An analytic solution describing the visco-elastic deformation of coal pillars in room and pillar mine  

作　　者：Li Qiang XU Hui BU Wankui Zhao Guozhen 

机构地区：[1]School of Mechanics ＆ Civil Engineering, China University of Mining ＆ Technology, Xuzhou 221116, China [2]State Key Laboratory of Geomechanics ＆ Deep Underground Engineering, China University of Mining ＆ Technology, Xuzhou 221008, China [3]Department of Mechanical and Electrical Engineering, Heze University, Heze 274015, China

出　　处：《Mining Science and Technology》2011年第6期885-890,共6页矿业科学技术（英文版）

基　　金：provided by the National Basic Research Program of China (No. 2005CB221502);the Major Program of National Natural Science Foundation of China (No.50490273);the Postdoctoral Subject Foundation of the State Key Laboratory of Geomechanics & Deep Underground Engineering(No. PD1005);the Research Foundation of Heze University (No.XY10BS04);the TransCentury Training Program Foundation forthe Talents by the State Education Commission (No. NCET-08-0837);the National Natural Science Foundation of China (No.50834005)

摘　　要：Coal pillar deformation is typically nonlinear and time-dependent. The accurate prediction of this defor- mation has a vital importance for the successful implementation of mining techniques. These methods have proven very important as a way to excavate coal resources from under buildings, railways, or water bodies. Elastic and visco-elastic theory are employed with a Maxwell model to formulate an analytic solution for displacement of coal pillars in room and pillar mine. These results show that the visco-elastic solution adequately predicts the coal pillar deformation over time. We conclude that the visco-elastic solution can predict the coal pillar and roadway displacement from the measured geological parameters of the conditions in situ. Furthermore, this method would be useful for mine design, coal pillar support optimization, ground subsidence prediction, and coal pillar stability analysis.Coal pillar deformation is typically nonlinear and time-dependent. The accurate prediction of this defor- mation has a vital importance for the successful implementation of mining techniques. These methods have proven very important as a way to excavate coal resources from under buildings, railways, or water bodies. Elastic and visco-elastic theory are employed with a Maxwell model to formulate an analytic solution for displacement of coal pillars in room and pillar mine. These results show that the visco-elastic solution adequately predicts the coal pillar deformation over time. We conclude that the visco-elastic solution can predict the coal pillar and roadway displacement from the measured geological parameters of the conditions in situ. Furthermore, this method would be useful for mine design, coal pillar support optimization, ground subsidence prediction, and coal pillar stability analysis.

关 键 词：Maxwell model Stability analysis Visco-elastic medium Coal pillar 

分 类 号：TD214[矿业工程—矿井建设] TP242[自动化与计算机技术—检测技术与自动化装置]