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作者从岩体强度、地壳应力、岩体弹性与应力集中、矿柱应力、矿柱设计等方面阐述了房柱法地压控制的问题。认为应力测量有助于控制地压。一、绪言用房柱法开采块状矿体时,总希望尽可能地提高矿石回采率。但是,回采率过高又有发生冒顶的危险。此外,在被充填的采空区内回采矿柱时,应从地压和采矿费用方面来考虑一次回采与二次回采(回采矿柱)的比例关系,以及被充填物所包围的矿柱应如何回采等问题。无论哪个问题对于用房柱采矿法开采块状矿体来说(从地压角度来看),尚待研究的问题都很多。在日本,用坑内法开采块状矿体的矿山很多。最近,连石灰石也有采用大规模坑内开采的趋势。这些矿山常发生大小冒落事故。南非
The author elaborates the problem of ground pressure control by the method of housing and pillar in terms of rock mass strength, crustal stress, rock mass elasticity and stress concentration, pillar stress and pillar design. Stress measurement is thought to help control ground pressure. I. INTRODUCTION When mining the massive ore body by the method of house and column, it is always hoped that the ore recovery rate will be raised as much as possible. However, there is a risk of falling over when the recovery rate is too high. In addition, when recovering pillars in the filled goaf, consideration should be given to the ratio of primary and secondary recovery (recovery pillars) from the ground pressure and mining costs and how the pillars surrounded by the filling should be Mining and other issues. Whichever problem is the problem to be solved for the mining of massive orebodies using post-column mining (from a ground pressure perspective). In Japan, there are many mines producing massive orebodies using pit methods. Limestone has also recently been adopted for large-scale pit mining. These mines often occur the size of the accident. South Africa