确定矿山开采沉陷边界有助于评估矿区生产活动对周围环境和基础设施的潜在影响,为制定有效的灾害防控措施提供技术手段。充分考虑到概率积分法等传统方法在划定矿山开采沉陷边界时的不足,采用在获取矿区大范围高精度地表沉降数据方面具...确定矿山开采沉陷边界有助于评估矿区生产活动对周围环境和基础设施的潜在影响,为制定有效的灾害防控措施提供技术手段。充分考虑到概率积分法等传统方法在划定矿山开采沉陷边界时的不足,采用在获取矿区大范围高精度地表沉降数据方面具有优势的SBAS-InSAR技术,并结合淘金算法(Gold Rush Optimizer,GRO)优化双向长短期记忆(Bidirectional Long Short Term Memory,BiLSTM)模型的预测方法,实现矿区开采沉陷边界划定。以红会煤矿为研究对象,依据SBAS-InSAR技术提取矿区沉降边缘高相干点在2018-11-29—2020-02-04时间段内共37期沉降数据,以下沉10 mm等值线划定沉陷边界,利用GRO-BiLSTM优化模型预测高相干点的地表沉降值,并将预测结果与LSTM和BiLSTM模型预测结果进行了对比分析。结果表明:GRO-BiLSTM模型在整体测试集中均方根误差为3.204mm,比LSTM和BiLSTM模型分别降低了22.16%和8.21%;平均绝对误差为2.062 mm,比LSTM和BiLSTM模型分别降低了23.96%和5.43%,表明该方法可以有效监测和预测矿区边界地区的沉陷状况。展开更多
Landslide hazard susceptibility evaluation takes on critical significance in early warning and disaster prevention and reduction.In order to solve the problems of poor effectiveness of landslide data and complex calcu...Landslide hazard susceptibility evaluation takes on critical significance in early warning and disaster prevention and reduction.In order to solve the problems of poor effectiveness of landslide data and complex calculation of weights for multiple evaluation factors in the existing landslide susceptibility evaluation models,in this study,a method of landslide hazard susceptibility evaluation is proposed by combining SBAS-InSAR(Small Baseline Subsets-Interferometric Synthetic Aperture Radar)and SSA-BP(Sparrow Search Algorithm-Back Propagation)neural network algorithm.The SBAS-InSAR technology is adopted to identify potential landslide hazards in the study area,update the cataloging data of landslide hazards,and 11 evaluation factors are chosen for constructing the SSA-BP model for training and validation.Baihetan Reservoir area is selected as a case study for validation.As indicated by the results,the application of SBAS-InSAR technology,combined with both ascending and descending orbit data,effectively addresses the incomplete identification of landslide hazards caused by geometric distortion of single orbit SAR data(e.g.,shadow,overlay,and perspective contraction)in deep canyon areas,thereby enabling the acquisition of up-to-date landslide hazard data.Moreover,in comparison to the conventional BP(Back Propagation)algorithm,the accuracy of the model constructed by the SSA-BP algorithm exhibits a significant increase,with mean squared error and mean absolute error reduced by 0.0142 and 0.0607,respectively.Additionally,during the process of susceptibility evaluation,the SSA-BP model effectively circumvents the issue of considerable manual interventions in calculating the weight of evaluation factors.The area under the curve of this model reaches 0.909,surpassing BP(0.835),random forest(0.792),and the information value method(0.699).The risk of landslide occurrence in the Baihetan Reservoir area is positively correlated with slope,surface temperature,and deformation rate,while it is negatively correlated with fault distance and normalized difference vegetation index.Geological lithology exerts minimal influence on the occurrence of landslides,with the risk being low in forest land and high in grassland.The method proposed in this study provides a useful reference for disaster prevention and mitigation departments to perform landslide hazard susceptibility evaluations in deep canyon areas under complex geological conditions.展开更多
文摘确定矿山开采沉陷边界有助于评估矿区生产活动对周围环境和基础设施的潜在影响,为制定有效的灾害防控措施提供技术手段。充分考虑到概率积分法等传统方法在划定矿山开采沉陷边界时的不足,采用在获取矿区大范围高精度地表沉降数据方面具有优势的SBAS-InSAR技术,并结合淘金算法(Gold Rush Optimizer,GRO)优化双向长短期记忆(Bidirectional Long Short Term Memory,BiLSTM)模型的预测方法,实现矿区开采沉陷边界划定。以红会煤矿为研究对象,依据SBAS-InSAR技术提取矿区沉降边缘高相干点在2018-11-29—2020-02-04时间段内共37期沉降数据,以下沉10 mm等值线划定沉陷边界,利用GRO-BiLSTM优化模型预测高相干点的地表沉降值,并将预测结果与LSTM和BiLSTM模型预测结果进行了对比分析。结果表明:GRO-BiLSTM模型在整体测试集中均方根误差为3.204mm,比LSTM和BiLSTM模型分别降低了22.16%和8.21%;平均绝对误差为2.062 mm,比LSTM和BiLSTM模型分别降低了23.96%和5.43%,表明该方法可以有效监测和预测矿区边界地区的沉陷状况。
文摘煤矿长时间开采会导致上覆岩层在重力因素下产生刚性弯曲、断裂等,进而造成一系列安全隐患。如何高效地对煤矿区进行地表形变监测,对煤矿安全、自然生态有着十分重要的意义。文章结合小基线集干涉测量(small baseline subset InSAR,SBAS-InSAR)技术与瞬变电磁测深法对煤矿区进行沉降监测。此外,采用标准差椭圆分析了沉降体空间形变规律与特征,利用长短时记忆网络(long short term memory network,LSTM)模型预测了沉降体形变趋势。分析结果表明:通过瞬变电磁法与干涉测量结合,地表形变范围基本与瞬变电磁反演的采空区吻合,标准差椭圆分析出形变中心向西南方移动376 m,沉降形态也在向似圆状过渡;LSTM模型可以预测两个月的形变,误差为2 mm,可以实现煤矿区形变趋势的短期预测。
基金funded by the National Natural Science Foundation of China(Grant No.41861134008)Muhammad Asif Khan academician workstation of Yunnan Province(Grant No.202105AF150076)+6 种基金General program of Yunnan Province Science and Technology Department(Grant No.202105AF150076)Key Project of Natural Science Foundation of Yunnan Province(Grant No.202101AS070019)Key R&D Program of Yunnan Province(Grant No.202003AC100002)General Program of basic research plan of Yunnan Province(Grant No.202001AT070059)Major scientific and technological projects of Yunnan Province:Research on Key Technologies of ecological environment monitoring and intelligent management of natural resources in Yunnan(No:202202AD080010)“Study on High-Level Hidden Landslide Identification Based on Multi-Source Data”of Key Laboratory of Early Rapid Identification,Prevention and Control of Geological Diseases in Traffic Corridor of High Intensity Earthquake Mountainous Area of Yunnan Province(KLGDTC-2021-02)Guizhou Scientific and Technology Fund(QKHJ-ZK[2023]YB 193).
文摘Landslide hazard susceptibility evaluation takes on critical significance in early warning and disaster prevention and reduction.In order to solve the problems of poor effectiveness of landslide data and complex calculation of weights for multiple evaluation factors in the existing landslide susceptibility evaluation models,in this study,a method of landslide hazard susceptibility evaluation is proposed by combining SBAS-InSAR(Small Baseline Subsets-Interferometric Synthetic Aperture Radar)and SSA-BP(Sparrow Search Algorithm-Back Propagation)neural network algorithm.The SBAS-InSAR technology is adopted to identify potential landslide hazards in the study area,update the cataloging data of landslide hazards,and 11 evaluation factors are chosen for constructing the SSA-BP model for training and validation.Baihetan Reservoir area is selected as a case study for validation.As indicated by the results,the application of SBAS-InSAR technology,combined with both ascending and descending orbit data,effectively addresses the incomplete identification of landslide hazards caused by geometric distortion of single orbit SAR data(e.g.,shadow,overlay,and perspective contraction)in deep canyon areas,thereby enabling the acquisition of up-to-date landslide hazard data.Moreover,in comparison to the conventional BP(Back Propagation)algorithm,the accuracy of the model constructed by the SSA-BP algorithm exhibits a significant increase,with mean squared error and mean absolute error reduced by 0.0142 and 0.0607,respectively.Additionally,during the process of susceptibility evaluation,the SSA-BP model effectively circumvents the issue of considerable manual interventions in calculating the weight of evaluation factors.The area under the curve of this model reaches 0.909,surpassing BP(0.835),random forest(0.792),and the information value method(0.699).The risk of landslide occurrence in the Baihetan Reservoir area is positively correlated with slope,surface temperature,and deformation rate,while it is negatively correlated with fault distance and normalized difference vegetation index.Geological lithology exerts minimal influence on the occurrence of landslides,with the risk being low in forest land and high in grassland.The method proposed in this study provides a useful reference for disaster prevention and mitigation departments to perform landslide hazard susceptibility evaluations in deep canyon areas under complex geological conditions.
