复杂地质条件下小煤窑采空区场地稳定性评价  

Stability Evaluation of Small Coal Mine Goaf Site under Complex Geological Conditions

作　　者：刘明江 陈金宏 LIU Mingjiang;CHEN Jinhong(Guizhou Coal Design Geological Engineering Co.Ltd.,Guiyang 550025;Guizhou Coal Mine Design and Research Institute Co.Ltd.,Guiyang 550025)

机构地区：[1]贵州煤设地质工程有限责任公司,贵阳550025 [2]贵州省煤矿设计研究院有限公司,贵阳550025

出　　处：《土工基础》2023年第3期426-430,共5页Soil Engineering and Foundation

基　　金：贵州省煤矿安全高效开采技术支撑与服务人才基地基金项目(GMY-RD2022.KJ-010)。

摘　　要：为分析小煤窑采空区场地稳定性,以贵州某电厂新建灰场为例,根据煤矿开采方式、终采时间对场地稳定性进行初步分析,计算了巷道顶板自然平衡拱高度及不同堆载高度作用下荷载影响深度,并结合数值模拟分析堆载作用下地基变形情况。结果表明,拟建场地现状处于稳定状态,在后续堆载作用下巷道分布区域局部发生坍塌的可能性较大,须根据巷道埋深、堆载高度采取相应的抗变形处理措施后拟建场地方适宜灰场建设,研究对类似采空区场地稳定性评价工作具有借鉴意义。To analyze the site stability of the small coal mine goaf area,this paper presents a case history evaluation of a newly constructed ash storage yard for a power plant in Guizhou.The site stability is analyzed according to the coal mining mode and final mining time,the natural balance arch height of the roadway roof and the load influence depth under the different surcharge height are estimated.The ground deformation under the surcharge is analyzed combined with the numerical analysis.The results show that the current condition24.0374.9 of the proposed site is in a stable state,under the action of subsequent surcharge,the local collapse of the roadway distribution area is more likely.After taking corresponding deformation improvement measures according to the roadway buried depth and surcharge height,the proposed site is suitable for the construction of the ash storage yard,which can be used for a reference in the stability evaluation of similar goaf sites.

关 键 词：小煤窑 采空区 堆载作用 稳定性 

分 类 号：TU475[建筑科学—结构工程]