摘要
采空区是地下采矿活动中所形成的空洞区。为预测采空区自稳时间,指导矿山安全生产,本研究以某钨矿2线0沿南采空区为工程背景,通过采空区影响因素敏感性分析,基于Burgers蠕变模型和弹性薄板模型,构建采空区三维蠕变力学模型,最后应用Flac^(3D)模拟软件,进行采空区自稳流变效应的对比分析。结果表明:根据构建的采空区三维蠕变力学模型,推导出了顶板下沉位移量随时间变化的表达式,计算得出该采空区自稳时间为120.22个月,与采用Flac;软件计算得出的118.06个月自稳时间相近,表明所建立的三维蠕变力学模型能够较好地应用于采空区自稳时间的预估。
Goaf is a cavity formed in underground mining activities. In order to predict the self stabilization time of goaf and guide mine safety production,this paper takes the South goaf along line 0 of a tungsten mine as the engineering background. Through the sensitivity analysis of influencing factors in goaf,a three-dimensional creep mechanical model of goaf is constructed based on burgers creep model and elastic thin plate model. Finally,Flac^(3D)simulation software is used to compare and analyze the self-stable rheological effect of goaf. The results show that according to the three-dimensional creep mechanical model of goaf,the expression of roof subsidence displacement varying with time is deduced. It is calculated that the self stabilization time of goaf is 120. 22 months,which is close to the self stabilization time of 118. 06 months calculated by Flac;software,It shows that the three-dimensional creep mechanical model can be well applied to the prediction of self stabilization time in goaf.
作者
蔡泳
邓国梁
甄利兵
成墙
黄金涌
CAI Yong;DENG Gouliang;ZHEN Libing;CHENG Qiang;HUANG Jingyong(State Key Laboratory of Coal Mine Disaster Dynamic and Control,Chongqing 400044,China;School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China;Guizhou Zijin Mining Co.,Ltd.,Zhenfeng 562200,China)
出处
《金属矿山》
CAS
北大核心
2022年第2期96-101,共6页
Metal Mine
基金
国家自然科学基金面上项目(编号:51674049)。
