DOI: 10.11799/ce201709018
Application of multi-length support technology in coal roadway with aquiferous soft and weak interlayer roof
XIE Zhi-hong
SHI Xian-yuan
LI Xiang-yang
Abstract：To study the effect of multi-length support technology in coal roadway with aquiferous soft and weak interlayer roof. Firstly, we took the engineering background of Xuchang Coal Mine to analyze the mechanical mechanism of multi-length support;then, we carried out the disintegration tolerance experiment and expansion experiment of roof mudstone;and focused on the application effects of the support technology in transportation roadway of 3315 working face. As a result, the average disintegration tolerance index of roof mudstone is 77. 92%;the maximum expansion stress and ratio are 0. 95 MPa and 3. 5%, respectively. It proves that the water has a weakening effect on the strength of soft and weak interlayer. Furthermore, during roadway tunneling and excavation, the maximum convergence of roadway ribs are 82mm and 149mm, that of roof and floor are 10mm and 549mm, respectively, and the maximum roadway roof saparation displacement is 7mm. Obviously, the results prove that the multi-length support technology has a good supporting effect for coal roadway coal roadway with aquiferous soft and weak interlayer roof.
Keywords：soft and weak interlayercomposite roofmulti-length supportsoft rockdeep mining
Publication Date：2017-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 67-71 )