Safety supporting device for deep rock mass excavation and construction method thereof

Abstract

The invention discloses a safety supporting device for deep rock mass excavation, and belongs to the field of civil engineering, the safety supporting device comprises a protective outer shell, a plurality of supporting arms are arranged at the front end, located in the construction advancing direction, of the protective outer shell in a surrounding mode, and one end of each supporting arm is hinged to the inner side wall of the protective outer shell; a limiting block is arranged at the root position of the supporting arm in the protective outer shell so as to limit the supporting arm from being bent towards the interior of the protective outer shell; a plurality of small grouting pipes are arranged on the supporting arms, during construction, the supporting arms are unfolded beyond the outer side to form a cone, the front ends of the small grouting pipes are inserted into a rock mass, and the rear ends of the small grouting pipes are fixedly connected with the supporting arms. The supporting arm and the small grouting pipes are fixed together, so that if the rock mass suddenly bursts during rock mass construction, the supporting arm can be pushed to be bent towards the direction of the limiting block, the rock mass can be effectively prevented from entering the protective outer shell, and the safety of personnel in the protective outer shell is effectively guaranteed.

Description

technical field [0001] The invention relates to the field of civil engineering, in particular to a safety support device for deep rock mass excavation and a construction method thereof. Background technique [0002] Deep underground engineering involves fields such as mines, transportation, water conservancy and hydropower, deep geological disposal of nuclear waste, national strategic energy reserves, and national strategic protection projects, and is related to national security and people's livelihood. Underground engineering construction with a depth of more than 1,000 meters and the shock disturbance caused by the explosion form the characteristics of "one high and two disturbances" (high ground stress, excavation and unloading disturbance, and explosion shock disturbance) under the action of high ground stress. The characteristic scientific phenomena, such as zonal rupture, rockburst, ultra-low friction and pendulum wave, cannot be explained satisfactorily by the existi...

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Problems solved by technology

[0004] In the prior art, the occurrence of rockburst cannot be effectively reduced during construction, and the stability of the rock formation at the construction location cannot be well controlled, which makes it easy to cause danger during construction.

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