D0:10.13374/.issn1001-053x2012.03.004 第34卷第3期 北京科技大学学报 Vol.34 No.3 2012年3月 Journal of University of Science and Technology Beijing Mar.2012 底摩擦模型模拟露天转地下开挖采空区影响下边坡变 形破裂响应特征及其稳定性 尹光志12，》 李小双3，回李耀基3 1)重庆大学煤矿灾害动力学与控制国家重点实验室，重庆400030 2)重庆大学西南资源开发及环境灾害控制工程教育部重点实验室，重庆400030 3)国家磷资源开发利用工程技术研究中心，晋宁6506004)云南磷化集团有限公司，晋宁650600 ☒通信作者，E-mail:xsli2011@126.com 摘要以云南磷化集团晋宁磷矿6号坑口东采区深部缓倾斜中厚磷矿层露天转地下开采为工程背景，利用底摩擦模型实验 仪，进行了不同露天坑境界顶柱厚度边坡高度下的底摩擦模拟模型实验。结果表明：边坡的变形破坏响应特征可分为边坡岩 体小范围微破裂和松动→边坡岩体局部范围失稳破坏→边坡岩体整体向采空区滑落失稳破坏三个阶段，边坡岩体变形破坏 模式主要是采动边坡岩体向采空的拉裂、破断和滑移破坏.在边坡高度一定情况下，随着露天境界顶柱的厚度由30m逐渐减 小到20m和10m,边坡的稳定性与境界顶柱的厚度呈正比关系，20-30m是露天境界顶柱比较合理的厚度.在境界顶柱的厚 度一定情况下，边坡高度由60m增大到108m,边坡的稳定性与坡高的厚度呈反比关系，108m边坡转入地下开采后是不稳 定的. 关键词磷矿；露天开采：地下开采：采空区：边坡稳定性：模型实验 分类号TD871 Simulation on the deformation and failure response features and stability of a slope from open pit mining to underground mining under the effecting of excava- tion goaf by the floor friction model Y7 N Guangzhi,2),IXiao-shuang3,4回，lYao. 1)State key Laboratory of Coal Mine Disaster Dynamics and Control,Chongqing University,Chongqing 400030,China 2)Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering (Ministry of Education of China), Chongqing University,Chongqing 400030,China 3)National Engineering Research Center of Phosphate Resources Development and Utilization,Kunming 650000,China 4)Yunnan Phosphate Chemical Group Co.Ltd.Jinning 650600,China Corresponding author,E-mail:xsli2011@126.com ABSTRACT Based on the gently inclined medium thick phosphate rock at the deep part of the east mining section of Jinning-Six Mine,Yunnan Phosphate Co.Ltd.from open pit mining to underground mining,floor friction model tests under the condition of differ- ent slope heights and boundary thicknesses were carried out with a floor friction model instrument.The results show that the deformation and failure response features of the slope can be divided into three stages:fracture and loose in a small range,unstable failure in a local range,and instability failure in the whole range of slope rock sliding to the goaf.The main deformation and failure modes of the slope are tension cracking,breakage,and sliding failure.When the slope height is fixed,with the boundary thickness gradually decreasing from 30 m to 20 m and 10 m,the stability of the slope is directly proportional to the boundary thickness,and the reasonable boundary thickness is 20 m to 30 m.When the boundary thickness is fixed,with the slope height increasing from 60 m to 108 m,the stability of the slope is inversely proportional to the slope height,and the slope of 108m from open pit mining to underground mining is unstable. 收稿日期：2011-01-17 基金项目：云南磷化集团有限公司“十二五”科技支撑计划资助项目(2011BAB08B00)第 34 卷 第 3 期 2012 年 3 月 北京科技大学学报 Journal of University of Science and Technology Beijing Vol． 34 No． 3 Mar． 2012 底摩擦模型模拟露天转地下开挖采空区影响下边坡变 形破裂响应特征及其稳定性 尹光志1，2，3) 李小双1，3，4) 李耀基3，4) 1) 重庆大学煤矿灾害动力学与控制国家重点实验室，重庆 400030 2) 重庆大学西南资源开发及环境灾害控制工程教育部重点实验室，重庆 400030 3) 国家磷资源开发利用工程技术研究中心，晋宁 650600 4) 云南磷化集团有限公司，晋宁 650600 通信作者，E-mail: xsli2011@ 126． com 摘 要 以云南磷化集团晋宁磷矿 6 号坑口东采区深部缓倾斜中厚磷矿层露天转地下开采为工程背景，利用底摩擦模型实验 仪，进行了不同露天坑境界顶柱厚度边坡高度下的底摩擦模拟模型实验． 结果表明: 边坡的变形破坏响应特征可分为边坡岩 体小范围微破裂和松动→边坡岩体局部范围失稳破坏→边坡岩体整体向采空区滑落失稳破坏三个阶段，边坡岩体变形破坏 模式主要是采动边坡岩体向采空的拉裂、破断和滑移破坏． 在边坡高度一定情况下，随着露天境界顶柱的厚度由 30 m 逐渐减 小到 20 m 和 10 m，边坡的稳定性与境界顶柱的厚度呈正比关系，20 ～ 30 m 是露天境界顶柱比较合理的厚度． 在境界顶柱的厚 度一定情况下，边坡高度由 60 m 增大到 108 m，边坡的稳定性与坡高的厚度呈反比关系，108 m 边坡转入地下开采后是不稳 定的． 关键词 磷矿; 露天开采; 地下开采; 采空区; 边坡稳定性; 模型实验 分类号 TD871 Simulation on the deformation and failure response features and stability of a slope from open pit mining to underground mining under the effecting of excava￾tion goaf by the floor friction model YIN Guang-zhi 1，2，3) ，LI Xiao-shuang1，3，4) ，LI Yao-ji 1，3，4) 1) State key Laboratory of Coal Mine Disaster Dynamics and Control，Chongqing University，Chongqing 400030，China 2) Key Laboratory for Exploitation of Southwestern Resources and Environmental Disaster Control Engineering ( Ministry of Education of China ) ， Chongqing University，Chongqing 400030，China 3) National Engineering Research Center of Phosphate Resources Development and Utilization，Kunming 650000，China 4) Yunnan Phosphate Chemical Group Co． Ltd． ，Jinning 650600，China Corresponding author，E-mail: xsli2011@ 126． com 收稿日期: 2011--01--17 基金项目: 云南磷化集团有限公司“十二五”科技支撑计划资助项目( 2011BAB08B00) ABSTRACT Based on the gently inclined medium thick phosphate rock at the deep part of the east mining section of Jinning-Six Mine，Yunnan Phosphate Co． Ltd． from open pit mining to underground mining，floor friction model tests under the condition of differ￾ent slope heights and boundary thicknesses were carried out with a floor friction model instrument． The results show that the deformation and failure response features of the slope can be divided into three stages: fracture and loose in a small range，unstable failure in a local range，and instability failure in the whole range of slope rock sliding to the goaf． The main deformation and failure modes of the slope are tension cracking，breakage，and sliding failure． When the slope height is fixed，with the boundary thickness gradually decreasing from 30 m to 20 m and 10 m，the stability of the slope is directly proportional to the boundary thickness，and the reasonable boundary thickness is 20 m to 30 m． When the boundary thickness is fixed，with the slope height increasing from 60 m to 108 m，the stability of the slope is inversely proportional to the slope height，and the slope of 108 m from open pit mining to underground mining is unstable． DOI:10.13374/j.issn1001-053x.2012.03.004