Yielding type special-shaped beam anchor rope truss roadway support system

Abstract

The invention relates to a yielding type special-shaped beam anchor rope truss roadway support system. A metal net is laid on the surface of the roadway. A yielding type special-shaped beam anchor rope truss is arranged on the coal rock roof or roadside. The yielding type special-shaped beam anchor rope truss comprises special-shaped beams, a yielding device and anchor ropes or anchor rods, wherein each special-shaped beam is provided with a plurality of anchor ropes or anchor rods; the anchor ropes or anchor rods penetrate through the special-shaped beams and the metal net and are anchored into rock layers; and outer anchoring ends of the anchor ropes and anchor rods are provided with the yielding device and a tray for letting the end tips of the anchor ropes and anchor rods to be in contact with the special-shaped beams and exerting yielding action. The yielding type special-shaped beam anchor rope truss roadway support system has the advantages of large surface protecting area and high rigidity and is not easy to become unstable; steel is saved, cost is reduced, and efficiency is improved; strength is high, the performance adjustment space of an entire support is great; and the yielding device plays the action of effective yielding, and coupling yielding support ensures the stability and safety of the entire support system.

Description

technical field [0001] The invention relates to the field of mine roadway support, in particular to a pressure relief special-shaped beam anchor cable truss roadway support system. Background technique [0002] Coal mine roadway support technology is a key technology in coal mining. Maintaining the stability of the surrounding rock and preventing excessive deformation and damage of the roadway is a necessary condition for safe and efficient mine production. With the development of the depth and breadth of the mine, the problem of roadway support becomes more and more prominent. [0003] At present, the bolting technology of coal roadway is becoming more and more mature, and the range of bolting has been gradually applied from the surrounding rocks of grades I, II and III to the surrounding rocks of grades IV and V. However, under these complex conditions, especially for deep, high-in-situ stress and long-span roadways, the deformation of the roadway roof separation layer i...

AI Technical Summary

Problems solved by technology

However, under these complex conditions, especially for deep, high-in-situ stress and long-span roadways, the deformation of the roadway roof separation layer is particularly serious, and the current use of bolts and cables alone cannot effectively support the roof. In addition, due to the high stress, the side of the coal seam roadway is also deformed greatly, which often causes the roadway to shrink and deform, making the roadway unusable

Especially for gob-side entry, the currently used high-performance bolt combination support technology is also powerless

The deformation of the side of the roadway, especially the side of the coal pillar, has obvious deformation at the beginning of the roadway excavation. In the mining stage, the deformation usually reaches more than 70% of the total deformation, and the section shrinks by nearly 2 / 3. The roadway cannot be used. even cause safety accidents

Many working faces have to stop production to renovate the roadway or dig another roadway. Not only the support cost is high, the driving speed is low, but also many safety hazards are brought, which seriously restricts the rapid advancement of the coal mining face and the improvement of mine production and efficiency.

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