摘要
煤矿采空区稳定性的影响因素众多,为了更好地解决大型缓倾煤矿采空区稳定性评价问题,通过FLAC 3D有限差分软件对采空区的多种开采工况进行数值模拟,提出了影响该类采空区稳定性的主要因素,并在此基础上采用层次分析法(AHP)进一步确定各影响因素的权重。针对山西中阳县多家煤矿采空区稳定性问题,根据影响因素综合评分表对各个影响因素进行评分赋值,最终计算得到采空区稳定性总得分,由此综合判定采空区稳定性等级。这种稳定性评价方法得出的结果与采空区地表位移变形观测法评价得出的结果相符,研究成果对类似采空区稳定性评价具有重要的借鉴参考意义。
As there are plenty of factors affecting the stability in the mined-out area and in order to better evaluate the stability of large and gently-inclined mined-out area,this paper numerically simulated the multiple mining conditions with FLAC 3D finite difference software and proposed major factors affecting the stability in the mined-out area of such type,and then weighed each influencing factor with analytic hierarchy process (AHP) on this basis. On the goal stability of many coal mines in Zhongyang County of Shanxi Province,we scored the each influencing factor according to the Comprehensive Scoring Table of Influencing Factors, and finally computed the total score of the stability in the mined-out area and comprehensively determined the grade of stability in the mined- out area thereby.Results from this method for stability evaluation are consistent with those from the observational method for the ground movement deformation in goaf,therefore,the results are of great referential significaqnce to evaluate the stability in similar mined-outareas.
作者
唐鹤鸣
Tang Heming(Shaanxi Railway Engineering Survey Co. , Ltd. , Xi'an 710000, Shaanxi,China)
出处
《岩土工程技术》
2019年第4期202-207,217,共7页
Geotechnical Engineering Technique
关键词
采空区
稳定性评价
数值模拟
层次分析法
主要因素
评分法
goaf
stability evaluation
numerical simulation
analytic hierarchy process
major factors
scoring method
