Study On The Stucture Controlling Ground Water In The Mayingbao Well Field Of The Shuonan Mine Lot

Mayingbao well field located in the south of Shuonan mining lot is the most important mining for China Coal Pingshuo Company. Analysising the lots of preliminary exploration data by using the basic theory of structural geology and hydrogeology with the field study and experimental measurement, the theise study it’s the regulation of structure and hydrogeology, discusses the characteristic of structure conducting(controlling) water in Mayingbao well field and predicts water inrush area in Mayingbao well field, which serves for mine construction and safety and high effective product.We get several conclusions.(1) The two wings wide flat fold and the NNE, NE and NEE trending and 70 degrees high Angle narmal fault are developed in Mayingbao well field.The distance to Dan Shuigou faul, F15 and F8 is shorter, the structure is more complex.Experiences structure movement of the NW-SE trending of the early and middle Indosinian to Yanshan period compressive shear stress, the N-S and NW-SE trending of the lately Yanshan to the early Himalayan period extensive stress and the NEE trending of the middle and lately Himalayan period cpmpressive stress, which consists of structural framework at present.(2) Mayingbao well field located in the Gengzhuang-Taipingyao water exchange actively runoff belt, which have the Cenozoic pore aquifer groups, the Carboniferous Permian sandstone fracture aquifer groups and the Ordovician karst fissure water aquifer groups and in which the height of aquifer becomes lower from northweat to southeast. Under control of structure, water flow to the northeast of mining of Shen Tou. The thinner in north and thicker in south of the Cenozoic clay aquiclude, the Carboniferous Permian mudstone water-resisting layer between the layers and the Benxi group of water-resisting layer are developed in Mayingbao well field.(3) Water flowing in study area is obviously under control of structure: water flowing is different in the north or south of Danshuigou fault; water flowing in Shuonan mining lot is under control of Shuoxian syncline and Qiusiyuan syncline; water flowing in Mayingbao well field is under control of monocline. Discriminatory anaylsising the ion charatiersitic of Mayingbao well field aquifiers water sample by Piper trilinear nomograph, hierarchical cluster analysis and Bsyes discriminarory anaylsis on hydrogeochemical method, it’s be found that water ion ingredients near F8, F10, F15 and DF11 are similarity to another two aquifer group so that they are maybe the comductive structure. Because the content of Na++K+ in Ordovician water are great difference in two sides of DF6, it’s water blocking structure. According to lithology in two sides of fault, the hanging side in Dan Shuigou fault, F1, F5, F8, F8-1, F15, F21 and F25 is corresponding to Ordovician karst fissure water aquifer groups, which have ability to conduct water. Regional tectinic movement provide material basis to ground water; mining lot structure control the hydrogeological unit boundary of ground water; mining structure control hydraulic connection among different aquifers.(4) On basis of the watery of coal mine roof and floor and the structures development degree to forecast water inrush area in 4 mine(9 mine) roof and floor, it’s be thought that there is more water inrush possibility in some area of the north or south to the middle and other area in Mayingbao well field. There is more Ordivician water inrush abilitily in the some area of the north and south in Mayingbao well field.