淮北桃园煤矿北八采区太原组灰岩含水层放水试验水质监测成果分析

Analysis on Observation Result of Water Quality during Draining Test in Aquifer of Limestone of Taiyuan Formation of the Eighth Mining Area in North of Taoyuan Coal Mine in Huaibei

为了判断桃园煤矿北八采区太原组灰岩含水层富水性及其补给水源,在井下对太原组灰岩含水层实施了放水试验,采集不同放水阶段太原组灰岩水样,对其常规水化学指标进行了测试,并与井田各含水层水化学指标进行了分析对比。结果表明:北八采区太原组灰岩水与井田南部采区新生界松散层第四含水层的水以及煤系砂岩水的水质差别较大,与南部采区太原组灰岩水的水化学指标也存在一定的差异,而与奥陶系灰岩水的水化学指标基本一致;并随放水时间的延长,水质更趋同于奥陶系灰岩水;北八采区太原组灰岩水与奥陶系灰岩水存在水力联系,接受奥陶系灰岩水的补给。研究成果对该区太原组灰岩水的防治有重要的指导意义。

In order to evaluate the water abundance of aquifer of limestone of Taiyuan Formation of the eighth mining area in north of Taoyuan coal mine and its resource, the draining test has been taken under mine in the aquifer of limestone of Taiyuan Formation. The water samples in limestone of Taiyuan Formation in different periods of draining have been got and the normal hydrochemical indexes have been tested as well as they have been analyzed and compared with the hydrochemical index of each aquifer in the coal mine. The results show that there is a great difference between the water quality of limestone of Taiyuan Formation of the eighth mining area in north and the fourth aquifer as well as the coal measure sandstone of Cenozoic loose bed of the Southern mining area, and differ- ences also exist in the comparison with hydrochemical index of water of limestone of Taiyuan Formation in Southern mining area while it＇ s in accordance with the hydroehemical index of water of limestone of Ordovician. The water quality tends to be like the water of limestone of Ordovieian with the draining. The water of Taiyuan Formation of the eighth mining area in north has a hydraulic relation with the water of limestone of Ordovician and the former is supplied by the water of limestone of Ordovician. The research result has a great significance for the controlling and preventing of the water of limestone of Taiyuan Formation in the region.