基于结构离散的复杂水平采空区群残采激励动力响应

发布时间：2018-06-30 09:21

本文选题：采空区群 + 动力响应模型　；参考：《中国有色金属学报》2017年05期

【摘要】：为研究残采激励下复杂组合水平采空区群的动力响应,借助离散化方法,构建复杂水平采空区群动力响应模型。结合数值模拟,对某大型地下金矿山KT8矿体1100 m中段复杂水平采空区群进行动力响应及应力传递研究。结果表明:爆破激励下,水平采空区群结构的改变几乎不会对其作用岩体本身的位移响应和速度响应产生影响,但对其余部分岩体响应产生较为明显的增幅,其中增幅最大的区域是水平采空区群的结构改变处岩体;爆破荷载对其作用岩体应力分布产生较明显的变化,对其余部分岩体不会产生明显的影响。现场工程结果表明,复杂水平采空区群间柱经残采后,所形成新的大采空区稳定性良好,空区周边没有发生大的位移变形,并验证动力响应模型分析的可靠性,该方法为复杂采空区群残采作业提供理论指导。
[Abstract]:In order to study the dynamic response of a complex combination of horizontal goaf groups under residual mining excitation, a dynamic response model of complex horizontal goaf groups was constructed by means of discrete method. Combined with numerical simulation, the dynamic response and stress transfer of complex horizontal goaf group in 1100 m middle section of KT8 ore body in a large underground gold mine are studied. The results show that under blasting excitation, the change of the structure of the horizontal goaf group has little effect on the displacement response and velocity response of the rock mass itself, but it can increase the response of the other parts of the rock mass obviously. The area with the largest increase is the rock mass where the structure of the horizontal goaf group is changed, and the blasting load has obvious changes on the stress distribution of the rock mass acting on it, but it will not have obvious influence on the other part of the rock mass. The field engineering results show that the stability of the new large goaf is good, and there is no large displacement around the goaf, and the reliability of the dynamic response model analysis is verified. The method provides theoretical guidance for complex goaf mining operations.
【作者单位】：华南理工大学土木与交通学院;中交城市投资控股有限公司;北京科技大学土木与环境学院;
【基金】：国家重点研发计划资助项目(2016YF0600802) 国家自然科学基金资助项目(51174093,51374035,51574013)~~
【分类号】：TD325.3

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