FEATURES OF THE EARTH'S SURFACE COLLAPSE OVER MINED-OUT SPACE OF BLIND ORE BODIES IN SOUTH-EASTERN SITE OF THE TASHTAGOL DEPOSIT
T. V. Lobanova
Siberian State Industrial University, Novokuznetsk, Russia
Keywords: Слепые рудные тела, земная поверхность, охраняемые объекты, параметры сдвижения, провал, массовые взрывы, Blind ore bodies, the Earth’s surface, protected objects, displacement parameters, pit, large-scale blasting
Abstract
The problem of exposure stability of blind ore bodies which are mined by the systems with a collapse of ores and enclosing rocks in difficult mining and geological conditions is considered. The results of monitoring the processes of displacement and deformation of the Earth’s surface over the mined-out space of blind ore bodies, where the protected objects are located, are presented. Anomalous parameters of vertical and horizontal displacements, high short-period movements during large-scale blasting were established. Particular attention is paid to the parameters of displacement of the Earth’s surface above the future pit before its formation, which were significantly lower than the criteria values. The factors which influenced the pit formation are analyzed.
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