不同应力路径下含瓦斯煤岩渗流特性与声发射特征实验研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (241 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract A series of tests on characteristics of acoustic emission(AE) and seepage have been performed on gas-filled coal under conditions of conventional triaxial path and unloading confining pressure path. The difference in characteristics of AE and seepage of coal during failure process under two paths is studied. The results show that characteristics of AE and seepage change with stress paths. In the two paths tests，stress，gas flow and AE signal of gas-filled coal have good correlations；and the curve of gas flow has the similar change rules. The suffering point of gas flow lags in conventional triaxial path，but also an obvious and direct correspondence exists between the suffering point of gas flow and starting point under the unloading confining pressure path. Compared with the conventional triaxial path，the cumulative damage is bigger under the unloading confining pressure path. The curve slope of AE cumulative ringing from unloading confining pressure starting point increases obviously，and experiences a sharp increase in failure point. In the two paths tests，AE amplitude curves have different variations；and AE amplitude curves of gas-filled coal show a bimodal state bounded by the starting point under unloading confining pressure path.

Key words： rock mechanics conventional triaxial test unloading confining pressure seepage characteristics characteristics of acoustic emission

Received: 16 January 2013

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors

Cite this article:

URL:

https://rockmech.whrsm.ac.cn/EN/Y2013/V32/I7/1315

[1]	赵洪宝，李振华，仲淑姮，等. 单轴压缩状态下含瓦斯煤岩力学特性试验研究[J]. 采矿与安全工程学报，2010，27(1)：131-134. (ZHAO Hongbao，LI Zhenhua，ZHONG Shuheng，et al. Experimental study of mechanical properties of coal rock containing gas under uniaxial compression[J]. Journal of Mining and Safety Engineering，2010，27(1)：131-134.(in Chinese)) " target="_blank">
[2]	尹光志，黄启翔，张东明，等. 地应力场中含瓦斯煤岩变形破坏过程中瓦斯渗透特性的试验研究[J]. 岩石力学与工程学报，2010，29(2)：336-343.(YIN Guangzhi，HUANG Qixiang，ZHANG Dongming，et al. Test study of gas seepage characteristics of gas- bearing coal specimen during process of deformation and failure in geostress field[J]. Chinese Journal of Rock Mechanical and Engineering，2010，29(2)：336-343.(in Chinese))
[3]	李小双，尹光志，赵洪宝，等. 含瓦斯突出煤三轴压缩下力学性质试验研究[J]. 岩石力学与工程学报，2010，29(增1)：3 350-3 358. (LI Xiaoshuang，YIN Guangzhi，ZHAO Hongbao，et al. Experimental study of mechanical properties of outburst coal containing gas under triaxial compression[J]. Chinese Journal of Rock Mechanical and Engineering，2010，29(Supp.1)：3 350-3 358.(in Chinese)) " target="_blank">
[4]	胡国忠，王宏图，范晓刚，等. 低渗透突出煤的瓦斯渗流规律研究[J]. 岩石力学与工程学报，2009，28(12)：2 527-2 534.(HU Guozhong，WANG Hongtu，FAN Xiaogang，et al. Investigation on law of methane gas flow in coal with coal-gas outburst hazard and low permeability[J]. Chinese Journal of Rock Mechanical and Engineering，2009，28(12)：2 527-2 534.(in Chinese)) " target="_blank">
[5]	陶云奇，许江，程明俊，等. 含瓦斯煤渗透理论分析与试验研究[J]. 岩石力学与工程学报，2009，28(增2)：3 363-3 370.(TAO Yunqi，XU Jiang，CHEN Mingjun，et al. Theoretical analysis and experimental study on permeability of gas-bearing coal[J]. Chinese Journal of Rock Mechanical and Engineering，2009，28(Supp.2)： 3 363-3 370.(in Chinese)) " target="_blank">
[6]	李树刚，钱鸣高，石平五. 煤样全应力-应变过程中的渗透系数-应变方程[J]. 煤田地质与勘探，2001，29(1)：22-24.(LI Shugang，QIAN Minggao，SHI Pingwu. Permeability-strain equation relation to complete stress strain path of coal sample[J]. Coal Geology and Exploration，2001，29(1)：22-24.(in Chinese)) " target="_blank">
[7]	曹树刚，白燕洁，李勇，等. 具突出危险原煤瓦斯渗流特性试验[J]. 重庆大学学报，2011，34(7)：91-95.(CAO Shugang，BAI Yanjie，LI Yong，et al. Experiments of coal? gas seepage with outburst dangers[J]. Journal of Chongqing University，2011，34(7)：91-95.(in Chinese))
[8]	尹光志，蒋长宝，王维忠，等. 不同卸围压速度对含瓦斯煤岩力学和瓦斯渗流特性影响试验研究[J]. 岩石力学与工程学报，2011，30(1)：68-76.(YIN Guangzhi，JIANG Changbao，WANG Weizhong，et al. Experimental study of influence of confining pressure unloading speed on mechanical properties and gas permeability of containing-gas coal rock[J]. Chinese Journal of Rock Mechanical and Engineering，2011，30(1)：68-76.(in Chinese))
[9]	赵洪宝，王家臣. 卸围压时含瓦斯煤力学性质演化规律试验研究[J]. 岩土力学，2011，32(增1)：270-274.(ZHAO Hongbao，WANG Jiachen. Experimental study of evolution law of mechanical properties of coal containing gas under unloading confining pressure[J]. Rock and Soil Mechanics，2011，32(Supp.1)：270-274.(in Chinese)) " target="_blank">
[10]	赵兴东，田军，李元辉，等. 花岗岩破裂过程中的声发射活动性研究[J]. 中国矿业，2006，15(7) ：74-76.(ZHAO Xingdong，TIAN Jun，LI Yuanhui，et al. Study of the activity during the failure process of granite samples[J]. China Mining Magazine，2006，15(7)：74-76. (in Chinese)) " target="_blank">
[11]	高峰，李建军，李肖音，等. 岩石声发射特征的分形分析[J]. 武汉理工大学学报，2005，27(7)：67-69.(GAO Feng，LI Jianjun，LI Xiaoyin，et al. Fractal analysis of the characteristics of acoustic emission of rock[J]. Journal of Wuhan University of Technology，2005，27(7)：67-69.(in Chinese)) " target="_blank">
[12]	谢强，张永兴，余贤斌. 石灰岩在单轴压缩条件下的声发射特性[J]. 重庆建筑大学学报，2002，24(1)：19-22.(XIE Qiang，ZHANG Yongxing，YU Xianbin. Study on acoustic emission character of limestone in uniaxial compression test[J]. Journal of Chongqing Jianzhu University，2002，24(1)：19-22.(in Chinese)) " target="_blank">
[13]	刘延保，曹树刚，李勇，等. 含瓦斯煤体破坏过程中AE序列关联维数演化分析[J]. 重庆大学学报，2012，35(3)：108-114.(LIU Yanbao，CAO Shugang，LI Yong，et al. Correlation dimension analysis of AE sequence under failure process of gas-filled coal[J]. Journal of Chongqing University，2012，35(3)：108-114.(in Chinese))
[14]	赵洪宝，尹光志. 含瓦斯煤声发射特性试验及损伤方程研究[J]. 岩土力学，2011，32(3)：667-671.(ZHAO Hongbao，YIN Guangzhi. Study of acoustic characteristics and damage equation of coal containing gas[J]. Rock and Soil Mechanics，2011，32(3)：667-671. (in Chinese)) " target="_blank">
[15]	许江，彭守建，尹光志，等. 含瓦斯煤热流固耦合三轴伺服渗流装置的研制及应用[J]. 岩石力学与工程学报，2010，29(5)：907-914.(XU Jiang，PENG Shoujian，YIN Guangzhi，et al. Development and application of triaxial servo-controlled seepage equipment for hot fluid solid coupling of coal containing methane[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：907-914.(in Chinese))