采场影响区围板发育的合理参数

O. Khomenko, M. Kononenko, A. Kosenko
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Studies of changes in the stability of walling development waies in the zones of influence of drawn stopes of the first and second stages of mining made it possible to establish that the stability of fringedrifts is influenced by radial stresses that arise around the drawn stopes. This necessitates taking into account the nature and degree of tension of the rock mass in the zone of unloading drawn stopes, in the process of choosing the type of support for preparatory fringedrifts, the service life of which is equal to the time of mining ore reserves in the level. At the same time, empirical formulas for calculating the magnitude of destruction of a rock mass in the roof of fringedrifts of the lying and hanging walls were obtained. On the basis of which a method for calculating the parameters of the roof bolting of walling development waies has been developed. Scientific novelty. The dependences of the magnitude of the destruction of the rock mass in the roof of the fringedrifts of the hanging and lying walls, depending on the distance to the contour of the ore deposit, the depth of the fringedrifts, and the uniaxial compression strength of the rocks, have been established. Practical implication. A method has been developed for calculating the parameters of the roof bolting of development waies, taking into account the change in the stress state of the array of drawn stopes of the first and second stages of mining. 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引用次数: 0

摘要

目的。考虑第一和第二阶段采场卸荷区岩体应力状态的变化,建立合理的围墙开发参数的计算方法。方法。为确定离宿主岩与矿床接触面不同距离的上、下盘边缘漂移区周边应力分布规律,采用综合分析和归纳前人研究成果的方法,利用能量法和统计数据处理方法对发育区周边岩体应力-应变状态进行分析研究。结果。对采矿第一阶段和第二阶段采场影响区围壁发育巷道稳定性变化的研究使人们有可能确定,边缘漂移的稳定性受到采场周围产生的径向应力的影响。这就要求在选择准备边缘漂移支护类型的过程中,考虑到卸放采场区岩体的受力性质和程度,其使用寿命等于开采水平内矿石储量的时间。同时,得到了计算横盘和上盘边缘漂移顶板岩体破坏强度的经验公式。在此基础上,提出了一种计算墙体开发井锚杆支护参数的方法。科学的新奇。已经建立了悬盘和卧盘边缘漂移顶板岩体破坏程度的依赖关系,这取决于到矿床轮廓的距离、边缘漂移的深度和岩石的单轴抗压强度。实际的含义。提出了一种考虑一、二期采场阵列应力状态变化的开发巷道锚固参数计算方法。关键词:铁矿,开发方式,岩体压力,锚固,应力-应变状态,放矿
本文章由计算机程序翻译,如有差异,请以英文原文为准。
RATIONAL PARAMETERS FOR WALLING DEVELOPMENT WAIES IN THE ZONES OF INFLUENCE OF DRAWN STOPES
Purpose. To develop a methodology for calculating the rational parameters for walling development waies, taking into account changes in the stress state of the massif in the unloading zones of the drawn stopes of the first and second stages of mining. Methodology. To determine the patterns of stress distribution around the fringedrifts of the lying and hanging walls, located at different distances from the contact of the host rocks with the ore deposit, an integrated approach was used, including the analysis and generalization of previous studies, analytical studies of the stress-strain state of the rock mass around development waies, using the energy method and statistical data processing. Results. Studies of changes in the stability of walling development waies in the zones of influence of drawn stopes of the first and second stages of mining made it possible to establish that the stability of fringedrifts is influenced by radial stresses that arise around the drawn stopes. This necessitates taking into account the nature and degree of tension of the rock mass in the zone of unloading drawn stopes, in the process of choosing the type of support for preparatory fringedrifts, the service life of which is equal to the time of mining ore reserves in the level. At the same time, empirical formulas for calculating the magnitude of destruction of a rock mass in the roof of fringedrifts of the lying and hanging walls were obtained. On the basis of which a method for calculating the parameters of the roof bolting of walling development waies has been developed. Scientific novelty. The dependences of the magnitude of the destruction of the rock mass in the roof of the fringedrifts of the hanging and lying walls, depending on the distance to the contour of the ore deposit, the depth of the fringedrifts, and the uniaxial compression strength of the rocks, have been established. Practical implication. A method has been developed for calculating the parameters of the roof bolting of development waies, taking into account the change in the stress state of the array of drawn stopes of the first and second stages of mining. Keywords: iron ore, development way, rock pressure, roof bolting, stress-strain state, drawn stope.
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