DOI: 10.1007/s11069-019-03841-8
论文题名: Disaster-causing mechanism of roof “toppling–slumping” failure in a horizontal sublevel top-coal caving face
作者: Yang S. ; Li L. ; Deng X.
刊名: Natural Hazards
ISSN: 0921030X
出版年: 2020
卷: 100, 期: 2 起始页码: 757
结束页码: 780
语种: 英语
中文关键词: 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
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/168822
Appears in Collections: 气候变化与战略
There are no files associated with this item.
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
Recommended Citation:
Yang S.,Li L.,Deng X.. Disaster-causing mechanism of roof “toppling–slumping” failure in a horizontal sublevel top-coal caving face[J]. Natural Hazards,2020-01-01,100(2)