2020,48(5)：25-34.
［13］JASINGE D,RANJITH P G,CHOI S K.Effects of effective stress changes on permeability of latrobe valley brown coal［J］.Fuel,2011,90(3):1292-1300.
［14］WANG S,ELSWORTH D,LIU J.Mechanical behavior of methane infiltrated coal:the roles of gas desorption,stress level and loading rate［J］.Rock Mechanics and Rock Engineering,2013,46(5):945-958.
［15］ALAM M S,CHAKRABORTY T,MATSAGAR V,et al.Characterization of kota sandstone under different strain rates in uniaxial loading［J］.Geotechnical and Geological Engineering,2015,33(1):143-152.

相似文献/References:

备注/Memo

备注/Memo:
收稿日期： 2020-11-05
作者简介： 王浩，硕士研究生，主要研究方向为煤层的力学及渗流特性。
更新日期/Last Update: 2021-05-09