An Innovative Elastoplastic Analysis for Soft Surrounding Rock considering Supporting Opportunity Based on Drucker-Prager Strength Criterion

In order to study the mechanism of excavation and supporting process equivalent circular roadway, model soft roadway was established firstly. The elastoplastic solutions in were deduced based on Drucker-Prager strength criterion. Then, solution under condition obtained homogenization method rockbolts liner supporting. Lastly, an example analyzed effect different factors such as “space effect,” opportunity, stresses, surrounding displacement, radius plastic zone. Based theoretical research case, change rules considering effect” opportunity when calculating subarea discussed, control interval distance displacement rock mainly reflecting residual zone excavation, time not being ignored are revealed. results can provide important basis for stability evaluation quantitative support design rock. Therefore, stresses underground engineering.