基于3D-σ软件的大红山铁矿Ⅲ~#、Ⅳ~#矿体稳定性研究  

Study on the Stability of Ⅲ~# and Ⅳ~# Orebody of Dahongshan Iron Mine Based on 3D-σ Software

作　　者：邢志华 沙斌 尚晓光 侯克鹏[2] 王悦青 Xing ZhiHua 1 Sha Bin 1 Shang Xiaoguang 2 Hou Kepeng 2 Wang Yueqing 2(1.Yuxi Dahongshan Mining Co.,Ltd.;2.School of Land Resources Engineering,Kunming University of Science and Technolog)

机构地区：[1]玉溪大红山矿业有限公司 [2]昆明理工大学国土资源工程学院

出　　处：《现代矿业》2018年第10期189-194,共6页Modern Mining

摘　　要：为有效分析地压活动对矿山地下开采的影响,采用3D-σ软件对大红山铁矿Ⅲ~#、Ⅳ~#矿体的开采过程进行了数值模拟分析。结果表明:(1)现阶段Ⅲ~#、Ⅳ~#矿体北盘区顶板及矿柱整体稳定性相对较好,没有出现大的地压显现现象,说明顶板及矿柱即便会出现局部破坏,也不影响整体稳定性;(2)在380 m N2、N3、N4盘区充填的基础上,开采380 m NH1、NH2、NH3盘区时的地压活动强度小于不充填时的地压活动,但在不充填的前提下开采380 m NH1、NH2、NH3盘区也能满足安全要求;(3)从开采过程的应力、位移、安全率及塑性区的分布规律看,建议首先开采380 m NH2盘区,最后开采380 m NH1、NH3盘区;(4)在预留保安矿柱的前提下,当主矿体开采至340 m水平时,不会对Ⅲ~#、Ⅳ~#矿体采区造成影响,建议在开采过程中对盘区顶板及矿柱进行地压监测,对顶板及矿柱的受力情况进行分析,以便及时掌握顶板、矿柱的受力形式。In order to analyze the influence of ground pressure activities to underground mining,the mining process of Ⅲ # and Ⅳ # orebody of Dahongshan Iron Mine is simulated and analyzed based on 3D-σ software.The study results show that：①at present,the stability of the north panel roof and pillar of Ⅲ # and Ⅳ # orebody is relatively good,the phenomenon of ground pressure appearance with large scale is not existed,which indicated that damage phenomenon will be appeared in the local area of roof and pillar,but the whole stability of roof and pillar can not be affected;②based on the filling of 380 m N2,N3 and N4 pannel,the ground pressure activities strength of the mining operation of 380 m NH1,NH2 and NH3 pannel is lower than the ones of 380 m NH1,NH2 and NH3 pannel without filling operation,however,the safety requirements can also be met by the mining operation of 380 m NH1,NH2 and NH3 pannel without the filling operation of 380 m N2,N3 and N4 pannel;③according to the distribution regularities of stress,displacement,safety rate and plastice zone of the mining process,it is suggested that the 380 m NH2 pannel can be mined firstly,and 380 m NH1and NH3 pannel can be mined finally;④under the premise of reserving security pillar,when the mining operation of the main orebody advances to 380 m level,the influence of the mining operation of the main orebody to the Ⅲ # and Ⅳ # orebody mining areas can be ignored,besides that,it is suggested that ground pressure of pannel roof and pillar should be monitored during the mining process,so as to analyze the stress condition of roof and pillar and timely grasp the stress form of roof and pillar.

关 键 词：地下开采 3D-σ 地压活动 矿体稳定性 

分 类 号：TD861.1[矿业工程—金属矿开采] TD31[矿业工程—矿山开采]