三轴应力加卸载作用下损伤煤岩渗透率模型研究

doi:10.13722/j.cnki.jrme.2021.0053

Abstract
Figure/Table
References (0)
Related Citation (15)

Download: PDF (1238 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to study changes in permeability of coal in the process of damage and failure under stress loading and unloading，based on coal“cube”structure model，a triaxial stress loading-unloading damage coal permeability model was established by comprehensively considering the deformation of coal cleats and matrix due to the actions of damage，effective stress and adsorption/desorption under triaxial stress loading-unloading，and the permeability model was verified based on the experimental results. The research results show that the established permeability model can not only better reflect the change law of the damaged coal permeability under the action of triaxial stress loading and unloading，but also reflect the phenomenon that the effective stress has far greater influence on coal permeability than adsorption/desorption. When the load on the coal is lower than the peak strength，the coal is in a compressed state under the constant confining pressure and continuous axial compressive loading，and the gas permeability decreases；while reducing the confining pressure and continuously increasing the axial pressure，damage begins to occur inside the coal，and the gas permeability increases slowly. As a result，the overall gas permeability of coal exhibits a“V”-shaped development trend before failure. The increase in the permeability of coal after failure increases with increasing the initial confining pressure，and the initial permeability of coal increases with increasing the gas pressure. The research results can provide theoretical support for the high-efficiency gas drainage and gas disaster prevention and control in my country¢s deep coal mining face，and have guiding significance.

Key words： mining engineering coal rock permeability model stress loading and unloading damage and failure fracture deformation

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	BAI Xin1
	2
	WANG Dengke2
	TIAN Fuchao3
	ZHANG Dongming4
	LI Haojun5
	REN Fake3

Cite this article:

BAI Xin1,2,WANG Dengke2, et al. Permeability model of damaged coal under triaxial stress loading-unloading[J]. , 2021, 40(8): 1536-1546.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2021.0053 OR https://rockmech.whrsm.ac.cn/EN/Y2021/V40/I8/1536

[1]	谢和平，高峰，鞠杨. 深部岩体力学研究与探索[J]. 岩石力学与工程学报，2015，34(11)：2 161-2 178.(XIE Heping，GAO Feng，JV Yang. Research and development of rock mechanics in deep ground engineering[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(11)：2 161-2 178.(in Chinese))
[2]	俞启香，程远平. 矿井瓦斯防治[M]. 徐州：中国矿业大学出版社，2012：10-62.(YU Qixiang，CHENG Yuanping. Coal mine gas contro[M]. Xuzhou：China University of Mining and Technology press，2012：10-62.(in Chinese))
[3]	GRAY I. Reservoir engineering in coal seams：part 1 the physical process of gas storage and movement in coal seams[J]. Spe Reservoir Engineering，1987，2(1)：28-34.
[4]	SEIDLE J P，JEANSONNE M W，ERICKSON D J. Application of matchstick geometry to stress dependent permeability in coals[C]// The SPE rocky mountain regional meeting. Beijing：Society of Petroleum Engineers，1992：433-444.
[5]	SHI J Q，DURUCAN S. Drawdown induced changes in permeability of coalbeds：a new interpretation of the reservoir response to primary recovery[J]. Transport in Porous Media，2004，56(1)：1-16.
[6]	PALMER I，MANSOORI J. How permeability depends on stress and pore pressure in coalbeds：a new model[J]. Spe Reservoir Evaluation and Engineering，1998，1(6)：539-544.
[7]	SEIDLE J，HUITT L G. Experimental measurement of coal matrix shrinkage due to gas desorption and implications for cleat permeability increases[C]// The SPE Annual Technical conference and Exhibition. Beijing：Society of Petroleum Engineers，1995：14-17.
[8]	CONNELL L D，LU M，PAN Z. An analytical coal permeability model for tri-axial strain and stress conditions[J]. International Journal of Coal Geology，2010，84(2)：103-114.
[9]	赵阳升，秦惠增. 煤层瓦斯流动的固-气耦合数学模型及数值解法的研究[J]. 固体力学学报，1994，(1)：49-57.(ZHAO Yangsheng，QIN Huizeng. A mathematical model for solid-gas coupled problems on the methane flowing in coal seam[J]. Acta Mechanica Solida Sinica，1994，(1)：49-57.(in Chinese))
[10]	傅雪海，秦勇，张万红. 高煤级煤基质力学效应与煤储层渗透率耦合关系分析[J]. 高校地质学报，2003，9(3)：373-377.(FU Xuehai，QIN Yong，ZHANG Wanhong. Coupling correlation between high-rank coal matrix mechanic effect and coal reservoir permeability[J]. Geological Journal of China Universities，2003，9(3)：373-377.(in Chinese))
[11]	周军平，鲜学福，姜永东，等. 考虑有效应力和煤基质收缩效应的渗透率模型[J]. 西南石油大学学报：自然科学版，2009，31(1)：4-8.(ZHOU Junping，XIAN Xuefu，JIANG Yongdong，et al. A permeability model considering the effective stress and coal matrix shrinking effect[J]. Journal of Southwest Petroleum University，2009，31(1)：4-8.(in Chinese))
[12]	许江，曹偈，李波波，等. 煤岩渗透率对孔隙压力变化响应规律的试验研究[J]. 岩石力学与工程学报，2013，32(2)：225-230.(XU Jiang，CAO Jie，LI Bobo，et al. Experimental research on response law of permeability of coal to pore pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32(2)：225-230.(in Chinese))
[13]	王登科，彭明，付启超，等. 瓦斯抽采过程中的煤层透气性动态演化规律与数值模拟[J]. 岩石力学与工程学报，2016，35(4)：704-712.(WANG Dengke，PENG Ming，FU Qichao，et al. Evolution and numerical simulation of coal permeability during gas drainage in coal seams[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(4)：704-712.(in Chinese))
[14]	王登科，魏建平，尹光志. 复杂应力路径下含瓦斯煤渗透性变化规律研究[J]. 岩石力学与工程学报，2012，31(2)：303-310.(WANG Dengke，WEI Jianping，YIN Guangzhi. Investigation on change rule of permeability of coal containing gas under complex stress paths[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(2)：303-310.(in Chinese))
[15]	谢和平，周宏伟，刘建锋，等. 不同开采条件下采动力学行为研究[J]. 煤炭学报，2011，36(7)：1 067-1 074.(XIE Heping，ZHOU Hongwei，LIU Jianfeng，et al. Mining-induced mechanical behavior in coal seams under different mining layouts[J]. Journal of China Coal Society，2011，36(7)：1 067-1 074.(in Chinese))
[16]	谢和平，张泽天，高峰，等. 不同开采方式下煤应力场-裂隙场-渗流场行为研究[J]. 煤炭学报，2016，41(10)：2 405-2 417.(XIE Heping，ZHANG Zetian，GAO Feng，et al. Stress-fracture- seepage field behavior of coal under different mining layouts[J]. Journal of China Coal Society，2016，41(10)：2 405-2 417.(in Chinese))
[17]	ZHANG Z T，ZHANG R，XIE H P，et al. Mining-induced coal permeability change under different mining layouts[J]. Rock Mechanics and Rock Engineering，2016，49(9)：1-16.
[18]	周宏伟，荣腾龙，牟瑞勇，等. 采动应力下煤体渗透率模型构建及研究进展[J]. 煤炭学报，2019，44(1)：221-235.(ZHOU Hongwei，RONG Tenglong，MOU Ruiyong，et al. Development in modeling approaches to mining-induced permeability of coals[J]. Journal of China Coal Society，2019，44(1)：221-235.(in Chinese))
[19]	程远平，刘洪永，郭品坤，等. 深部含瓦斯煤体渗透率演化及卸荷增透理论模型[J]. 煤炭学报，2014，39(8)：1 650-1 658.(CHENG Yuanping，LIU Hongyong，GOU Pinkun，et al. A theoretical model and evolution characteristic of mining-enhanced permeability in deeper gassy coal seam[J]. Journal of China Coal Society，2014，39(8)：1 650-1 658.(in Chinese))
[20]	荣腾龙，周宏伟，王路军，等. 开采扰动下考虑损伤破裂的深部煤体渗透率模型研究[J]. 岩土力学，2018，39(11)：3 983-3 992. (RONG Tenglong，ZHOU Hongwei，WANG Lujun，et al. A damage-based permeability models of deep coal under mining disturbance[J]. Rock and Soil Mechanics，2018，39(11)：3 983-3 992.(in Chinese))
[21]	薛熠，高峰，高亚楠，等. 采动影响下损伤煤岩体峰后渗透率演化模型研究[J]. 中国矿业大学学报，2017，46(3)：521-527.(XUE Yi，GAO Feng，GAO Yanan，et al. Research on mining-induced permeability evolution model of damaged coal in post-peak stage[J]. Journal of China University of Mining and Technology，2017，46(3)：521-527.(in Chinese))
[22]	XUE Y，GAO F，GAO Y N，et al. Quantitative evaluation of stress-relief and permeability-increasing effects of overlying coal seams for coal mine methane drainage in Wulan coal mine[J]. Journal of Natural Gas Science and Engineering，2016，32：122-137.
[23]	ZHANG Z T，ZHANG R，XIE H P，et al. An anisotropic coal permeability model that considers mining-induced stress evolution，microfracture propagation and gas sorption-desorption effects[J]. Journal of Natural Gas Science and Engineering，2017，46：664-679.
[24]	XUE Y，GAO F，LIU X G. Effect of damage evolution of coal on permeability variation and analysis of gas outburst hazard with coal mining[J]. Natural Hazards，2015，79(2)：999-1 013.
[25]	REISS L H. The reservoir engineering aspects of fractured formations[M]. Paris：Editions Technip，1980：67-76.
[26]	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 thermo-fluid-solid coupling of coal containing methane[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(5)：907-914.(in Chinese))
[27]	张东明，白鑫，齐消寒，等. 含层理岩石的AE特征分析及基于Kaiser效应的地应力测试研究[J]. 岩石力学与工程学报，2016，35(1)：87-97.(ZHANG Dongming，BAI Xin，QI Xiaohan，et al. Acoustic emission characteristics and in-situ stresses of bedding rock based on Kaiser effect[J]. Chinese Journal of Rock Mechanics and Engineering，2016，35(1)：87-97.(in Chinese))
[28]	中华人民共和国行业标准编写组. MT/T 752—1997 煤的甲烷吸附量测定方法(高压容量法)[S]. 北京：中国标准出版社，1997.(The Professional Standards Compilation Group of People¢s Republic of China. MT/T 752—1997 Determine method of methane adsorption capacity in coal[S]. Beijing：Standards Press of China，1997.(in Chinese))
[29]	FAN J J，FENG R M，WANG J，et al. Laboratory investigation of coal deformation behavior and its influence on permeability evolution during methane displacement by CO2[J]. Rock Mechanics and Rock Engineering，2017，50(7)：1-13.