露天转地下开采边坡失稳动力冲击灾害演化机理  

Evolution Mechanism of Dynamic Shock Disaster Caused by Slope Instability in Transition from Open-pit to Underground Mining

作　　者：王云飞[1,2] 李长洪[3] 崔芳[2] 

机构地区：[1]河南理工大学深部矿井建设省重点学科开放实验室,河南焦作454000 [2]河南理工大学土木工程学院,河南焦作454000 [3]北京科技大学土木与环境工程学院,北京100083

出　　处：《矿冶工程》2013年第5期13-16,20,共5页Mining and Metallurgical Engineering

基　　金：河南省教育厅项目(13A440323);河南省高等学校深部矿井建设重点学科开放实验室开放基金(2011KF-08);河南理工大学博士基金(B2012-075)

摘　　要：以杏山铁矿为例,通过相似实验研究了地下矿体开采过程中边坡岩体的破坏形态,揭示了露天转地下开采边坡失稳导致的动力冲击灾害发生机理,即随着矿体的向下开采,边坡岩体会循环进入能量积蓄和突然释放的过程,导致坡体内部损伤微裂隙的迅速扩展贯通,使大范围的坡体滑移冲向地下采场上部覆盖层,对地下生产活动造成循环动力冲击灾害。With Xingshan Iron Mine as an example, failure modes of rock mass of slope during underground mining were studied through similarity experiments, revealing the occurrence mechanism of dynamic shock disaster caused by slope instability during transition from open-pit to underground mining. The transition from open-pit to underground mining will lead to a continuous process from energy accumulation to sudden release, resulting in some tiny fracture inside the slope rapidly expanded. Consequently, a wide range of landslide will occur down to the coveting layer of underground stope, causing continuous dynamic shock disaster to underground mining activity.

关 键 词：露天转地下 边坡失稳 动力冲击灾害 演化机理 

分 类 号：TD324[矿业工程—矿井建设]