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中文摘要：
以西石门铁矿为工程背景，采用物探、监测、数值计算等方法，开展河流下伏采空区地表沉降规律研究，提出采用“补偿法”的技术措施治理河床不均匀沉降。主要研究结论如下：采用可控源音频大地电磁法可将研究区域划分为沉陷区、危险区和低电阻异常区，其中，低电阻异常区为采空区或矿体的表现；水平挤压构造应力致使地表形成椭圆形沉陷盆地，其存在增加了地表移动盆地的范围；水平挤压构造应力降低了开采最大沉降量，但使累计沉降量呈现出“突发式”增长模式；“补偿法”永久治理措施中，防渗加固主体结构包括刚性防水层、柔性防水层及抗冲刷层，可随河床沉陷而下沉，最终填平矿体开采造成的地表不均匀沉陷。
英文摘要：
Taking Xishimen Iron Mine as engineering background,methods such as geophysical prospecting,monitoring and numerical simulation were used to study the surface subsidence regularity of goaf underlying river. The technical measure, compensation method,was proposed to treat the riverbed with differential settlement. The main research conclusions are drawn as follows. The research region can be divided into subsidence area,danger area and low-resistance abnormal area by controlled source audio-frequency magneto-telluric,and low-resistance abnormal area generally represents the goaf or ore body. Horizontal extruding tectonic stress results in the elliptic subsidence basin formed in surface,and its existence increases the ground move-ment scope of basin. Horizontal extruding tectonic stress reduces the maximal mining subsidence,but makes the accumulative subsidence behave as gusty increase mode. In the permanent treatment measure of＆quot;compensation method＆quot;,the main anti-seep-age reinforcement structure consists of rigid waterproofing layer,flexible waterproof layer and anti-scour layer,which can sink with riverbed subsidence and fully fill the surface differential settlement caused by ore body mining.
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