Study On The Structure Controlling Groundwater Characteristics In The Panxie Mining Area Of Huainan Coal Field

Panxie Mining Area in Anhui Province,is an important part of Huainan coalfield.This paper uses structure,hydrogeology and water control structure theory,step by step,block tectonic evolution and gradually control methods to conduct in-depth study of Panxie mine exploration data analysis,summarized characteristics and hydrogeological structure of mining area development,research summary structure Pan Xiekuang water control features,mainly get the following conclusion:(1)The main synclinorium developed inside the Panxie Mining Area to NWW?NW trending folds,faults in the mining area is mainly NW NEE-NE stretching fault,oblique normal fault and EW trending fault,the normal fault.The mining structure mainly through Indosinian(NS to extrusion)and Yanshan period(early NW-SE to late period of extrusion,tension)and Himalayan period(mainly ES to WN plunging uneven settlement)interaction and transformation affect the formation of form now.(2)Panxie Mining Area Groundwater mainly including loose layer,coal bearing sandstone,limestone and Ordovician limestone etc.so aquifer(Group),each aquifer(Group)between a water resisting layer,and the aquifer water mainly static reserves,mining drainage is constantly consumed,the whole mining area of groundwater from west to East slow runoff.The coal rich water weak sandstone,limestone rich water weak?medium but high pressure,and the Ordovician limestone water rich weak to strong extremely heterogeneous in different sections of different.(3)Aquifer in Panxie Mining Area initially formed in Caledonian,Variscan,after Indosinian,Yanshan and Himalayan movement transformation gradually formed the existing state,water resistance and fault area surrounding the mine,the Panxie Mining Area is in a relatively closed independent hydrogeological unit.Panxie Mining Area in addition to the local fault fissure is developed at the water rich and strong,the overall poor water rich fault,the vast majority of water fault,but in the case of mining disturbance,some water into the water channel fault activation.Finally,prone to water inrush:large gap fault cutting coal group A and ash too near,the need to pay attention to too close to lower ash wells under mining disturbance may make the fault activity,fault and cutting coal and limestone to site for the weak zone is too hard to resist compressive ash high water pressure and other conditions,may cause the water into the water conductive fault fault,and water inrush.Some measures and suggestions are put forward,such as drainage and depressurization,reinforcement of the fault zone,and safety coal pillar.