Seismic Monitoring of Rockbursts and Underground Blastings for Assessing the Stability of Deep Mine Workings at Kolar Gold Fields,

Abstract: Rockbursts (RBs) are known to occur in and around deep mines like Kolar Gold Fields (KGF) in South India, since the beginning of this century. A rockburst is characterised by a sudden collapse of excavated region because of void created during the mining operation. At large depths the problem of RB is quite severe which is a major hazard not only to mining workers, but also to property, both on surface and underground. In order to locate precisely the sources of RBs and also the blastings in the deep mines for investigation and assessment of stability of underground mine workings, current development in seismic recording technique has been used by establishing seismic network with 14 geophones and another microseismic network with 8 high frequency geophones at KGF These systems have been providing accurate information of the strata stability and enabled the mining engineers to assess the safety of mines more reliably. This paper summarises the details of monitoring set-up, analysis of data together with some recent results.


Authors: C. Srinivasan; NATIONAL INST OF ROCK MECHANICS GOLDFIELD (INDIA)

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CHAMPION REEFS

Champion Reefs is one of the main mining areas in the Kolar Gold Fields in India. The area is situated near Andersonpet in Kolar District. It has got in it the deepest mining shaft in Asia. Once again this place is named after a British officer called Champion. The Kolar Gold Fields is spread around 17 square kilometers and goes as down deep as 17,000 feet. The mines have been closed.


Champion reefs was once dominated by anglo indian foremen miners.


Reginald Gregory was the first chief miner who started the mining project at Champion Reefs, headed by taylor & Sons they soon were able to purchase other mines.


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