METHOD OF CONDUCTING DRILLING AND BLASTING OPERATIONS WITH SHIELDING Russian patent published in 2017 - IPC F42D3/04 E02D27/34 

FIELD: blasting.

SUBSTANCE: method of conducting drilling and blasting operations with shielding includes the preliminary creation of a seismic-shielding gap by blasting explosive charges placed in wells. Prior to the commencement of drilling and blasting operations on the quarry, at least two non-overlapping, non-parallel seismic-shielding gaps are created that are located outside the open-pit field between the open-pit field and the protected object. One of the seismic-shielding slots is perpendicular to the line connecting the centers of protected object and open-pit field. The lengths of the seismic-shielding gaps are chosen so that all seismic-shielding gaps overlap the protected object while observing the protected object from any point of the field. Wells that form seismical-shielding gaps are drilled vertically.

EFFECT: invention makes it possible to reduce the amount of work to create seismical-shielding gaps, increase the length of seismic-shielding gaps in working condition and increase the safety of drilling and blasting operations with shielding.

2 dwg