A Flexible Capsule for Loading in Deep Rock Mass Simulation Test

Abstract

The invention discloses a flexible capsule for deep rock mass simulation test loading. A sealing channel embedded in the flexible capsule is made of a steel cylinder, the end, embedded in the flexible capsule, of the steel cylinder is sealed by a steel circular plate, the other end of the steel cylinder is open, and the steel circular plate is screwed into the sealed end of the steel cylinder from the open end of the steel cylinder through a thread on the inner wall of the steel cylinder till the outer surface of the steel circular plate is flush with the end face of the sealed end of the steel cylinder; two circles of annular bosses, namely the outer annular boss and the inner annular boss are further arranged on the outer side of the sealed end of the steel cylinder, the annular bosses are fixedly connected with the flexible capsule through vulcanization sealing, and the end face of the outer annular boss and the end face of the sealed end of the steel cylinder are flush with the side face of the flexible capsule. The sealing channel is prearranged in the flexible capsule through vulcanization fixed sealing, so that the problem of sealing of the flexible capsule at the position of an excavation opening is solved and uniform test specimen boundary loading is achieved.

Description

technical field [0001] The invention relates to the technical field of deep rock mass explosion simulation tests, in particular to a flexible capsule used for loading in deep rock mass simulation tests. Background technique [0002] At present, my country's transportation, water conservancy and hydropower, energy, mining and military protection engineering construction are rapidly developing deep underground, and the simulation study of deep engineering excavation construction in the laboratory has gradually become a current research hotspot. At present, domestic scholars have designed a variety of simulation test instruments, and hydraulic jacks and flexible capsules are long-term static load application methods. When hydraulic jacks are used to apply ground stress, the excavation channel is selected in the gap between the jacks. This simulation method is expensive, and the boundary stress distribution of the specimen is uneven due to the gap between the jack arrays. The u...

AI Technical Summary

Problems solved by technology

When hydraulic jacks are used to apply ground stress, the excavation channel is selected in the gap between the jacks. This simulation method is expensive, and due to the gap between the jack arrays, the boundary stress distribution of the specimen is uneven.

The use of flexible capsules solves the problem of uneven boundaries of the specimens. However, since the flexible capsule is an integrally sealed structure, how to apply active loads on the excavation surface poses a problem for simulating engineering excavation.

Images