不同相态CO2吸附作用下煤体力学性能研究

doi:10.13722/j.cnki.jrme.2023.0820

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

Download: PDF (1649 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract In order to investigate the effect of different phases of CO2 injected into difficult-to-mining coal seams on the mechanical properties of coal bodies. Taking the mining area of Inner Mongolia Mindong I Mine as an example，coal samples were put into a homemade triaxial adsorption and permeation apparatus，and the adsorption test of different phases of CO2 on the coal samples was carried out by regulating the temperature and pressure，so as to simulate the adsorption process of different phases of CO2 on the difficult-to-explore coal seams under the complex ground stress conditions. The uniaxial compression test was carried out on adsorbed coal samples，supplemented by an acoustic emission device. Changes in compressive strength，modulus of elasticity and acoustic emission energy of the coal body were obtained. Define the degradation of compressive strength and modulus of elasticity of the coal body，and take the cumulative energy of rupture acoustic emission of coal samples without CO2 adsorption as the baseline，and divide the high-energy zone and low-energy zone to get the evolution law of rupture behaviours and damage characteristics of coal samples after CO2 adsorption in different phases. The results show that：(1) CO2 adsorption weakens the mechanical parameters of coal samples, leading to changes in the macroscopic damage characteristics of the coal body and reducing its mechanical properties，and the total deterioration of the compressive strength of the coal body under the effect of CO2 adsorption ranges from 11.72% to 70.89%. (2) The total degradation of the elastic modulus of the coal body under CO2 adsorption ranges from 8.42% to 43.07%，and the total degradation of the coal body under CO2 adsorption in different phases is as follows：supercritical state adsorption group＞liquid state adsorption group＞gas state adsorption group. (3) After CO2 adsorption，more pores and fissures were formed inside the coal samples，resulting in a longer initial compaction time，and at the same time, the elastic deformation ability of the coal samples was weakened，and the elasticity stage of the coal samples adsorbed by gaseous CO2 lasted twice as long as that of the coal samples adsorbed by liquid CO2，and four times as long as that of the coal samples adsorbed by supercritical CO2. (4) Coal samples adsorbed by CO2，without CO2 adsorption of the total acoustic emission energy of the coal samples as a baseline，the division of high-energy and low-energy areas acoustic emission cumulative energy are in the high-energy area，compared with the unadsorbed coal samples，are produced to a certain extent of the rupture.

Key words： mining engineering adsorption of carbon dioxide in different phases uniaxial compression acoustic emission energy deterioration degree

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	TANG Jupeng1
	2
	ZHANG Xiao1
	LAI Tangrui1
	YU Honghao1

Cite this article:

TANG Jupeng1,2,ZHANG Xiao1, et al. Study on the mechanical properties of coal under the adsorption of CO2 in different phase states[J]. , 2024, 43(S2): 3621-3632.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0820 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/IS2/3621

[1]	孙海萍，张胜军，徐立昊，等. “双碳”目标下中国油气行业低碳发展措施与路径探讨[J]. 油气与新能源，2021，33(6)：27-31.(SUN Haiping，ZHANG Shengjun，XU Lihao，et al. Discussion on low-carbon development measures and paths of china’s oil and gas industry under the goals of “Dual Carbon”[J]. Etroleum And New Energy，2021，33(6)：27-31.(in Chinese))
[2]	BOURG I C，BECKINGHAM L E，DEPAOLO D J. The Nanoscale basis of CO2 trapping for geologic storage[J]. Environmental Science and Technology，2015，49(17)：10 265-10 284.
[3]	ZHANG K，LAU H C. Sequestering CO2 as CO2 hydrate in an offshore saline aquifer by reservoir pressure management[J]. Energy，2022，239：122231.
[4]	BOURG I C，BECKINGHAM L E，DEPAOLO D J. The nanoscale basis of CO2 trapping for geologic storage[J]. Environmental Science and Technology，2015，49(17)：10 265-10 284.
[5]	SNÆBJÖRNSDÓTTIR S Ó，SIGFÚSSON B，MARIENI C，et al. Carbon dioxide storage through mineral carbonation[J]. Nature Reviews Earth and Environment，2020，1(2)：90-102.
[6]	陈锋，姚荣. 二氧化碳捕获与封存技术[J]. 能源研究与信息，2011，27(04)：193-196.(CHEN Feng，YAO Rong. Carbon-dioxide capture and storage technologies[J]. Energy Research and Information，2011，27(4)：193-196.(in Chinese))
[7]	MOSLEH M H，SEDIGHI M，VARDON P J，et al. Efficiency of carbon dioxide storage and enhanced methane recovery in a high rank coal[J]. Energy and Fuels，2017，31(12)：13 892-13 900.
[8]	桑树勋. 二氧化碳地质存储与煤层气强化开发有效性研究述评[J].煤田地质与勘探，2018，46(5)：1-9.(SANG Shuxun. Research review on technical effectiveness of CO2 geological storage and enhanced coalbed methane recovery[J]. Coal Geology and Exploration，2018，46(5)：1-9.(in Chinese))
[9]	BACHU S. Screening and ranking of sedimentary basins for sequestration of CO2 in geological media in response to climate change[J]. Environmental Geology，2003，44(3)：277-289.
[10]	RANATHUNGA A S，PERERA M S A，RANJITH P G. Deep coal seams as a greener energy source：a review[J]. Journal of Geophysics and Engineering，2014，11(6)：063001.
[11]	LIU C J，SANG S X，ZHANG K，et al. Effects of temperature and pressure on pore morphology of different rank coals：Implications for CO2 geological storage[J]. Journal of CO2 Utilization，2019，34：343-352.
[12]	撒占友，吴静波，陆卫东，等. 注二氧化碳强化煤层气开采研究进展[J]. 煤矿安全，2022，53(10)：32-43.(SA Zhanyou，WU Jingbo，LU Weidong，et al. Research progress of enhanced coal bed methane exploitation by carbon dioxide injection[J]. Safety in Coal Mines，2022，53(10)：32-43.(in Chinese))
[13]	CAI C，KANG Y，WANG X C，et al. Mechanism of supercritical carbon dioxide(SC-CO2) hydro-jet fracturing[J]. Journal of CO2 Utilization，2018，26：575-587.
[14]	GIBBS J W. On the equilibrium of heterogeneous substances[J]. American Journal of Science，1878，16(12)：441-458.
[15]	PERERA M，RANJITH P G，PETER M. Effects of saturation medium and pressure on strength parameters of Latrobe Valley brown coal：Carbon dioxide，water and nitrogen saturations[J]. Energy，2011，36(12)：6 941-6 947.
[16]	VIETE D R，RANJITH P G. The effect of CO2 on the geomechanical and permeability behaviour of brown coal：Implications for coal seam CO2 sequestration[J]. International Journal of Coal Geology，2006，66(3)：204-216.
[17]	SAMPATH K，SIN I，PERERA M，et al. Effect of supercritical-CO2 interaction time on the alterations in coal pore structure[J]. Journal of Natural Gas Science and Engineering，2020，76：103214.
[18]	王恬，桑树勋，刘世奇，等. ScCO2-H2O作用下不同煤级煤化学结构变化的实验研究[J]. 煤田地质与勘探，2018，46(5)：60-65. (WANG Tian，SANG Shuxun，LIU Shiqi，et al. Experiment study on the chemical structure changes of different rank coals under action of supercritical carbon dioxide and water[J]. Coal Geology and Exploration，2018，46(5)：60-65.(in Chinese))
[19]	ZHANG G L，RANJITH P G，WU B S，et al. Synchrotron X-ray tomographic characterization of microstructural evolution in coal due to supercritical CO2 injection at in-situ conditions[J]. Fuel，2019，255(Nov.1)：115696.1-115696.8.
[20]	PERERA M，RANJITH P G，VIETE D R. Effects of gaseous and super-critical carbon dioxide saturation on the mechanical properties of bituminous coal from the Southern Sydney Basin[J]. Applied Energy，2013，110(Oct.)：73-81.
[21]	唐巨鹏，潘一山，李成全，等. 固流耦合作用下煤层气解吸-渗流实验研究[J]. 中国矿业大学学报，2006，35(2)：274-278.(TANG Jupeng，PAN Yishan，LI Chengquan，et al. Experimental study of desorption and seepage of coalbed methane under solid-fluid coupling[J]. Journal of China University of Mining and Technology，2006，35(2)：274-278.(in Chinese))
[22]	蔡美峰. 岩石力学与工程[M]. 2版. 北京：科学出版社，2013：58-59.(CAI Meifeng. Rock mechanics and engineering[M]. 2nd ed. Beijing：Science Press，2013：58-59.(in Chinese))
[23]	李颖，马寒松，李海涛，等. 超临界CO2对碳酸盐岩储层的溶蚀作用研究[J]. 油气藏评价与开发，2023，13(3)：288-295.(LI Ying，MA Hansonng，LI Haitao，et al. Dissolution of supercritical CO2 on carbonate reservoirs[J]. Petroleum Reservoir Evaluation And Development，2023，13(3)：288-295.(in Chinese))
[24]	肖畅，王开，张小强，等. 超临界CO2作用后无烟煤力学损伤演化特性及机制[J]. 煤炭学报，2022，47(6)：2 341-2 351.(XIAO Chang，WANG Kai，ZHANG Xiaoqiang，et al. Mechanical damage evolution characteristics and mechanism of anthracite treated with supercritical CO2[J]. Journal of China Coal Society，2022，47(6)：2 341-2 351.(in Chinese))
[25]	邓华锋，肖志勇，李建林，等. 水岩作用下损伤砂岩强度劣化规律试验研究[J]. 岩石力学与工程学报，2015，34(增1)：2 690-2 698. (DENG Huafeng，XIAO Zhiyong，LI Jianlin，et al. Deteriorating change rule test research of damage sandstone strength under water-rock interaction[J]. Chinese Journal of Rock Mechanics and Engineering，2015，34(Supp.1)：2 690-2 698.(in Chinese))
[26]	于志超，杨思玉，刘立，等. 饱和CO2地层水驱过程中的水-岩相互作用实验[J]. 石油学报，2012，33(6)：1 032-1 042.(YU Zhichao，YANG Siyu，LIU Li，et al. An experimental study on water-rock interaction during water flooding in formations saturated with CO2[J]. Acta Petrolei Sinica，2012，33(6)：1 032-1 042.(in Chinese))
[27]	曹冲，张京伦，朱鸿昊，等. CO2-岩石-地层水相互作用实验[J]. 成都工业学院学报，2016，19(4)：3-8.(CAO Chong，ZHANG Jinglun，ZHU Honghao，et.al. Experimental research on the interaction process between CO2-saturated rocks and formation water[J]. Journal Of Chengdu Technological University，2016，19(4)：3-8.(in Chinese))
[28]	MASOUDIAN M S，AIREY D W，EL-ZEIN A. Experimental investigations on the effect of CO2 on mechanics of coal[J]. International Journal of Coal Geology，2014，128-129：12-23.
[29]	LU Y Y，CHEN X Y，TANG J R，et al. Relationship between pore structure and mechanical properties of shale on supercritical carbon dioxide saturation[J]. Energy，2019，172：270-285.