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四、预防采动损害的地下采矿措施保护地面有两种方法:一种是留保护煤柱(或称安全煤柱);一种是控制地下开采工作。煤柱的留设应使地面最终变形不超过建筑物所允许的变形。也可采用充填采空区的方法来减少矿物储量的损失。建筑物下开采时必须使开采引起的最终变形值和开采过程中的动变形均不超过允许值。这两项要求可以采用充填、部分开采和合理布置工作面等方法来达到,在地面需要加以保护的区域下方进行临界面积开
Fourth, to prevent mining damage underground mining measures There are two ways to protect the ground: one is to stay protection pillars (or safety pillars); one is to control the underground mining work. Pillar stay should be so that the final deformation of the ground does not exceed the deformation allowed by the building. Filling the gob area can also be used to reduce the loss of mineral reserves. Mining under the building must make the final deformation caused by mining and mining deformation in the mining process does not exceed the allowable value. These two requirements can be achieved by filling, partial mining and rational layout of work surfaces, etc., with a critical area open below the area where the ground needs to be protected