DOI: 10.11799/ce201606014
Truss-cable compound support technology based on pre-stress attenuation theory
ZHANG Shou-bao
WANG Zhi-liu
REN Chao
SUN Jun-long
ZHANG Zhen-bo
WANG Yu
WANG Gang
Abstract：To study the forces in anchorage zone of the large-section coal roadway under the effect of truss-cable compound support, a mechanical model is established to analyze the pre-stress attenuation effect on the position of the neutral axis in anchorage zone, obtaining the neutral axis distribution in roof rock beam under truss-cable support. FLAC is applied to analyze the effect of three different support technology, and truss-cable support shows obvious advantages. The results show that, the horizontal pre-stress F gradually decreases when the distance between truss-cable and anchorage point x increases. Compared with ordinary bolt-cable support, the neutral axis of support system with pre-stress compound truss cable support moves down, the scope of the tension zone decreases, and the roof displacement and two-side convergence reduced about 8%.
Keywords：trussultra-large section open-off cutnumerical simulationpre-stresscompound support
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 44-47 )