本文以大量的现场测试数据为基础，建立了抽油机井排量系数、井下功率损失及地面效率的回归方程；
On the basis of a large number of field data, the regression equations of displacement coefficient, down-hole power loss and surface efficiency for pumping wells are established.
以数模为基础建立三维地面模型和三维道路模型。
Three dimensional ground model and three dimensional road model are established on the basis of digital to analog.
煤层的地下开采造成煤矿城市的地面沉陷，应搞好以地质状况为基础的煤矿城市的国土规划。
The surface subsidence of coal cities is created by the coal mining underground, it is necessary to make the territorial planning of coal cities, which based on the geological conditions.
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