【作者】 南世卿； 赵兴东； 高瑞永；

【Author】 Nan Shiqing~(1,2) Zhao Xingdong Gao Ruiyong~2(1. Center for Rock Instability and Seismicity Research,Northeastern University, Shenyang 110004 2.Tanggang Mining Co.,Ltd. Shirengou Ore Mine,Zunhua 063016)

【机构】 东北大学岩石破裂与失稳研究中心； 唐钢矿业有限公司石人沟铁矿；

【摘要】 露天转地下开采的矿山面临着一个主要问题就是境界矿柱的稳定性问题,境界矿柱留设的过薄,发生失稳破坏,可能造成突冒突涌灾害的发生;同时,境界矿柱留设的过厚,造成矿石资源的浪费。为此,本文应用极限平衡方法、岩石破裂过程分析系统(RFPA)以及FIAC对典型的境界矿柱进行分析和数值计算,确定合理的境界矿柱尺寸,为露天转地下开采的平稳过渡以及境界矿柱的稳定,提供可靠的理论分析。同时,该研究成果正在应用于石人沟铁矿露天转地下开采的生产实践之中,指导其露天转地下开采进行。更多还原

【Abstract】 The stability of boundary pillar, which can often be come across in mine shifting from open-pit to underground mining, is very important for safe production of underground mine. This paper is based on the practice of Shirengou Ore Mine from open-pit to underground mining, and the stability of boundary pillar at representative sections is calculated and analyzed by using methods of limit equilibrium and numerical simulation. By applying the limit equilibrium method and considering the thickness, span of boundary pillar, height of deposed rock and obliquity of ore mine, we respectively calculated the safety coefficient of all sections of boundary pillar. The safe thickness of boundary pillar has been modeled by the RFPA^2D（Rock Failure Process Analysis） system, including deformation and failure of boundary pillar during caving. At the same time, failure process of the different sections has been simulated. By calculation, the safety and danger section of boundary pillar has been predicted. It validates the designed boundary pillar thickness and conducts the production.更多还原