采动地表与输电线塔大板基础协同变形规律研究  

Research on the collaborative deformation law of mining surface and transmission line tower slab foundation

作　　者：赵兵朝[1,2] 赵阳[1] 冯杰 王京滨 冯欣怡 ZHAO Bingchao;ZHAO Yang;FENG Jie;WANG Jingbin;FENG Xinyi(College of Energy Engineering,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China;Key Laboratory of Western Mine Exploitation and Hazard Prevention,Ministry of Education,Xi'an University of Science and Technology,Xi'an,Shaanxi 710054,China)

机构地区：[1]西安科技大学能源学院,陕西西安710054 [2]西安科技大学西部矿井开采及灾害防治教育部重点实验室,陕西西安710054

出　　处：《采矿与安全工程学报》2024年第3期472-480,共9页Journal of Mining & Safety Engineering

基　　金：国家自然科学基金项目(51874230,52074208)。

摘　　要：为保障矿区输电线塔在采动影响下安全运行,通过理论分析和数值模拟探究采动地表与输电线塔大板基础协同变形规律。以某工作面上覆输电线塔大板基础为研究对象,基于基础的破坏形式,建立了大板基础力学模型,结合概率积分法推导得出地表与拉伸区、压缩区及中性区基础的协同变形关系式。理论分析表明:采动基础变形的关键参数有基础弹性模量(E_(j))、土体泊松比(μ)、基础根开(b_(t))、土体弹性模量(E)、电塔自重(P)和基础截面惯性矩(I_(y));基础水平变形ε_(j)与E_(j)和μ呈负相关,与地表水平变形ε、b_(t)和E呈正相关;基础倾斜变形i_(j)与地表倾斜变形i、P和b_(t)呈正相关,与E_(j)和I_(y)呈负相关。数值模拟表明:拉伸区基础水平变形>压缩区基础水平变形>中性区基础水平变形。To ensure the safe operation of the transmission line tower in the mining area under mining influence,the cooperative deformation law of the mining surface and the large slab foundation of the transmission line tower were investigated through theoretical analysis and numerical simulation.Taking the large slab foundation of a transmission line tower overlying a working surface as the research object,based on the failure patterns of the foundation,the mechanical model of the slab foundation was established.The collaborative deformation relationship between the ground surface and the foundation at the tensile(compression,neutral)zone was derived based on the probability integral method.Theoretical analysis indicated that the key parameters of foundation deformation due to mining could have foundation elastic modulus(E_(j)),soil Poissons ratio(μ),foundation root opening(bt),soil elastic modulus(E),tower self⁃weight(P),and foundation section inertia(I_(y)).Foundation horizontal deformation ε_(j) expressed a negative correlation with Ej andμ.Still,it expressed a positive correlation with surface horizontal deformationε,b_(t) and E.Foundation tilt deformation i_(j) expressed positive correlation with surface tilt deformation i,P and b_(t).Still,it behaved negative correlation with E_(j) and I_(y).Numerical simulation demonstrated a decreasing sequence regarding horizontal foundation deformation at different zones,namely deformation value at the tensile zone was the highest,followed by the value at the compression zone and that at the neutral zone.

关 键 词：采动地表变形 输电线塔 大板基础 概率积分 协同变形 

分 类 号：TD235[矿业工程—矿井建设]