火成岩侵入区巷道冒顶机理及支护效果

发布时间：2018-11-19 13:14

【摘要】：针对双鸭山东保卫煤矿-500 m水平西翼轨道大巷过火成岩侵入区发生局部漏冒现象,采用现场实测、实验室试验、理论分析和数值模拟相结合的方法分析得出,侵入区火成岩具有遇水软化特性,巷道围岩裂隙发育、范围较深,局部支护强度不足是导致漏冒发生的主要原因。通过大巷围岩破坏及漏冒特征分析,研究得到围岩最大主应力与竖直方向夹角是造成巷道产生非对称变形及漏冒特征的主要因素,当角度达到45°左右时,巷道围岩塑性区分布特征与大巷围岩破坏特征及漏冒区特征相符。同时对支护参数进行分析,提出合理的漏冒区处理措施,可为分析同类巷道漏冒及围岩破坏现象提供技术参考。
[Abstract]:In view of the local leakage phenomenon in the igneous rock intrusive area in the west wing track roadway of -500m level in Dongbao Coal Mine of Shuangyashan Mountain, the method of field measurement, laboratory test, theoretical analysis and numerical simulation is used to analyze the phenomenon. The igneous rock in the intrusive area has the characteristics of water softening, the cracks in the surrounding rock of the roadway are developed, the range is deep, and the local support strength is insufficient, which is the main cause of the leakage. Based on the analysis of failure and leakage characteristics of roadway surrounding rock, it is found that the angle between maximum principal stress and vertical direction of surrounding rock is the main factor causing asymmetric deformation and leakage characteristics of roadway, when the angle is about 45 掳, The distribution of plastic zone of roadway is consistent with that of surrounding rock failure and leakage zone of roadway. At the same time, the supporting parameters are analyzed, and the reasonable treatment measures are put forward, which can provide a technical reference for analyzing the phenomenon of similar roadway leakage and surrounding rock failure.
【作者单位】：中国矿业大学(北京)资源与安全工程学院;黑龙江工业学院资源工程系;
【基金】：国家自然科学基金资助项目(51434006,51774288,51704294)
【分类号】：TD353

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