Efficiency evaluation of destressing drilling by numerical and physical modeling toward rockburst nonhazardous conditions in mines

Abstract

The article puts forward and describes an integrated numerical/physical modeling procedure to improve evaluation efficiency of destressing drilling aimed at creating rockburst unhazardous conditions in underground openings. When rocks in the interwall space reaches the limit state under the action of rock pressure, the zones of stress concentration displace from the boundary of an underground opening into the depth of rock mass. As a result of the proposed activity implemented in underground mines of Apatit's Division in Kirovsk, the risk of an underground rock burst was reduced essentially