Investigation on the Fragmentation and Outburst Mechanism of Coal Sample with Pore Gas Using CDEM

doi:10.3390/min13030351

IMECH-IR > 流固耦合系统力学重点实验室

	Investigation on the Fragmentation and Outburst Mechanism of Coal Sample with Pore Gas Using CDEM
	Zhang, Qunlei 1; Wang, Zhiming 1,2; Feng C(冯春); Zhu XG(朱心广); Zhou J(周俊)
发表期刊	MINERALS
	2023-03
卷号	13 期号:3 页码:351
摘要	In this paper, using the continuum discontinuum element method (CDEM), the fragmentation and outburst process of coal specimen are simulated, and the main factors affecting coal breaking and outburst are explored. The results show that after the coal seam is uncovered, coal generates obvious failure and outburst trend. Near coal free surface, the fracture coal blocks generate significant displacement, resulting in larger opening widths of coal cracks. Coal deep generates the cracks without an obvious opening width. The crack density of coal with pore gas is larger than those of coal without gas, and it is larger than those of coal without pores. However, in the early stage of coal failure, the obvious separation and outburst ranges of coal with gas are smaller than those of coal without gas, and are smaller than those of coal without pores. The numbers of fracture coal blocks show an increase with the growth of in situ stress, pore ratio and gas pressure. The effect of in situ stress on fracture coal block number (517 10,203) is larger than the effect (7589 15,170) of pore ratio and is larger than the effect (5803 6836) of gas pressure. The effect of in situ stress on a maximum size (0.0387 0.138 m) of fracture blocks is larger than the effect (0.0342 0.0733 m) of pore ratio and is larger than the effect (0.0454 0.0578 m) of gas pressure. The coal outburst velocity and range show an increase with the growth of gas pressure and in situ stress (3.77 5.65 m/s); however, the coal outburst shows a slow decrease with a growth of pore ratio. The effect of gas pressure on the coal outburst velocity (11.51 21.9 m/s) is larger than the effect (3.77 5.65 m/s) of in situ stress and is larger than the effect (4.52 5.23 m/s) of pore ratio. This investigation is beneficial to understand the mechanisms of coal gas outburst in coal mining and roadway excavation.
关键词	coal gas outburst in situ stresses pore ratios gas pressures CDEM
DOI	10.3390/min13030351
收录类别	SCI
语种	英语
WOS记录号	WOS:000958518200001
WOS研究方向	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
WOS类目	Geochemistry & Geophysics ; Mineralogy ; Mining & Mineral Processing
项目资助者	National Key Research and Development Program of China [2018YFC1505504] ; Science and Technology Project of Henan province [222102320295] ; Fundamental Research Funds for the Universities of Henan Province [NSFRF220441] ; Key Scientific Research Projects of Colleges and Universities in Henan Province [23A440003]
论文分区	二类
力学所作者排名	1
RpAuthor	Feng, C (corresponding author), Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China. ; Feng, C (corresponding author), Univ Chinese Acad Sci UCAS, Sch Engn Sci, Beijing 100190, Peoples R China.
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/91790
专题	流固耦合系统力学重点实验室
作者单位	1.North China Univ Water Resources & Elect Power, Sch Civil Engn & Commun, Zhengzhou 450045, Peoples R China 2.Henan Polytech Univ, Sch Energy Sci & Engn, Jiaozuo 454003, Peoples R China 3.Collaborat Innovat Ctr Coal Work Safety, Jiaozuo 454000, Peoples R China 4.Chinese Acad Sci, Inst Mech, Beijing 100190, Peoples R China 5.Univ Chinese Acad Sci UCAS, Sch Engn Sci, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Qunlei,Wang, Zhiming,Feng C,et al. Investigation on the Fragmentation and Outburst Mechanism of Coal Sample with Pore Gas Using CDEM[J]. MINERALS,2023,13,3,:351.
APA	Zhang, Qunlei,Wang, Zhiming,冯春,朱心广,&周俊.(2023).Investigation on the Fragmentation and Outburst Mechanism of Coal Sample with Pore Gas Using CDEM.MINERALS,13(3),351.
MLA	Zhang, Qunlei,et al."Investigation on the Fragmentation and Outburst Mechanism of Coal Sample with Pore Gas Using CDEM".MINERALS 13.3(2023):351.

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