厚砂土层斜井井壁应力分布规律三维光弹性模型试验  

Three-dimensional photoelasticity model test of inclined shaft on stress distribution in thick sand soil layer

作　　者：周檀君[1] 周国庆[1] 廖波[1,2] 张海洋 赖泽金[1] 陶祥令[1,3] ZHOU Tanjun ZHOU Guoqing LIAO Bo ZHANG Haiyang LAI Zejin TAO Xiangling(State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining ＆ Technology,Xuzhou 221008, China Depart- ment of Technology and Engineering Management, Zhejiang Gongshang University,Hangzhou 31 O018, China College of Energy and Transportation Engi- neering , Jiangsu Vocational Institute of Architectural Technology ,Xuzhou 221116,China)

机构地区：[1]中国矿业大学深部岩土力学与地下工程国家重点实验室,江苏徐州221008 [2]浙江工商大学技术与工程管理系,浙江杭州310018 [3]江苏建筑职业技术学校能源与交通工程学院,江苏徐州221116

出　　处：《煤炭学报》2017年第8期1979-1986,共8页Journal of China Coal Society

基　　金：国家自然科学基金资助项目(51104146);国家高等学校学科创新引智计划(111)资助项目(B14021)

摘　　要：以穿越厚砂土层的某煤矿主斜井为工程背景,设计了物理模型试验,建立了斜井井壁三维光弹性应力冻结试验方法。实现了考虑斜向倾角作用下穿越厚砂土层斜井井壁应力状态的三维试验模拟,并结合应力冻结后模型横、纵向切片光弹测试得到的全场最大剪应力等值线图对井壁应力随埋深、环向角度变化规律进行了分析。研究结果表明,井壁横向切片内应力水平和应力分布不均匀性均远大于纵向切片,最大剪应力的应力集中区域出现在井壁两帮内缘水平面±25°范围内,斜井井壁顶部最大剪应力大于底部;随斜井井壁埋深增加,纵向应力近似线性增加,但不同环向角度对应的应力增加速度差异较大,从而导致不同埋深位置,井壁内部应力的量值和分布规律均有差异。Taking the main inclined shaft of a coal mine across thick sandy soil layer as the engineering case, estab- lished a physical model for the inclined shaft wall with the three-dimensional stress-freezing photoelastic method. A three-dimensional simulation for the stress of inclined shaft wall across thick sandy soil layer was made under the con- sideration of inclined roadway inclination. The whole-field maximum shear stress contour map was obtained from the stress-freezing photoelastic test and the changes of shaft wall stress in relation to shaft depth and circumferential angle were also analyzed. According to the results, the internal stress and its uneven distribution of the transverse section of shaft wall were much greater than that of the longitudinal section. The maximum shear stress centered on the inner ed- ges of shaft wall sides at a range of ＋25~. The maximum shear stress on the top of inclined shaft wall was larger than the bottom. With the increase of shaft depth, the longitudinal stress showed a near-linear increase, but the rates of in- crease in relation to different circumferential angles differed greatly. Thus, the size and distribution of shaft wall inter- nal stress varied with different shaft depth.

关 键 词：斜井井壁 模型试验 应力分布规律 光弹性应力冻结法 

分 类 号：TD265.3[矿业工程—矿井建设]