采矿与安全工程学报Issue(1)：132-137,6.DOI:10.13545/j.cnki.jmse.2015.01.021
考虑围压影响的岩石弹脆塑力学模型
Elastic-brittle-plastic mechanical model for rock with confining pressure
摘要
Abstract
To model effects of confining pressure on the post-peak mechanical properties for rock such as the degradation of strength and modulus, and dilatancy, the deformation process is simplified into three phases including linear-elastic, brittle degradation and perfect plasticity. Degradation index and dilatancy index are employed to reflect the effects of confining pressure on the peak-post mechanical properties for rock in this paper, and an elastic-brittle-plastic model with confining pressure is presented. Based on the transformation relationship between Hoek-Brown failure criterion and Mohr-Column fail-ure criterion, how to obtain the calculation parameters of the peak-post mechanical model in this paper is presented. The Fish function method within FLAC is adopted to realize the elastic-brittle-plastic me-chanical model model in this paper. In numerical case study the peak-post mechanical properties of rock under varied confining pressure including the degradation of strength and modulus, and dilatancy are modelled. The results show that the model can perfectly describe the deformation process and the effects of confining pressure on peak-post mechanical properties of rock.关键词
围压/弹脆塑力学模型/Hoek-Brown屈服准则/Mohr-Column屈服准则Key words
confining stress/elastic-brittle-plastic mechanical model/Hoek-Brown failure criterion/Mohr-Column failure criterion分类
矿业与冶金引用本文复制引用
张春会,徐晓攀,王锡朝,赵全胜..考虑围压影响的岩石弹脆塑力学模型[J].采矿与安全工程学报,2015,(1):132-137,6.基金项目
国家自然科学基金项目(51274079)；河北省自然科学基金项目(E2013208148)；河北科技大学理工学院项目(2012Z035) （51274079）
