【摘 要】
：
This paper investigated the stress evolution, displacement field, local deformation and its overall distri-bution, and failure characteristics of the anchorage
【机 构】
：
State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining a
论文部分内容阅读
This paper investigated the stress evolution, displacement field, local deformation and its overall distri-bution, and failure characteristics of the anchorage structure of surrounding rock with different rockbolt spacing through the model experiments. The influences of the pre-tightening force and spacing of rock-bolt on the support strength of the anchorage structure of surrounding rock were analyzed by the sim-ulation using FLAC3D numerical software. The support scheme of the excavated roadway was then designed, and the effectiveness of this support scheme was further verified by the displacement measure-ment of the roadway. The results showed that the maximum displacement between the roof and floor of the west wing track roadway in Kouzidong coal mine, China is about 42 mm, and the maximum displace-ment between its both sides is about 72 mm, indicating that the support scheme proposed in this study can ensure the stability and safety of the excavated roadway.
其他文献
The vibration of dusty surfaces inevitably causes re-entrainment of particles into the atmosphere.Given that movement of mineral dust particles deposited on a s
围绕学前儿童的文学启蒙教育来说,其重要性在所有的智力启迪方面占有着不可替代的地位.而文学作为一门人文类文学,在启蒙教学中又承担着作为构建幼儿精神世界基石的重要责任.
幼儿的自我意识发展特别是自我评价,在上幼儿园的三年中是随教师的评价逐渐形成的,这种自我意识对其一生的是非善恶的评判、道德标准有着重要的影响,因此,幼儿教师对幼儿的表
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.
素质教育要求我们要面向全体学生, 使学生的思想道德、文化科学、劳动技能、身体心理素质得到全面和谐地发展,个性特长得到充分的培育. 这是一项长期的、具有划时代意义的改
词汇学习是英语学习的基础,只有积累丰富的词汇才能提高的阅读理解和写作能力,但是英语词汇的学习既枯燥又无味,又费时费力,要提高教学质量,需要教师创新教学方法,运用情境教
Recently,we have extended the kinetic theory of granular flow (KTGF) to include friction between the spherical particles and tested it in rectangular geometries
小朋友们从幼儿园进入到小学,对于小学的一切都是陌生的,无知的.甚至很肯可能不清楚小学数学是什么,在六年的小学生活中该做什么.小学数学在小学教育教学课程中与小学语文有
在全国推进素质教育的今天,体育教育要义不容辞的担当起历史的重担,尽快地改变落后的状态,以适应实施素质教育的需要.随着素质教育的全面推进,体育教育面临着新的机遇和挑战,
本期做客变量的是房多多创始人兼CEO段毅。从事房地产交易十余年的段毅,见证了房地产销售从“黄金时代”走向“白银时代”。他创立的房多多,是国内第一家互联网售房平台,采用