Reasonable Width Calculation and Analysis of Artificial Pillar in Deep Mining

摘要：  稀有贵重金属矿石深部回采时，为设计人工矿柱的几何参数，提出了深部回采人工矿柱合理宽度计算公式。针对高应力及大扰动，根据普氏地压学说理论，阐明了深部开采人工矿柱承载机理，从推导的公式中分析得到影响人工矿柱合理宽度的关键因素是回采跨度与回采深度，并进行了二者影响度的计算分析。结果表明：矿体回采跨度对人工矿柱宽度的影响度要远大于矿体的回采深度。结合某金矿工程实例，计算了深部回采人工矿柱的合理宽度，通过现场试验验证了公式计算的合理性及关键因素的影响度。

关键词: 人工矿柱；合理宽度；回采跨度；回采深度；影响度

Abstract:  To design the geometric parameters of artificial pillar for deep mining，a new formula is developed to calculate the reasonable width of artificial pillar．Considering high-stress and large-disturbance in deep mining，the bearing mechanism of artificial pillar is clarified based on P’s theory．Through deduced formulas，mining span and mining depth are determined as the main factors affecting the reasonable width of artificial pillar，and the influence degrees of the factors are also calculated．The results indicate that the influence of mining span on the width of artificial pillar is greater than that of mining depth．The reasonable width of artificial pillar is calculated for deep mining in accordance with the engineering practice of one gold mine，and the rationality of formula and the influence degree of key factors are validated through field test．

Key words: artificial pillar, reasonable width, mining span, mining depth, influence degree