Water-Rock Interaction Tracing and Analysis of Deep Aquifers in the Mining Area Using Isotope and Hydrochemistry Methodsoft-com:office:office" />
详细信息
- 责任者：Chen Luwang (School of Resources and Environmental Engineering ; Hefei University of Technology ; Hefei 230009 ; China) ; Yin Xiaoxi
- 刊名：Acta Geologica Sinica
- 出版年：2013
- 卷期：87(7)
- 页码：p.1021-1030
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
In order to illuminate the mechanism of water-rock interaction indeep aquifers in the concealed coal mining area in North China , this study took the Suxian-linhuan Mining Area in Huaibei coalfield for example , and 166 groundwater samples in 1985 to 2011 were collected or gathered ,which belonged to the fourth aquifer of unconsolidated formation , the coal sandstone fissure aquifer , the Carboniferous karst aquifer of Taiyuan formation and the ordovician karst aquifer. 87 Sr / 86 Sr ,34 S and 13 C of these groundwater sampleswere tested , as well as conventional components such as Na + +K + , Ca2+ , Mg2+ , HCO-3 , Cl- , SO2-4 , CO2-3 .Moreover , tracing and analysis of the water-rock interaction indeep aquifers were carried out based on isotopes and hydrochemistry.The results suggest that , among the maindischarge aquifers in the mining area , the coal sandstone fissure aquifer is predominantly characterized bydesulfurizing or cation exchange absorption ,whereas , the fourth aquifer of unconsolidated formation , the Carboniferous karst aquifer of Taiyuan formation and the ordovician karst aquifer are predominantly characterized by pyrite oxidation or hardening.The results also suggest that , under mining-induced disturbance , the primary water-rock interaction tends toweaken for the coal sandstone fissure aquifer and the ordovician karst aquifer , yet , the primarywater-rock interaction tends toweaken or strengthen for the fourth aquifer of unconsolidated formation and the Carboniferous karst aquifer of Taiyuan formation ,which is controlled by the bedrock level , the fault location and itswater-resisting property , the extent of mining-induced disturbance in the mine.