Numerical Analysis of Finite Deformation of Overbroken Rock Mass in Gob Area Based on Euler Model of Control Volume

作     者：LIU Wei-qun MIAO Xie-xing 

作者机构：School of Sciences China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China 

出 版 物：《Journal of China University of Mining and Technology》 (中国矿业大学学报（英文版）)

年 卷 期：2006年第16卷第3期

页      面：245-248页

核心收录：

学科分类：0808[工学-电气工程] 0819[工学-矿业工程] 081903[工学-安全技术及工程] 08[工学] 0820[工学-石油与天然气工程] 0817[工学-化学工程与技术] 0807[工学-动力工程及工程热物理] 0818[工学-地质资源与地质工程] 0815[工学-水利工程] 0827[工学-核科学与技术] 0703[理学-化学] 0802[工学-机械工程] 0813[工学-建筑学] 0814[工学-土木工程] 0702[理学-物理学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：Projects 2005CB221502 supported by the Vital Foundational 973 Program of China, 50225414 by the National Outstanding Youth Foundation,20040350222 by China Postdoctoral Science Foundation BK 2004033 by Jiangsu Natural Science Foundation 

主　　题：overbroken rock mass plastically finite deformation method of control volume bearing pressure 

摘      要：The overbroken rock mass of gob areas is made up of broken and accumulated rock blocks compressed to some extent by the overlying strata. The beating pressure of the gob can directly affect the safety of mining fields, formarion of road retained along the next goaf and seepage of water and methane through the gob. In this paper, the software RFPA＇2000 is used to construct numerical models. Especially the Euler method of control volume is proposed to solve the simulation difficulty arising from plastically finite deformations. The results show that three characteristic regions occurred in the gob area： （1） a naturally accumulated region, 0-10 m away from unbroken surrounding rock walls, where the beating pressure is nearly zero; （2） an overcompacted region, 10-20 m away from unbroken walls, where the beating pressure results in the maximum value of the gob area; （3） a stable compaction region, more than 20 m away from unbroken walls and occupying absolutely most of the gob area, where the beating pressures show basically no differences. Such a characteristic can exolain the easy-seeoaged “O-ring phenomena around mining fields very well.