摘要
地下煤炭资源的开采造成了采空区,采空区的稳定性对公路建设的工程设计、施工方法、公路工程质量等工作均产生直接影响,其中对隧道工程围岩稳定性和围岩级别的划分有严重影响,公路采空区的勘察与治理作为公路建设的基础环节就显得尤为重要。本文选取山西省国道307线柳林县城区段公路改线工程中张家湾2号隧道采空区勘察为典型案例,分析了开采时间、开采方式、埋藏深度、上覆岩体特征等因素对采空区地基稳定性的影响,通过定量计算评价采空区的地基稳定性,划分采空区冒落带、裂隙带的范围,为采空区治理设计提供可靠地质依据。
Underground coal resources mining caused the gob, gob stability of highway construction engineering design, construction method, highway engineering quality work have a direct impact, which division of tunnel surrounding rock stability and surrounding rock mass classification has seriously affected, investigation and treatment of highway gob as a basic part of highway construction is particularly important. This paper selects Shanxi Province National Highway 307 lines, Liulin County city section of highway modified Zhangjiawan in construction of line No. 2 tunnel goal investigation as a typical case, analysis of the impact of production time, production way, buried depth, overlying rock mass characteristics and other factors of goaf foundation stability, through quantitative calculation and evaluation of goaf foundation stability, division of mined out area risks fall zone and fissure zone, provide reliable geological basis for the design of goal governance.
作者
孔德民
陈亚群
王少林
KONG De-rain CHEN Ya-qun WANG Shao-lin(The Second Institute of Geology and Minerals Exploration, Gansu Provincial Bureau of Geology and Minerals Exploration and Development, Lanzhou 730020, Chin)
出处
《甘肃地质》
2016年第3期86-91,共6页
Gansu Geology
