Mining project should be carried out by combining hydrogeologicalsurvey with geological survey of previous period so as to establish basic hydrogeological condition and correlated parameters.
煤炭开采工程应该把水文地质勘察工作与前期地质勘探工作结合进行，以查明基本的水文地质条件与相关参数；
2
The purpose of most of the hydrogeologicalsurvey in coalfield is to prospect the water content of the industrial coal bed adjacent rock and the water content and permeability of main fault and so on.
大多煤田水文地质调查的任务是查明区内工业煤层围岩的赋水性、主要断层的含水及导水性等问题。
3
Firstly collection of the mine survey and pumping test data, learn more about the geological and hydrogeological conditions of study area.