Abstract
Problem statement: Making iron ore is one of the largest mining proje cts in south east of china. Due to the development of mining activities in that site, it has become necessary to increase t he depth of exploration. Increase the exploration dept h makes the mining tunnels subjected to the karst water inrush. Approach: A hydrological and a hydrogeological model for the Makeng area have been developed, which yield information on relevant para meters such as groundwater recharge and margins' lateral inflow, to estimate aquifer yield. USGS flo w code, MODFLOW 2000, was used to produce the numerical model. Collected GIS based information was synthesized in a finite difference numerical model. The regional steady and transient-state flow was calibrated under pre-development conditions assuming an equivalent porous medium approach. Results: Water budget calculations show that the total groundwater flow in regional aquifers amounts to 2.98 mm 3 year -1 . Infiltration from precipitation provides 61.7% of the groundwater supply, while 21% comes from lateral inflow and the remaining 17.3% is induced recharge from surface waters. Disc harge from regional aquifers occurs through springs outflow 88.5% and flow to streams 11.5%. Conclusion/Recommendations: Although the karstic nature of the limestone aquifer the equival ent porous-medium flow model is appropriate to represent hydraulic heads and recharge/discharge re lationships on a regional scale. The results of thi s study can be used to predict the required amounts o f pumping and the possible locations to dewater the groundwater around the mining tunnels.
Highlights
INTRODUCTIONThe numerical model was used to estimate the regional water budget
Increase the exploration depth makes the mining tunnels subjected to the karst water inrush (Wu et al, 2004)
The clear identification of hydrogeological conditions of karst aquifers is required as an important task in dewatering design
Summary
The numerical model was used to estimate the regional water budget This manuscript is the second study describing the hydrogeological components of Makeng mining project. Hydrogeological characteristics of the study area: The making iron-mining project is located in mountain region at the southern part of Longyan City, west of Fujian province. The limestone aquifer outcrop the surface with a weathering zone in the south eastern part of the study area and plays an important role in receiving and passing the downward precipitation recharge over the entire area. It is separated from the upper unconfined sandstone aquifer by a 0-50 m thick mudstone aquitard
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
