Analytical Description of Surface of Blasting-Formed Underground Cavities by Laser Scanning Data
V. N. OPARIN1,2, V. F. YUSHKIN1, V. K. KLIMKO3, D. E. RUBLEV1, A. S. IZOTOV1, A. V. IVANOV4
1Chinakal Institute of Mining, Siberian Branch, Russian Academy of Sciences, Krasny prospect 54, Novosibirsk, 630091 Russia
2Novosibirsk State University, ul. Pirogiva 2, Novosibirsk, 630090 Russia
3EVRAZRUDA, ul. Lenina 21, Tashtagol, 652970 Russia
4Siberian State University of Geosystems and Technologies, ul. Plakhotnogo 10, Novosibirsk, 630108 Russia
Keywords: рудный массив, вид напряженного состояния, взрыв зарядов, подземная камера, лазерное сканирование, формы поверхности камеры, блочно-иерархическое строение, метод аналитического описания, эффект зональной дезинтеграции, ore body, stress state types, charge explosion, underground cavity, laser scanning, cavity surface form, hierarchical block structure, analytical description, zonal disintegration
Abstract
In terms of Tashtagol Mine, the authors address the issues connected with the determination of surface shape in cavities formed by blasts of explosive charges in high-stress rock mass structured as a hierarchy of blocks. Laser scanning of a cavity offers the data on linear and angular characteristics of the cavity surface. The analysis of the surface structure provides details of the rock mass block hierarchy, which essentially influences formation of the roof and sidewalls of the cavity. Individual areas of the cavity surface are described with the help of approximation of measured coordinates of the cavity boundary in the cross sections using the second order curves, including circumferences and ellipses the radius of which are canonically connected with the phenomenon of zonal disintegration of rock mass.
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