最大下沉值是度量层状矿体（如煤层）开采引起的地表移动变形程度的重要参量。
The maximum subsidence induced by mining bedding ore(such as coal seam) is an important parameter for estimating the degree of surface movement and deformation.
从这么深的地方抽水，最大的问题是地表会逐渐下沉。
The biggest concern of pumping out water from this deep is the gradual settling down of the land surface.
根据国外资料和我国的实际情况，指出在有废弃矿井和岩溶矿区的地表存在再次下沉和塌陷的可能性最大。
The paper present there exists great possibility of ground subsidence in abandoned pit of karstic district base on some materials from abroad and practical conditions at home.
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