DOI: 10.11799/ce202502018
Zoning law and sectional control of mine pressure in advance roadway of working face
ZHANG Chunlei
LIU Yonghong
YANG Liang
GUO Xiaofei
ZHONG Jingui
ZHANG Zhen
Abstract：In order to explore the evolution law of surrounding rock failure in advance roadway of working face,the distribution characteristics of mining stress field in advance area of working face were studied through theoretical analysis and numerical simulation.The key findings reveal that:①High deviatoric stress is the main cause of surrounding rock failure.Based on the variation law of non-uniformity of bidirectional stress,a stress zoning method based on confining pressure ratio is proposed.The advance mining stress field of the working face is divided into limit equilibrium zone,high deviatoric stress zone(η≥η2),deviatoric stress drop zone(η2>η>η1),and original rock stress zone(η=η1).② Corresponding to different failure modes and stable state changes of the surrounding rock,the advance roadway is further divided into broken zone,butterfly failure zone,elliptical failure zone,and circular failure zone,reflecting observed mine pressure behaviors.③Building on these zoning laws,a differential subsection support control method is proposed to ensure the coordination of the relationship between support and surrounding rock,which is helpful to optimize the reinforcement support design of advance roadway and provide theoretical guidance for construction.
Keywords：mining stress fieldadvance roadwaybutterfly-shaped damageshape of plastic zoneadvance support
Publication Date：2025-02-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 124-132 )