干旱区生态环境知识资源中心(Arid): 深埋煤层采动覆岩渗透能力变异与地下水响应模拟

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	深埋煤层采动覆岩渗透能力变异与地下水响应模拟
其他题名	Study on permeability variation and groundwater response under disturbance of deep coal seam mining
	赵春虎
来源期刊	南水北调与水利科技
ISSN	1672-1683
出版年	2018
卷号	16 期号:2 页码:171-176,201
中文摘要	针对西部深埋矿区煤炭资源开发对地下水扰动的相关研究不足的问题,依据弹塑性相关理论,利用多物理场数值模拟软件(COMSOL),研究了深埋煤层采动覆岩渗透能力变异与地下水的响应规律,模拟得出案例矿井在不同采动应力状态区覆岩渗透能力变化具有差异性:采动覆岩应力拉伸区岩体的渗透率相对增大,在采掘空间的直接顶渗透率增大26%,在地表沉陷盆地边缘增大3%;覆岩压缩区渗透率相对减小,在煤岩柱两侧渗透率减小43%,在采掘空间正上方约300 m处渗透率减小18%。由于采掘后井下采掘空间直接与大气联通,形成了以导水裂缝带范围为中心的水压降落漏斗,导致垂向水力梯度与流速加剧;而在煤层顶板300 m以上范围,水压水头基本为原始状态。研究成果为我国干旱与半干旱矿区煤-水资源合理开发、科学管控提供技术依据。
英文摘要	There is a lack of research on groundwater disturbance caused by deep coal resource exploitation in western China. Based on the elastic-plastic theory,this paper studies the variation mechanism of the seepage capacity of the overlying strata and the response of the groundwater by using the fluid solid coupling numerical simulation software COMSOL.The simulation results showed that the change pattern of overburden permeability is different in different mining stress states.The overburden permeability increased in the tensile stress zone:at the top of the excavation space it increased by 26%,and in the surface subsidence basin it increased by 3%.The overburden permeability decreased in the stress compression zone:on both sides of the coal pillar it decreased by 43%,and at about 300 mabove the mining space it decreased by 18%.A groundwater drawdown funnel was formed with the water-flowing fractured zone as the center.As a result,the vertical hydraulic gradient and flow velocity of groundwater both increased significantly,while the water pressure was basically in the original state at about 300 mabove the mining space.The research results can provide theoretical support for reasonable exploitation of coal resources and scientific management of water resources in the arid area of China.
中文关键词	地下水 ; 渗透 ; 采掘扰动 ; 数值模拟 ; 导水裂缝带
英文关键词	groundwater permeation mining disturbance numerical simulation water-flowing fractured zone
语种	中文
国家	中国
收录类别	CSCD
WOS类目	MINING MINERAL PROCESSING
WOS研究方向	Mining & Mineral Processing
CSCD记录号	CSCD:6271917
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237940
作者单位	中国煤炭科工集团西安研究院有限公司;;陕西省煤矿水害防治技术重点实验室, ;;陕西省煤矿水害防治技术重点实验室, 西安;;西安, ;; 710054;;710177
推荐引用方式 GB/T 7714	赵春虎. 深埋煤层采动覆岩渗透能力变异与地下水响应模拟[J],2018,16(2):171-176,201.
APA	赵春虎.(2018).深埋煤层采动覆岩渗透能力变异与地下水响应模拟.南水北调与水利科技,16(2),171-176,201.
MLA	赵春虎."深埋煤层采动覆岩渗透能力变异与地下水响应模拟".南水北调与水利科技 16.2(2018):171-176,201.

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