Design method of working face length of continuous separation grouting and filling mining without coal pillar

By systematically designing the length of the continuous delamination grouting and filling mining face without coal pillars, the problem of inaccurate design in existing technologies has been solved, achieving a balance between rock strata stability and production efficiency, and improving coal resource recovery rate and safety.

CN121457070BActive Publication Date: 2026-06-09SHANDONG UNIV OF SCI & TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
SHANDONG UNIV OF SCI & TECH
Filing Date
2025-09-26
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

Under the condition of continuous segregation grouting and backfilling mining without coal pillars, existing technologies cannot directly and accurately design the length of the next working face, making it difficult to balance the safety and production efficiency of the coal mining face.

Method used

By determining factors such as the width of the uncompacted zone on both sides of the mined working face, the breakage distance of the key grouting layer, the designed production capacity of the working face, the ventilation capacity, and the support strength, the length of the continuous separation grouting and filling mining working face without coal pillars is systematically designed, including calculation formulas and verification steps, to ensure the matching of rock strata stability and production efficiency.

Benefits of technology

It enables precise design of the working face length in continuous delamination grouting and backfilling mining without coal pillars, ensuring the stability of the rock strata and production efficiency, reducing equipment failure and safety risks, and improving coal resource recovery rate and production efficiency.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application discloses a coal pillar-free continuous separation layer grouting filling mining working face length design method, and specifically comprises the following steps: firstly, determining the basic parameters of the coal pillar-free continuous separation layer grouting filling mining working face length design; secondly, determining the design length of the coal pillar-free continuous separation layer grouting filling mining working face; thirdly, checking the design length of the coal pillar-free continuous separation layer grouting filling mining working face; and finally, determining and optimizing the length of the coal pillar-free continuous separation layer grouting filling mining working face. The application provides a direct and systematic working face length design scheme for the coal pillar-free continuous separation layer grouting filling mining conditions, takes into account the safety and economy of coal mining, ensures that the length of the coal pillar-free continuous separation layer grouting filling mining working face does not exceed the breaking distance of the key grouting layer, and meets the working face design production capacity, ventilation capacity and support strength, effectively prevents roof accidents and ventilation problems, improves the recovery rate of coal resources, and is beneficial to safe and efficient mining of the working face.
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