Research on the deformation mechanism and test technology of soft rock roadway

Roadway support has the most effect on the coal mine production, moreover, the soft roadway control is still the new field for probing into.In order to make the support scheme and parameter optimum and efficiency, in this paper, on the base of research distortion characteristic of soft rock entries, advancing suitable several holes method in testing distortion characteristic shallow or deep surrounding rock mass.Non-linear deformation and break mechanism was analyzed with damage mechanics, unload mechanics, structure mechanics in vary point of view, and the main purpose is to study the formation, deformation and breach characteristic in shallow fragmentation circle and deep plastic circle.According to the deformation and damage characteristic of roadway in vary phase, the paper thought that the first support system aim is to prevent the forming of shallow fragmentation circle and the second is to stop continuous deformation of deep plastic circle in due course.This paper’s idea was fully validated in west entry supporting system and obtained preferable result in DuerPing mine.