Abstract
With the increasing of coal mining depth, the coal seam floor is threatened more and more seriously with the limestone aquifer of Taiyuan Formation. In order to make the coal seam floor water inrush accident to be effectively prevented, it is very important to ascertain the hydro-geological condition of the research area and adequately gain hydro-geological parameters. Based on the theory of chemical dynamics, the chemical dynamical equation of the mineral was obtained. The chemical dynamical equation of the mineral and the Darcy’s Law were combined to derive the expression of permeability coefficient and transmissibility coefficient that was indicated by hydro-chemistry index. Based on the data of water quality analysis in the research area, the hydro-geology parameter of the aquifer of Taiyuan Formation was calculated. And it was compared with what the hydro-geology parameter was determined by the data of pumping test. The results show that the permeability coefficient (K) of the research area is 1.7512 m/d, and transmissibility coefficient (T) is 42.0282 m2/d. The calculated results of chemical dynamics and pumping test results are little different between them. And it has certain practical significance in the mine water control. It provides an effective method for obtaining hydro-geological parameters.
Highlights
With the increasing demand for coal resources in China, the work of coal mining is gradually developed into the deep mining depth and complex geological conditions [1] [2] [3] [4]
The results show that the permeability coefficient (K) of the research area is 1.7512 m/d, and transmissibility coefficient (T) is 42.0282 m2/d
According to the results of the hydro-geological parameters in Table 4, we can know that the permeability coefficient in research area is equal to 1.7512 m/d and the transmissibility coefficient is equal to 42.0282 m2/d
Summary
With the increasing demand for coal resources in China, the work of coal mining is gradually developed into the deep mining depth and complex geological conditions [1] [2] [3] [4]. According to Hu W.Y. et al [8], a simple method of calculating hydro-geological parameters was introduced by the observed dynamic data of ground water level for a long time. These methods of obtaining hydro-geological parameters could be summarized as hydrodynamic methods [4]-[9]. Experts and scholars have put forward the method of chemical dynamics to obtain hydro-geological parameters [10]-[15] and the quantitative evaluation of hydro-geological conditions in the study area is realized On this basis, this paper took a mine in Anhui province as an example.
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