| Autor: |
Chen, Luwang, Tian, Yue, Wang, Yingxin, Ou, Qinghua, Peng, Zhihong, Shi, Xiaoping, He, Dingqiu |
| Předmět: |
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| Zdroj: |
Acta Geophysica; Dec2023, Vol. 71 Issue 6, p2941-2954, 14p |
| Abstrakt: |
A quaternary unconsolidated confined aquifer is one of the main sources of water inrush in Huaibei coalfield. Water abundance evaluation of the aquifer is the key to guiding water prevention in coal mining. Aiming at the issue of water abundance in the unconsolidated confined aquifer, a novel evaluation model was established based on three evaluation indexes: the depth of water level, the depth of roof and the sedimentary characteristics. Among them, the sedimentary characteristics were quantified in comprehensive consideration of three aspects: the aquifer lithology, sedimentary thickness of rock stratum and sedimentary sequence. Then, the evaluation model was validated with an accuracy of 90.57% and was applied to the Zhuxianzhuang coal mine in the Su-Lin mining areas, so the zoning prediction map of water abundance of the unconsolidated confined aquifer was obtained. The results show that medium water abundance areas are scattered in the middle part of the mine and other areas are of weak or extremely weak water abundance. The distribution characteristics of water abundance obtained from the actual detection results are consistent with that predicted by the model, which further proves the reliability of the model. The findings of this research provide a new method for the water abundance evaluation, which is of great importance to ensure safety production of coal mine under unconsolidated confined aquifer in the Su-Lin mining areas, as well as other similar mining areas. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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