摘要
针对南山铁矿现有主采场凹山采场挂帮矿开采、回采过程中的边坡稳定性问题,采取稳定性监测雷达、深部多点位移计和钻孔测力计3种监测手段对边坡变形进行实时监测,建立边坡表面位移、深部位移及深部应力立体监测网。根据监测分析得出如下结论:爆破振动是影响边坡稳定性的主要外因,优势结构面是影响边坡稳定性的主要内因;将边坡内部应力变化率作为边坡失稳的判据,相较于位移变化率具有超前性;建立边坡表面位移、深部多点位移和深部应力监测的多元信息监测网,能够有效地对边坡的稳定性进行预测,确保采场挂帮矿的安全开采。
In view of the slope stability problems in the process of development and mining of hanging wall ore of Washan pit, the main pit of Nanshan Iron Mine, three monitoring methods including monitoring radar of stability, deep multi-point displacement meter and drilling dynamometer are adopted to realize real-time monitoring on slope and to establish a three-dimensional monitoring network of slope surface displacement, deep displacement and deep stress. According to monitoring and analysis, it is concluded that ： blasting vibration is the main external factor affecting slope stability, and the preferred structural plane is the major internal factor affecting slope stability; Slope internal stress rate is considered as a criterion of the slope instability and is more advanced compared with the displacement rate;The multivariate information monitoring network of the slope sur- face displacement, deep multi-point displacement and deep stress monitoring is established to effectively predict the stability of the slope and ensure mining safety of hanging wall ore at stope.
出处
《金属矿山》
CAS
北大核心
2016年第2期141-145,共5页
Metal Mine
关键词
边坡稳定性
多元监测
挂帮矿开采
失稳判据
Slope stability, Multivariate information monitoring, Mining of hanging wall ore, Instability criterion
