| 贵州毕节岩溶斜坡地带地下水赋存规律与钻探成井模式 |
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| 关键词:groundwater karst slope zone drilling well models Bijie groundwater water resources exploitation and utilization |
| 基金项目:中国地质调查局地质调查项目(编号: DD20160285; 12120113052500);国家科技支撑计划课题(编号: 2012BAJ11B04) |
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| Groundwater Occurrence Characteristics and Drilling Well Models in Karst Slope Zone, Bijie, Guizhou Province |
| Combined with the hydrogeological survey data and 486 drilling data obtained in Bijie area of Guizhou Province, the authors found that structure, lithology and geomorphology are the main factors controlling drilling holes, which should be combined with concrete examples. The Cambrian Loushanguan Formation ( 2-3ls), the Permian Makkou Formation (P2q-m), the Triassic Jialingjiang Formation (T1j) and the Guanling formation (T2g) are the main karst water-finding layers, which account for 79.83% of the total wells, and the well completion rates are 88.1%, 41.56%, 76.32% and 70.94% respectively. The average well water inflow is divided into 409.62 m3/d, 165.93 m3/d and 291.2 m3/d. 277.42 m3/d; compared with the thick layer of pure limestone, the limestone intercalated with classic and dolomite strata have a higher well formation rate, and the average water inflow of the borehole is greater. The regional fault is no longer the favorable part of drilling water exploration. The small structures such as small and medium faults control the local rich water area as the favorable target area for drilling water exploration, and this paper sums up 4 drilling patterns: the small and medium-sized fault water control mode, the reverse fault upper plate water rich mode, the aquifer and the aquifer contact zone water rich mode, and the dolomite interlayer crack water rich mode. |
| PAN Xiao-dong,ZENG Jie,REN Kun,JIAO You-jun,PENG Cong,LAN Gan-jiang.2018.Groundwater Occurrence Characteristics and Drilling Well Models in Karst Slope Zone, Bijie, Guizhou Province[J].Acta Geoscientica Sinica,39(5):606-612. |
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