山东煤炭科技Issue(1)：50-51,53,3.DOI:10.3969/j.issn.1005-2801.2015.01.22
煤层底板裂隙的断裂力学模型及其应用
Fracture mechanics model of fracture in the coal seam lfoor seams and its application
摘要
Abstract
Based on the tectonic development characteristics of the airfoil fracture in the coal floor, the fracture mechanics model of tensile-shear fracture is established, and according to the theory of fracture mechanics, the criterion of crack propagation is worked out. According to the actual data measured in the experiment, by using RFPA2D software, the process of airfoil fracture initiation, extension, transfixion and the finally caused specimen failure under different Rock bridge angle angle is simulated. The experimental results show that, under the effect of external stress, the initiation and extension of fracture is closely related to the density, spacing and spatial distribution of the crack angle, extension and connection is easier to occur in high angle fracture, the larger crack density and the smaller spacing, the more prone to extend and lead to the rock buckling failure.关键词
断裂力学/RFPA/数值模拟/裂隙Key words
fracture mechanics/rfpa/numerical simulation/crack分类
天文与地球科学引用本文复制引用
王麒,魏久传,张莹莹..煤层底板裂隙的断裂力学模型及其应用[J].山东煤炭科技,2015,(1):50-51,53,3.基金项目
山东省沉积成矿作用与沉积矿产重点实验室开放课题资助（noDMSM201012）；国家自然科学基金资助（no41372290）；中国煤炭工业协会2011年度科学技术指导性计划项目资助（MTKJ2011-369）；山东省自然科学基金重点项目资助（ZR2011EEZ002）；山东科技大学矿井水害防治团队资助。 （）
