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

Support of deep roadway has the most effect on the coal mine production, moreover, the deep soft roadway control is still the new field for probing into, there are many problems for using the theory of thinner overburden roadway to control deep roadway, especially for the soft and great flow distortion deep roadway. In order to make the support 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 of 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 fragment zone and deep plastic zone. 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 zone and the second is to stop continuous deformation of deep plastic zone in due course. This paper's idea was fully validated in west entry supporting system and obtained preferable result in SUNCun Mine.