IMPROVEMENT OF UNDERGROUND MINING OF SOKOLOVSKOE DEPOSIT BY SYSTEMS WITH CAVING UNDER CONDITIONS OF WATERED OVERLYING ROCKS
DOI:
https://doi.org/10.25635/2313-1586.2019.01.005Keywords:
underground mining, systems with caving, rock mass, stress-deformed state, current geodynamic movements, structural framework, hierarchical blocking, sudden breakthroughs of water-saturated rocks, underground mines, rock pressure managementAbstract
The paper presents the solution of the actual problem of
ensuring the safety of the underground mining of Sokolovskoe iron ore deposit from the risk of emergency
breakthroughs of water and mud masses into underground
mines using the system of induced level caving with bottom ore drawing under the conditions of presence of the overburden of watered unconsolidated deposits. Subject to the results of field instrumental studies of the stress deformed state of the rock mass containing the ore deposit, we have developed a hydro-geomechanical model of the deposit, representing the tectonic structure and geodynamic activity of ore and rock mass where we have
taken into account all the most significant factors and features of current geodynamics in the unconsolidated
water-saturated sediments and on the earth surface. On
the basis of the hydro-geomechanical model, we have made the technological solutions for the improvement of
the underground mining of the Sokolovskoe deposit to
minimize the risk of emergency breakthroughs of the argillo-arenaceous deposits into the underground mines.
We have proposed a two-stage system of induced level caving with breaking the ore by compensating chambers
with uniform-sequential bottom ore drawing within the
entire block at the area of not less than 4000 m2 with the
formation of inclined border "broken ore-overlying rocks".
