METHOD FOR PREDICTING STABILITY OF SHELVES OF QUARRY SIDES Russian patent published in 2007 - IPC E21C41/26 

FIELD: mining industry, possible use during extraction of coal, ore and non-ore deposits by open method.

SUBSTANCE: in accordance to method, geological structure of massif is analyzed, position of potential sliding surface is detected, physical and mechanical properties of rocks are determined. Along profile parallel to edge of shelf in its middle portion, frequency of alternation of impulses of natural electromagnetic radiation is measured. On intervals where this frequency exceeds level of background radiation more than 2 times, interval-wise measurement of relation of strength level of signal electric field at two working frequencies is performed. By means of computed logarithmic dependence, depth of location of potential sliding surface is determined. With consideration of change of this depth, structure of massif, technological parameters and physical-mechanical properties of rocks, values of stability reserve coefficients are calculated on basis of ratio of momentums of holding and moving forces within limits of detected dangerous portion. Probability of landslide development is evaluated on basis of minimal values of stability reserve coefficients.

EFFECT: increased precision when predicting stability of quarry sides.

2 cl, 1 ex, 1 tbl, 4 dwg