水平应力对三软巷道扩巷后围岩稳定性影响研究  

Study on stability of surrounding rock after expansion of Three Soft roadway by horizontal stress

作　　者：李亮 韩巨金 宋梓瑜 梁玉春[1] 翟宇[1] 秦常浩 Li Liang;Han Jujin;Song Ziyu;Liang Yuchun;Zhai Yu;Qin Changhao(Hebei Energy College of Vocation and Technology,Tangshan 063000,China)

机构地区：[1]河北能源职业技术学院,河北唐山063000

出　　处：《能源与环保》2023年第3期293-299,共7页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：国家自然科学基金青年基金(52104083);河北省大中学生科技创新能力培育专项项目(22E50394D)。

摘　　要：赵家寨矿12209运输巷沿空留巷的施工流程为“扩巷—充填”,扩巷后断面加大,受二次扰动影响,巷道的变形破坏呈现出新的特点,通过理论分析,计算得出12209运输巷扩巷后塑性区为2.28 m。使用数值模拟和相似模拟2种手段,研究了侧压系数分别为1.0、1.2、1.4、1.6、1.8、2.0时巷道的变形破坏规律。当侧压系数达到1.4后,在原巷道与新扩巷道底板交接处发生破坏,继续加压后,巷道开始失稳。现场监测巷道变形情况,其破坏规律与研究结果一致。The construction process of gob-side entry retaining for the 12209 transportation lane in Zhaojiazhai Mine is"lane expansion-filling".After the expansion,the cross-section increases,and the deformation and damage of the roadway show new characteristics due to secondary disturbance.Through theoretical analysis,it is calculated that the plastic zone after the expansion of the 12209 transportation lane is 2.28 meters.Using two methods of numerical simulation and similar simulation,the law of roadway deformation and failure is studied when the lateral pressure coefficients are 1.0,1.2,1.4,1.6,1.8,and 2.0.When the lateral pressure coefficient reaches 1.4,damage occurs at the junction of the original roadway and the floor of the newly expanded roadway.After continuing to pressurize,the roadway begins to lose stability.The deformation of the tunnel was monitored on site,and the failure pattern is consistent with the research results.

关 键 词：水平应力 回采巷道 扩巷 

分 类 号：TD823[矿业工程—煤矿开采]