Determination of Rock Mechnics Parameters Based on the Hoek-Brown Method

摘要

Determination of rock mass mechanics parameters in numerical simulation is very important,introducing the basic principle of M.G eorgi method and Hoek Brown method that determining the mechanical parameters of rock mass,setting determination of rock mass mechanical parameters of lead-zinc deposit in Dongsheng miao research as a research example,based on the physical and mechanical parameters of rock specimens which were got by indoor laboratory test,and considering the effect of rock joints and fissures,and eventually determining rock mechanics parameters.Building the mine pillar recovery mode by use of FLAC numerical simulation software,putting rock mechanics parameters determined by two methods into the software to simulate on displacement,which simulating and monitoring No.8 pillar in 850 column,mined-out area in 900 column and roof in 980 column of No.2 ore body on subsidence displacement monitoring,and carry out microseismic monitoring in the corresponding position,and extracting and analyzing the monitoring data,the comparison analysis shows that the rock mass mechanics parameters determined by Hoek Brown method is more in line with the actual,which can be used as the basis data of numerical simulation on the mine pillar recovery,guiding the mine safety production.