Experimental investigation into mechanical characteristics of surrounding rock with different mining thicknesses
YANG Ke
XIE Guang-xiang
CHANG Ju-cai
Abstract：In order to explore the mechanical characteristics including deformation, displacement and stress distribution of surrounding rock during face advancing with different mining thicknesses, according to the geological and technical conditions of the No. 1151 (3) working face in Xieqiao Mine, the analyses of similar material simulation were synthetically applied. The results show that in the process of mining with different mining thicknesses, the stress distribution of rock surrounding seam roof and floor are distinct phase characteristics and there is macro-stress-arch that acts as the main loading in the overlying strata and original rocks of face frontage and open-off cut hear. And the displacement evolving configuration of overlying strata is unsymmetrical. With the once mining thickness increases, the fore-and-aft fractured angles of overlying strata are basically equable and the extent of abutment pressure and the height of caving and fractured zone are augmenting. The height of caving zone and fractured zone and the distance of abutment pressure peak value to face wall are nonlinear inverse ratio to once mining thickness.
Keywords：mining thicknesssurrounding rockmechanical characteristicsimilar material simulationmacro-stress-arch
Publication Date：2009-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 1446-1450 )