含软弱夹层煤巷层状顶板失稳机理与分类  

Instability mechanism and classification of lamellate roof with intercalated weak seam in roadway

作　　者：刘少伟[1] 徐仁桂 张辉[1] 郑新旺[1] 董士举[1] 张伟光[1] 

机构地区：[1]河南理工大学能源科学与工程学院,河南焦作454000 [2]内蒙古煤炭设计院,呼和浩特011705

出　　处：《河南理工大学学报（自然科学版）》2010年第1期23-27,共5页Journal of Henan Polytechnic University（Natural Science）

基　　金：河南省重点科技攻关项目(092102310312);2007年度国家安全生产科技计划项目(07-144);河南理工大学博士基金资助项目(B2006-21)

摘　　要：运用复合梁原理对含软弱夹层的煤巷层状顶板失稳模式进行理论分析,随着软弱夹层厚度的增加,顶板所受的最大拉应力逐渐变小,而且呈双曲线规律变化.软弱夹层厚度变化与围岩水平应力、位移和塑性区之间的关系进行数值模拟,研究了软弱夹层对锚杆支护煤巷层状顶板稳定性的影响.根据研究结果,以软弱夹层的厚度与其在顶板内的位置为指标对顶板进行分类,为煤巷锚杆支护参数设计提供了理论依据.Using the composite beam principle to perform a theoretical analysis to the coal roadway lamellate roof collapsing model with intercalated weak seam,it considers that with the intercalated weak seam thickness increasing,the maximum tensile stress of the roof becomes smaller and smaller,and appears hyperbolic curve alteration,and with the numerical simulation techniques,the relation of the intercalated weak seam thickness and horizontal stress between the displacement and the plastic zone is discussed.The influence of the roadway lamellate roof stabilization after the bolting in the intercalated weak seam thickness is presented.According to the study results,the proceed classification of the thickness and the position of the intercalated weak seam as an indicator to the roof is showed,which provides a theoretical basis for the designing the bolting parameters in roadway.

关 键 词：层状顶板 软弱夹层 顶板分类 

分 类 号：P237[天文地球—摄影测量与遥感]