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坡脚开挖条件下的斜坡稳定性探究

河南科技 2024年第1期51卷 90-94页

作者：杜伟赵志根安徽理工大学地球与环境学院安徽淮南232001

【目的】探究坡脚开挖对斜坡稳定性的影响,在数值模拟的基础上对斜坡隐患点进行稳定性评价。【方法】统计分析安徽省滁州市南谯区地灾隐患点孕灾特征,将其概括划分为6类不同坡度的斜坡模型,对每类模型进行梯度开挖,建立多种开挖工况,结... 详细信息

【目的】探究坡脚开挖对斜坡稳定性的影响,在数值模拟的基础上对斜坡隐患点进行稳定性评价。【方法】统计分析安徽省滁州市南谯区地灾隐患点孕灾特征,将其概括划分为6类不同坡度的斜坡模型,对每类模型进行梯度开挖,建立多种开挖工况,结合有限差分法和有限元强度折减法模拟计算出每种工况下的斜坡塑性区状态、坡体位移、安全系数。【结果】在30°坡度下,开挖10 m后,其安全系数降幅最大,为22.28%;在开挖进尺为4 m的工况下,坡度从15°增加到40°,其安全系数降幅最大,为60.18%;坡度对安全系数的影响大于开挖进尺。开挖到10 m时,临空面内部既正发生剪切破坏又正发生张拉破坏,其失稳概率高于坡顶。随着开挖进尺的增加,最大沉降和水平位移都逐渐发生在临空面上部。【结论】研究成果揭示了开挖过程中斜坡稳定性变化的规律,可为类似地质灾害的防治提供借鉴。

关键词： FLAC3D 稳定性分析安全系数地质灾害切坡建房

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安徽琅琊山风景区某崩塌的特征分析及治理措施

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河南科技 2024年第2期51卷 112-115页

作者：赵志根王康东杜伟安徽理工大学地球与环境学院安徽淮南232001 安徽省勘查技术院安徽合肥230031

【目的】分析安徽琅琊山风景区某崩塌隐患点的特征并提出治理措施。【方法】采用现场调研、地形测绘、三维激光扫描仪、稳定性评价等手段,获得该崩塌点的特征和稳定性。【结果】该崩塌点具备倾倒式崩塌的特征,4个主要危岩体都是处于不... 详细信息

【目的】分析安徽琅琊山风景区某崩塌隐患点的特征并提出治理措施。【方法】采用现场调研、地形测绘、三维激光扫描仪、稳定性评价等手段,获得该崩塌点的特征和稳定性。【结果】该崩塌点具备倾倒式崩塌的特征,4个主要危岩体都是处于不稳定或欠稳定状态。【结论】采用设置锚杆、支撑墙、水泥浆充填等方法对危岩体进行加固,并采用人工清除松动石块、发挥截水沟的作用等方法进行治理,能够消除崩塌隐患,确保景点安全和景观价值。

关键词：琅琊山风景区崩塌特征稳定性评价治理

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基于高密度电法的狩猎场斜坡稳定性分析

现代矿业 2024年第1期40卷 119-122,128页

作者：杜伟赵志根王康东安徽理工大学地球与环境学院安徽省勘查技术院

通过对狩猎场斜坡的形态、地质构造、地层分界等信息进行获取,并进行综合稳定性分析,从而给予治理意见,保障周围居民的安全。主体采用高密度电法进行勘探,选取其中一条物探线加以少量的钻孔验证,从而获取数值模拟所需要的地质剖面图,设... 详细信息

通过对狩猎场斜坡的形态、地质构造、地层分界等信息进行获取,并进行综合稳定性分析,从而给予治理意见,保障周围居民的安全。主体采用高密度电法进行勘探,选取其中一条物探线加以少量的钻孔验证,从而获取数值模拟所需要的地质剖面图,设置合理的参数代入FLAC3D进行计算。结合物探手段与数值模拟,得出该斜坡在天然工况下处于稳定状态,但局部地区仍然有沿着软弱带滑动的风险。工程实际表明,合理的物探线布设并结合少量的工程钻探可提高勘探数据的精度,FLAC3D软件模拟切坡建房类斜坡的岩土体破坏具有一定的优势,为后续地质灾害的治理提供有力保障。

关键词：高密度电法工程钻探 FLAC3D 稳定性评价

Rare Earth Element Geochemistry of Late Palaeozoic Coals in North China

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Acta Geologica Sinica(English Edition) 2000年第1期74卷 74-83页

作者： HUANG Wenhui YANG Qi TANG Dazhen TANG Xiuyi zhao zhigen China University of Geosciences 29 Xueyuan Rd Haidian District Beijing 100083 Huainan Institute of Technology Huainan Anhui 232001

Abstract: Instrumental Neutron Activation Analysis (INAA) was done to determine the abundances of rare earth elements (REE) of 58 samples of Late Palaeozoic Carboniferous-Permian coals and related rocks in North China. Detailed study of REE geochemistry shows that the ?REE of most coals studied in this paper is in a normal range between 30×10?6 and 80×10?6 with a mean of 56×10?6. The REE in the Taiyuan Formation in the northern part of North China are much richer than those in the southern part. This is due to the shorter distance to the source area in the north. Moreover, the ?REE is in positive correlation to coal ash, especially closely related to the content of clay minerals <2 μm in size. This reveals that most REE were carried by terrigenous clastic materials, especially fine clay minerals. In the coals the light REE (LREE) are much richer than the heavy REE (HREE), and the LREE/HREE ratio in coals generally varies from 2 to 8. The LREE/HREE ratio of high-ash, low-sulphur coals is higher than that of low-ash, high-sulphur coals, and is even higher in the roof and floor rocks, reaching 12 with the highest (up to 21) in pyrite concretions, which shows that the HREE have a stronger affinity to organic matter in a reducing environment influenced by seawater. Furthermore, Eu is generally depleted in coals. The REE chondrite-normalized distribution patterns are very similar in coals of the whole of North China. From the REE geochemical characteristics it can be concluded that during the formation of Late Palaeozoic Carboniferous-Permian coals in North China, the supply of terrigeneous materials remained quite stable. The ?REE in low-ash, high-sulphur coals is relatively low and the REE are mainly carried by fine-grained minerals and organic matter and a certain percentage of REE are adsorbed by organic matter; while the ?REE in high-ash, low-sulphur coals is higher and the REE are mainly present in detritus. The ?REE of magmatism-influenced coals is the highest, whi

关键词： Late Palaeozoic coal REE geochemistry North China

Identification and mapping of soybean and maize crops based on Sentinel-2 data

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International Journal of Agricultural and Biological Engineering 2020年第6期13卷 171-182页

作者： Bao She Yuying Yang zhigen zhao Linsheng Huang Dong Liang Dongyan Zhang School of Geomatics Anhui University of Science&TechnologyHuainan 232001AnhuiChina National Engineering Research Center for Agro-Ecological Big Data Analysis&Application Anhui UniversityHefei 230601China

Soybean and maize are important raw materials for the production of food and livestock *** mapping of these two crops is of great significance to crop management,yield estimation,and crop-damage *** this study,two towns in Guoyang County,Anhui Province,China,were selected as the study area,and Sentinel-2 images were adopted to map the distributions of both crops in the 2019 growing *** data obtained on August 18(early pod-setting stage of soybean)was determined to be the most applicable to soybean and maize mapping by means of the Jeffries-Matusita(JM)***,three machine-learning algorithms,i.e.,random forest(RF),support vector machine(SVM)and back-propagation neural network(BPNN)were employed and their respective performance in crop identification was evaluated with the aid of 254 ground truth *** appeared that RF with a Kappa of 0.83 was superior to the other two ***,twenty candidate features containing the reflectance of ten spectral bands(spatial resolution at 10 m or 20 m)and ten remote-sensing indices were input into the RF algorithm to conduct an important *** features were screened out and served as the optimum subset,the mapping results of which were assessed based on the ground truth derived from the unmanned aerial vehicle(UAV)images covering six ground *** optimum feature-subset achieved high-accuracy crop mapping,with a reduction of data volume by 65%compared with the total twenty features,which also overrode the performance of ten spectral ***,feature-optimization had great potential in the identification of the two ***,the findings of this study can provide a valuable reference for mapping soybean and maize in areas with a fragmented landscape of farmland and complex planting structure.

关键词： soybean and maize crop identification Sentinel-2 data machine learning feature selection

Coal petrology and genesis of Jurassic coal in the Ordos Basin,China

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Geoscience Frontiers 2012年第1期3卷 85-95页

作者： Weihua Ao Wenhui Huang Chengmin Weng Xiuling Xiao Dameng Liu Xiuyi Tang Ping Chen zhigen zhao Huan Wan Robert B.Finkelman School of Energy Resources China University of GeosciencesBeijing 100083China Anhui University of Science and Technology HuainanAnhui 232001China The University of Texas at Dallas RichardsonTX 75083-0688USA

Multiple sets of thick coal beds characterized by simple structure and shallow burial depth were developed in the Early and Middle Jurassic strata of the Ordos Basin, northwestern China. The huge reserves of this high quality coal have a high commercial value. We studied the coal＇s petrologic characteristics and its maceral distribution to determine the maceral＇s contribution to generation of oil and gas. The results show that the Jurassic coals in the Ordos Basin have special petrological features because of the Basin＇s unique depo- sitional environment which was mainly a series of high-stand swamps in the upper fluvial system. These petro- graphic features are a result of the development of typical inland lakes where some sand bodies were formed by migrating rivers. After burial, the peat continued to undergo oxidizing conditions, this process generated extensive higher inertinite contents in the coals and the vitrinite components were altered to semi-vitrinite. The macroscopic petrographic types of these Jurassic coals are mainly semi-dull coal, dull coal, semilustrous and lustrous coal. The proportions of semi-dull coal and dull coal are higher in the basin margins, especially in the area near the northern margin. The numbers of semilustrous and lustrous coals increase southwards and towards the central basin. This situation indicates that different coal-forming swamp environments have major controlling effects on the coal components. Another observation is that in the Ordos＇ coal sequences, especially in the lower part, some sandstone beds are thick, up to 20 m with a coarse grain size. The higher fusinite content in the macerals accompanies a higher semi-vitrinite content with more complete and regular plant cell structure. The fusinite structure is clear and well preserved. After burial, the lithology of the roof and floor rocks can continue to affect the evolution of coal petrology. The sand bodies in the roof and floor exhibit good physical conditions so th

关键词： Lower-Middle JurassicCoal-formingenvironment Coal maceral Ordos Basin

Geochemistry of Permian Coal and Its Combustion Residues in Huainan Coalfield, China

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Journal of China University of Geosciences 2001年第4期12卷 283-290页

作者： Huang Wenhui Yang Qi Department of Energy Resources and Geology , China University of Geosciences , Beijing 100083 Peng Suping Department of Geology and Engineering, China University of Mining and Technology, Beijing 100083 zhao zhigen Department of R Department of Energy Resources and Geology China University of Geosciences Beijing 100083 Department of Geology and Engineering China University of Mining and Technology Beijing 100083 Department of Resources and Environment Huainan Institute of Technology Huainan 232001

INAA (instrumental neutron activation analysis) was used to determine the contents of trace elements in coal samples from 11 workable Permian coal seams in Huainan coalfield. With XRFS (X-ray fluorescence spectrometry), the geochemical composition of its combustion residues from Tianjiaan Power Plant and Luohe Power Plant was analyzed. In addition, the electron microprobe was employed to study the chemical composition of some fly ashes and bottom ashes. Compared with those of the coals around the world, most trace elements of the Huainan coal are characterized by a normal abundance. Like most coals worldwide, the elements Se, S, As, Sb, Br, U and Cl are enriched in Huainan coal according to dark's value, while the other elements tend to be diluted. The large fluctuation in the contents of trace elements in this kind of coal demonstrates great differences in coal seams. On the other hand, the contents of these elements are very similar in different bottom and fly ash samples. The elements with low organic affinity tend to concentrate in fly and bottom ash than in coal, especially those elements associated with Fe. However, the elements with strong organic affinity tend to be volatile during the combustion. Moreover, the abundance of the elements in fly ash and bottom ash changes with different densities and with different particle sizes. The bottom and fly ashes consist of glass, lime, mullite, coal residues and ferrite minerals. Some residual chars contain higher contents of volatile elements, such as S, P, Cl and As, indicating that the ash containing more residual chars has a strong adsorption of some hazardous elements, suggesting a possible utilization of power plant ash in the field of water cleaning.

关键词： coal trace element combustion residues geochemistry INAA China.

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对井工煤矿采用无氧方式进行开采的畅想

当代化工研究 2023年第20期 185-187页

作者：赵志根安徽理工大学地球与环境学院安徽232001

传统的煤炭开采是有氧开采,但随着煤矿智能化无人化技术的进步、无氧作业和个体降温技术的积淀,现在我们可以畅想在井工煤矿采用无氧方式进行开采。与有氧开采相比,无氧开采或具有促进煤矿生产安全和资源综合利用的优点。本文建议对井... 详细信息

传统的煤炭开采是有氧开采,但随着煤矿智能化无人化技术的进步、无氧作业和个体降温技术的积淀,现在我们可以畅想在井工煤矿采用无氧方式进行开采。与有氧开采相比,无氧开采或具有促进煤矿生产安全和资源综合利用的优点。本文建议对井工煤矿的无氧开采予以关注,并开展对技术上可行、经济上合理、法律上许可、社会上接受等方面的探索。

关键词：井工煤矿无氧开采畅想

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《地球科学概论》课程思政的探索与实践

创新创业理论研究与实践 2021年第13期4卷 13-15页

作者：赵志根安徽理工大学空间信息与测绘工程学院安徽淮南232001

《地球科学概论》是本科人才培养方案中的一门学科基础教育模块中的课程,也是工程教育专业认证中的自然科学课程。课程思政是全员、全程、全方位育人的体现。该文从五个方面对《地球科学概论》的课程思政进行了探索;同时在实践中,教师... 详细信息

《地球科学概论》是本科人才培养方案中的一门学科基础教育模块中的课程,也是工程教育专业认证中的自然科学课程。课程思政是全员、全程、全方位育人的体现。该文从五个方面对《地球科学概论》的课程思政进行了探索;同时在实践中,教师不仅要学高为师,而且要身正为范,在教学过程中要通过恰当的手段来达到课程思政的目的。

关键词：《地球科学概论》课程思政探索实践