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  2. Volume 25 Number 3, October 2025
  3. BAHARUDDIN

Design analysis of drainage system design on coal mining land

ICHSAN INVANNI BAHARUDDIN, RUSLI HAR, MUHAMMAD HABIB ASSHIDIQQI, RUDY ANARTA, DENNY AKBAR TANJUNG, ENDANG MARYANTI

Abstract


PT Bumi Bara Makmur Mandiri is a mining company engaged in coal mining, located in Hajran Village, Bathin XXIV District, Batang Hari Regency, Jambi Province. The company employs an open-pit mining method, which results in the formation of depressions that act as rainwater catchment areas, creating pools (sumps). To manage these sump areas effectively for mining activities, a mine dewatering drainage system is implemented. Over the past ten years, rainfall data indicates a catchment area of 246.02 hectares, with an estimated rainfall of 280.88 mm for a return period of ten years. The groundwater that accumulates in the pooling area has an inflow rate of 0.11 m³/s, leading to a total water discharge entering PIT A of 39.12 m³/second. Currently, there is one pump available with a power capacity of 10.83 kW to remove this water. Due to the significant water discharge, it is essential to design an economical open flow that can handle a flow rate of 2.96 m³/s. Furthermore, a design for a holding pond is required, as the existing capacity is insufficient to accommodate the incoming water discharge, which hampers the sedimentation process. To address this, a redesigned settling pond with dimensions of 46 m x 36 m x 7 m and six compartments has been proposed. This solution will enhance the effectiveness of the mine drainage process

Keywords


Mine Drainage; Open Channels; Rain Catchment Areas; Rainfall; Settling Ponds

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DOI: 10.24815/jn.v25i3.45589

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