Stress State of Korobkov Iron Ore Field in the Zone of Tectonic Fractures
G. G. KOCHARYAN1, S. R. ZOLOTUKHIN2, E. V. KALININ3, L. L. PANAS’YAN3, V. G. SPUNGIN1
1Institute of Geosphere Dynamics, Russian Academy of Sciences, Leninskii pr. 38, Bld. 1, Moscow, 119334 Russia
2KMAruda, ul. Artema 2, Gubkin, Belgorod Region, 309510 Russia
3Lomonosov Moscow State Mining University, Leninskie gory 1, Moscow, 119991 Russia
Keywords: массив горных пород, зоны разломов, подземная разработка, железорудное месторождение, литостатические напряжения, аналитические расчеты, натурные измерения, rock mass, fractured zone, underground mining, iron ore deposit, lithostatic stresses, analytical calculations, in-situ measurements
Abstract
The actual lithostatic stresses are calculated with regard to physical characteristics and structural features of rock mass. The results are compared with the in-situ observations. It is shown that vertical stresses naturally grow with depth though their values are very different along horizontal cross sections due to the complex structure of rock mass. On the average, the vertical stresses are close in values to the lithostatic stresses. The horizontal stresses measured by the borehole slotter method are many times higher than their calculated values, which is governed by the nonunform properties of rocks or is reflective of tectonic compression.
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