摘要
采用极限分析原理建立了基于采场跨度与暴露面积的顶板安全厚度计算模型,利用反演算法深入分析发现,采空区长度与跨度比值k_a>2时,顶板安全厚度值取决于跨度的大小;k_a<2时,顶板安全厚度值取决于暴露面积的大小。结合某钨矿实际情况,选取相关参数进行计算分析,得到了不同跨度与暴露面积的采空区顶板安全厚度。分别选取不同跨度和暴露面积进行分析,进一步论证了顶板安全厚度与采场跨度及暴露面积之间的关系。
A calculation mode for the safe thickness of roof is established based on stope span and exposed roof area by using limiting analysis principle. The further analysis with inversion algorithm revealed that with length-span ratio over2,the safe thickness of stope roof depended on the span; while with the length-span ratio less than 2,the safe thickness of stope roof depended on the area of exposure. According to the practical situation in some tungsten mine,some relative parameters were selected for calculation,leading to the safe thickness obtained for goaf roofs with different spans and areas of exposure. And the further analysis has proven the safe thickness of roof depending on the stope span and area of exposure.
出处
《矿冶工程》
CAS
CSCD
北大核心
2016年第6期18-21,共4页
Mining and Metallurgical Engineering
基金
国家重点基础研究发展计划(973)项目(2012CB724207)
湖南省科技重大专项(2011FJ1003)
关键词
顶板安全厚度
采场跨度
暴露面积
极限分析
长跨比
safe thickness of roof
stope span
area of exposure
limit analysis
length-span ratio
