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顾永强，王文峰
( 内蒙古科技大学 建筑与土木工程学院，内蒙古 包头 014010；)
关键词：复合巷道； 薄弱部位；数值模拟；支护
中文分类号：TD353 .6 文献标识码：A
摘要：复合巷道支护是国内外巷道支护的难题之一，而复合巷道在我国煤矿巷道中有着广泛的分布。煤巷的开挖位置一旦确定，其围岩结构状态就不再改变，岩层结构上的薄弱部位即为巷道的关键部位。巷道顶板离层破坏影响因素很多，通过对煤层直接顶、老顶的厚度以及岩体的强度等分析，确定其对顶板离层的影响程度，并结合力学分析，建立顶板离层力学模型，计算出顶板离层深度，另外还利用 FLAC3D 模拟软件，模拟复合巷道在不同环境下老顶与直接顶的变形量，从而得出引起顶板离层破坏的影响因素。
Analysis on the Factors of the Old Roof and the Direct Roof Separation in Coal Mine
GU Yong-qiang, Wang Wen-feng
(Architecture and Civel Engineering School, Inner Mongolia University of Science and Technology，Baotou 014010，China )
Key words: compound wall rock roadway; weak part; numerical simulation; support
Abstract: The supporting of the compound wall rock roading is one of the difficult problems, the compound wall rock road way distribute widely in the coal mine tunnel of our country. The state of the rock structure cannot be changed when the excavation location is determined, the weak part of the rock is the key part of the roadway. Laneway roof separation failure is influenced by many factors, through the analysis of the coal seam roof, original roof thickness and the strength of rock mass. ascertained the degree of its effect on the roof separation, combined with the mechanical analysis, built roof separation mechanical modal, calculated the depth of the roof separation, in addition, simulated the composite roof deformation of the original roof and seam roof in different environment by FLAC3D software, thus obtained the factors which caused the damage of roof separation.