STABILISATION OF OVERBURDEN DUMPS IN SINGRAULI

The slope was divided into fragments with berms in between. Gabion toe walls were placed at the toe of each slope fragment and mulching (to promote vegetation) was done. A non-woven geotextile was provided as a filter and separator behind gabion walls. Additional French drains at c/c spacing of about 3-5 m were proposed across the slope to ensure drainage and thus preventing erosion. The mulching and natural jute blanket provided on slope prevents local erosion. Maccaferri’s solution was adopted for the following advantages: 1) Speed of construction: Large quantity of earthwork was involved and limited time was available for construction. It was necessary to carry out restoration work before the onset of monsoons to prevent collapse of dumps. 2) Cost-Effectiveness: The cost of Gabions structure was low. 3) Simplicity in construction: Execution of stabilization work using gabion technology was simple. 4) Environmental Friendliness: The solution not only proposed to stabilize dumps but also to establish vegetation along the slope.