Comparison of closure measurements with finite element model results in an underground coal mine in central Utah

作     者：William G.Pariseau Michael K.McCarter Jessica M.Wempen 

作者机构：Department of Mining EngineeringUniversity of Utah 

出 版 物：《International Journal of Mining Science and Technology》 (矿业科学技术学报（英文版）)

年 卷 期：2019年第29卷第1期

页      面：9-15页

核心收录：

学科分类：08[工学] 0816[工学-测绘科学与技术] 

基　　金：Financial support by the National Institute of Safety and Health under Contract 200-2016-90240  MIS Analysis and DINSAR Measurements-Tools for Improving Mine Ground Control Safety is gratefully acknowledged 

主　　题：Finite element modeling Longwall mining Mine subsidence Stress modeling 

摘      要：Quantitative analysis of mine-wide subsidence at the kilometer scale and details of stress distribution about an advancing longwall face are estimated using an adaptation of the finite element method. The method is well suited to the tasks at hand. For greater realism, variability of strata properties is taken into account as are the effects of joints and cleats on elastic moduli and strengths. Evolution of pillar stress and entry closure remote from the face is readily quantified in a series of analyses that simulate face advance. Computed results compare favorably with the evolution of closure measurements about an instrumented pillar in a two-entry headgate. The appropriateness of the finite element method is confirmed. This method is based on first principles that avoid empirical schemes of uncertain applicability and numerical models ‘‘calibrated by fitting computer output to mine measurements.