不同温度作用下砂岩微观结构变化与演化规律实验研究

doi:10.13722/j.cnki.jrme.2023.0681

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摘要深部煤层的高地应力以及地下气化过程中产生的高温热应力的共同作用会对岩石造成损伤，破坏煤层围岩的稳定性。采用扫描电子显微镜、X射线衍射、CT扫描等实验手段对砂岩试样不同温度(25 ℃，200 ℃，400 ℃，600 ℃，800 ℃，1 000 ℃)下微观结构及矿物成分变化情况进行研究。结果表明：温度变化对砂岩的微细观结构具有重要影响。砂岩的孔隙率整体上随温度的升高而增大，1 000 ℃的砂岩孔隙率最大，25 ℃的砂岩孔隙率最小。砂岩不同孔径的孔隙数量总体上随温度的升高而减少，但1 000 ℃砂岩的微孔数量最多，25 ℃砂岩其他孔径的孔隙数量最多。加热后砂岩开始产生微裂纹，当温度超过600 ℃时，试件产生的微裂纹的数量明显增加，微裂纹长度、宽度及密度随着温度的升高进一步扩展。试件的矿物成分衍射强度及矿物的含量随温度的变化各不相同，超过600 ℃时各类矿物成分衍射强度变化发生转折，超过400 ℃时，砂岩内部矿物成分发生物理化学反应，晶体之间发生转化，随温度的升高，石英矿物含量逐渐增加，长石矿物逐渐减少；试件表观形态变化的临界温度为400 ℃。

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	王刚1
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	郑金叶2
	刘义鑫1
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	辛林1
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关键词 ：岩石力学, 砂岩, 热损伤, 微细观结构, 矿物成分, 孔隙结构

Abstract：The combination of high ground stress in deep coal seams and high temperature thermal stress in underground gasification will cause rock damage and destroy the stability of the coal seam surrounding the rock. This research investigated the relationship between temperature(25 ℃，200 ℃，400 ℃，600 ℃，800 ℃，and 1 000 ℃) with the microstructure and mineral composition of sandstone through the application of scanning electron microscopy，X-ray diffraction，and CT scanning. The results suggests that the temperature has a significant impact on sandstone microstructure because an increase in the temperature can improve the total porosity. The porosity of sandstone at 1 000 ℃ is the maximum and the minimum at 25 ℃. The number of pores of different sizes decreases with the increase in the temperature. However，the number of tiny pores at 1 000 ℃ is the most，and the number of pores at other sizes at 25 ℃ is the most. After heating，the sandstone begins to produce microcracks. When the temperature exceeds 600 ℃，the number of microcracks increases significantly，and the length，width and density of microcracks further expand with the increase in the temperature. The diffraction intensity and mineral composition of the sandstone vary with the temperature. When the temperature is higher than 600 ℃，the diffraction intensity of various mineral compositions takes a turning point. When the temperature exceeds 400 ℃，a physical and chemical reaction occurs in the mineral composition of sandstone，and a transformation occurs between crystals. With the increase in temperature，the quartz mineral content gradually increases，and the feldspar mineral gradually decreases. The critical temperature of the specimen?s apparent morphology change was 400 ℃.

Key words： rock mechanics sandstone thermal damage microscopic structure mineral composition pore structure

引用本文:

王刚1，2，郑金叶2，刘义鑫1，2，辛林1，2. 不同温度作用下砂岩微观结构变化与演化规律实验研究[J]. 岩石力学与工程学报, 2024, 43(3): 600-610.
WANG Gang1，2，ZHENG Jinye2，LIU Yixin1，2，XIN Lin1，2. Experimental study on the microstructure change and evolution law of sandstone under different temperatures. , 2024, 43(3): 600-610.

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http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2023.0681 或 http://rockmech.whrsm.ac.cn/CN/Y2024/V43/I3/600

[28]	DONG Z，CHEN Y P，WANG X G，et al. Evaluation of thermophysical and mechanical properties of sandstone due to high-temperature[J]. Materials，2022，15：8 692.
[9]	赵怡晴，吴常贵，金爱兵，等. 热处理砂岩微观结构及力学性质试验研究[J]. 岩土力学，2020，41(7)：2 233-2 240.(ZHAO Yiqing，WU Changgui，JIN Aibing，et al. Experimental study on the microstructure and mechanical properties of heat-treated sandstone[J]. Rock and Soil Mechanics，2020，41(7)：2 233-2 240.(in Chinese))
[18]	明杏芬，明晓东. 高温条件砂岩力学性能与热损伤特性试验研究[J].矿业研究与开发，2017，37(7)：57-60.(MING Xingfen，MING Xiaodong. Experimental study on mechanical properties and thermal damage characteristics of sandstone under high-temperature environment[J]. Mining Research and Development，2017，37(7)：57-60.(in Chinese))
[20]	张毅，李皋，王希勇，等. 川西须家河组致密砂岩高温后微组构特征及对力学性能的影响[J]. 岩石力学与工程学报，2021，40(11)：2 249-2 259.(ZHANG Yi，LI Gao，WANG Xiyong，et al. Microfabric characteristics of tight sandstone of Xujiahe formation in western Sichuan after high temperature and the effect on mechanical properties[J]. Chinese Journal of Rock Mechanics and Engineering，2021，40(11)：2 249-2 259.(in Chinese))
[22]	戎虎仁，白海波，王占盛. 不同温度后红砂岩力学性质及微观结构变化规律试验研究[J]. 岩土力学，2015，36(2)：463-469.(RONG Huren，BAI Haibo，WANG Zhansheng. Experimental research on mechanical properties and microstructure change law of red sandstone after different temperatures[J]. Rock and Soil Mechanics，2015，36(2)：463-469.(in Chinese))
[27]	李皋，孟英峰，董兆雄，等. 砂岩储集层微波加热产生微裂缝的机制及意义[J]. 石油勘探与开发，2007，196(1)：93-97.(LI Gao，MENG Yingfeng，DONG Zhaoxiong，et al. Mechanisms and significance of microfractures generated by microwave heating in sandstone reservoirs[J]. Petroleum Exploration and Development，2007，196(1)：93-97.(in Chinese))
[1]	梁杰，王喆，梁鲲，等. 煤炭地下气化技术进展与工程科技[J]. 煤炭学报，2020，45(1)：393-402.(LIANG Jie，WANG Zhe，LIANG Kun，et al. Progress and technology of underground coal gasification[J]. Journal of China Coal Society，2020，45(1)：393-402.(in Chinese))
[3]	余力. 研究与开发煤炭地下气化技术[J]. 科技导报，1995，(2)：54-56.(YU Li. R&D of coal underground pneumatolysis[J]. Science and Technology Review，1995，(2)：54-56.(in Chinese))
[5]	MOSTAFA M S，AFIFY N，GABER A，et al. Investigation of thermal properties of some basalt samples in Egypt[J]. Journal of Thermal Analysis and Calorimetry，2004，75(1)：179-188.
[6]	YURI P A，PRIBNOW D F C，SASS J H. Characterization of rock thermal conductivity by high-resolution optical scanning[J]. Geothermics，1999，28(2)：253-276.
[8]	谌伦建，赵洪宝，顾海涛，等. 煤层顶板砂岩在高温下微观结构变化的研究[J]. 中国矿业大学学报，2005，34(4)：443-446.(CHEN Lunjian，ZHAO Hongbao，GU Haitao，et al. Study on microstoructure of coal roof sandstone under high temperature[J]. Journal of China University of Mining and Technology，2005，34(4)：443-446.(in Chinese))
[10]	LI X S，PENG J，XIE Y L，et al. Influence of high-temperature treatment on strength and failure behaviors of a quartz-rich sandstone under true triaxial condition[J]. Lithosphere，2022，(Supp.1)：3086647.
[12]	卢唯洛. 热处理砂岩的损伤特性及渗透性演化研究[硕士学位论文][D]. 重庆：重庆大学，2020.(LU Weiluo. Study on damage characteristics and permeability evolution of heat treated sandstone[M. S. Thesis][D]. Chongqing：Chongqing University，2020.(in Chinese))
[14]	任松，李凯鑫，张平. 动力扰动和高温联合作用下砂岩力学特性及破坏特征[J]. 中南大学学报：自然科学版，2023，54(3)：1 087-1 097.(REN Song，LI Kaixin，ZHANG Ping. Mechanical properties and failure characteristics of sandstone under combined effect of dynamic disturbance and high temperature[J]. Journal of Central South University：Science and Technology，2023，54(3)：1 087-1 097.(in Chinese))
[33]	梁永庆. 高温作用后砂岩力学性质实验研究[J]. 煤炭技术，2016，35(3)：76-78.(LIANG Yongqing. Research on mechanical properties of sandstone under high temperature effect[J]. Coal Technology，2016，35(3)：76-78.(in Chinese))
[17]	吴刚，邢爱国，张磊. 砂岩高温后的力学特性[J]. 岩石力学与工程学报，2017，26(10)：2 110-2 116.(WU Gang，XING Aiguo，ZHANG Lei. Mechanical charactistics of sandstone after high temperatures[J]. Journal of Rock Mechanics and Engineering，2017，26(10)：2 110-2 116.(in Chinese))
[19]	SUN Q，LÜ C，CAO L W，et al. Thermal properties of sandstone after treatment at high temperature[J]. International Journal of Rock Mechanics and Mining Sciences，2016，85：60-66.
[21]	苏承东，韦四江，秦本东，等. 高温对细砂岩力学性质影响机制的试验研究[J]. 岩土力学，2017，38(3)：623-630.(SU Chengdong，WEI Xijiang，QIN Bendong，et al. Experimental study of influence mechanism of high temperature on mechanical properties of fine-grained sandstone[J]. Rock and Soil Mechanics，2017，38(3)：623-630.(in Chinese))
[24]	姜德义，郭朋煜，范金洋，等. 升温速率对高温作用后砂岩的宏细观性质影响[J]. 岩土力学，2022，43(10)：2 675-2 688.(JIANG Deyi，GUO Pengyu，FAN Jinyang，et al. Effect of heating rate on macro and mesoscopic properties of sandstone after high temperature[J]. Rock and Soil Mechanics，2022，43(10)：2 675-2 688.(in Chinese))
[25]	LIA M，WANG D，SHAO Z L. Experimental study on changes of pore structure and mechanical properties of sandstone after high-temperature treatment using nuclear magnetic resonance[J]. Engineering Geology，2020，275：107539.
[26]	吐洪江，韩国生，田野，等. 岩石热解热失重法计算砂岩储集层含油饱和度[J]. 录井工程，2013，24(3)：16-18.(TU Hongjiang，HAN Guosheng，TIAN Ye，et al. Calculate oil saturation of sandstone reservoir by thermal decomposition weightlessness method of rock pyrolysis[J]. Mud Logging Engineering，2013，24(3)：16-18.(in Chinese))
[30]	朱合华，闫治国，邓涛，等. 3种岩石高温后力学性质的试验研究[J]. 岩石力学与工程学报，2006，25(10)：1 945-1 950.(ZHU Hehua，YAN Zhiguo，DENG Tao，et al. Testing study on mechanical properties of tuff，granite and breccia after high temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(10)：1 945-1 950.(in Chinese))
[34]	于鑫，李皋，陈泽，等. 川西须家河组致密砂岩高温后的物理力学特征参数试验研究[J]. 地质力学学报，2021，27(1)：1-9. (YU Xin，LI Gao，CHEN Ze，et al. Experimental study on physical and mechanical characteristics of tight sandstones in the Xujiahe Formation in Western Sichuan after high-temperature exposure[J]. Journal of Geomechanics，2021，27(1)：1-9.(in Chinese))
[23]	刘秋卓，雷瑞德. 砂岩热损伤微观结构与宏观物理特性演化规律研究[J]. 隧道建设(中英文)，2019，39(1)：75-80.(LIU Qiuzhuo，LEI Ruide. Study of evolution characteristics of microstructure and macroscopic physical properties of sandstone thermal damage[J]. Tunnel Construction，2019，39(1)：75-80.(in Chinese))
[31]	王鹏，许金余，刘石，等. 热损伤砂岩力学与超声时频特性研究[J]. 岩石力学与工程学报，2014，33(9)：1 897-1 904.(WANG Peng，XU Jinyu，LIU Shi，et al. Mechanical properties and ultrasonic time-frequency characteristics of thermal damaged sandstone[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(9)：1 897-1 904.(in Chinese))
[32]	张胜寒，杨礼宁，冉琦，等. 高温作用后砂岩的声发射特性研究[J]. 工程地球物理学报，2022，19(3)：322-327.(ZHANG Shenghan，YANG Lining，RAN Qi，et al. The study on acoustic emission charastics of sandstone after high temperature[J]. Chinese Journal of Engineering Geophysics，2022，19(3)：322-327.(in Chinese))
[4]	OHMURA T，TSUBOI M，TOMIMURA T. Estimation of the mean thermal conductivity of anisotropic materials[J]. International Journal of Thermophysics，2002，23：843-853.
[7]	贺玉龙，杨立中，杨明. 岩体温度场与应力场耦合作用的一种量化方法[J]. 西南交通大学学报，2002，37(1)：10-13.(HE Yulong，YANG Lizhong，YANG Ming. A quantitative method for the coupling effect of temperature fields and stress fields in rock mass[J]. Journal of Southwest Jiaotong University，2002，37(1)：10-13.(in Chinese))
[13]	姚孟迪. 热损伤岩石力学特性及裂纹扩展试验研究[博士学位论文] [D]. 武汉：武汉大学，2017.(YAO Mengdi. Experimental study on mechanical properties and crack propagation of thermal damaged rock[Ph. D. Thesis][D]. Wuhan：Wuhan University，2017.(in Chinese))
[2]	王喆，梁杰，侯腾飞，等. 高温对煤炭地下气化围岩损伤的影响[J]. 煤炭学报，2022，47(6)：2 270-2 278.(WANG Zhe，LIANG Jie，HOU Tengfei，et al. Influence of high temperature on surrounding rock damage of underground coal gasification[J]. Journal of China Coal Society，2022，47(6)：2 270-2 278.(in Chinese))
[11]	YAVUZ H，DEMIRDAG S，CARAN S. Thermal effect on the physical properties of carbonate rocks[J]. International Journal of Rock Mechanics and Mining Sciences，2010，47：94-103.
[15]	左建平，谢和平，周宏伟. 温度压力耦合作用下的岩石屈服破坏研究[J]. 岩石力学与工程学报，2005，24(16)：2 917-2 921.(ZUO Jianping，XIE Heping，ZHOU Hongwei. Study of failure behavior of rock under coupling effects of temperature and confining pressure[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(16)：2 917-2 921.(in Chinese))
[16]	赵亚永，魏凯，周佳庆，等. 三类岩石热损伤力学特性的试验研究与细观力学分析[J]. 岩石力学与工程学报，2017，36(1)：142-151.(ZHAO Yayong，WEI Kai，ZHOU Jiaqing，et al. Laboratory study and micromechanical analysis of mechanical behaviors of three thermally damaged rocks[J]. Chinese Journal of Rock Mechanics and Engineering，2017，36(1)：142-151.(in Chinese))
[29]	李凌峰，雷瑞德. 热损伤砂岩力学特性与声发射试验研究[J]. 煤矿安全，2020，51(5)：72-77.(LI Lingfeng，LEI Ruide. Experimental study on mechanical properties and AE of thermally damaged sandstone[J]. Safety in Coal Mines，2020，51(5)：72-77.(in Chinese))