Influence of drain hole inclination on drainage effectiveness of coal open pit mine slope

[摘要] Drain hole has an important role to reduce groundwater table on a slope of coalopen pit mine. Groundwater condition on acoal open pit mine slope with a homogeneous groundwater flow media is highly dependent on the type of lithology and the groundwater bearing-rocks. The drain hole on acoal open pit mine slope is very influential on the water discharge and the length of the drain hole. This paper presents a discussion on the effect of drain holeinstallation with an inclination angle of 65° and 90° on the discharge and drain hole length. The results show that the drain hole with an angle of 65° results in greater groundwater discharge than the 90° angle. In addition, the drain hole with inclination angle of 65° is shorter than that of the drain holeinstalled with an inclination angle of 90°, thus reducing the operating costs of the open pit mine slope drainages.

[发布机构] Lect. of Mining Engineering of Universitas Pembangunan Nasional Veteran Yogyakarta, Indonesia Jalan SWK 104, Sleman; 55283, Indonesia^1;Lect. of Mining Engineering of ITB, Indonesia Jalan Ganesha 10, Bandung, Bandung; 40132, Indonesia^2;PhD Stud. Mining Engineering of ITB, Indonesia Jalan Ganesha 10, Bandung, Bandung; 40132, Indonesia^3;PT Berau Coal, Berau, Indonesia Jalan Pemuda 40, Tanjung Redeb Berau; 77311, Indonesia^4

[效力级别] 矿业工程

[关键词] Drain holes;Ground water discharge;Ground water table;Groundwater conditions;Inclination angles;Open-pit mine slopes;Pit mines;Water discharges