Comprehensive Analysis on Surrounding Rock Stability of Deep Soft Rock Roadway and Supporting Practice
NIU Jianchun
GAO Jiaping
ZHANG Shengjun
DING Yaheng
ZHU Shuyun
Abstract：To counter to the deformation failure of the surrounding rock of the deep roadways in Chengjiao Mine of Yongcheng Coal Group, analysis was made on the engineering geological characteristics of the deep roadway surrounding rock, the surrounding rock of the roadway was in a very unstable state and the deformation failure characteristics of the high-stress soft-rock roadway was clearly appeared;the results of numerical calculation showed that four high shear stress zones were formed at four corners of the roadway and the shear stress was about 2. 1 MPa; the shear stress in the roadway floor was smaller and about 0. 1 MPa, but it was greatly affected by the high shear stress zones in the two sides of the roadway. Therefore, a support mode by the synergistic effect of anchor bolt and cable anchor pre-tightening force was selected, which can not only effectively control the deformation of the surrounding rock, but can also make the roadway surrounding rock quickly keep stable and prevent from the great deformation of the surrounding rock. The field monitoring proved that the synergistic support mode can effectively control the deformation of the surrounding rock and reflect the active supporting effect of the pre-stressed anchor bolt ( cable anchor) . The research results have an important reference value for the support mode choice of the surrounding rock of the deep roadways in Chengjiao Mine.
Keywords：deep roadway surrounding rockstability analysisactive supportnumerical simulationfield monitoring
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 68-71 )