This project was located at Joda, Odisha, in eastern India. It was a brown field project and Larsen And Toubro Limited (L&T) was the main contractor appointed by Tata.
Since the mine was on hilly terrain, the construction work involved lots of excavation and filling. Due to the excavation, some exposed slopes became vulnerable to erosion and a few slopes started falling. The Secondary Crusher House and JNT-3 was constructed on a bench of the hillock, where the slope was steep, exposed and 17m high (one bench of 10m and another of 7m).
Odisha is very close to the Bay of Bengal and the monsoon is quite heavy here. After the first year’s monsoon, the slope below the Secondary Crusher House and JNT-3 started failing from different pockets due to severe erosion. The steep slope became even steeper, almost vertical in many places. L&T identified the potential risk of for the crusher house and called Terre Armée in India for a durable solution. Slope stability analysis was carried out and Galvanized TerraNail® was proposed by Terre Armée to stabilize the slope.