鄂尔多斯盆地侏罗系地下水系统及矿井防治水对策
Jurassic underground water system in Ordos Basin and mine water prevention and control countermeasures
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摘要: 为了掌握侏罗系地下水对侏罗系煤田开采的影响,须全面研究盆地尺度的鄂尔多斯盆地侏罗系地下水系统特征。通过对鄂尔多斯盆地侏罗系地下水的水动力场、水化学场、同位素场的综合分析研究,指出侏罗系地下水主要有重力流和压实流2种流动形式,其中侏罗系顶界埋深大于1 200 m的天环坳陷以压实流为主,其他地段以重力流为主。研究表明,盆地侏罗系地下水系统可划分为裸露区和隐伏区2个含水亚系统、6个子系统。侏罗系地层埋深小于300 m的浅部交替积极带矿井涌水量以动储量为主,埋深300~1 300 m的径流缓慢带矿井涌水量以静储量为主。在断层较发育、砂体发育、补给条件较好的地段,侏罗系含水层富水性相对较强,是侏罗系煤田矿井防治水的重点。Abstract: in order to understand the Jurassic underground water system afected to the mining of the Jurassic Coalife , it was necessary fom the basin dimensionto study the features of Jurassic underground water system in Ordos Basin. With a comprehensive anaysis and stidly conducted on the hydrodiynamic fe d, hydrochemical feld and isctope fied of the Jurassic underground water in Ordos Basin,the paper pointed out tht the Jurassic underground water systen manly had to fowing modes of a gravity fiow and a compaction f1ow.Among the two fuids ,the topline of th Jurassic mainly with the compaction fov had a deeper depth over 1 200 m than Tanhuan Depression and other sections were mainly the gravity fow.The stutly showed that the Jurassic underground water system of Oros Basin could be didedto wo water-bearing subsystems and six sub-systens in an exposed zone and concealed zone. The mine water infow volume fron the shall w atenative actve zone witha depth of
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