冲击荷载对煤岩内部微结构演化及表面新生裂隙分布规律的影响

doi:10.13722/j.cnki.jrme.2015.1541

摘要
图/表
参考文献
相关文章 (15)

全文: PDF (689 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要利用自制落锤式煤岩冲击加载试验装置，配合超声波检测设备，对型煤在不同冲击荷载作用下内部微结构及表面新生裂隙的发展演化规律进行系统的试验研究，并分析冲击荷载对型煤内部微结构演化产生影响的机制。结果表明：型煤内部微结构演化与冲击荷载作用次数、单次冲击能量大小、冲击能量施加顺序、冲击能量的累计效果等因素有关；型煤内部微结构的扩展和表面新生裂隙的出现、发展均表现出明显的各向异性，沿冲击荷载方向上比垂直冲击方向上变化显著；相同的冲击荷载作用下，型煤内部微结构总数量随着冲击次数的增加呈现出“高速增加→平缓发展→急速增加”的趋势；不同冲击荷载作用时，随着单次冲击能量的增加，型煤内部微结构总数量呈指数函数关系增大，型煤表面新生裂隙局部化分布特点更为显著；型煤内部微结构演化对冲击能量由大到小进行施加更为敏感；冲击荷载对型煤内部微结构影响的累计效果也呈非线性规律，表现为先增大后减小趋势，其不可简单等效为冲击能量的增加；型煤对冲击能量的吸收率随着单次冲击能量的增加呈减小趋势，表现为大于一定值的较小冲击能量的累计效果要大于等值单次较大冲击能量对型煤造成的影响。

	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
	赵洪宝1
	2
	王中伟1
	张欢1
	李伟1

关键词 ：岩石力学, 冲击荷载, 内部微结构, 表面裂隙, 超声波, 非线性

Abstract：The tests to study the development of internal micro-structure and the distribution of new surface fractures of coal samples under impact loads were performed with the drop hammer impact test equipment for coal and the ultrasonic detection device. The effect of dynamic loads on the development of internal structure of coal was analyzed. The results show that the development of the internal micro-structure of coal is related to the number of impacts，energy of a single impacting，sequence of impact energy，accumulative effect of impact energy，etc. Both the internal micro-structure and the newly developed surface fractures propagate anisotropically. The influence is larger along the impact direction than perpendicular to the direction. When the energy of a single impacting is constant，the total quantity of the internal micro-structure of coal has a trend of rapid increasing， gentle development and sharp increasing with increase of the impact number. The total quantity of internal micro-structure of coal increases exponentially as the energy of a single impacting increases，and the localized distribution of new developed surface fractures of coal is also more significant. The development of the internal micro-structure of coal is more sensitive under the decreasing cyclic loading than in increasing process. The accumulative effect of impact loads on the development of internal micro-structure is nonlinear，and shows a decreasing trend after the first increase. The accumulative effect of impact loads cannot be only simply considered due to the increasing of impact energy. The absorption rate of impact energy of coal decreases as the increase of the impact energy. The accumulative effect of the smaller single impact energy on internal micro-structure of coal is greater than the effect caused by the equivalent larger single impact energy.

Key words： rock mechanics impact load internal microstructure surface fractures ultrasonic wave nonlinear

引用本文:

赵洪宝1，2，王中伟1，张欢1，李伟1. 冲击荷载对煤岩内部微结构演化及表面新生裂隙分布规律的影响[J]. 岩石力学与工程学报, 2016, 35(5): 971-979.
ZHAO Hongbao1，2，WANG Zhongwei1，ZHANG Huan1，LI Wei1. Effects of dynamic loads on development of internal microstructure and distribution of new surface fractures of coal. , 2016, 35(5): 971-979.

链接本文:

http://www.rockmech.org/CN/10.13722/j.cnki.jrme.2015.1541 或 http://www.rockmech.org/CN/Y2016/V35/I5/971

[20]	蒋金宝，林英松，丁雁生. 利用爆炸技术改善低渗储层的实验研究[J]. 岩石力学与工程学报，2009，28(增1)：2 830-2 835. (JIANG Jinbao，LIN Yingsong，DING Yansheng. Experiment research on low permeability reservoir improved by explosion technology[J]. Chinese Journal of Rock Mechanics and Engineering，2009，28(Supp.1)：2 830-2 835.(in Chinese)) " target="_blank">
[7]	刘少虹，李凤明，蓝航，等. 动静加载下煤的破坏特性及机制的试验研究[J]. 岩石力学与工程学报，2013，32(增2)：3 749-3 759. (LIU Shaohong，LI Fengming，LAN Hang，et al. Experimental study of failure characteristics and mechanism of coal under coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2013，32 (Supp.2)：3 749-3 759.(in Chinese))
[8]	刘少虹，秦子晗，娄金福. 一维动静加载下组合煤岩动态破坏特性的试验分析[J]. 岩石力学与工程学报，2014，33(10)：2 064-2 075. (LIU Shaohong，QIN Zihan，LOU Jinfu. Experimental study of dynamic failure characteristics of coal-rock compound under one-dimensional static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2014，33(10)：2 064-2 075.(in Chinese))
[14]	赵洪宝，尹光志. 煤样初始内部结构对瓦斯流动特性的影响[J]. 重庆大学学报，2010，33(9)：74-78.(ZHAO Hongbao，YIN Guangzhi. The influence of initial-internal structure of coal sample on gas flow characteristic[J]. Journal of Chongqing University，2010，33(9)：74-78.(in Chinese))
[22]	王家臣，邵太升，赵洪宝. 瓦斯对突出煤力学特性影响试验研究[J]. 采矿与安全工程学报，2011，28(3)：391-394.(WANG Jiachen，SHAO Taisheng，ZHAO Hongbao. Experimental study of effect of gas on mechanical properties of outburst coal[J]. Journal of Mining and Safety Engineering，2011，28(3)：391-394.(in Chinese))
[9]	ZHAO Y，ZHAO G F，JIANG Y，et al. Effects of bedding on the dynamic indirect tensile strength of coal：laboratory experiments and numerical simulation[J]. International Journal of Coal Geology，2014，132(10)：81-93. " target="_blank">
[13]	葛修润，任建喜，蒲毅彬，等. 煤岩三轴细观损伤演化规律的CT动态试验[J]. 岩石力学与工程学报，1999，18(5)：497-502.(GE Xiurun，REN Jianxi，PU Yibin，et al. A real-time CT triaxial testing study off meso-damage evolution law of coal[J]. Chinese Journal of Rock Mechanics and Engineering，1999，18(5)：497-502.(in Chinese))
[18]	孟巧荣，赵阳升，于艳梅，等. 不同温度下褐煤裂隙演化的显微CT试验研究[J]. 岩石力学与工程学报，2010，29(12)：2 475-2 483. (MENG Qiaorong，ZHAO Yangsheng，YU Yanmei，et al. Micro-CT experimental study of crack evolution of lignite under different temperatures[J]. Chinese Journal of Rock Mechanics and Engineering，2010，29(12)：2 475-2 483.(in Chinese)) " target="_blank">
[4]	高文蛟，单仁亮. 无烟煤在冲击载荷下破坏模式与强度特性[J]. 煤炭学报，2012，37(增1)：13-18.(GAO Wenjiao，SHAN Renliang. Failure pattern and strength properties of anthracite under impact loading[J]. Journal of China Coal Society，2012，37(Supp.1)：13-18.(in Chinese))
[10]	赵毅鑫，肖汉，黄亚琼. 霍普金森杆冲击加载煤样巴西圆盘劈裂试验研究[J]. 煤炭学报，2014，39(2)：286-291.(ZHAO Yixin，XIAO Han，HUANG Yaqiong. Dynamic split tensile test of Brazilian disc of coal with split Hopkinson pressure bar loading[J]. Journal of China Coal Society，2014，39(2)：286-291.(in Chinese))
[21]	WALSH J B. The effect of cracks on the compressibility of rock[J]. Journal of Geophysical Research，1965，70(2)：381-389. " target="_blank">
[12]	付玉凯，解北京，王启飞. 煤的动态力学本构模型[J]. 煤炭学报，2013，38(10)：1 769-1 774.(FU Yukai，XIE Beijing，WANG Qifei. Dynamic test study of coal rock under different strain rates[J]. Journal of China Coal Society，2013，38(10)：1 769-1 774.(in Chinese))
[16]	许江，袁梅，李波波，等. 煤的变质程度、孔隙特征与渗透率关系的试验研究[J]. 岩石力学与工程学报，2012，31(4)：681-687.(XU Jiang，YUAN Mei，LI Bobo，et al. Experimental study on the relationship of metamorphic grade of coal，pore characteristics，and permeability[J]. Chinese Journal of Rock Mechanics and Engineering， 2012，31(4)：681-687.(in Chinese))
[19]	丁雁生，陈力，谢燮，等. 低渗透油气田“层内爆炸”增产技术研究[J]. 石油勘探与开发，2001，28(2)：90-96.(DING Yansheng，CHEN Li，XIE Xie，et al. On the stimulation with exploding in fracture in low permeability reservoir[J]. Petroleum Exploration and Development，2001，28(2)：90-96.(in Chinese)) " target="_blank">
[23]	高全臣，陆华，王东，等. 多孔隙流固耦合砂岩的冲击损伤效应[J]. 爆炸与冲击，2012，32(6)：629-634.(GAO Quanchen，LU Hua，WANG Dong，et al. Impact damage effect of porous sandstone coupling with fluid[J]. Explosion and Shock Waves，2012，32(6)：629-634.(in Chinese))
[24]	金解放，李夕兵，殷志强，等. 轴压和循环冲击次数对砂岩动态力学特性的影响[J]. 煤炭学报，2012，37(6)：923-930.(JIN Jiefang，LI Xibing，YIN Zhiqiang，et al. Effects of axial pressure and number of cyclic impacts on dynamic mechanical characteristics of sandstone[J]. Journal of China Coal Society，2012，37(6)：923-930.(in Chinese))
[11]	单仁亮，程瑞强，高文蛟. 云驾岭无烟煤的动态本构模型研究[J]. 岩石力学与工程学报，2006，25(11)：2 259-2 263.(SHAN Renliang，CHENG Ruiqiang，GAO Wenjiao. Study on dynamic constitutive model of anthracite of Yunjialing coal mine[J]. Chinese Journal of Rock Mechanics and Engineering，2006，25(11)：2 259-2 263.(in Chinese)) " target="_blank">
[15]	赵洪宝，李华华，杜秋浩，等. 含瓦斯煤样横向变形与瓦斯流动特性耦合关系试验研究[J]. 岩土力学，2013，34(12)：3 384-3 388. (ZHAO Hongbao，LI Huahua，DU Qiuhao，et al. Experimental study of coupling relationship between lateral strain of coal containing gas and characteristics of gas flow[J]. Rock and Soil Mechanics，2013，34(12)：3 384-3 388.(in Chinese))
[3]	KLEPACZKO J R，HSU T R，BASSIM M N. Elastic and pseudoviscous properties of coal under quasi-static and impact loadings[J]. Canadian Geotechnical Journal，1984，21(2)：203-212. " target="_blank">
[17]	YU Y，LIANG W，HU Y，et al. Study of micro-pores development in lean coal with temperature[J]. International Journal of Rock Mechanics and Mining Sciences，2012，51(4)：91-96. " target="_blank">
[2]	李夕兵. 岩石动力学基础与应用[M]. 北京：科学出版社，2014：176-192.(LI Xibing. Rock dynamics fundamentals and applications[M]. Beijing：Science Press，2014：176-192.(in Chinese)) " target="_blank">
[5]	高文蛟，单仁亮，苏永强. 无烟煤单轴冲击动态强度理论[J]. 爆炸与冲击，2013，33(3)：297-302.(GAO Wenjiao，SHAN Renliang，SU Yongqiang. Theoretical research on dynamic strength of anthracite under uniaxial impact[J]. Explosion and Shock Waves，2013，33(3)：297-302.(in Chinese))
[6]	刘晓辉，张茹，刘建锋. 不同应变率下煤岩冲击动力试验研究[J]. 煤炭学报，2012，37(9)：1 528-1 534.(LIU Xiaohui，ZHANG Ru，LIU Jianfeng. Dynamic test study of coal rock under different strain rates[J]. Journal of China Coal Society，2012，37(9)：1 528-1 534.(in Chinese))
[1]	ZHANG Q B，ZHAO J. A review of dynamic experimental techniques and mechanical behaviour of rock materials[J]. Rock Mechanics and Rock Engineering，2013，47(4)：1 411-1 478. " target="_blank">