气候变化领域集成服务门户(CCPortal): Disaster-causing mechanism of roof “toppling–slumping” failure in a horizontal sublevel top-coal caving face

CCPortal

DOI	10.1007/s11069-019-03841-8
	Disaster-causing mechanism of roof “toppling–slumping” failure in a horizontal sublevel top-coal caving face
	Yang S.; Li L.; Deng X.
发表日期	2020
ISSN	0921030X
起始页码	757
结束页码	780
卷号	100 期号:2
英文摘要	To reveal the disaster-causing mechanism of roof collapse in horizontal sublevel top-coal caving faces for steeply inclined thick seams, a mechanical model is proposed based on the engineering background of the Jiangcang #1 coal mine in China. It is indicated that there is a “toppling–slumping” roof failure mode in horizontal sublevel top-coal caving faces, and the impact load generated by roof topping and slumping is the main cause of disasters. The impact load increased with the increase in impact height and the decrease in top-coal fragmentation degree. The experimental results of granular top-coal impact experiments showed that the impact load decreases with the increase in top-coal laying thickness. The top-coal layer acts as a cushioning in the process of roof collapse, and the cushioning correction coefficient is between 0.40 and 0.65. The cushioning correction coefficient increases as the impact height, top-coal fragmentation degree and laying thickness increase. A method is proposed to calculate the impact load in this study, and it is validated by field measurements. © 2019, Springer Nature B.V.
关键词	Disaster-causing mechanism Horizontal sublevel top-coal caving Roof failure Steeply inclined thick coal seam Toppling–slumping
英文关键词	artisanal mining; coal mine; coal seam; disaster management; fragmentation; hazard assessment; natural hazard; roof; slumping; China
语种	英语
来源期刊	Natural Hazards
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/206023
作者单位	School of Energy and Mining Engineering, China University of Mining and Technology-Beijing, Beijing, 100083, China; Coal Industry Engineering Research Center of Top-Coal Caving Mining, Beijing, 100083, China; State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou, Jiangsu 221008, China
推荐引用方式 GB/T 7714	Yang S.,Li L.,Deng X.. Disaster-causing mechanism of roof “toppling–slumping” failure in a horizontal sublevel top-coal caving face[J],2020,100(2).
APA	Yang S.,Li L.,&Deng X..(2020).Disaster-causing mechanism of roof “toppling–slumping” failure in a horizontal sublevel top-coal caving face.Natural Hazards,100(2).
MLA	Yang S.,et al."Disaster-causing mechanism of roof “toppling–slumping” failure in a horizontal sublevel top-coal caving face".Natural Hazards 100.2(2020).