Support structure and method for soft rock roadway or tunnel bottom drum treatment based on reinforced concrete bottom beam

Abstract

The invention relates to treating and supporting structure and method of a soft rock roadway (tunnel) heaving floor based on a reinforced concrete bottom beam. The structure comprises a steel supportand a reinforced concrete bottom beam, the steel support adopts a full-section supporting structure, and the reinforced concrete bottom beam is embedded into a bottom plate of the soft rock roadway (tunnel); the inverted arch of at least one steel support is poured into the reinforced concrete bottom beam, and two steel bar layers are arranged on the upper and lower surfaces of the bottom beam. The supporting structure adopts a special reinforcing supporting technology by utilizing the bracket with high bearing capacity to cooperate with the bottom plate, is simple in construction and low in cost, not only strengthens the supporting force of the bottom plate and inhibits the deformation of the bottom plate, but also optimizes whole supporting of the roadway, can effectively solve the problem of the roadway (tunnel) heaving floor, and reduces the repair rate of the roadway (tunnel).

Description

technical field [0001] The invention belongs to the field of underground engineering support, and in particular relates to a soft rock roadway or tunnel bottom drum treatment support structure and method based on reinforced concrete bottom beams. Background technique [0002] At present, most coal mines in my country have entered the stage of deep mining. It is difficult to support and stabilize the roadways excavated under complex geological conditions such as deep soft rock, faults, and high ground stress. The problem of roadway surrounding rock control and management is increasingly apparent. The problem of governance is particularly prominent. The lack of support or weak support in the middle floor of the coal mine roadway makes it a weak link in the roadway support, which causes the stress release of the surrounding rock and the deformation of the roadway to appear first on the bottom plate, forming a bottom heave phenomenon, which further causes roadway damage. Overall d...

AI Technical Summary

Problems solved by technology

[0002] At present, most coal mines in my country have entered the stage of deep mining. It is difficult to support and stabilize the roadways excavated under complex geological conditions such as deep soft rock, faults, and high ground stress. The problem of roadway surrounding rock control and management is increasingly apparent. The problem of governance is particularly prominent. The lack of support or weak support in the middle floor of the coal mine roadway makes it a weak link in the roadway support, which causes the stress release of the surrounding rock and the deformation of the roadway to appear first on the bottom plate, forming a bottom heave phenomenon, which further causes roadway damage. Overall deformation and failure

Images