摘要
为分析巷道过断层松散破碎带围岩变形破坏情况,采用数值模拟分析的方法进行分析。首先根据工程类比法确定新源煤矿SN-36皮带顺槽的支护方案为“锚网索+棚”,并对支护过程中的支护参数进行了优化设计。根据地质采矿条件,采用FLAC软件建立了新源煤矿巷道模拟的原始模型,并对巷道掘支后的围岩塑性区、围岩应力和变形量进行了分析,得到随着断层的逐步影响导致其变形增加,塑性区范围增大。塑性区越大,应力释放越厉害,围岩产生破坏也越大。分析巷道掘支后变形和应力分布特征,得出构造应力区是软岩巷道变形破坏的主要因素。
In order to analyze the deformation and failure of the surrounding rock of the roadway passing through the fault loose and fractured zone,the numerical simulation analysis method was used to analyze the deformation and failure.Firstly,according to the engineering analogy method,the support scheme of SN-36 belt groove in Xinyuan Mine was anchor cable+shed,and the support parameters in the support process were optimized.According to the geological mining conditions,the original model of roadway simulation in Xinyuan Coal Mine was established by FLAC software.The plastic zone,stress and deformation of surrounding rock after roadway excavation were analyzed.It was found that the deformation increased and the plastic zone scope increased with the gradual influence of faults.The larger the plastic zone,the more severe the stress release and the greater the damage of surrounding rock was.By analyzing the characteristics of deformation and stress distribution of roadway after excavation and support,it was concluded that the tectonic stress zone was the main factor of deformation and failure of soft rock roadway.
作者
刘国超
Liu Guochao(Sanyuan Shiku Mining Industry Corporation Ltd.,Shanxi Coal Transportation Group,Changzhi 047500,China)
出处
《煤炭与化工》
CAS
2020年第1期15-17,23,共4页
Coal and Chemical Industry
基金
国家自然科学基金(51274106)。
关键词
巷道围岩控制
数值模拟
巷道变形
松散破碎带
roadway surrounding rock control
numerical simulation
roadway deformation
loose fractured zone
