Roadway deformation during riding mining in soft rock  

作　　者：Zhao Guozhen Ma Zhanguo Zhu Qinghua Mao Xianbiao Feng Meimei 

机构地区：[1]State Key Laboratory of Geomechanics and Deep Underground Engineering,China University of Mining&Technology,Xuzhou 221008,China [2]School of Mechanics and Civil Engineering China University of Mining&Technology,Xuzhou 221008,China [3]Zhangshuanglou Mine of Xuzhou Mine Group,Xuzhou 221616,China

出　　处：《International Journal of Mining Science and Technology》2012年第4期539-544,共6页矿业科学技术学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China (Nos. 50834005 and 51074163);the Ministry of Education Support Program for New Century Excellent of China(No. NCET-08-0837);the Fundamental Research Funds for the Central Universities of China;Youth Science and Technology Foundation of China University of Mining and Technology(No. 2010QNB25)

摘　　要："Riding mining" is a form of mining where the working face is located above the roadway and advances parallel to it.Riding mining in deep soft rock creates a particular set of problems in the roadway that include high stresses,large deformations,and support difficulties.Herein we describe a study of the rock deformation mechanism of a roadway as observed during riding mining in deep soft rock.Theoretical analysis,numerical simulations,and on site monitoring were used to examine this problem.The stress in the rock and the visco-elastic behavior of the rock are considered.Real time data,recorded over a period of 240 days,were taken from a 750 transportation roadway.Stress distributions in the rock surrounding the roadway were studied by comparing simulations to observations from the mine.The rock stress shows dynamic behavior as the working face advances.The pressure increases and then drops after peaking as the face advances.Both elastic and plastic deformation of the surrounding rock occurs.Plastic deformation provides a mechanism by which stress in the rock relaxes due to material flow.A way to rehabilitate the roadway is suggested that will help ensure mine safety.＂Riding mining＂ is a form of mining where the working face is located above the roadway and advances parallel to it. Riding mining in deep soft rock creates a particular set of problems in the roadway that include high stresses, large deformations, and support difficulties. Herein we describe a study of the rock deformation mechanism of a roadway as observed during riding mining in deep soft rock. Theoretical analysis, numerical simulations, and on site monitoring were used to examine this problem. The stress in the rock and the visco-elastic behavior of the rock are considered. Real time data, recorded over a per- iod of 240 days, were taken from a 750 transportation roadway. Stress distributions in the rock surround- ing the roadway were studied by comparing simulations to observations from the mine. The rock stress shows dynamic behavior as the working face advances. The pressure increases and then drops after peak- ing as the face advances. Both elastic and plastic deformation of the surrounding rock occurs. Plastic deformation provides a mechanism by which stress in the rock relaxes due to material flow. A way to rehabilitate the roadway is suggested that will help ensure mine safety.

关 键 词：Soft rock roadwayDeformation mechanismPartition broken rockViscoelastic-plastic analysis 

分 类 号：TD353[矿业工程—矿井建设] TD871.1