传导加热下花岗岩中热冲击因子试验测定与演变规律分析

doi:10.13722/j.cnki.jrme.2020.0101

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (4860 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要岩石热破坏过程中，传热、细观破裂、宏观力学3个因素密切相关，热冲击因子是能够定量表征热对岩石破坏强度的重要物理量，基于热冲击因子可计算获得岩石内某一时刻的动态热应力，进而确定热破坏的具体时刻和热破坏程度。为了研究获得热传递过程中热冲击因子的演变规律，对传导加热下花岗岩内温度场、温度梯度、热冲击因子进行试验测定，研究结果表明：(1) 花岗岩在恒定热源传导加热下经历快速升温、缓慢升温、温度相对稳定3个阶段；(2) 温度梯度在升温阶段变化较大，温度梯度与热源温度和时间密切相关，单位时间内温度梯度的变化率不同；(3) 花岗岩体内热冲击因子具有分布非均质性和无规律性，对岩体结构变化的敏感性，以及传导加热过程中波峰动态移动性；(4) 循环加热造成花岗岩体破坏的实质在于矿物颗粒在动态热应力的频繁作用下发生分离，裂隙逐渐萌生、扩展、延伸，形成裂缝贯通岩体，导致岩体热破坏。热冲击因子演变规律的试验测定与研究，以及基于热冲击因子的动态热应力计算和岩石热破坏判别准则，可促进岩石热破坏理论的进一步发展。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	郤保平1
	2
	何水鑫1
	成泽鹏1
	李晓雪1
	董赟盛1
	杨欣欣1
	辛国旭1

关键词 ：岩石力学, 热破坏理论, 热冲击因子, 试验测定, 演变规律

Abstract：Heat transfer，meso-fracture and macro-mechanical properties are closely related to each other during the thermal damage of rocks. Thermal shock factor is an important physical quantity that can quantitatively characterize the strength of thermal damage to rocks，based on which the dynamic thermal stress in rock at a certain moment can be calculated to determine the time and degree of thermal damage. In order to study the evolution of the thermal shock factor during the heat transfer process，the temperature field，temperature gradient and thermal shock factor in granite under conductive heating were experimentally determined. The results show that granite undergoes three stages of rapid temperature increase，slow temperature increase and relatively stable temperature under constant heat source conduction heating，that the temperature gradient closely related to the temperature of the heat source and time changes greatly during the heating stage and the changing rate of the temperature gradient per unit time is different，and that the thermal shock factor in granite is heterogeneous and irregular in distribution and sensitive to rock mass structure and the peak of the thermal shock factor in the conduction heating process is dynamically mobile. The essence of the granite damage caused by cyclic heating is that mineral particles are separated under the dynamic thermal stress and cracks gradually present，expand and penetrate through the rock mass. The experimental determination of the thermal shock factor and the study of its evolution law，as well as the calculation of the dynamic thermal stress and the criterion of rock thermal damage based on the thermal shock factor，can promote the development of rock thermal damage theory.

Key words： rock mechanics thermal failure theory thermal shock factor test measurement evolution law

引用本文:

郤保平1，2，何水鑫1，成泽鹏1，李晓雪1，董赟盛1，杨欣欣1，辛国旭1. 传导加热下花岗岩中热冲击因子试验测定与演变规律分析[J]. 岩石力学与工程学报, 2020, 39(7): 1356-1368.
XI Baoping1，2，HE Shuixin1，CHENG Zepeng1，LI Xiaoxue1，DONG Yunsheng1，YANG Xinxin1，XIN Guoxu1. Thermal shock factor measurement and its evolution in granite under conduction heating. , 2020, 39(7): 1356-1368.

链接本文:

http://rockmech.whrsm.ac.cn/CN/10.13722/j.cnki.jrme.2020.0101 或 http://rockmech.whrsm.ac.cn/CN/Y2020/V39/I7/1356

[7]	SUN H，SUN Q，DENG W N，et al. Temperature effect on micro-structure and P-wave propagation in Linyi sandstone[J]. Applied Thermal Engineering，2017，115(3)：913-922.
[9]	郤保平，吴阳春，赵阳升. 热冲击作用下花岗岩宏观力学参数与热冲击速度相关规律试验研究[J]. 岩石力学与工程学报，2019，38(11)：2 194-2 207.(XI Baoping，WU Yangchun，ZHAO Yangsheng. Experimental study on the relationship between macroscopic mechanical parameters of granite and thermal shock velocity under thermal shock[J]. Chinese Journal of Rock Mechanics and Engineering，2019，38(11)：2 194-2 207.(in Chinese))
[5]	KUMARI W G P，RANJITH P G，PERERA M S A. Experimental investigation of quenching effect on mechanical，micro-structural and flow characteristics of reservoir rocks：Thermal stimulation method for geothermal energy extraction[J]. Journal of Petroleum Science and Engineering，2018，162(3)：419-433.
[15]	NORTON F H. The mechanism of spalling[J]. Journal of the American Ceramic Society，1926，1：29-39.
[17]	DWIVEDI R D，GOEL R K，PRASAD V V R，et al. Thermo-mechanical properties of Indian and other granites[J]. International Journal of Rock Mechanics and Mining Sciences，2008，45：303-315.
[19]	SHAO S，WASANTHA P L P，RANJITH P G，et al. Effect of cooling rate on the mechanical behavior of heated Strathbogie granite with different grain sizes[J]. International Journal of Rock Mechanics and Mining Sciences，2014，70(9)：381-387.
[1]	ZHAO Y S，FENG Z J，ZHAO Y，et al. Experimental investigation on thermal cracking，permeability under HTHP and application for geothermal mining of HDR[J]. Energy，2017，132(8)：305-314.
[11]	林睦曾. 岩石热物理学及其工程应用[M]. 重庆：重庆大学出版社，1991：128-133.(LIN Muzeng. Thermal physics of rock and its application[M]. Chongqing：Chongqing University Press，1991：128-133.(in Chinese))
[21]	郤保平，吴阳春，成泽鹏，等. 一种岩石热冲击破裂过程中热冲击因子的测定方法[P]. 中国：201811439431.2，2019.(XI Baoping，WU Yangchun，CHENG Zepeng，et al. A test measurement method for thermal shock factor during rock thermal shock fracturing[P]. China：201811439431.2，2019.(in Chinese))
[3]	GAUTAM P K，VERMA A K，JHA M K，et al. Effect of high temperature on physical and mechanical properties of granite[J]. Journal of Applied Geophysics，2018，159(12)：460-474.
[13]	WINKLEMAN A，SCHOTT O. Ueber thermische widerstaas- scoefficienten verschnieder glaser in iherer Abhangigkei von der chemischen zusammensetzung[J]. Annalen Der Physik，1894，51：1 893-1 894.
[8]	TANG S B，ZHANG H，TANG C A，et al. Numerical model for the cracking behavior of heterogeneous brittle solids subjected to thermal shock[J]. International Journal of Solids and Structures，2016，80(2)：520-531.
[18]	吴晓东，刘均荣. 岩石热开裂影响因素分析[J]. 石油钻探技术，2003，23(10)：24-27.(WU Xiaodong，LIU Junrong. Factors on the thermal cracking of rocks[J]. Petroleum drilling techniques，2003，23(10)：24-27.(in Chinese))
[2]	FAN L F，GAO J W，WU Z J，et al . An investigation of thermal effects on micro-properties of granite by X-ray CT technique[J]. Applied Thermal Engineering，2018，140(7)：505-519.
[4]	GE Z L，SUN Q. Acoustic emission (AE) characteristics of granite after heating and cooling cycles[J]. Engineering Fracture Mechanics，2018，200(9)：418-429.
[6]	CHEN S W，YANG C H. Evolution of thermal damage and permeability of Beishan granite[J]. Applied Thermal Engineering，2017，110(1)：1 533-1 542.
[10]	郤保平，吴阳春，赵阳升，等. 不同冷却模式下花岗岩强度对比与热破坏能力表征试验研究[J]. 岩石力学与工程学报，2020，39(2)：286-300.(XI Baoping，WU Yangchun，ZHAO Yangsheng，et al. Experimental investigations of compressive strength and thermal damage capacity characterization of granite under different cooling modes[J]. Chinese Journal of Rock Mechanics and Engineering，2020，39(2)：286-300.(in Chinese))
[12]	赵阳升，万志军，康建荣. 高温岩体地热开发导论[M]. 北京：科学出版社，2004：68-106.(ZHAO Yangsheng，WAN Zhijun，KANG Jianrong. An introduction to hot dry rock(HDR) geothermal exploitation[M]. Beijing：Science Press，2004：68-106.(in Chinese))
[14]	LIDMAN W G，BOBROWSKY A R. Correlation of physical properties of ceramic materials with resistance to fracture by thermal shock[C]// Proceedings of the National Advisory Committee for Aeronautics，NACA research memorandum and Lewis Flight Propulsion Laboratory. Washington D C：National Advisory Committee for Aeronautics，1949：1-15.
[16]	唐世斌，罗江，唐春安. 低温诱发岩石破裂的理论与数值模拟研究[J]. 岩石力学与工程学报，2018，37(7)：1 596-1 607.(TANG Shibin，LUO Jiang，TANG Chun'an. Theoretical and numerical study on the cryogenic fracturing in rock[J]. Chinese Journal of Rock Mechanics and Engineering，2018，37(7)：1 596-1 607.(in Chinese))
[20]	杨世铭，陶文栓. 传热学[M]. 北京：高等教育出版社，2006：41-46.(YANG Shiming，TAO Wenshuan. Heat transfer[M]. Beijing：Higher Education Press，2006：41-46.(in Chinese))