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金属矿山 2011, Vol. 40 Issue (05) :18-22+69    DOI:
采矿工程 最新目录 | 下期目录 | 过刊浏览 | 高级检索 << Previous Articles | Next Articles >>
充填体不均匀性相似模拟实验研究
许文远,杨小聪,郭利杰
北京矿冶研究总院
Experimental Research on Inhomogeneous Simulation of Fill-body
Xu Wenyuan,Yang Xiaocong,Guo Lijie
Beijing General Research Institute of Mining and Metallurgy

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摘要 充填采矿法要求充填体具有一定的强度以保证后续回采的安全。传统方法是通过实验室配比实验进行充填设计,然而由于充填料浆离析分层的原因,充填体表现出不均匀特性,充填体现场实测强度与设计强度相差较大,这给安全生产带来隐患。设计了一种简单、可靠的充填体中水泥含量的检测方法,以该方法为基础,通过相似模拟水槽实验,系统研究了充填体的不均匀特性。结果表明:砂灰比为4的充填体强度呈S型分布,砂灰比为10的充填体强度呈线性递减,低砂灰比充填体表现出局部均匀、整体分层的特性,并得出充填体强度与水泥含量不成正比关系,水泥颗粒大量聚集在一起不利于充填体的强度,水泥含量高并不代表强度高。  
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许文远
杨小聪
郭利杰
关键词充填体   水泥含量   强度分布   不均匀性     
Abstract: The cut-and-fill mining method requires the material used for backfilling owning a certain strength to ensure safety recovery.Traditionally,filling designs are determined by laboratory experiments of mixture ratio,but the filling body is non-uniform due to the segregation of the filling slurry in layers.The difference of design strength of fill body differs greatly from that measured on site,resulting in the safety problems in production.This paper describes a simple,reliable method to measure the cement content in fill body and to systematically study the inhomogeneous property through simulation experiment of water tank.The results show that the strength of the fill body with sand-cement ratio of 4 has an S-type distribution,while that with sand-cement ratio of 10 shows a linear decrease of strength with body length.The low sand-cement ratio fill object shows a characteristic of locally uniform and layered structure which results in the following conclusions: the strength of fill body is not directly proportional to cement content and a high content of cement does not necessarily imply a high strength since the aggregation of cement particles in large amounts adversely affects the strength of fill body.
KeywordsFill-body   Cement content   Intensity distribution   Inhomogeneous     
Fund:

国家自然科学基金项目(编号:51004014)。

引用本文:   
许文远, 杨小聪, 郭利杰.充填体不均匀性相似模拟实验研究[J]  金属矿山, 2011,V40(05): 18-22+69
XU Wen-Yuan, YANG Xiao-Cong, GUO Li-Jie.Experimental Research on Inhomogeneous Simulation of Fill-body[J]  METAL MINE, 2011,V40(05): 18-22+69
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