基于时间函数的高寒矿区地表动态下沉规律研究
Dynamic Subsidence Law of Surface in Alpine Mining Area Based on Time Function
魏占玺 1董建辉 2谢飞鸿 3马文礼 4袁材栋 4曹生鸿 4冯霖5
作者信息
- 1. 青海省环境地质勘查局,西宁 810007
- 2. 长沙理工大学道路灾变防治及交通安全教育部工程研究中心,长沙 410114;成都大学建筑与土木工程学院,成都 610106
- 3. 成都大学建筑与土木工程学院,成都 610106
- 4. 青海省环境地质勘查局,西宁 810007;青海九零六工程勘察设计院,西宁 810007;青海省地质环境保护与灾害防治工程技术研究中心,西宁 810007
- 5. 成都理工大学地质灾害防治与地质环境保护国家重点实验室,成都 610059
- 折叠
摘要
高寒地区因为其冻土的特殊性质导致其经历开采后随着季节变化易导致上覆岩层破坏,因此,为准确预测高寒地区矿区上覆岩层的动态沉降的发展趋势,选取高寒矿区地表富水区作为研究对象,基于Weibull时间函数与分段函数的思路,结合矿区地表干涉合成孔径雷达(interferometric synthetic aperture radar,InSAR)监测数据建立高寒矿区地表动态沉降模型,讨论该函数模型的适用性.结果表明:高寒矿区冻胀地表沉降的3个阶段沉降量与时间的关系曲线与Weibull时间函数模型对应曲线相符.对Weibull时间函数的双参数取值进行探讨并优化,最终确定当初始、加速阶段的沉降运动参数λ取值2.5,沉降时间参数η取值0.068,稳定阶段λ取值2.3,η取值0.048时误差处于限差范围内,能较为准确地模拟预测地表的动态沉降过程.研究成果可为高寒矿区的防灾减灾及治理工程提供参考.
Abstract
In high-cold regions,the susceptibility of frozen soil to damage in the overlying rock layer resulting from mining,a phe-nomenon influenced by seasonal variations was investigated.Focusing on surface water-enriched areas in high-cold mining zones as the subject of research,a dynamic subsidence model was formulated leveraging Weibull time function and segmented function approach in tandem with interferometric synthetic aperture radar(InSAR)monitoring data.The applicability of this function model was analyzed.The results show that the curve representing the three temporal stages of subsidence in high-cold mining areas corresponds to Weibull time function model's curve.Further optimization and discussion of Weibull time function's two parameters were undertaken.It is deter-mined that maintaining settlement motion parameter λ values at 2.5 and settlement time parameter η values at 0.068 during initial and acceleration stages,along with λ at 2.3 and η at 0.048 during the stable phase,achieves an error margin within the acceptable range,thus enabling accurate simulation and prediction of the dynamic subsidence process.The research results can provide a reference for disaster prevention,mitigation,and management initiatives in high-cold mining areas.
关键词
煤矿开采/高寒矿区沉降/干涉合成孔径雷达(InSAR)监测/Weibull时间函数/预测模型Key words
coal mining/subsidence in high-cold mining areas/interferometric synthetic aperture radar(InSAR)monitoring/Weibull time function/prediction model引用本文复制引用
基金项目
国家自然科学基金(41877273)
青海省"昆仑英才"领军人才计划()
出版年
2024
NETL
NSTL
万方数据