摘要
采空区稳定性关系到矿山生产安全.为了方便准确地对采空区稳定性进行分析,以指导矿山安全生产.以某铅锌矿的某采空区为例,获取了采场的RQD值、节理组数、节理粗糙度、节理蚀变度等采空区力学指标或结构参数,分别计算出采空区的修正的岩石 Q 值、应力系数、节理方位系数、重力调整系数,进而计算得到采场的稳定数;统计了采空区的长度、高度和宽度等形状参数,以此为基础计算得到采空区的壁面积和壁周长,进而计算得到采空区的形状因子,以采空区的稳定数和形状因子为依据,在Mathews稳定图确定采空区所在的点,根据落点位置确定采空区稳定性,进而指导矿山安全生产.实践证明,Mathews稳定图法对采场稳定性分析是准确的.
Abstract
The stability of goaf is related to the safety of mining production.In order to facilitate and accurately analyze the stability of goaf and guide mine safety production.Taking a certain goaf of a lead-zinc mine as an example,the mechanical indicators or structural parameters of the goaf,such as RQD value,number of joint groups,joint roughness,and joint alteration degree,were obtained.The corrected rock Q value,stress coefficient,joint orientation coefficient,and gravity adjustment coefficient of the goaf were calculated,and then the stability number of the goaf was calculated;The shape parameters of the goaf,such as length,height,and width,were statistically analyzed.Based on this,the wall area and perimeter of the goaf were calculated,and the shape factor of the goaf was then calculated.Based on the stability number and shape factor of the goaf,the point where the goaf is located was determined on the Mathews stability map,and the stability of the goaf was determined based on the landing point position,thereby guiding the safety production of the mine.It's proved that the Mathews stability diagram method is accurate in analyzing the stability of mining areas.
基金项目
云南省科技厅基金项目(KKS0202121020)
国家科技期刊平台
NSTL
万方数据