A local-global decoupling pushing and straightening method for an ultra-long working face hydraulic support group

By using a local-global decoupled straightening method, the displacement data of the hydraulic support is decomposed, the deviation index is calculated, and the correction amount is adaptively generated. This solves the problem of low efficiency in straightening of hydraulic supports in ultra-long working faces and achieves more efficient and safer support straightening.

CN122543779APending Publication Date: 2026-08-11CCTEG COAL MINING RES INST
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Patent Information

Application Number
CN202611047714.7
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-07-15
Publication Date
2026-08-11

AI Technical Summary

Technical Problem

In ultra-long working faces, the efficiency of hydraulic support pushing and straightening is low, and there are inconsistencies in scheduling and safety hazards during the straightening process. Existing technologies are difficult to effectively solve the complex deviation problems caused by the large number of supports and the long pushing link.

Method used

A local-global decoupled push-and-straighten method is adopted. By collecting the push-and-displacement data of the hydraulic support, it is decomposed into global low-frequency components and local high-frequency components. The corresponding deviation index is calculated, and the correction amount is adaptively generated according to the weight to control the push-and-displacement action of the hydraulic support to maintain the straightness of the working surface.

Benefits of technology

It improves the stability and repeatability of straightness of ultra-long working surfaces, avoids over-correction or under-correction, and significantly improves straightening efficiency and safety.

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Abstract

This disclosure relates to a method for decoupling and straightening the hydraulic support group in an ultra-long working face, specifically in the field of coal mining technology. The method includes: collecting the displacement data of multiple hydraulic supports corresponding to the working face to obtain a displacement sequence; decomposing the displacement sequence into global low-frequency components and local high-frequency components; calculating a local consistency deviation index based on the local high-frequency components, and calculating a global trajectory deviation index based on the global low-frequency components and the design displacement benchmark; determining local and global correction weights based on the local consistency deviation index and the global trajectory deviation index; generating a local displacement correction amount based on the local high-frequency components, generating a global displacement correction amount, and merging the local and global displacement correction amounts into a target displacement correction amount; and controlling each hydraulic support to perform a pushing action based on the target displacement correction amount to maintain the straightness of the working face. This disclosure improves the stability and control efficiency of maintaining the straightness of ultra-long working faces.
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