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Meanwhile, as an owner, coal mining activities will be carried out by the mining contractor under the planning and supervision by TER.
TER currently has started coal production activity at production level approximately 300,000 MT / month which is carried out by the mining contractor. TER will choose a combination of mining methods with strip mining – haul back mining. Mining method has been based on the consideration of technical factors that include geological model, coal seam condition, conditions of overburden and consideration of environmental aspects of ease of management both in the process of mining and after mining activity ends.
At the beginning of the activity, overburden will be disposed of outside the mine while forming box cut. After the available void in the area at the box cut (ex pit) is formed, overburden of the next block is disposed in the void until it reaches a certain elevation and then reclaimed. In some locations of the water flow created settling pond so that the water from the mine can be accommodated and neutralized prior pH so will not to destroy existing environmental flows out mine / public waters. For the reclamation work in some places can be done faster and topsoil can be directly spreading.
Coal mining process is done after the overburden stripped; the next stage is cleaning the roof of coal and mining by using excavators. The coal is then loaded onto trucks and transporting to coal handling facility (CHF) at some 2-4 km away. TER coal does not require washing, only crushing and screening process to produce a product size of 50 mm. Coal is transported from CHF to the mine mouth power plant at some 1 km away.
Another activity is the road maintenance work consists of leveling, spraying and compaction road. Mining fleet will be consisted of :
Management faces a large number of challenges that must be overcome and need to be handled carefully. Because certain parts of the cover layer contains sulfide e.g. pyrite (Fe2S3). These compounds will be stable when it is keep in the ground, but when the overburden stripped and exposed to air, the material sulfide will react with oxygen and water to acid.
The first step is carried out by distinguishing and separating materials PAF (Potentially Acid Forming) and materials NAF (Non Acid Forming).
Management faces a large number of challenges that must be overcome and need to be handled carefully. Because certain parts of the cover layer contains sulfide e.g. pyrite (Fe2S3). These compounds will be stable when it is keep in the ground, but when the overburden stripped and exposed to air, the material sulfide will react with oxygen and water to acid.
The first step is carried out by distinguishing and separating materials PAF (Potentially Acid Forming) and materials NAF (Non Acid Forming).
Management faces a large number of challenges that must be overcome and need to be handled carefully. Because certain parts of the cover layer contains sulfide e.g. pyrite (Fe2S3). These compounds will be stable when it is keep in the ground, but when the overburden stripped and exposed to air, the material sulfide will react with oxygen and water to acid.
The first step is carried out by distinguishing and separating materials PAF (Potentially Acid Forming) and materials NAF (Non Acid Forming).
Management faces a large number of challenges that must be overcome and need to be handled carefully. Because certain parts of the cover layer contains sulfide e.g. pyrite (Fe2S3). These compounds will be stable when it is keep in the ground, but when the overburden stripped and exposed to air, the material sulfide will react with oxygen and water to acid.
The first step is carried out by distinguishing and separating materials PAF (Potentially Acid Forming) and materials NAF (Non Acid Forming).
Management faces a large number of challenges that must be overcome and need to be handled carefully. Because certain parts of the cover layer contains sulfide e.g. pyrite (Fe2S3). These compounds will be stable when it is keep in the ground, but when the overburden stripped and exposed to air, the material sulfide will react with oxygen and water to acid.
The first step is carried out by distinguishing and separating materials PAF (Potentially Acid Forming) and materials NAF (Non Acid Forming).
Management faces a large number of challenges that must be overcome and need to be handled carefully. Because certain parts of the cover layer contains sulfide e.g. pyrite (Fe2S3). These compounds will be stable when it is keep in the ground, but when the overburden stripped and exposed to air, the material sulfide will react with oxygen and water to acid.
The first step is carried out by distinguishing and separating materials PAF (Potentially Acid Forming) and materials NAF (Non Acid Forming).
Management faces a large number of challenges that must be overcome and need to be handled carefully. Because certain parts of the cover layer contains sulfide e.g. pyrite (Fe2S3). These compounds will be stable when it is keep in the ground, but when the overburden stripped and exposed to air, the material sulfide will react with oxygen and water to acid.
The first step is carried out by distinguishing and separating materials PAF (Potentially Acid Forming) and materials NAF (Non Acid Forming).
