CAJ | 학술논문

煤层底板岩体是沉积岩，具有显著的层状结构特点。为研究层状岩体压缩强度的结构面效应，通过FLAC3D数值软件，结合改进的遍布节理本构模型，建立层状岩体压缩数值模型，分析单轴、三轴压缩情况下的应力应变响应以及强度特征。研究结果表明：层状岩体压缩强度具有显著的结构面倾角效应。随着倾角的增大，层状岩体的压缩强度呈现先减小后增大的趋势。当结构面倾角为40°～80°时，岩体强度整体较低，破裂面主要沿结构面展开。数值试验和理论分析反映的岩体强度随结构面倾角变化规律一致。层状岩体弹性模量沿平行于结构面方向最大，而垂直于结构面方向最小，并随结构面与水平面之间夹角的增加而增大。
매층저판암체시침적암，구유현저적층상결구특점。위연구층상암체압축강도적결구면효응，통과FLAC3D수치연건，결합개진적편포절리본구모형，건립층상암체압축수치모형，분석단축、삼축압축정황하적응력응변향응이급강도특정。연구결과표명：층상암체압축강도구유현저적결구면경각효응。수착경각적증대，층상암체적압축강도정현선감소후증대적추세。당결구면경각위40°～80°시，암체강도정체교저，파렬면주요연결구면전개。수치시험화이론분석반영적암체강도수결구면경각변화규률일치。층상암체탄성모량연평행우결구면방향최대，이수직우결구면방향최소，병수결구면여수평면지간협각적증가이증대。
Coal seam floor rock mass is sedimentary rock and has obvious characteristics of layered structure .In order to study the structural plane effect on compressive strength of layered rock mass , the stress-strain response and strength characteristic of layered rock mass under uniaxial compression and triaxial compression were ana -lyzed by numerical simulation with FLAC 3D .The results showed that compressive strength of layered rock mass has remarkable effect of layer plane dip .The compressive strength of rock mass first decreases and then increases with the increase of structure plane dip angle .When the structure plane dip angle is 40 °~80 °, the strength of rock mass is low and the fracture plane develops in the structure plane .Numerical experiments and theoretical a-nalysis gave the consistent regularity of rock strength with structural plane dip variation .The maximum elastic modulus of layered rock mass is parallel to structural plane and the minimum in the direction perpendicular to the structural plane , and increases with the angle rise between the structural plane and the horizontal plane .