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采空区矿柱-顶板体系灾变的流变力学分析
引用本文:楼晓明,黄慎,韩雪靖,周平.采空区矿柱-顶板体系灾变的流变力学分析[J].金属矿山,2018,47(11):44-48.
作者姓名:楼晓明  黄慎  韩雪靖  周平
作者单位:1. 福州大学紫金矿业学院,福建 福州 350116;2. 福州大学爆炸技术研究所,福建 福州 350116
基金项目:* 国家自然科学基金项目(编号:51679093,51374112)。
摘    要:为研究采空区顶板-矿柱体系的稳定性,并确定其稳定时间,采用Hooke-Kelvin-kelvin模型,运用薄板理论和流变力学理论,建立了采空区顶板-矿柱体系的流变力学模型。以此模型为基础,推导出了采空区顶板沉降的微分方程,并根据顶板边界的破坏条件,求解出了采空区顶板-矿柱体系的稳定时间,并将求解结果与现场实际监测数据进行对比分析,验证了该模型的合理性与可靠性。研究表明:矿柱的流变变形是采空区顶板-矿柱体系失稳的重要原因,该流变力学模型可运用于现场的采空区的稳定时间预测,也可用于指导采空区进行及时有效的支护、充填等工作。

关 键 词:采空区  薄板理论  流变模型  稳定时间  

Rheological Mechanical Analysis on Disaster of Pillar-roof System in Goaf
Lou Xiaoming,Huang Shen,Han Xuejing,Zhou Ping.Rheological Mechanical Analysis on Disaster of Pillar-roof System in Goaf[J].Metal Mine,2018,47(11):44-48.
Authors:Lou Xiaoming  Huang Shen  Han Xuejing  Zhou Ping
Affiliation:1. The Zijin Mining College,Fuzhou University,Fuzhou 350116,China;2. Institute for Explosive Technology,Fuzhou University,Fuzhou 350116,China
Abstract:In order to study the stability of the roof-pillar system in the goaf and determine its stability time, the rheological model of roof-pillar system in goaf was established by using Hooke-Kelvin-kelvin model, the thin plate theory, and the rheological mechanics theory. Based on this model, the differential equation of goaf roof mining subsidence was deduced, and according to the damage conditions of roof boundary, the stability time of goaf roof pillar system was calculated. By comparison of calculated results with the actual monitoring data, the rationality and reliability of the model were verified. The research shows that the rheological deformation of pillar is an important reason for the instability of roof-pillar system in the goaf. The rheological mechanical model can be applied to predict the stability time of the mined-out area, and also can be used to realize the timely and effective supporting and filling for goaf.
Keywords:Goaf  Thin plate theory  Rheological model  Stability time
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