Numerical analysis and geotechnical assessment of mine scale model

• Published in: International journal of mining science and technology Vol. 22; no. 5; pp. 693 - 698
• Main Authors: Khanal, Manoj, Adhikary, Deepak, Balusu, Rao
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.09.2012; Earth Science and Resource Engineering, Commonwealth Scientific and Industrial Research Organization, Queensland Center for Advanced Technology, Technology Court,Pullenvale QLD 4069, Australia
• Subjects: Abutment; Chock; Coal; Mining; 岩土工程问题; 工程评估; 数值分析; 数值方法; 缩尺模型; 连续介质力学; 选择工具; 长壁开采; Mining; Chock; Abutment; Coal
• ISSN: 2095-2686
• DOI: 10.1016/j.ijmst.2012.08.017

Various numerical methods are available to model,simulate,analyse and interpret the results;however a major task is to select a reliable and intended tool to perform a realistic assessment of any problem.For a model to be a representative of the realistic mining scenario,a verified tool must be chosen to perform an assessment of mine roof support requirement and address the geotechnical risks associated with longwall mining.The dependable tools provide a safe working environment,increased production,efficient management of resources and reduce environmental impacts of mining.Although various methods,for example,analytical,experimental and empirical are being adopted in mining,in recent days numerical tools are becoming popular due to the advancement in computer hardware and numerical methods.Empirical rules based on past experiences do provide a general guide,however due to the heterogeneous nature of mine geology（i.e.,none of the mine sites are identical）,numerical simulations of mine site specific conditions would lend better insights into some underlying issues.The paper highlights the use of a continuum mechanics based tool in coal mining with a mine scale model.The continuum modelling can provide close to accurate stress fields and deformation.The paper describes the use of existing mine data to calibrate and validate the model parameters,which then are used to assess geotechnical issues related with installing a new high capacity longwall mine at the mine site.A variety of parameters,for example,chock convergences,caveability of overlying sandstones,abutment and vertical stresses have been estimated.