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Designs for dewatering and optimization of pit slopes in saprolite overburden : a case study of the PT. Kayan Putra Utama Coal project

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dc.contributor.author Lesmana, Antony
dc.date.accessioned 2012-10-04T19:02:00Z
dc.date.available 2012-10-04T19:02:00Z
dc.date.copyright 2012 en
dc.date.issued 2012-10-04
dc.identifier.uri http://hdl.handle.net/2429/43344
dc.description.abstract Effective dewatering and environmental program poised to have a significant impact on the feasibility of saprolite mining operations. It is therefore necessary to strike a balance between an effective dewatering program and sound environmental policy. Using assessments such as rainfall, climate studies, groundwater flow, and aquifer characterizations, the Separi coal dewatering program includes the construction of water channels, flood protection levees, water wells, and placing various environmental monitoring sites. The construction of water channels and flood protection levees has reduced the water runoff that entered the mining area by approximately 75%. For a six-month testing period, the average pumping rate of the dewatering well was 24.78 m³/day. These pumping rates were determined to result in groundwater level that would generally be 10 meters below the lowest mining benches at all times. Ten meters is the recommended single bench height based on the slope stability analysis. After six months of dewatering, the groundwater level was lowered 10.88 meters, permitting the mining project may begin its mining operation to commence. A re-design of maximum pit slope angle is indicated in this research. During the testing period, the environmental management plan did not show any negative impacts of dewatering programs on surface and groundwater resources. The monitoring sites all yield acceptable range of water quality parameters, such as Electrical Conductivity (EC), Total Suspended Solids (TSS), Total Dissolved Solids (TDS), and pH value. The company continues to monitor the water resources to maintain acceptable water quality in the study areas. en
dc.language.iso eng en
dc.publisher University of British Columbia en
dc.title Designs for dewatering and optimization of pit slopes in saprolite overburden : a case study of the PT. Kayan Putra Utama Coal project en
dc.type Electronic Thesis or Dissertation en
dc.degree.name Master of Applied Science - MASc en
dc.degree.discipline Mining Engineering en
dc.degree.grantor University of British Columbia en
dc.date.graduation 2012-11 en
dc.degree.campus UBCV en
dc.description.scholarlevel Graduate en

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