Energy-absorption and impact-prevention supporting and protecting device for combined type circular tunnel

Abstract

The invention discloses an energy-absorption and impact-prevention supporting and protecting device for a combined type circular tunnel, belongs to the field of coal mine tunnel supporting technologies and is mainly applied to an energy-absorption and impact-prevention supporting and protecting device for impact ground pressure of a deep coal mine. According to the energy-absorption and impact-prevention supporting and protecting device, energy-absorption anchor rods are coupled with surrounding rocks of the tunnel to form a whole, so that the supporting and protecting strength of the surrounding rocks of the tunnel is improved, and the problem of overlarge pressure caused by rheology of the surrounding rocks of the tunnel is solved. The energy-absorption and impact-prevention supporting and protecting device comprises arc frames, wherein the adjacent arc frames are connected with each other through an energy-absorption connection rod; the arc frames consist of outer ring plates, energy-absorption cushion blocks and inner ring plates; two ends of the inner ring plates and two ends of the outer ring plates are connected through clamps; the energy-absorption cushion blocks consist of energy-absorption outer barrels and energy-absorption plates; the energy-absorption connection rods comprise hydraulic cylinders; left hinge lifting ring heads are fixed at the bottom ends of the hydraulic cylinders; pistons are arranged in the hydraulic cylinders; liquid injection holes are formed in the side walls of the hydraulic cylinders; cylinder covers are fixed at the right ends of the hydraulic cylinders; the left ends of supporting columns are connected with the pistons; the right ends of the supporting columns are arranged in the left ends of energy-absorption barrels; right hinge lifting ring heads are fixed at the bottom ends of the energy-absorption barrels.

Description

technical field [0001] The invention belongs to the technical field of coal mine roadway support, and in particular relates to a composite circular roadway energy-absorbing and anti-scour support device, which is mainly applied to the energy-absorbing and anti-scour support device for rock burst in deep coal mines. Background technique [0002] With the increase of my country's energy demand and the depletion of shallow coal resources, the excavation depth of coal mines is deepening day by day. Some mines in eastern my country have entered the deep mining stage, and mines thousands of meters deep are not uncommon. In deep mines, the burial depth is large, the original rock stress is large, and the surrounding rock of the roadway deforms greatly under high ground stress. In addition, the mining intensity of modern mining equipment is improved, and the frequency and intensity of rock burst in deep mines increase. The roadway support device is required to have Energy-absorbing ...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the present invention provides a composite circular roadway energy-absorbing and anti-scour support device, which is integrated with the surrounding rock of the roadway through energy-absorbing bolts, which improves the protection against the surrounding rock of the roadway. Support strength, use the energy-absorbing pad to absorb the impact energy during impact, and use the energy-absorbing connecting rod to shrink and relieve pressure to solve the problem of excessive pressure caused by the rheology of the surrounding rock in the roadway. Through the hinged energy-absorbing connecting rod and energy-absorbing connection The hydraulic system of the series connection of the rods enables the support device to have an automatic adjustment function to prevent local excessive force

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