深部金矿上向水平充填采场地压活动规律研究

    Study on the pressure activity law of upward horizontal filling mining site in deep gold mine

    • 摘要: 随着浅部资源开采的逐渐枯竭,国内外矿山的开采深度日益加深。在深部开采过程中,工程围岩易出现顶板垮塌、岩爆等地压灾害现象。本次研究以某深井金矿山为工程背景,在对其开展现场深部开采技术条件分析的基础上,利用数值模拟方法,建立了两个−940 m水平的数值模型,分别研究了开采过程中的采动地压活动规律和应力扰动范围规律,获得了不同开采尺度下的采场围岩应力场、位移场和塑性区演化特征,构建了上向水平分层开采过程的围岩扰动影响范围判识模型,建立了开采活动所造成的应力扰动最远距离随开采进程进行而变化的函数,揭示了深部开采区域总体地压分布特征及其影响特征,为矿山深部开采过程中的安全防控提供有利技术支撑。

       

      Abstract: With the gradual depletion of shallow resource extraction, the mining depth of mines at home and abroad is deepening. In the process of deep mining, the surrounding rock of the project is prone to ground pressure disasters such as roof collapse and rock burst. This study takes a deep gold mine as the engineering background, based on an analysis of the on-site technical conditions of deep mining, by using numerical simulation methods, two numerical models at a −940 m level are established, separately studied the law of ground pressure activities of mining-induced and the range of stress disturbance during the mining process, obtained the evolution characteristics of the surrounding rock stress field, displacement field, and plastic zone of the mining site under different mining scales, constructed a discriminant model of the influence range of surrounding rock disturbance in the upward horizontal layered mining process, established the function of the maximum distance of stress disturbance caused by mining activities changing with the mining process, revealed the overall distribution characteristics of ground pressure in deep mining areas and their influencing features, and provide effective technical support for safety prevention and control in deep mining operations.

       

    /

    返回文章
    返回