Vol. 44 No. 2 Apr. 2017
矿业安全与环保
MINING SAFETY & ENVIRONMENTAL PROTECTION
张淑坤，王来贵.局部弱场控制下煤柱顶板结构破坏模拟研究[J].矿业安全与环保，2017,44(2);98-101 文章编号：10084495(2017)02009804
第44卷第2期 2017年4月
局部弱场控制下煤柱顶板结构破坏模拟研究
张淑坤“，王来贵”
(辽宁工程技术大学a.土木与交通学院；b.力学与工程学院，辽宁阜新123000）
摘要：基于弱场控制原理，以煤柱顶板整体系统为例，分析包括强度弱场、刚度弱场和稳定性弱场控制下的煤柱顶板应力及位移演化规律，证实了煤柱顶板系统整体稳定性受弱场控制。研究结果表明：煤柱顶板整体系统可以同时存在多个弱场，而各个局部弱场的主导作用随着外部环境的改变而可以相互转化，并对应著不同的破坏模式。对于煤柱顶板整体系统而言，局部弱场具有层次性，煤柱、顶板子系统的强度弱场或刚度弱场构成了局部稳定性弱场，局部稳定性弱场对煤柱顶板整体系统的稳定性起到控制作用。
关键词：煤柱顶板；局部弱场控制；整体系统稳定性；破坏模式中图分类号：TD31文献标志码：A
网络出版时间：2017041110：09
网络出版地址:http://kns.cnki.net/kcms/detail/50.1062.TD.20170411.1009.012.html
Simulation Study on Structural Failure of Coal Pillar Roof under Control
of LocalWeakField
ZHANG Shukun",WANG Laigui
(a. School of Cieil Engineering and Transporfation, b, School of Mechanics and Engineering
Liaoning Technical Unirersily, Fuxin 123000, China)
Abstract : In this paper, analysis was carried out on the the coal pillar roof stress and displacement evolution law under the control of the intensity weak field, stiffness weak field and stability weak field based on the weak field control theory and by Laking the whole system of the coal pillar roof as an example, and it was confirmed that the whole system stability of the coal pillar roof was controlled by the weak field. The researech results showed that multiple weak fields might exist in the whole system of the coal pillar roof at the same time, the leading function of each local weak field could transform each other with the change of the external environment, and corresponded to a diferent failure mode. For the whole system of the coal pillar roof,the local weak field had the hierarchy , the intensity weak field or stiffness weak field of the coal pillar and roof subsystem constituted the weak field of the local stability, and the weak field of the local stability had the control effect on the stability of the whole system of the coal pillar roof
Keywords : coal pillar roof; local weak field control; whole system stability ;failure mode
稳定的煤柱与顶板整体系统能有效抑制上覆岩层移动和地表沉陷，进而可保护地面建（构）筑物和地表环境1-3]。煤柱回收或煤岩体损伤可能导致煤柱子系统或项板子系统局部失效，同时会引起邻近
收稿日期：2016-07-18;2016-12-31修订
基金项目：国家自然科学基金面上项目（51474121）；国家自然科学基金青年基金项目（51504125）；辽宁省教育厅基金项目（LJYL055）
作者简介：张激坤（1983一），男，黑龙江哈尔滨人，博士，副教授，主要从事岩土工程方面的科研与教学工作。E一 mail:4254423@ 163. com。
98 · 万方数据
煤柱及项板过载，甚至导致煤柱项板系统整体失稳[4-1]。针对煤柱项板系统稳定性，诸多研究人员展开了广泛的研究。贺广零、王金安等[8-9]将坚硬项板假设为弹性板，煤柱视为弹性软化支撑，得出了导致项板期陷位移突跳、整体系统失稳的煤柱有效横截面临界值；许兴亮等[10]研究了不同煤柱条件下顶板破断结构稳定性，以项板岩块回转角度为控制变量，指出项板岩块回转角度由自身长度及下沉量共同决定；张国锋等]通过采用顶板预裂的方式切断沿空巷道项板与采场直接项、基本顶的联系，将巷道围岩应力集中转移到围岩深部；刘畅等(12)以基本顶铰接