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POST-CLOSURE SEISMICITY IN THE MINES OF KOLAR GOLD FIELDS

机译:高岭土金矿矿区关闭后的地震活动

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The occurrence of rockbursts in one of the deepest mines in the world, the deep gold mining region of the Kolar Gold Fields (KGF) in Southern India was closed in 1991. Following this, when deeper levels were inundated with water, increased number of seismic events were observed at two areas where Champion mine dyke and the Mysore North fault meet the water body. Apparently, the increasing quantity of water is tending to create a super hydrostatic fluid pressure gradient at that depth. The entire mine was closed during the year 2001 and significant seismic activity continued to occur. A noticeable rockburst with magnitude 2.8 occurred on November,2 2005 in the old and abandoned mines of KGF followed by series of seismic events. The rockburst was severe and the effect was felt by residents of adjoining areas and surrounding townships. The rockburst caused panic among people and it is reported that people came out of their houses. This paper documents the seismic activity that has occurred in this mine since closure of deeper levels and the entire mine and shows the relationships of the rate of seismic activity to the flooding within the mine.
机译:1991年,世界上最深的矿山之一,印度南部的可拉金矿田(KGF)的深金矿区,发生了岩爆事件。此后,当深层水淹没时,地震次数增加了。在冠军矿脉和迈索尔北部断层与水体交汇的两个区域观察到事件。显然,越来越多的水趋向于在该深度处产生超静液压压力梯度。整个矿山在2001年关闭,重大地震活动继续发生。 2005年11月2日,在KGF的老旧废弃矿山中发生了一次震级为2.8的明显岩爆,随后发生了一系列地震事件。岩爆很严重,邻近地区和周围乡镇的居民都感受到了这种影响。岩爆引起了人们的恐慌,据报道,人们从他们的房屋中出来。本文记录了自更深层和整个矿山关闭以来该矿山中发生的地震活动,并显示了地震活动速率与矿山内洪水的关系。

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