Development of similar experimental prototype of the advanced support and the experimental study on its coupling mechanics with roof

Abstract

The size of advance support for mechanized mining roadway is large, therefore it is not easy to investigate its comprehensive dynamic characteristics and its coupled mechanical characteristics with surrounding rock in laboratory.According to the similarity theory, the similar experimental prototype of the support with a shrinkage ratio of 1∶8 was built.And a platform and measurement reference frame simulation of roadway roof were established.An experimental mechanics test was conducted on the advance support and roof coupling system to measure the deformation of roof and support beam and stress with support and without support, and with static loading and dynamic loading.Finally the experimental modal analysis was conducted on the model prototype, and the first 6 order natural frequency and modal shape of each order were measured.It is good to save equipment development cost and improve the quality of equipment through building the prototype and the experimental platform with the limited laboratory conditions for doing static and dynamic experiments and tests based on the similarity theory.