Asynchronous rib spalling control device of isolated coal pillar composite type coal wall

Abstract

The invention discloses an asynchronous rib spalling control device of an isolated coal pillar composite type coal wall. Axial hydraulic support and radial hydraulic support are adopted in a hinged position of a hydraulic bracket, and a hinged shaft can be effectively protected; meanwhile, a cross-shaped rotary seat is adopted for hinge joint, radial support and axial support are facilitated, thehinged force condition can be effectively improved, and the stability of support is guaranteed; and meanwhile, during asynchronous rib spalling control, fine adjustment can be carried out on a supporting angle of a rib spalling protection plate by using a hydraulic supporting control mechanism, during fine adjustment, due to the control of hydraulic supporting force, stable micro adjustment can beeffectively realized, the adjustment is stable and reliable, the uncontrolled condition of angle adjustment cannot occur, and asynchronous rib spalling control over the isolated coal pillar compositetype coal wall is adapted; and the angle of the rib spalling protection plate can be adjusted to be suitable for the coal walls with different angles.

Description

technical field [0001] The invention relates to the technical field of coal mining equipment, in particular to a non-synchronous edge control device for an isolated island coal pillar composite coal wall. Background technique [0002] During the production process of the mine, with the continuous mining of the working face in the mining area, when the mining of the whole mining area is completed, the coal pillars of the upper and lower hills and islands in the mining area will inevitably be left. Therefore, for the composite coal wall of the island coal pillar, the control of its side is very important. [0003] While the current support devices use anchor rods and anchor cables for anchoring, coal walls and roofs generally use hydraulic supports for auxiliary support. Since the hydraulic supports are generally hinged to form a frame structure, this frame structure is subject to great pressure. When the supporting force is applied, the hinged shaft or hinged column at the h...

AI Technical Summary

Problems solved by technology

[0003] While the current support devices use anchor rods and anchor cables for anchoring, coal walls and roofs generally use hydraulic supports for auxiliary support. Since the hydraulic supports are generally hinged to form a frame structure, this frame structure is subject to great pressure. When the supporting force is applied, the hinged shaft or hinged column at the hinge is the most fragile, and it is easy to concentrate the force due to the incorrect angle, break the hinged shaft or hinged column, and easily cause the problem of hydraulic support support failure. Moreover, this When this kind of hydraulic support controls the non-synchronous side, it is necessary to fine-tune the angle of the support according to the support situation. However, the current common articulation method is prone to unstable state during fine-tuning, which affects the non-synchronous Stability of synchronous edge control

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