摘要
采空区充填是预防矿山地下开采导致地表变形、开裂以及建(构)筑物损坏的主要途径,但开采和充填过程中覆岩移动依然存在,不同的采充顺序对地表影响也存在差异,因此,研究确定合理的采充顺序十分重要。以某大型铜镍矿地下开采为研究对象,根据矿体、覆岩岩层及地表第四系空间位置关系,结合矿体开采方案,采用数值模拟方法分析了矿山3种不同采充顺序下覆岩移动与地表变形影响情况,结果表明:随着开采深度增加采充顺序带来的地表变形差异性减小,研究的对象距地表291m时矿体不同采充顺序产生的地表变形位移值差异约为6%;采充顺序对覆岩形成"移动拱"的影响最为突出,主要体现在"移动拱"范围和位移大小上,是评判开采顺序影响的重要研究内容。
Goaf filling is the main way to prevent surface deformation,cracking and damage of buildings(structures)caused by underground mining.However,overburden movement still exists in the process of mining and filling,and different mining and filling sequences have different effects on the surface.Therefore,it is very important to study and determine a reasonable mining and filling sequence.Taking the underground mining of a large-scale copper-nickel mine as the research object,according to the spatial relationship of ore body,overburden strata and surface quaternary system,combined with the mining scheme of ore body,the influence of overburden movement and surface deformation under three different mining and filling sequences was analyzed by numerical simulation method.The results show that,with the increase of mining depth,the difference of surface deformation caused by mining and filling sequence decreases.When the object is 291 maway from the surface,the difference of surface deformation displacement caused by different mining and filling sequence is about 6%.The influence of mining and filling sequence on the formation of moving arch of overburden rock is the most prominent,which is mainly reflected in the range and displacement of moving arch.It is an important research content to evaluate the influence of mining sequence.
作者
吴亚斌
张智博
WU Yabin;ZHANG Zhibo(Changsha Institute of Mining Research Co.,Ltd,Changsha,Hunan 410012,China;State Key Laboratory of Safety Technology of Metal Mine,Changsha,Hunan 410012,China)
出处
《矿业研究与开发》
CAS
北大核心
2020年第7期12-17,共6页
Mining Research and Development
关键词
空场嗣后充填法
采充顺序
地表变形
Open stope and subsequent filling method
Mining and filling sequence
Surface deformation
