Deformation characteristics of surrounding rock of broken and soft rock roadway

A similar material model and a numerical simulation were constructed and are described herein. The deformation and failure of surrounding rock of broken and soft roadway are studied by using these models. The deformation of the roof and floor, the relative deformation of the two sides and the deformation of the deep surrounding rock are predicted using the model. Measurements in a working mine are compared to the results of the models. The results show that the surrounding rock shows clear theological features under high stress conditions. Deformation is unequally distributed across the whole section. The surrounding rock exhibited three deformation stages： displacement caused by stress concentration, theological displacement after the digging effects had stabilized and displacement caused by supporting pressure of the roadway. Floor heave was serious, accounting for 65% of the total deformation of the roof and floor. Floor heave is the main reason for failure of the surrounding rock. The reasons for deformation of the surrounding rock are discussed based on the similar material and numerical simulations.

基于工程教育专业认证下的课程改革探索——以资源勘查工程专业地球化学为例

随着资源勘查与环境保护工作的不断深入,对地球化学课程也需要进一步的探索与改革。首先,对工程教育专业认证的背景进行了简要概述。其次,分析了工程教育专业认证背景下资源勘查工程专业地球化学课程的教学现状与不足。针对这些现状与问题,从学生、教师以及学校角度出发,提出了相应措施。