Caused by the natural and man-made factors, the ground subsidence is the disaster phenomenon of environmental geology with regionally ground level decreasing, which resulted in the compact of soil.
地面沉降是在自然和人为因素作用下，由于地壳表层土体压缩而导致区域性地面标高降低的一种环境地质灾害现象，是一种难以补偿的永久性环境和资源损失。
Ground surface subsidence disaster caused by underground mining is a new problem of highway's construction of our country.
地下开采所引起的地表沉陷灾害是我国高速公路建设中所面临的一个新的课题。
The evaluation of the safe yield of ground water must be based on that the disaster ground subsidence don't take place. The control of ground subsidence is the control of disaster ground subsidence.
地面沉降条件下的地下水允许开采量评价必须以灾害性地面沉降不发生为前提，地面沉降的控制应是控制灾害性地面沉降。
The evaluation of the safe yield of ground water must be based on that the disaster ground subsidence don't take place. The control of ground subsidence is the control of disaster ground subsidence.
地面沉降条件下的地下水允许开采量评价必须以灾害性地面沉降不发生为前提，地面沉降的控制应是控制灾害性地面沉降。
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