【作者】 张文华；

【导师】 谷拴成；

【作者基本信息】 西安科技大学 ， 建筑与土木工程， 2010， 硕士

【摘要】 随着锚杆锚索支护技术的不断发展,一般地质条件下普通巷道的锚杆锚索支护技术已经相当成熟,近几年来,为了引进大采高设备,巷道的断面尺寸越来越大,现有的锚杆锚索的支护设计方法已经不能满足要求。能否解决好大跨度、大断面巷道的支护问题,是矿井开采规模的加大和安全生产技术的关键。本文给出了一套适合大断面锚杆锚索的支护参数设计方法。本文通过理论分析结合具体工程实例,对大断面巷道锚杆(索)支护技术进行了系统地研究。对锚杆(索)支护巷道失稳机理、巷道变形的影响因素和锚杆支护理论作了较为全面的分析。以柠条塔煤矿N1203工作面大断面锚杆(索)支护项目为工程背景,进行了大跨度、大断面锚杆(索)支护技术实践研究。通过传统设计方法和本文研究的设计方法进行支护参数方案对比,最终确定了锚杆(索)支护参数,并应用大型有限差分软件FLAC2D对锚杆(索)支护进行了稳定性分析。通过现场监测,对锚索与围岩的耦合支护参数进行了分析,总结提出“工程地质资料分析-初始设计-现场监测-信息反馈-修改设计”的动态信息设计方法。本文的研究与实践,使大断面巷道锚杆支护由工程类比上升到定量分析,为柠条塔同类巷道的锚杆支护设计提供了一定的工程参考依据。更多还原

【Abstract】 With the development of bolt supporting theory in our country’s coal, the technician do a lot of work, accumulate much information and get abundant experiences from supporting theory and practice. Recently pin timbering has been extensive used because the bolting of coal road has mellowed, however the problem of difficult tunnel reinforcement haven’t been solved properly, for example, wide span tunnel, heavy section. All in all, whether can we work out the problem is a critical issue for coal exploitation and safety in production.By means of theoretical analysis and field practice, bolt supporting of wide span tunnel is studied wholly and systematically. This paper summarizes the mechanism of destabilization in bolting roadway and supporting theory. Based on generalizing the method which the design of bolt supporting, this thesis study the parameter designing method which about bolt supporting in big section of rectangle tunnel. Through using the way that rectangle roadway equivalent ellipse, to determine the floor of tunnel’s plastic zone. We carried out the practical study on the ground of large span coal that the Ningtiaota Coal. The bolting designs were determined and analysed the stability of bolt supporting by using FLAC2D.By means of field practice, we make multiple monitoring on the support effect in synchronism and analysis the monitoring data by data processing software. We evaluate the support effect and achieve the goal of dynamic design which combined preliminary design and engineering monitor in the light of feedback information optimal design.The paper proposed theory of calculation is fit for supporting designing. It has certain efficiency and usability, and solve some technical difficult problems in the Ningtiaota Coal Mine well, and supply the design reference of the similar tunnel return air course support.更多还原