DRAINAGE MINE PLANNING SYSTEM TO SURFACE MINE

DRAINAGE MINE PLANNING SYSTEM
TO SURFACE MINE CV. AIR MATA EMAS

 

Name             : Azril. A

Student id      : 0810024427011

Supervisor I   : Ansosry, ST, MT

Supervisor II  : Rosben Aguswar, Ir.

 

ABSTRACT

 

Mining operations carried out by CV. Air Mata Emas using a system of open pit strip mining methods. In the open pit operations in direct contact with the outside air, so that mining activity is strongly influenced by climate. One of the most influential climate is rainy. Rain is the main source of water in open pits. The presence of water on the floor of the bench will be very disturbing mining activities, the water should be removed from the mine site. It required a careful planning for handling the runoff water before it goes into public waters. Runoff water treatment is planned in the form of an open channel or drainage, to be made subsequent siltation pond as sludge handling container carried by water runoff.

Research conducted classified experiments to study the primary variable is the rainfall data and the data catchment area, where the source data comes from secondary data from local rainfall data Kumanis 12 years, the study area topographic map scale 1: 5000, literature-related literature drainage science and data mining on the ground.

The magnitude of the design rainfall is 103.20 mm / day. Conditions of the mining area is partially bald with a slope varying between 3-15% and> 15% resulting in water runoff flows rapidly into line with the runoff coefficient between the numbers 0.6, 0.7, 0.8 and 0.9 is more dominant. Mine systems in the mining drainage CV. Air Mata Emas does not require pumping, becauase for mining positions to extent mining is still higher than the siltation pond.

Rainfall is high in the study area with state of the rainfall intensity (It) ranged from 35.91 mm / hour up to 69.42 mm / h. Total discharge of water runoff in the study area of ​5.13 m / sec or equal to 18,468 m³ / h. That requires a parent channel to drain water runoff into the pond siltation. Channels of trapezoidal cross-section is made with a relatively long bridge with a slope of 2:3. As a container for the control of mud carried by runoff water created a slurry settling ponds with a size of 188.66 m x 34 m x 6 m which is divided into 3 partitions / sections.

Keywords :      Contrivance rainfall, water off the rain discharge, dimension of canal and dimension of sedimentation sump.