Coal-mining roadway scour-preventing and energy-absorbing combined metal support and assembly method

Abstract

The invention discloses a coal-mining roadway scour-preventing and energy-absorbing combined metal support and an assembly method, and belongs to the field of coal mine safety supporting. The device comprises an outer round steel support, an inner round steel support and energy-absorbing support devices. The metal support and the assembly method are based on the supporting idea of quick energy absorbing abdicating for scour preventing, reasonable round roadway cross-section supporting is adopted, two retractable big and small metal rings form a main framework, and special distributed connecting devices are key energy-absorbing members, so that a combined metal support structure with double protection functions is formed. When unexpected large shock, deformation or burst of surrounding rocks occurs, a rapid and controllable deformation abdication process is realized through effectively match between the inner and outer rings and the energy-absorbing devices, impact energy of the surrounding rocks can be absorbed to the utmost and dissipated simultaneously, buckling failure of an overall support structure and a roadway surrounding rock system is avoided, and staff and production equipment in a roadway are prevented from being injured or damaged.

Description

technical field [0001] The invention belongs to the field of coal mine safety support, and in particular relates to an anti-shock energy-absorbing combined metal bracket of a coal mining roadway and an assembly method thereof. Background technique [0002] Rock burst is a complex physical and mechanical process. It has been studied for nearly a hundred years at home and abroad, and it is still a difficult problem in the fields of mining engineering and rock mechanics. At present, the following two measures are mainly adopted in the support method to reduce the damage degree of the impact accident: first, the overall stability of the surrounding rock is improved by enhancing the strength of the surrounding rock itself; Improve the bearing capacity of the support structure. For example, anchor bolts and cables, anchor nets, shotcrete, steel bracket support, shed-cable coordinated support, and hydraulic support (column) support, etc., all increase the strength of the support b...

AI Technical Summary

Problems solved by technology

However, when the surrounding rock is suddenly impacted, the U-shaped steel will show some defects, for example: the U-shaped steel has poor toughness and often breaks locally; the screws of the clamped cables at the joints break and the clips collapse; the whole is severely deformed or collapsed ;The support method of O-shaped shed belongs to single-layer protection. Once restrained deformation or overall collapse occurs, the internal staff and equipment will be exposed to danger.

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