基于损伤分析的复合顶板煤巷离层判定  

Separation Layer Determination of Composite Roof in Coal Roadway Based on Damage Analysis

作　　者：陈光林 王红胜 

机构地区：[1]陕西澄合矿业有限公司二矿,陕西渭南715200 [2]西安科技大学能源学院,陕西西安710054

出　　处：《煤矿安全》2017年第11期191-193,197,共4页Safety in Coal Mines

基　　金：国家重点基础研究发展计划(973计划)资助项目(2015CB251600);西安科技大学能源学院青年教工创新资助项目(2015-NY-010)

摘　　要：针对复合顶板极易离层张拉破坏而失稳的特点,基于围岩的损伤分析,给出复合顶板离层判定模型。该模型采用Weibull统计函数和Mises屈服准则,解析围岩损伤参量,结合复合顶板岩层挠曲计算式,由下向上逐层判定复合顶板离层位置,并计算离层值。计算结果表明,该模型成功地应用于复合顶板离层判定,与现场实测值误差仅3%。According to the characteristics that the composite roof is easy to appear failure and instability due to tensile damage,the decision model for separation layer of composite roof is given based on the damage analysis of surrounding rock. The Weibull statistical function and Mises yield criterion are used to analyze the damage parameters of the surrounding rock. Combined with the deflection calculation formula of composite roof rock, the separation layer position of composite roof is determined from the bottom up and the separation layer value is calculated. The results show that the modified model is successfully applied to the separation layer determination of composite roof, and the actual measured error is only 3%.

关 键 词：复合顶板 煤巷 离层判定 损伤分析 力学结构模型 

分 类 号：TD327.2[矿业工程—矿井建设]