【摘要】 采用现场实测及相似模拟技术研究大采高综采采场顶板结构特征,建立大采高综采采场的顶板控制力学模型。根据直接顶岩层结构不同,将大采高直接顶划分为I,II,III型3种类型,I型直接顶顶板载荷按给定载荷法或采高倍数法计算;II型直接顶暂不宜采用大采高开采技术;III型直接顶顶板控制应主要考虑直接顶关键层厚度、层位及工程力学特征,当直接顶关键层距离支架较近时,必须考虑冲击载荷影响。更多还原

【Abstract】 By using in-situ measured data and the physical simulation technique,the structural characteristics of roof control with large mining height are studied.The mechanical model of roof control for the coal face with large mining height was put forward.According to different strata structures of the immediate roof,the immediate roof of the large mining height is divided into three types:type I,type II,and type III.Immediate roof type I will be calculated according to the given loading method and multiplying mining height method.Immediate roof type II is not suitable for large mining-height technique.The roof control of immediate roof type III should consider the thickness,location and engineering mechanical characteristics of the key layer of immediate roof.When the key layer of the immediate roof is closer to support load,the influence of shock loading should be considered.更多还原