Study on Influence of Rock Mass Structure Type on Surrounding Rock Stability of Deep Mine Roadway
NIU Shaoqing
YANG Shuangsuo
LI Yi
LIU Guangyu
Abstract：To counter to the characteristics of large rock thickness change and a variety of rock mass structures around the pit bottom in the stand-by area in No. 5 Mine of Yangquan Coal Industry ( Group) Co. , Ltd. , in this paper, study was made on the influence of rock block size upon the roadway stability by starting from the classification of rock mass structures and analyzing the characteristics of the roadway stress field and the distribution characteristics of the failure area under different rock structure characteristics, and a relational expression between the rock block size and the surrounding rock failure degree was established by using the method of mathematical fitting. The study results showed that under other same conditions, the smaller the rock block size, the worse the roadway stability; the structural size of the rock mass was an important index for the classification of the roadway rock stability;and the roadway rock stability can be analyzed and determined by referring to the calculation result with formula x > 1R0 ln a -y0A .
Keywords：rock mass structureroadwaystability of surrounding rocknumerical simulation
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 24-27 )