Analysis of Dynamic Surface Subsidence at the Underground Coal Mining Site in Velenje, Slovenia through Modified Sigmoidal Function

Minerals

Milivoj Vulić¹  Janez Rošer²  Drago Potočnik² 

[1] Faculty of Natural Sciences and Engineering, University of Ljubljana, 1000 Ljubljana, Slovenia;Premogovnik Velenje d.o.o., 3328 Velenje, Slovenia;

关键词: underground coal mining;    longwall;    surface subsidence;    logistic function;    modified sigmoid function;   

DOI  :  10.3390/min8020074

来源: DOAJ

【 摘 要 】

In underground coal mining engineering, one of the most important tasks is to monitor, predict and manage the surface subsidence due to underground coal excavation. The impact of underground mining excavation reflects as subsidence of the overlying strata and the formation of surface depressions soon after excavation. The surface subsidence is one of many natural processes that exhibit a progression from small beginnings that accelerate and approach a climax over time. When detailed data is lacking, a logistic function is often used. In this paper, the analysis of the surface subsidence above underground mining sites in the Velenje Coal Mine by using a modified sigmoid function (surrogate of logistic function), with the common “S” shape, is introduced. Furthermore, the time estimation of the next and the final epoch measurement is considered.

【 授权许可】

Unknown