摘要
对特厚煤层条件下采用螺旋钻机开采细长窄煤柱的破坏过程进行了数值模拟。模拟结果再现了开采过程中煤柱破坏发生、发展直至塑性区贯通破坏的全过程,并从应力场演化分析了煤柱破坏过程的应力分布特征及破坏机理。
Numerical simulation software FLAC2D is used to simulate the failure mechanism of slender coal pillars (which are of much lower width to height ratios) during high wall mining of thick seam. The results reproduce the whole process from the initiation of pillar failure, propagation, to plastic zone being joined together. The characteristics of stress distribution and failure mechanism of coal pillars are discussed by the numerically obtained stress yield during pillar deformation and failure process.
出处
《岩土力学》
EI
CAS
CSCD
北大核心
2004年第2期266-269,共4页
Rock and Soil Mechanics
关键词
螺旋钻机开采
煤柱破坏
数值模拟
auger mining
coal pillar failure
numerical simulation
