采矿与安全工程学报2017，Vol.34Issue(2)：251-258,8.DOI:10.13545/j.cnki.jmse.2017.02.008
FLAC3D可破断锚杆单元完善及深部煤巷应用
Improvement of breakable anchor bolt element in FLAC3D and its application in deep coal roadway
摘要
Abstract
In order to further improve the breakable bolt element based on FLAC3D, the defects of the breakable bolt element with the arbitrary elements elongation as the breaking criterion were analyzed. The bolt breaking criterion was proposed based on the whole elongation rate of the free segment of the bolt, which modified the original breakable bolt element. The tensile test of bolt was carried out and the results show that the modified breakable bolt element conformed to reality better. Based on the practical engineering background of deep mining, the numerical simulation analysis was performed. The results show that the built-in cable element in FLAC3D has no breakable property and will endanger the support design; all of the bolts were broken prematurely in the original scheme of breakable cable element and the actual anchoring effect was suppressed; the modified breakable cable element can reflect the actual anchoring effect accurately and conform to the engineering practice better. The further orthogonal ex-periment was carried out, and the results show that the bolt broken failure rate significantly increases with the enlargement of the row/column spacing of bolts, and first increases and then declines with the increase of the anchorage length and prestress. The effect of prestress was relatively the most indistinc-tive. At last the optimization principle of anchoring parameters in deep mine was proposed.关键词
FLAC3D/锚杆破断/破断判据/深部煤巷/修正Key words
FLAC3D/anchor bolt broken/broken failure criterion/deep coal roadway/modification分类
建筑与水利引用本文复制引用
杨宁,李为腾,玄超,张玉华,李大勇,李廷春,王刚..FLAC3D可破断锚杆单元完善及深部煤巷应用[J].采矿与安全工程学报,2017,34(2):251-258,8.基金项目
国家自然科学基金项目(51604166) （51604166）
中国博士后科学基金项目(2016M590645,2015M580599) （2016M590645,2015M580599）
江苏建筑节能与建造技术协同创新中心开放基金项目(SJXTQ1508) （SJXTQ1508）
江苏建筑职业技术学院重点课题项目(JYJBZX16-1) （JYJBZX16-1）
青岛市博士后应用研究项目(2016130) （2016130）
