放顶煤工作面顶板岩层结构及顶板来压计算

STRUCTURE OF ROOF ROCKS IN SUB LEVEL CAVING FACE AND CALCULATION OF ROOF WEIGHTING

基于“弹性板与铰接板结构”力学模型，把中厚煤层开采中采场矿压计算的分析方法推广到放顶煤工作面顶板来压计算中；针对顶板岩层的结构特征和开采技术条件，提出了完全承载层、过渡层和非承载层的基本判据；通过对典型实例的解算证实，“弹性板与铰接板结构”力学模型在放顶煤工作面顶板来压计算中仍然是一种实用的计算方法．

Based on model of “structure of elastic plate and hinged plate” the method for calculating the ground pressure in the workings of medium thick coal seam is applied to calculation of roof weighting in sub level caving face.Basic criteria for judging the fully loading layer, transitional layer and non loading layer are respectively proposed in accordance with structure of roof as well as the mining and technical conditions. And these criteria are verified by typical examples. This model is also a practical method for calculation of roof weighting in sub level caving face.