煤–过渡层–岩组合体物理力学特征试验及数值模拟研究

doi:10.13722/j.cnki.jrme.2023.0334

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

Download: PDF (3940 KB) HTML (1 KB)
Export: BibTeX | EndNote (RIS)

Abstract Within deep coal-bearing strata，a prolonged diagenesis process leads to the existence of a lithological transition zone between some coal and rock layers. This transition zone，together with the adjacent rock and coal layers，constitutes a composite structure. To study the influence of the transition layer's height on the deterioration characteristics of the coal-rock composite，a proportionate design of coal，rock，and transition layer artificial materials，as well as a production plan for coal-transition layer-rock(CFR) composite specimens，were initially proposed. On this basis，uniaxial compression tests of artificial CFR composite specimens with varying transition layer heights were conducted. In addition，based on the discrete element numerical simulation software PFC，rigid clusters and spherical particles were used to represent coal and rock particles in the transition layer. Through their proportion changes，a PFC characterization model for the transition layer and CFR composite structure was constructed. Combined with the test results，the model parameters were calibrated，and the algorithm?s effectiveness was validated. Both experimental and numerical simulation results indicate that as the height of the transition layer increases，specimen strength，pre-peak dissipated energy，and acoustic emission b initially decrease then increase，while the elastic strain energy shows a progressively increasing trend. The distribution range of numerical simulation micro-fracture angles also initially narrows then expands with increasing height，and the micro-crack initiation area gradually shifts from the coal layer to the transition layer，with the acoustic emission location progressively concentrating on the interface between the coal and transition layer. These results demonstrate that the presence of the transition layer significantly alters the physical and mechanical properties of the coal-rock composite structure.

Key words： rock mechanics coal-transition layer-rock combination strength characteristics numerical simulation failure mechanism

	Service

	E-mail this article
	Add to my bookshelf
	Add to citation manager
	E-mail Alert
	RSS
	Articles by authors
	YAO Wenjie1
	2
	LIU Xuewei2
	LIU Bin2
	FAN Ying1
	ZHU Lei1
	2
	ZHENG Zhi3

Cite this article:

YAO Wenjie1,2,LIU Xuewei2, et al. Experimental and numerical simulation study on mechanical properties of coal-transition layer-rock composite structures[J]. , 2024, 43(1): 184-205.

URL:

https://rockmech.whrsm.ac.cn/EN/10.13722/j.cnki.jrme.2023.0334 OR https://rockmech.whrsm.ac.cn/EN/Y2024/V43/I1/184

[1]	左建平，谢和平，孟冰冰，等. 煤岩组合体分级加卸载特性的试验研究[J]. 岩土力学，2011，32(5)：1 287-1 296.(ZUO Jianping，XIE Heping，MENG Bingbing，et al. Experimental research on loading-unloading behavior of coal-rock combination bodies at different stress levels[J]. Rock and Soil Mechanics，2011，32(5)：1 287-1 296.(in Chinese))
[2]	左建平，陈岩，宋洪强，等. 煤岩组合体峰前轴向裂纹演化与非线性模型[J]. 岩土工程学报，2017，39(9)：1 609-1 615.(ZUO Jianping，CHEN Yan，SONG Hongqiang，et al. Evolution of pre-peak axial crack strain and nonlinear model for coal-rock combined body[J]. Chinese Journal of Geotechnical Engineering，2017，39(9)：1 609-1 615. (in Chinese))
[3]	陈光波，李谭，杨磊，等. 不同煤岩比例及组合方式的组合体力学特性及破坏机制[J]. 采矿与岩层控制工程学报，2021，3(2)：84-94.(CHEN Guangbo，LI Tan，YANG Lei，et al. Mechanical properties and failure mechanism of combined bodies with different coal-rock ratios and combinations[J]. Journal of Mining and Strata Control Engineering，2021，3(2)：84-94.(in Chinese))
[4]	郑建伟，王书文，李海涛，等. 层面数量对煤岩组合体抗压特性影响的实验研究[J]. 煤田地质与勘探，2023，51(5)：11-22.(ZHENG Jianwei，WANG Shuwen，LI Haitao，et al. Compressive strength characteristics of coal-rock combinations influenced by bedding planes number[J]. Coal Geology and Exploration，2023，51(5)：11-22.(in Chinese))
[5]	陈绍杰，李法鑫，尹大伟，等. 不同高比灰岩-煤组合体变形破坏特征实验研究[J]. 中南大学学报：自然科学版，2023，54(6)：2 459-2 472.(CHEN Shaojie，LI Faxin，YIN Dawei，et al. Experimental study on deformation failure characteristics of limestone-coal composite with different rock-coal height ratios[J]. Journal of Central South University：Natural Science，2023，54(6)：2 459-2 472.(in Chinese))
[6]	WANG T，MA Z，GONG P，et al. Analysis of failure characteristics and strength criterion of coal-rock combined body with different height ratios[J]. Advances in Civil Engineering，2020：8842206.
[7]	余伟健，潘豹，李可，等. 岩-煤-岩组合体力学特性及裂隙演化规律[J]. 煤炭学报，2022，47(3)：1 155-1 167.(YU Weijian，PAN Bao，LI Ke，et al. Mechanical properties and fracture evolution law of rock-coal-rock combination[J]. Journal of China Coal Society，2022，47(3)：1 155-1 167.(in Chinese))
[8]	BAI J，DOU L，MA?KOWSKI P，et al. Mechanical properties and damage behavior of rock-coal-rock combined samples under coupled static and dynamic loads[J]. Geofluids，2021：3181697.
[9]	LYU P F，CHEN X H，CHEN G B，et al. Experimental study on dynamic mechanical responses of coal specimens under the combined dynamic-static loading[J]. Arabian Journal of Geosciences，2020，13(18)：935.
[10]	YU Y，LIU J，YANG Y，et al. Failure energy evolution of coal-rock combination with different inclinations[J]. Scientific Reports，2022，12(1)：19455.
[11]	WEI Z，YANG K，HE X，et al. Mechanical characteristics and energy dissipation trends of coal-rock combination system samples with different inclination angles under uniaxial compression[J]. Geofluids，2021：7702751.
[12]	ZHANG H，LU C P，LIU B，et al. Numerical investigation on crack development and energy evolution of stressed coal-rock combination[J]. International Journal of Rock Mechanics and Mining Sciences，2020，133：104417.
[13]	赵宏林，赵越. 倾角对煤岩组合体力学及冲击倾向性影响的颗粒流分析[J]. 煤矿安全，2018，49(3)：198-201.(ZHAO Honglin，ZHAO Yue. Influence of dip angle of coal and rock combination on outburst tendency based on particle flow code[J]. Safety in Coal Mines，2018，49(3)：198-201.(in Chinese))
[14]	CHEN Y，ZUO J，LIU D，et al. Experimental and numerical study of coal-rock bimaterial composite bodies under triaxial compression[J]. International Journal of Coal Science and Technology，2021，8(5)：908-924.
[15]	ZHOU X，ZHANG D，LI Y，et al. Numerical simulation and theoretical analysis of coal-rock meso-mechanics on core discing[J]. Arabian Journal of Geosciences，2022，15(6)：1-15.
[16]	DU F，WANG K. Unstable failure of gas-bearing coal-rock combination bodies：insights from physical experiments and numerical simulations[J]. Process Safety and Environmental Protection，2019，129：264-279.
[17]	MA Q，TAN Y，LIU X，et al. Experimental and numerical simulation of loading rate effects on failure and strain energy characteristics of coal-rock composite samples[J]. Journal of Central South University，2021，28(10)：3 207-3 222.
[18]	GAO F，KANG H，YANG L. Experimental and numerical investigations on the failure processes and mechanisms of composite coal-rock specimens[J]. Scientific reports，2020，10(1)：13422.
[19]	樊玉峰，肖晓春，丁鑫，等. 岩煤接触面力学性质对组合煤岩力学行为影响机制研究[J]. 煤炭学报，2023，48(4)：1 487-1 501.(FAN Yufeng，XIAO Xiaochun，DING Xin，et al. Influence mechanism of contact surface mechanical properties on mechanical behavior of coal rock combination[J]. Journal of China Coal Society，2023，48(4)：1 487-1 501.(in Chinese))
[20]	YIN D W，CHEN S J，CHEN B，et al. Strength and failure characteristics of the rock-coal combined body with single joint in coal[J]. Geomechanics and Engineering，2018，15(5)：1 113-1 124.
[21]	储著发. 基于计算机视觉的隧道围岩结构及其变形失稳分析[硕士学位论文][D]. 徐州：中国矿业大学，2022.(CHU Zhufa Analysis of tunnel surrounding rock structure and deformation instability based on computer vision[M. S. Thesis][D]. Xuzhou：China University of Mining and Technology，2022.(in Chinese))
[22]	寇苗苗. 卸荷渗流耦合作用下裂隙岩体破坏机制研究[博士学位论文][D]. 重庆：重庆大学，2019.(KOU Miaomiao . Study on the failure mechanism of fractured rock masses under the coupled hydro-mechanical loading and unloading conditions[Ph. D. Thesis][D]. Chongqing：Chongqing University，2019.(in Chinese))
[23]	ZHANG L，LI X C，REN T. A theoretical and experimental study of stress-strain，creep and failure mechanisms of intact coal[J]. Rock Mechanics and Rock Engineering，2020，53：5 641-5 658.
[24]	LIU X，CHEN H，LIU B，et al. Experimental and numerical study on failure characteristics and mechanism of coal under different quasi-static loading rates[J]. Theoretical and Applied Fracture Mechanics，2022，121：103478
[25]	叶功勤，曹函，高强，等. 颗粒配比对岩石力学特征影响的数值模拟研究[J]. 地质力学学报，2019，25(6)：1 129-1 137.(YE Gongqin，CAO Han，GAO Qiang，et al. Numerical simulation study on the influence of particle proportion on rock mechanics characteristics[J]. Journal of Geomechanics，2019，25(6)：1 129-1 137.(in Chinese))
[26]	CHEN P. Effects of microparameters on macroparameters of flat-jointed bonded-particle materials and suggestions on trial-and-error method[J]. Geotechnical and Geological Engineering，2017，35：663-677.
[27]	HAZZARD J F，YOUNG R P，MAXWELL S C. Micromechanical modeling of cracking and failure in brittle rocks[J]. Journal of Geophysical Research：Solid Earth，2000，105(B7)：16 683-16 697.
[28]	胡训健，卞康，刘建，等. 离散裂隙网络对岩石力学性质和声发射特性影响的颗粒流分析[J]. 岩土力学，2022，43(增1)：542-552.(HU Xunjian，BIAN Kang，LIU Jian，et al. Particle flow code analysis of the effect of discrete fracture network on rock mechanical properties and acoustic emission characteristics[J]. Rock and Soil Mechanics，2022，43(Supp.1)：542-552.(in Chinese))
[29]	LOCKNER D. The role of acoustic emission in the study of rock fracture[J]. International Journal of Rock Mechanics and Mining Sciences and Geomechanics Abstracts，1993，30(7)：883-899.
[30]	曾正文，马瑾，刘力强，等. 岩石破裂扩展过程中的声发射b值动态特征及意义[J]. 地震地质，1995，(1)：7-12.(ZENG Zhengwen，MA Jin，LIU Liqiang，et al. Dynamic characteristics and significance of acoustic emission b-value during rock rupture extension[J]. Seismlogy and Geology，1995，(1)：7-12.(in Chinese))
[31]	龚囱，赵坤，包涵，等. 红砂岩蠕变破坏声发射震源演化及其分形特征[J]. 岩土力学，2021，42(10)：2 683-2 695.(GONG Cong，ZHAO Kun，BAO Han，et al. Acoustic emission source evolution and fractal features during creep failure of red sandstone[J]. Rock and Soil Mechanics，2021，42(10)：2 683-2 695.(in Chinese))
[32]	杨科，刘文杰，窦礼同，等. 煤岩组合体界面效应与渐进失稳特征试验[J]. 煤炭学报，2020，45(5)：1 691-1 700.(YANG Ke，LIU Wenjie，DOU Litong. Experimental investigation into interface effect and progressive instability of coal-rock combined specimen[J]. Journal of China Coal Society，2020，45(5)：1 691-1 700.(in Chinese))
[33]	谭学术，鲜学福，郑道访，等. 复合岩体力学理论及其应用[M]. 北京：煤炭工业出版社，1994：63-71.(TAN Xueshu，XIAN Xuefu，ZHENG Daofang，et al. Mechanical theory of composite rock and its applications[M]. Beijing：Coal Industry Press，1994：63-71.(in Chinese))
[34]	经纬，陈洪恩，杨仁树，等. 基于岩石蠕变及D-P准则的深部巷道围岩弹塑性分析[J]. 力学学报，2022，54(7)：1 982-1 993.(JING Wei，CHEN Hongen，YANG Renshu，et al. Elastoplastic analysis of surrounding rock of deep roadway based on rock creep and D-P criterion[J]. Chinese Journal of Theoretical and Applied Mechanics，2022，54(7)：1 982-1 993.(in Chinese))
[35]	曹朔，喻勇，汪波. 基于D-P准则和西原模型的圆形隧道黏弹-黏塑性解[J]. 岩土力学，2021，42(7)：1 925-1 932.(CAO Shuo，YU Yong，WANG Bo. Viscoelasto-viscoplastic solutions for circular tunnel based on D-P yield criterion and Nishihara model[J]. Rock and Soil Mechanics，2021，42(7)：1 925-1 932.(in Chinese))