摘要
为了进一步研究浅埋矿体开采过程中隧道开挖引起的地表沉降,利用FLAC3D软件数值模拟了风化砂岩中浅埋隧道的开挖过程,研究了风化砂岩的力学参数(弹性模量、泊松比、凝聚力和内摩擦角)对地表沉降的影响。数值模拟研究结果表明:风化砂岩的弹性模量与地表沉降之间存在反相关关系,泊松比与地表沉降之间存在正相关关系,凝聚力和内摩擦角与地表沉降之间不存在相关关系,地表沉降曲线随着弹性模量的增加(或泊松比的减小)而趋于平缓,地表沉降最大值随着风化砂岩弹性模量的增加(或泊松比的减小)而减小。研究成果可为我国矿山隧道开挖引起的地表沉降预测和安全分析提供参考。
In order to accurately study the surface settlement caused by excavating shallow tunnels, the process o{ excavating shallow tunnels in weathered sandstone were simulated by FLAC3D software. The effects of mechanical parameters for weathered sandstone （elastic modulus, poisson＇s ratio, cohesion and internal friction angle） on surface settlement were studied. The results of study on numerical simulation indicated that the in-verse correlation in weathered sandstone existed between elastic modulus and surface settlement and the positive correlation between poisson＇s ratio and surface settlement. There was no corre- lation between cohesion, internal friction angle and surface settlement. The surface settlement curve tended to be gentle with the increase of elastic modulus （or the decrease of poisson＇s ratio） and the maximum surface settlement decreased with the increase of e- lastic modulus （or the decrease of poisson＇s ratio）. The research results could provide a reference for prediction and safety analysis of surface settlement caused by excavating shallow tunnels in mines in China.
作者
叶红
YE Hong(School of Transportation Engineering, Wuhan Technical College of Communications,Wuhan Huhei 430065 ,Chin)
出处
《化工矿物与加工》
CAS
北大核心
2017年第2期43-46,共4页
Industrial Minerals & Processing
基金
国家自然科学基金面上项目(51374163)
湖北省教育厅科学技术研究自然科学类项目(B2016566)
湖北省自然科学基金面上项目(2014CKB499)
关键词
浅埋隧道
地表沉降
数值模拟
风化砂岩
shallow tunnel
surface settlement
numerical simulation
weathered sandstone
