Study On The Effect Of Groundwater Quality And Quantity In Coal Mining

This paper takes coal mining of Daizhuang in Shandong as an example, throughcollecting relevant information and taking35water samples from the main aquifer for generalquality analysis and isotope test, groundwater hydrogeochemical characteristics of differentaquifer were analyzed and aquifer quality distribution as well as migration patterns weresummarized. Based on the database, mine hydraulic discharge are predicted using numericalmethod and analytical method, as well as the effect of groundwater quality and quantity incoal mining are studied. The study shows that the quality of Ordovician limestone are the typeof SO₄-Ca Mg, the quality of Taiyuan limestone of thirteen except the sample of the8th arethe type of SO4-Ca（Mg）, and the quality of below Taiyuan limestone of ten extraordinarilycomplex and change more that the quality changes from the type of HCO₃-Na to the type ofSO4-Ca（Mg）, and the water quality with the different of the groundwater recharge mixtureratio appear different type of transitional water quality. Mine is mainly affected by the directroof of below limestone of ten and the bottom plate of limestone of thirteen as well asOrdovician limestone. There are large differences between the below limestone of ten and thelimestone of Ordovician and thirteen, which have lower SO₄^2-Ca²⁺Mg²⁺and higher HCO3Na⁺with minimum degree of mineralization in the three aquifers. The below limestone often and the limestone of Ordovician and thirteen have certain hydraulics connection, but thehydraulics connection is not strong, and that Ordovician limestone and the limestone ofthirteen have a strong hydraulics connection. mine hydraulic discharge are used numericalmethod and analytical method to calculate, because the quality of the limestone of ten andthirteen are very uneven and the hydraulic conductivity is different, so analytical method cannot simulate, calculations of mine hydraulic discharge only can take the calculation results ofnumerical method, in order to study on the effect of groundwater quality and quantity in coalmining...