Numerical modeling for further understanding of roadway junction stability behaviour at deep undergr

来源 :Journal of Coal Science & Engineering(China) | 被引量 : 0次 | 上传用户:dhalbert
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
The review and numerical analysis had been conducted further understand the deformation and failure beahviour of roadway junctions,associated with the different geometrical characteristics,various depth of cover,different mechanical properties around the junction and different construction sequences as well as different construction ad- vances during the roadway junction construction.The results confirme that the simple un- derground structure is more stable than complicated structures,and comparing with dif- ferent geometrical shapes of the two-dimensional roadway junctions,the most unstable one is the four way cross junction,which is the most commonly used in coal mines.On the other hand,the stability of the junction is not linearly related to the depth of cover,the sig- nificant effect only occurred when the depth of cover reached to 1 000 m.Also,with grad- ual degradation of rock mass,the deformation and failure around the junction increased significantly and nonlinearly.The modeling also conductes on the construction sequence for the junction,it is suggested that,during the junction construction,all the additional roadway should be constructed with the direction of moving away from,rather than for- ward to the junction.Finally,the construction advance is also considered for the junction development.It is suggested that when the construction is carried out around the junction, a small excavation advance,such as 1 m or 2 m is adopted for keeping small interruption on the existed roadway or junction. The review and numerical analysis had been conducted further understand the deformation and failure beahviour of roadway junctions, associated with the different geometrical characteristics, various depth of cover, different mechanical properties around the junction and different construction sequences as well as different construction ad- vances during the roadway junction construction.The results confirme that the simple un- derground structure is more stable than complicated structures, and comparing with dif- ferent geometrical shapes of the two-dimensional roadway junctions, the most unstable one is the four way cross junction, which is the most commonly used in coal mines.On the other hand, the stability of the junction is not linearly related to the depth of cover, the sig- nificant effect only occurred when the depth of cover reached 1 000 m.Also, with grad- ual degradation of rock mass, the deformation and failure around the junction increased significantly and nonlinearly. modeli ng also conductes on the construction sequence for the junction, it is suggested that, during the junction construction, all the additional roadway should be constructed with the direction of moving away from, rather than for-ward to the junction. Finally, the construction advance is also considered for the junction development. It is suggested that when the construction is carried out around the junction, a small excavation advance, such as 1 m or 2 m is adopted for keeping small interruption on the existed roadway or junction.
其他文献
Presented measurement results of roof rocks and wall rock movements of un- derground development workings after their drifting.The research was carried out in
请下载后查看,本文暂不支持在线获取查看简介。 Please download to view, this article does not support online access to view profile.
期刊
Based on the complexity of mine stratum and coupling of the multi-frequency for the damage of mine stratum,using the method of on-site inspection and mathemati
由于受地理、气候、环境等自然系统的影响,水文系统的变化一直存在着。人类诞生以来,有了人类活动的参与,水文系统在自然演变的规律下,又受到人类活动的干扰,尤其是工业革命以来的
城市边缘区作为一个特殊的区域空间,在城市发展过程中起着极其重要的作用,它是城市和乡村联系的纽带,为城市生产和生活日益扩张提供后备空间.城市边缘区土地利用结构对城市和
随着“数字地球”的提出及现代地理信息系统的发展,越来越多的行业开始应用GIS技术解决本行业的问题。在信息社会的今天,各行各业都在进行数字化管理,我国土地信息数字化工程作
江泽民同志关于“三个代表”的论断,是在新的条件和实践的基础上,对我们党历来坚持的若干基本原则和原理,加以综合、梳理和提炼,从而形成的一个更为鲜明、集中、概括和统一
由于县域的经济基础、收入水平、消费政策、交通通达性、文化背景、居民消费习惯以及消费心理等方面各异,会导致县域间消费水平的不平衡。对于社会经济发展相对落后的地区而
美国公共卫生学会(APHA)成立于1872年,已有129年历史,具有5.5万余名会员.从每年的年会题目看,函盖了公共卫生各专业,包括公共卫生、环境卫生、职业卫生、内科、牙科等.