关键词: 巷道掘进, 临时支护, 支架, 静力学特性, 变刚度

Abstract: Aiming at the low construction efficiency of the traditional roadway support method, which limits the tunneling efficiency, a new type of support bracket is designed. The three-dimensional assembly model was established by Solid Works, and the static load characteristics of the temporary support bracket were analyzed by ANSYS Workbench software using the two loading methods of internal loading and intermediate external loading for the bracket. The results show that the deformation of the bracket in the case of intermediate external loading is 10.27 times of that of internal loading, and the stress and strain are 2.14 and 2.13 times of that of internal loading, respectively; the deformation of the bracket in the case of internal loading mainly concentrates in the vicinity of the articulation point of the cover frame and the counterbalance jacks, whereas the deformation of the bracket in the case of intermediate external loading mainly concentrates in the front end of the upper beam frame; the stress and strain of the bracket in the case of internal loading mainly appear in the hinged point of the upper beam frame and the supporting jacks. In the case of internal loading, the stress and strain of the bracket mainly appeared in the articulated lugs of the upper beam frame and the supporting jacks, and the articulated lugs of the cover frame and the balancing jacks, whereas the stress and strain of the bracket in the case of intermediate external loading mainly appeared in the contact area between the loading plate and the upper beam frame, and the cover frame and the front connecting rod also had more obvious stress and strain; By choosing the right material, the bracket can be made highly reliable in both loading methods..