煤体吸附瓦斯膨胀变形效应的试验研究

Abstract
Figure/Table
References
Related Citation (15)

Download: PDF (398 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to investigate the unique mechanical behavior of swelling deformation effect of coal induced by gas adsorption，the self-developed meso-mechanical testing apparatus of coal containing gas is used to perform the adsorbed swelling deformation test under different gas pressures. The results show as follows：(1) The swelling deformation and time curves of the same coal specimen under different gas pressures have the same variation law. The strain change rate of coal specimen decreases with time until it reaches a stable value. (2) The swelling deformation of coal specimen shows anisotropy. The total trends of strains perpendicular to the bedding and parallel to the bedding are consistence. Because crack distributions are different in the coal，the deformation perpendicular to the bedding is greater than that parallel to bedding. (3) The gas adsorption quantity of coal and its volumetric strain present a good linear relationship. Based on this，the swelling deformation equation is established considering temperature，moisture，ash，anisotropy and other factors. (4) Using the linear relationship between absorbed deformation stress and constrained deformation，and relationship of adsorption deformation and gas pressure，the calculation method of absorbed swelling stress is obtained. (5) The adsorbed swelling deformation of coal is irreversible；and the value of residual strain increases as the adsorbed gas pressure becomes larger. Swelling deformation effect of coal induced by gas adsorption is important for engineering application. It can be used as an assistant index of coal seam outburst risk assessment，and also can be used in gas permeability study of coal seam.

Key words： mining engineering coal and gas outburst coal containing gas gas adsorption swelling effect gas permeability

Received: 24 May 2010

	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/Y2010/V29/I12/2484

[1] ХОДОТ B B. 煤与瓦斯突出机制[M]. 宋世钊，王佑安译. 北京：中国工业出版社，1966.(ХОДОТ B B. Mechanism of coal and gas outburst[M]. Translated by SONG Shizhao，WANG Youan. Beijing：China Industry Press，1966.(in Chinese)) [2] 周世宁，林柏泉. 煤层瓦斯赋存与流动理论[M]. 北京：煤炭工业出版社，1999.(ZHOU Shining，LIN Boquan. The theory of gas flow and storage in coal seams[M]. Beijing：China Coal Industry Publishing House，1999.(in Chinese)) [3] 俞启香. 矿井瓦斯防治[M]. 徐州：中国矿业大学出版社，1992.(YU Qixiang. Mine gas prevention and control[M]. Xuzhou：China University of Mining and Technology Press，1992.(in Chinese)) [4] 于不凡. 煤矿瓦斯灾害防治及利用技术手册[M]. 北京：煤炭工业出版社，2005.(YU Bufan. Technical manual of coal mine gas disasters prevention and utilization[M]. Beijing：China Coal Industry Publishing House，2005.(in Chinese)) [5] 周世宁，鲜学福，朱旺喜. 煤矿瓦斯灾害防治理论战略研讨[M]. 徐州：中国矿业大学出版社，2001.(ZHOU Shining，XIAN Xuefu，ZHU Wangxi. Discussion on strategy for developing theory of coal mine gas disasters prevention and control[M]. Xuzhou：China University of Mining and Technology Press，2001.(in Chinese)) [6] 何学秋. 含瓦斯煤岩流变动力学[M]. 徐州：中国矿业大学出版社，1995.(HE Xueqiu. Rheological dynamics of coal rock containing gas[M]. Xuzhou：China University of Mining and Technology Press，1995.(in Chinese)) [7] KARACAN C O. Heterogeneous sorption and swelling in a confined and stressed coal during CO2 injection[J]. Energy and Fuels，2003，17(6)：1 595–1 608. [8] KARACAN C O. Swelling-induced volumetric strains internal to a stressed coal associated with CO2 sorption[J]. International Journal of Coal Geology，2007，72(3–4)：209–220. [9] GAO H，MASAKUTSA N，MURATA S，et al. Statistical distribution characteristics of pyridine transport in coal particles and a series of new phenomenological models for overshoot and non-overshoot solvent swelling of coal particles[J]. Energy and Fuels，1999，13(2)：518–528. [10] 桑树勋，朱炎铭，张时音. 煤吸附气体的固气作用机制(I)——煤孔隙结构与固气作用[J]. 天然气工业，2005，25(1)：13–15.(SANG Shuxun，ZHU Yanming，ZHANG Shiyin. Solid-gas interaction mechanism of coal-absorbed gas(I)—coal pore structure and solid-gas interaction[J]. Natural Gas Industry，2005，25(1)：13–15.(in Chinese)) [11] 桑树勋，朱炎铭，张井. 煤吸附气体的固气作用机制(II)——煤吸附气体的物理过程与理论模型[J]. 天然气工业，2005，25(1)：16–18.(SANG Shuxun，ZHU Yanming，ZHANG Jing. Solid-gas interaction mechanism of coal-absorbed gas(II)—physical process and theoretical model of coal-adsorbed gas[J]. Natural Gas Industry，2005，25(1)：16–18.(in Chinese)) [12] 苏现波，陈润，林晓英，等. 吸附势理论在煤层气吸附–解吸中的应用[J]. 地质学报，2008，82(10)：830–837.(SU Xianbo，CHEN Run，LIN Xiaoying，et al. Application of adsorption potential theory in the fractionation of coalbed gas during the process of adsorption- desorption[J]. Acta Geologica Sinica，2008，82(10)：830–837.(in Chinese)) [13] 苏现波，张丽萍，林晓英. 煤阶对煤的吸附能力的影响[J]. 天然气工业，2005，25(1)：19–21.(SU Xianbo，ZHANG Liping，LIN Xiaoying. Influence of coal rank on coal adsorption capacity[J]. Natural Gas Industry，2005，25(1)：19–21.(in Chinese)) [14] 崔永君，张群，张泓. 不同煤级对CH4，N2和CO2单组份气体的吸附[J]. 天然气工业，2005，25(1)：61–65.(CUI Yongjun，ZHANG Qun，ZHANG Hong. Adsorption of different rank coals to single component gases[J]. Natural Gas Industry，2005，25(1)：61–65.(in Chinese)) [15] 张小东，秦勇，桑树勋. 不同煤级煤及其萃余物吸附性能的研究[J]. 地球化学，2006，35(5)：567–574.(ZHANG Xiaodong，QIN Yong，SANG Shuxun. Adsorption capacity of different metamorphism coals and their residues[J]. Geochimica，2006，35(5)：567–574.(in Chinese)) [16] 潘一山，唐巨鹏，李成全. 煤层中气水两相运移的NMRI试验研究[J]. 地球物理学报，2008，51(5)：1 620–1 626.(PAN Yishan，TANG Jupeng，LI Chengquan. NMRI test on two-phase transport of gas-water in coal seam[J]. Chinese Journal of Geophysics，2008，51(5)：1 620– 1 626.(in Chinese)) [17] 桑树勋，朱炎铭，张井，等. 液态水影响煤吸附甲烷的试验研究：以沁水盆地南部煤储层为例[J]. 科学通报，2005，50(增1)：70–75.(SANG Shuxun，ZHU Yanming，ZHANG Jing，et al. Experimental study on the liquid affect gas adsorption：case study about southern Qinshui basin coal seam[J]. Chinese Science Bulletin，2005，50(Supp.1)：70–75.(in Chinese)) [18] 唐巨鹏，潘一山，李成全，等. 三维应力作用下煤层气吸附解吸特性试验[J]. 天然气工业，2007，27(7)：35–38.(TANG Jupeng，PAN Yishan，LI Chengquan，et al. Experimental study of adsorption and desorption of coalbed methane under three-dimensional stress[J]. Natural Gas Industry，2007，27(7)：35–38.(in Chinese)) [19] 白冰，李小春，刘延峰，等. CO2-ECBM中气固作用对煤体应力和强度的影响分析[J]. 岩土力学，2007，28(4)：823–826.(BAI Bing，LI Xiaochun，LIU Yanfeng，et al. Preliminary theoretical study on impact on coal caused by interactions between CO2 and coal[J]. Rock and Soil Mechanics，2007，28(4)：823–826.(in Chinese)) [20] 吴世跃，赵文. 含吸附煤层气煤的有效应力分析[J]. 岩石力学与工程学报，2005，24(10)：1 674–1 678.(WU Shiyue，ZHAO Wen. Analysis of effective stress in adsorbed methane-coal system[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(10)：1 674–1 678.(in Chinese)) [21] 潘哲军，CONNELL L. 煤的膨胀和收缩在二氧化碳增产煤层甲烷过程中的影响[J]. 中国煤层气，2007，4(1)：7–10.(PAN Zhejun，CONNELL L. Effects of coal matrix shrinkage and swelling on enhanced CBM recovery through CO2 sequestration[J]. China Coalbed Methane，2007，4(1)：7–10.(in Chinese)) [22] GOODMAN A L，FAVORS R N，HILL M M，et al. Structure changes in Pittsburgh No.8 coal caused by sorption of CO2 gas[J]. Energy and Fuels，2005，19(4)：1 759–1 760. [23] MAJEWSKA Z，ZIETEK J. Acoustic emission and volumetric strain induced in coal by the displacement sorption of methane and carbon dioxide[J]. Acta Geophysica，2008，56(2)：372–390. [24] MAJEWSKA Z，ZIETEK J. Acoustic emission and sorptive deformation induced in coals of various rank by the sorption-desorption of gas[J]. Acta Geophysica，2007，55(3)：324–343. [25] 刘延保. 基于细观力学试验的含瓦斯煤体变形破坏规律研究[博士学位论文][D]. 重庆：重庆大学，2009.(LIU Yanbao. Study on the deformation and damage rules of gas-filled coal base on meso- mechanical experiments[Ph. D. Thesis][D]. Chongqing：Chongqing University，2009.(in Chinese)) [26] 曹树刚，刘延保，李勇，等. 煤岩固–气耦合细观力学试验装置的研制[J]. 岩石力学与工程学报，2009，28(8)：1 681–1 690.(CAO Shugang，LIU Yanbao，LI Yong，et al. Research and development of testing apparatus of coal solid-gas coupled mesomechanics[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(8)：1 681– 1 690.(in Chinese)) [27] 黄运飞，孙广忠，成彬芳. 煤–瓦斯介质力学[M]. 北京：煤炭工业出版社，1993.(HUANG Yunfei，SUN Guangzhong，CHENG Binfang. Coal-gas media mechanics[M]. Beijing：China Coal Industry Publishing House，1993.(in Chinese))