[1]周子龙,柯昌涛,王亦凡,等.基于颗粒离散元的矿柱群连锁失稳机理分析[J].中国地质灾害与防治学报,2018,29(4):78-84.
 ZHOU Zilong,KE Changtao,WANG Yifan,et al.Study on the mechanism of pillars cascading failure based on discrete particle flow code[J].The Chinese Journal of Geological Hazard and control,2018,29(4):78-84.
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基于颗粒离散元的矿柱群连锁失稳机理分析()
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《中国地质灾害与防治学报》[ISSN:1006-6977/CN:61-1281/TN]

卷:
29
期数:
2018年4
页码:
78-84
栏目:
出版日期:
2018-08-25

文章信息/Info

Title:
Study on the mechanism of pillars cascading failure based on discrete particle flow code
作者:
 周子龙; 柯昌涛; 王亦凡; 周静;
Author(s):
ZHOU ZilongKE ChangtaoWANG YifanZHOU Jing
(School of Resources and Safety Engineering,Central South University,Changsha,Hunan 410083,China)
关键词:
矿柱群连锁失稳颗粒离散元刚度安全系数
摘要:
矿矿柱群连锁失稳是破坏后果最为严重的采空区失稳模式。本文利用颗粒流离散元PFC2D研究了矿柱群连锁失稳的动态过程以及不同的矿柱安全系数、不同的诱发位置、不同的顶板刚度对矿柱群连锁失稳的影响。结果表明:(1)矿柱群的连锁失稳从诱发矿柱开始,失稳矿柱的应力传递到相邻未失稳的矿柱上造成相邻矿柱失稳,由此引发连锁效应;(2)矿柱的储备安全系数与载荷传递量的相对关系是决定矿柱群是否发生连锁失稳的关键;(3)矿柱群大规模失稳与诱发位置有关,诱发矿柱位于采空区的中心位置更容易形成大规模失稳,而位于采空区的边界位置,由于边界矿柱约束支撑作用则不容易诱发大规模失稳;(4)顶板的刚度显著地影响矿柱群的连锁失稳过程,刚度小的软弱顶板条件下,载荷传递从诱发位置向空区边界依次传递,失稳过程具有显著的"多米诺骨牌效应",而刚度大的坚硬顶板条件下,载荷传递与矿柱失稳不再表现出显著的"多米诺骨牌效应"。本文的研究成果可供开展相关工作借鉴。

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备注/Memo

备注/Memo:
—————————————— 收稿日期:2017-10-12;修订日期:2017-12-24基金项目:国家基础研究发展计划(973项目)(2015CB060200);国家自然科学基金面上项目(41772313)
更新日期/Last Update: 2018-09-14