动静加载下煤的破坏特性及机制的试验研究

Abstract
Figure/Table
References (23)
Related Citation (15)

Download: PDF (561 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Failure characteristics and mechanism of coal are the foundation of studying mechanism of rockburst under impact disturbance，which is investigated by the improved split Hopkinson pressure bar(SHPB) in the laboratory. First，based on the regression analysis of experimental data，there are the unique failure characteristics of coal，as fracture half-hard brittle rock，under coupled static and dynamic loads. Then，though the discussion of experimental result，the failure mechanism is analyzed. It is found that the main reason of the unique failure characteristics is the existence of much crack. Main failure mode is brittle expansion of fracture；the dynamic loading leads to crack propagation until to destruction，meanwhile，the static loading mainly changes the number of existing fractures and the size of the elastic energy in the fissures tip. At last，based on the result of the experiment，the rockburst hazad of coal under coupled static and dynamic loads is discussed. We know that there are the critical static loading and the optimal dynamic loading under coupled static and dynamic loads. The strength under the static and dynamic loads of the coal，as a dynamic load resistance index，can reflect the capacity of the resistance to dynamic loads. Fractal dimension，as a dynamic loading energy index，can be used to measure the intensity of dynamic loads damage.

Key words： rock mechanics rockburst under impact disturbance static and dynamic loading failure characteristics crack fractal dimension release rate of elastic energy

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	LIU Shaohong1
	2
	LI Fengming3
	LAN Hang1
	2
	PAN Junfeng1
	2
	DU Taotao1
	2

Cite this article:

LIU Shaohong1,2,LI Fengming3, et al. EXPERIMENTAL STUDY OF FAILURE CHARACTERISTICS AND MECHANISM OF COAL UNDER COUPLED STATIC AND DYNAMIC LOADS[J]. , 2013, 32(s2): 3749-3759.

URL:

https://rockmech.whrsm.ac.cn/EN/Y2013/V32/Is2/3749

[1] 章梦涛. 冲击地压失稳理论与数值模拟计算[J]. 岩石力学与工程学报，1987，6(3)：197–204.(ZHANG Mengtao. Instability theory and mathematical model for coal/rock bursts[J]. Chinese Journal of Rock Mechanics and Engineering，1987，6(3)：197–204.(in Chinese))

[2] 王来贵，黄润秋，张悼元，等. 超前强扰诱发岩石力学系统失稳及其防灾的意义探讨[J]. 自然灾害学报，1997，6(2)：55–59.(WANG Laigui，HUANG Runqiu，ZHANG Zhuoyuan，et al. Inducing failure of rock mechanics system by advanced great disturbance and it significance for hazard prevention[J]. Journal of Natural Disasters，1997，6(2)：55–59.(in Chinese))

[3] 王来贵，刘向峰，马少鹏. 岩石试件非稳定破坏演化过程分析[C]// 第六次全国岩石力学与工程学术大会论文集. 武汉：[s.n.]，2000：10.(WANG Laigui，LIU Xiangfeng，MA Shaopeng. Analysis of unstable failure process of rock sample[C]// Proceedings of the Sixth National Rock Mechanics and Engineering Academic Conference. Wuhan：[s.n.]，2000：10.(in Chinese))

[4] 姜耀东，赵毅鑫，宋彦琦，等. 放炮震动诱发煤矿巷道动力失稳机制分析[J]. 岩石力学与工程学报，2005，24(17)：3 131–3 136.(JIANG Yaodong，ZHAO Yixin，SONG Yanqi，et al. Analysis of blasting tremor impact on roadway stability in coal mining[J]. Chinese Journal of Rock Mechanics and Engineering，2005，24(17)：3 131–3 136.(in Chinese))

[5] 齐庆新，史元伟，刘天泉，等. 冲击地压粘滑失稳机制的试验研究[J]. 煤炭学报，1997，22(2)：144–148.(QI Qingxin，SHI Yuanwei，LIU Tianquan，et al. Mechanism of instability caused by viscous sliding in rock burst[J]. Journal of China coal society，1997，22(2)：144–148.(in Chinese))

[6] 潘俊锋，宁宇，毛德兵，等. 煤矿开采冲击地压启动理论[J]. 岩石力学与工程学报，2012，31(3)：586–596.(PAN Junfeng，NING Yu，MAO Debing et al. Theory of rockburst start-up during coal mining[J]. Chinese Journal of Rock Mechanics and Engineering，2012，31(3)：586–596.(in Chinese))

[7] 李夕兵，周子龙，叶州元，等. 岩石动静组合加载力学特性研究[J]. 岩石力学与工程学报，2008，27(7)：1 387–1 395.(LI Xibing，ZHOU Zilong，YE Zhouyuan，et al. Study of rock mechanical characteristics under coupled static and dynamic loads[J]. Chinese Journal of Rock Mechanics and Engineering，2008，27(7)：1 387–1 395.(in Chinese))

[8] 王其胜，万国香，李夕兵，等. 动静组合加载下岩石破坏的声发射试验[J]. 爆炸与冲击，2010，30(3)：247–253.(WANG Qisheng，WAN Guoxiang，LI Xibing，et al. Acoustic emission experiment of rock failure under coupled static-dynamic load[J]. Explosion and Shock Waves，2010，30(3)：247–253.(in Chinese))

[9] 宫凤强，李夕兵，刘希灵. 三轴SHPB加载下砂岩力学特性及破坏模式试验研究[J]. 振动与冲击，2012，31(8)：29–32.(GONG Fengqiang，LI Xibing，LIU Xiling. Tests for sandstone mechanical properties and failure model under triaxial SHPB loading[J]. Journal of Vibration and Shock，2012，31(8)：29–32.(in Chinese))

[10] 张晓春，杨挺青，缪协兴. 岩石裂纹演化及其力学特性的研究进展[J]. 力学进展，1999，29(1)：97–104.(ZHANG Xiaochun，YANG Tingqing，MIAO Xiexing. The new advances of cracks development and mechanical properties of rock[J]. Advances in Mechanics，1999，29(1)：97–104.(in Chinese))

[11] 凌建明，孙钧. 脆性岩石的细观裂纹损伤及其时效特征[J]. 岩石力学与工程学报，1993，12(4)：304–312.(LING Jianming，SUN Jun. On messcrack damage of brittle rocks and its time-dependent characteristics[J]. Chinese Journal of Rock Mechanics and Engineering，1993，12(4)：304–312.(in Chinese))

[12] 白以龙，柯孚久，夏蒙棼. 固体中微裂纹系统统计演化的基本描述[J]. 力学学报，1991，23(3)：290–297.(BAI Yilong，KE Fujiu，XIA Mengfen. Formulation of statistical evolution of microcracks in solids[J]. Acta Mechanica Sinica，1991，23(3)：290–297.(in Chinese))

[13] KULATILAKE P H，BALASINGAM P，PARK J R，et al. Natural rock joint roughness quantification trough fractal techniques[J]. Geotechnical and Geological Engineering，2006，24(5)：1 181–1 202.

[14] HANSEN J P，SKJELTORP A T. Fractal pore space and rock permeability implications[J]. Physical Review B，1988，38(4)：2 635– 2 638.

[15] 高峰，谢和平，赵鹏. 岩石块度分布的分形性质及细观结构效应[J]. 岩石力学与工程学报，1994，13(3)：240–246.(GAO Feng，XIE Heping，ZHAO Peng. Fractal properties of size frequency distribution of rock fragments and the influence of meso-structure[J]. Chinese Journal of Rock Mechanics and Engineering，1994，13(3)：240–246.(in Chinese))

[16] MATUSUI G. Laboratory simulation of planetesimal collision[J]. Journal of Geophysical Research，1952，87(9)：968–982.

[17] YIN Z Q，LI X B，JIN J F，et al. Failure characteristics of high stress rock induced by la disturbance under confining pressure unloading[J]. Transactions of Nonferrous Metals Society of China，2012，22(1)：175–184.

[18] 蔡美峰. 岩石力学与工程[M]. 北京：煤炭工业出版社，2006：10.(CAI Meifeng. Rock mechanics and engineering[M]. Beijing：Chain Coal Industry Publishing House，2006：10.(in Chinese))

[19] 王其胜，李夕兵. 动静组合加载作用下花岗岩破碎的分形特征[J]. 实验力学，2009，24(6)：587–591.(WANG Qisheng，LI Xibing. Fractal property of granite failure under coupled static-dynamic load[J]. Journal of Experimental Mechanics，2009，24(6)：587–591.(in Chinese))

[20] 齐庆新，窦林名. 冲击地压理论与技术[M]. 北京：中国矿业大学出版社，2008：32–38.(QI Qingxin，DOU Linming. Theory and technology of rockburst[M]. Xuzhou：China University of Mining and Technology Press，2008：32–38.(in Chinese))

[21] 杨善元. 岩石爆破动力学基础[M]. 北京：煤炭工业出版社，1993：4.(YANG Shanyuan. Rock blasting dynamic basis[M]. Beijing：China Coal Industry Publishing House，1993：4.(in Chinese))

[22] KOZHUSHKO A A，SINANI A B. Loading rate and brittleness of solids[J]. Solid Phys，2005，47(5)：812–815.

[23] KIPP M E，GRADY D E，CHEN E P. Strain-rate dependent fracture initiation[J]. International Journal of Fracture，1980，16(3)：471–478.