Behaviour of Reinforced Mine Waste Model Walls under Uniformly Distributed Loading

 

Sumitra S. Kandolkar

Research Scholar Civil Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai 400076 Maharashtra, India
e-mail: 10404806@iitb.ac.in

J. N. Mandal

Professor, Civil Engineering Department, Indian Institute of Technology Bombay, Powai, Mumbai 400076 Maharashtra, India
e-mail: cejnm@civil.iitb.ac.in

 

 ABSTRACT

Mine waste is a by-product of mine processing units that produce ore. Approximately on an average 2.5 to 3 tons of mine waste is generated to produce a ton of iron ore in Goa state, India. Considering the growing mining activity in Goa region, mine waste from Advalpal village was used in the study as an alternative backfill material for reinforced soil walls. Model tests were performed on reinforced mine waste walls to examine the horizontal displacement of fascia and failure mechanism under uniformly distributed loading. Steel grid in the form of L-shaped discrete units was used to prepare wall fascia and bamboo strips were used as reinforcement material. The length of reinforcement (Lr) used in the study was 0.3H, 0.5H and 0.7H, where H is height of wall. The results show that bamboo strips are effective in reducing the horizontal displacement of the wall fascia. The displacements are reduced with increasing length of reinforcement and the uniformly distributed loading at failure increased with increasing length of reinforcement.

Keywords: Mine waste, bamboo strip, steel grid, reinforced walls.

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