摘要
以潞安集团古城煤矿在建的大段面冻结主斜井为研究对象,采用土压力盒实测表土段井壁在施工过程中的冻结压力的演变规律,获得了冻结施工阶段大量的实测数据。详细分析了顶板、底板和侧帮在冻结施工过程中土压力演变规律:1)冻结压力的变化受到冻结温度、水化热及解冻时间等因素的影响,表现出明显的随着施工过程的波动性;2)斜井井筒受力总体上随埋深的增加呈线性增长趋势,但是也表现出空间上的差异分布;3)斜井井筒施工阶段所承受的土压力的实测值和计算值对比说明,目前的设计理论存在不足,需要完善和提高。研究成果为指导相似地层条件和冻结条件下斜井冻结壁和井壁的设计和施工提供了重要参考数据和经验。
Taking freezing main inclined shaft on big cross section under construction in Gucheng Coalmine, Lu＇an Group as the research object, the evolution of the frozen pressure and a large number of in-suit measured data have been obtained through the earth pressure cell during the construction process. And the freezing pressure evolution laws of the roof, floor and two sides during the construction process have been analyzed. Firstly, the freezing pressure changes showed obvious volatility in the course of construction,affected by freezing temperature, hydration heat and thawing time and so on. Secondly,the inclined shaft stress shows a general linear growth trend with the increase of buried depth, despite some differences of spatial distribution. Thirdly, after analyzing the measured and calculated value of earth pressure during the inclined shaft construction, the current design theory is observed to have shortcomings and needs improving. The findings have important reference and guiding value with data and and experience obtained for the inclined frozen wall and inclined shaft design and construction for the similar alluvium condition and freezing condition.
出处
《采矿与安全工程学报》
EI
CSCD
北大核心
2015年第6期984-988,共5页
Journal of Mining & Safety Engineering
基金
国家重点基础研究发展计划(973)项目(2012CB026103)
国家高技术研究发展计划(863)项目(2012AA06A401)
国家自然科学基金项目(51104146
41271096)
中央高校基本科研业务费专项资金项目(2010QNA46)
关键词
冻结压力
冻结壁
现场实测
表土段
斜井井壁
freezing pressure
frozen wall
in-suit measurement
alluvium
inclined shaft
