覆岩中托板的判别与应用

Differentiation and application of “holding-plate” of overlying strata

为了应用弹性板理论对覆岩中的托板进行了受力分析和研究,建立了托板在一定条件下存在与失稳的判别方法,阐明了托板存在与失稳和采空区尺寸的关系问题,研究了覆岩中存在多重托板的判别与计算方法。在理论上推导出了托板失稳时的等效垮距计算的数学模型,该模型简单、实用,并应用实例对其进行了验证。还分析了托板在岩层与地表移动、局部开采、矿山压力以及离层注浆技术中的作用等内容。

On the basis of ＂holding-plate＂ theory, the mechanics analysis of ＂holding-plate＂ of overlying strata is further discussed with elastic slab theory, and its differentiation method between existence and rupture under a certain condition was set up in this paper. And then the relation between the existence and rupture of holding-plate and the dimension of mined-out area is expounded, and the differentiation and computation method of multi- ＂holing-plate＂ is studied. The numeric theoretic model of the equal rupture length when holding-plate is rupturing is simple and practical, and it is proved with application. In the end, the roles of holing-plate in the strata or ground moving, local mining, mine pressure, separated strata grouting technique etc. are analyzed.