膨胀特性对软岩巷道围岩变形规律的影响研究  

Research on the Effect of Dilatancy Characteristics to the Law of Surrounding Ground Deformation in Soft Rock Roadway

作　　者：程立朝[1] 陆庭侃[1] 

机构地区：[1]河南理工大学能源学院,河南焦作454003

出　　处：《河南理工大学学报（自然科学版）》2006年第6期461-464,共4页Journal of Henan Polytechnic University（Natural Science）

基　　金：河南省杰出人才创新基金资助项目(0621000400)

摘　　要：针对软岩巷道的特点,利用泥灰岩三轴试验结果,分析了膨胀特性对深井软岩巷道围岩稳定性的影响;利用最新的弹塑性理论研究成果,推导出了膨胀角与围岩变形的直接关系式;采用数值力学的研究方法,分析了软岩巷道周围体积膨胀与扩容现象.数值模拟结果表明:软岩巷道表面变形和巷道周边体积应变随膨胀角的变化均成非线性递增,膨胀角愈大,软岩巷道的围岩条件愈差,巷道周边围压越大,所需要的支护力就越大,这些重要结论为深井条件下软岩巷道工程提供参考.Based on the basic features of soft rock, the paper analyses that dilatancy characteristics is an important factor influencing upon surrounding ground stability of deep soft rock roadway. By outcomes of latest theory research, the direct formula about dilatancy angle and surrounding ground deformation is introduced. By studying method of numerical Mechanics, the volumetric dilatation of soft rocks around the tunnels is analyzed. The simulation results show that surrounding ground deformation and volumetric strain around soft rock roadway all change in nonlinearly progressively increasing rule with dilatancy angle, the bigger value of dilatancy angle, the worse the surrounding ground condition of soft rock roadway is, the bigger the peripheral pressure produce and the supporting load needed are. These solutions are an important reference to the engineering practice of the soft rock roadway in the deep mine condition.

关 键 词：软岩 膨胀角 数值模拟 

分 类 号：TD313[矿业工程—矿井建设]