R. Andy Erwin Wijaya
Staf Pengajar Program Studi Teknik Pertambangan, STTNAS Yogyakarta
E-mail: andy_sttnas@yahoo.com
Coal mining activity generally can generate negative impact to environment on mining location. One of the negative impact is contamination of acid mine drainage which able to destroy environment and ecosystem as water and soil. High potency source of acid mine drainage formed on coal mining location are water pond and waste dump.
This aim of the research are control of acid mine drainage from water pond and prevention of acid mine drainage formed on the waste dump. The control system of acid mine drainage contamination included treatment of acid mine drainage into water pond and management of oxide/ benign waste on the waste dump. Treatment method is neutralization of acid mine drainage into water pond using alkali reagent. The most effective and economic alkali reagent is limestone. Amount of limestone needed to neutralize of acid mine drainage (5040 m3) into water pond is 104.56 kg. The management of oxide/benign waste is application of encapsulation in-pit disposal model. This model is more effective to prevent acid mine drainage formed. Cover materials are often clay subsoils and have been used for covering to prevent oxidation. The clay have high compaction rates and low permeability (2.3148 x 10-9 m/s) and this material is sufficient availability.
Keyword: acid mine drainage, water pond, waste dump