Stability intelligent control method for multi-stress field coupling surrounding rock of working surface with super large mining height

Abstract

The invention discloses a stability intelligent control method for a surrounding rock with a super large mining height. The instability intelligent control method is characterized in that a support stress field produced by a stability intelligent support unit is superposed with an instability mining stress field which is formed by large-scale and high-strength movement of the surrounding rock of a working surface with the super large mining height; the relative balance with mining stress is reached on a top plate of the working surface and the coal wall; the support stress field is determined by a top plate sinking and coal wall horizontal displacement double-factor control method, and a side protection stress field is determined by a side falling strategy for preventing the destroying-slip of the coal wall; a mapping base is established for the parameter change of pressure, attitude and the like of the intelligent support unit and the pressure of the top plate; the intelligent support unit is used for sensing the attitude and pressure of an internal hydraulic bracket with a super large mining height, and signals of a stress monitoring device in the surrounding rock through an intelligent control terminal; after comprehensive analysis and treatment, a surrounding rock stability intelligent control center can request a hydraulic bracket electric-hydraulic control system to send out control and early warning instructions. The instability intelligent control method has the advantage that the stability of the surrounding rock of the working surface with the super large mining height and the intelligence level of equipment are greatly improved.

Description

technical field [0001] The invention relates to a method for controlling the stability of surrounding rock in a coal mining face, in particular to an intelligent control method for the stability of surrounding rock in consideration of the multi-stress field coupling effect of a super-large mining height working face. Background technique [0002] The fully mechanized mining face is a mechanized mining face composed of hydraulic supports, shearers and scraper conveyors, in which the hydraulic supports support the roof and floor, control the coal wall, and provide a safe working space for shearers, scraper conveyors and pedestrians And pushing the equipment forward of the working face is the key equipment guarantee for the stability control of the surrounding rock in the coal mining process. Underground engineering activities such as coal mining cause the redistribution of original stress, and the resulting stress distribution is called the mining stress field. At present, th...

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Problems solved by technology

[0005] Technical problem: The present invention proposes a surrounding rock stability control method based on the multi-stress field coupling effect, aiming at the difficult problems of controlling the stability of the surrounding rock such as the large deformation of the roof of the fully mechanized mining face with super large mining height, strong impact and frequent coal walls. Using the intelligent support function of the hydraulic support to solve the problem of safety guarantee for the mining operation space of the ultra-large mining height working face

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