连续大面积开采托板控制岩层变形模式的研究

STUDY OF DEFORMATION MODEL OF A CONTROLLING HOLDING-PLATE WHEN LARGE AREA IS EXTRACTED CONTINUOUSLY

本文从三维空间角度来研究地下连续大面积开采时托板控制岩层的变形破坏规律，研究地表沉陷与托板破断失稳的本质联系和相关特征。考虑到不同地质采矿条件对托板的边界约束不同，将托板的各种力学变形机制分为８１种模式。运用薄板小挠度理论对其中最常见的２３种模式进行了研究，提出了托板控制岩层挠曲破断的失稳原则及地表沉陷的评估思想。文中除给出对采矿工程中控制地表沉陷与矿山压力有意义的图表外，还提供了几个实例。

This paper studies the deformation and failure of a controlling holding-plate rock stratum when large area is extracted continuously, from the view point of 3-D space, it also studies the essential relationship between surface subsidence and fracture and instability holding-plate as well as relevant features.Since restraints of various geological and mining conditions to holding-plate boundaries are different, the deformation mechanism of holding-plate is classifiedinto 81 kinds of models. Based on slight-deflection theory of holding-plate, 23kinds of mostly common models are studied. Concept of holding-plate breaking as well as the criterion for evaluation of surface subsidence is put forwand. In addition to charts and tables which are meaningful to control surface subsidence and rock pressure in mining engineering, examples are also provided.