干旱区生态环境知识资源中心(Arid): 灌溉对西北干旱荒漠区排土场边坡稳定的影响以乌海市新星煤矿为例

Arid

	灌溉对西北干旱荒漠区排土场边坡稳定的影响以乌海市新星煤矿为例
其他题名	Influence of irrigation on slope stability of dump in arid desert area of Northwest China: a case study of Xinxing coal mine, Wuhai
	邱驰 1; 黄建坤 1; 胡雨村 1; 郭小平 2; 胡云卿 3
来源期刊	浙江大学学报. 工学版
ISSN	1008-973X
出版年	2019
卷号	53 期号:8 页码:1467-1477
中文摘要	为了揭示我国西北干旱荒漠化地区的煤矿排土场边坡在灌溉作用下的流固耦合力学机制,采用渗流力学理论与岩土力学理论相结合的方法,引入Darcy定律和质量守恒定律进行公式推导以建立流固耦合分析方法.以乌海市新星煤矿为例,采用ABAQUS有限元软件构建边坡非饱和土的流固耦合稳定性分析模型,根据植被需水量以及降雨强度选定5、20、45、70 mm/h这4种等效灌溉强度并交叉搭配2、9、15 h这3种持续灌溉时间,形成12套灌溉方案进行数值模拟.将数值结果与已有试验结果进行对比,结果表明,当入渗水量增加,边坡竖向变形位移、孔隙水压力分布、等效塑性应变以及安全系数均往不利于边坡稳定的方向发展.当等效灌溉强度为70 mm/h、灌溉持续时间为15 h时,边坡竖向位移出现大幅度增长,安全系数急剧降至1.03.在满足植被生长需水量的条件下,应控制灌溉强度,采用短持续时间、间隔灌溉,减少坡面径流出现的可能性,同时应做好截排水和坡面防护措施.
英文摘要	The seepage mechanics theory was combined with the geomechanics theory to reveal the fluid-solid coupling mechanical mechanism of slopes on the coal mine dump under irrigation in an arid desert region of Northwest China. The Darcy law and the mass conservation law both were introduced to derive the fluid-solid coupling analysis method. Taking Xinxing coal mine of Wuhai city as a sample, the finite element software ABAQUS was used to establish the slope stability model of unsaturated soil under the fluid-solid coupling theory. Twelve types of irrigation schemes were used in the numerical simulation by choosing four types of equivalent irrigation intensity (i.e. 5 mm/h, 20 mm/h, 45 mm/h and 70 mm/h) and three sorts of continuous irrigation time (i.e. 2 h, 9 h and 15 h) according to the water requirement of vegetation and the rainfall intensity, respectively. The numerical results were compared with the existing experimental results. Results showed that the four indicators, including vertical deformation of slope, pore water pressure distribution, equivalent plastic strain, and safety factor, developed in the direction which was not conducive to the slope stability when the infiltration water increased. When the equivalent irrigation intensity was 70 mm/h and the irrigation time was 15 h, the vertical deformation of the slope increased significantly and the safety factor decreased rapidly to 1.03. Under the condition of meeting the water requirement of vegetation growth, the irrigation intensity should be controlled, and short duration and interval irrigation should be adopted to reduce the possibility of slope runoff. Simultaneously, the measures of interception and drainage as well as slope protection should be taken.
中文关键词	干旱荒漠区 ; 煤矿排土场 ; 灌溉 ; 有限元法 ; 边坡稳定
英文关键词	arid desert area coal mine dump irrigation finite element method slope stability
语种	中文
国家	中国
收录类别	CSCD
WOS类目	CONSTRUCTION BUILDING TECHNOLOGY
WOS研究方向	Construction & Building Technology
CSCD记录号	CSCD:6547756
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/239696
作者单位	1.北京林业大学水土保持学院;;北京林业大学水土保持学院土木工程系, 水土保持国家林业局重点实验室;;, ;;, 北京;;北京 100083;;100083, 中国; 2.北京林业大学水土保持学院;;北京林业大学信息学院, 水土保持国家林业局重点实验室;;, ;;, 北京;;北京 100083;;100083, 中国; 3.中国市政工程华北设计研究总院有限公司, 天津 300074, 中国
推荐引用方式 GB/T 7714	邱驰,黄建坤,胡雨村,等. 灌溉对西北干旱荒漠区排土场边坡稳定的影响以乌海市新星煤矿为例[J]. 北京林业大学,2019,53(8):1467-1477.
APA	邱驰,黄建坤,胡雨村,郭小平,&胡云卿.(2019).灌溉对西北干旱荒漠区排土场边坡稳定的影响以乌海市新星煤矿为例.浙江大学学报. 工学版,53(8),1467-1477.
MLA	邱驰,et al."灌溉对西北干旱荒漠区排土场边坡稳定的影响以乌海市新星煤矿为例".浙江大学学报. 工学版 53.8(2019):1467-1477.