METHOD OF CONTROLLING ROCK PRESSURE DURING UNDERGROUND DEVELOPMENT OF HORIZONTAL AND INCLINED LENTICULAR ORE DEPOSITS Russian patent published in 2016 - IPC E21C41/22 

FIELD: mining.

SUBSTANCE: invention is used for rock pressure control during underground development of horizontal and inclined lenticular ore deposits. Method involves development of preparatory access workings and slopes, development of primary chambers with trapezoidal cross-section in central, most powerful, part of lenticular ore deposit and their filling with hardening mixture with formation of artificial pillars and leaving massive ore pillar between them with width in upper part, numerically equal to allowable stairs L of mined space. Pass mounting opening and an additional mounting opening in parallel to axis of symmetry of massive ore pillar at a distance of one-third of allowable flight L of mined space one from another and connection thereof by breakthrough via contact with lenticular ore deposit. Redistribution of rock pressure on artificial pillars is performed by layered development of reserves of massive ore pillar with explosive ore wells throughout its width with drilling and short-delay blasting of explosive ore wells during one reception first in artificial pillars, and then in central part of massive ore pillar. Caving of overlying rocks within range of natural balance is carried out with inclined rock layers with drilling and blasting of explosive rock wells at height of natural balance, wherein blasting explosive rock wells is performed with deceleration, starting from nearest to artificial pillars and ending with explosive rock wells forming breakthrough in contact with lenticular ore deposit in following inclined rock layer.

EFFECT: reduced probability of dynamic manifestations of rock pressure, making it possible to arrange spare outputs, improved conditions of ventilation.

3 cl, 6 dwg