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Ground fissure development regularity and formation mechanism of shallow buried coal seam mining with karst landform in Jiaozi coal mine: a case study

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Journal of Mountain Science 2023年第10期20卷 3101-3120页

作者： ZHU Heng-zhong School of Energy and Mining Engineering Shandong University of Science and TechnologyQingdao 26659oChina State Key Laboratory of Strata Intelligent Control and Green Mining Co-Founded by Shandong Province and the Ministry of Science and Technology Shandong University of Science and TechnologyQingdao 266590China State Key Laboratory of Water Resource Protection and Utilization in Coal Mining Beijing 102209China

A comprehensive study was undertaken at Jiaozi coal mine to investigate the development regularity of ground fissures in shallow buried coal seam mining with karst landform,shedding light on the development type,geographical distribution,dynamic development process,and failure mechanism of these ground fissures by employing field monitoring,numerical simulation,and theoretical *** findings demonstrate that ground fissure development has an obvious feature of subregion,and its geographical distribution is significantly affected by *** type,open type,and stepped type are three different categories of ground *** fissures emerge dynamically as the panel advances,and they typically develop with a distance of less than periodic weighting step distance in advance of panel advancing *** fissures present the dynamic development feature,temporary fissure has the ability of *** dynamic development process of ground fissure with closed-distance coal seam repeated mining is expounded,and the development scale is a dynamic development stage of“closure→expansion→stabilized”on the basis of the original development *** the perspective of topsoil deformation,the computation model considering two points movement vectors towards two directions of the gob and the ground surface is established,the development criterion considering the critical deformation value of topsoil is *** mechanical model of hinged structure of inclined body is proposed to clarify the ground fissure development,and the interaction between slope activity and ground fissure development is *** research results fulfill the gap of ground fissures about development regularity and formation mechanism,and can contribute to ground fissure prevention and treatment with karst landform.

关键词： karst landform Shallow buried coal seam Development regularity Formation mechanism Ground fissure Repeated mining

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A terrain openness index for the extraction of karst Fenglin and Fengcong landform units from DEMs

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Journal of Mountain Science 2018年第4期15卷 752-764页

作者： MENG Xin XIONG Li-yang YANG Xian-wu YANG Bi-sheng TANG Guo-an Key laboratory of Virtual Geographic Environment Ministry of Education Nanjing Normal University Nanjing 210023 China State Key Laboratory Cultivation Base of Geographical Environment Evolution (Jiangsu Province) Nanjing 210023 China Jiangsu Center for Collaborative Innovation in Geographical Information Resource Development and Application Nanjing 210023 China State Key Laboratory of Information Engineering in Surveying Mapping and Remote Sensing Wuhan University Wuhan 430079 China

The Fenglin and Fengcong landform units are considered to be an important representation for defining the degree of development of karst landforms. However, these terrain features have been proven difficult to delineate and extract automatically because of their complex morphology. In this paper, a new method for identifying the Fenglin and Fengcong landform units is proposed. This method consists of two steps:(1) terrain openness calculation and(2) toe line extraction. The proposed method is applied and validated in the karst case area of Guilin by using ASTER GDEM with one arc-second resolution. The openness of both the positive and negative terrain and a threshold were used to extract toe lines for segmenting depressions and pinnacles in Fenglin and Fengcong landforms. A comparison between the extracted Fenglin and Fengcong landform units and their real units from high resolution images wascarried out to evaluate the capability of the proposed method. Results show the proposed method can effectively extract the Fenglin and Fengcong landform units, and has an overall accuracy of 93.28%. The proposed method is simple and easy to implement and is expected to play an important role in the automatic extraction of similar landform units in the karst area.

关键词： DEM karst landform Fenglin and Fengcong landform Terrain openness landform units

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Study on Jinan urban construction planning based on the protection of karst landscape

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Journal of Groundwater Science and Engineering 2018年第4期6卷 280-292页

作者： SUN Bin ZHAO Zhen-hua No.801 Hydrogeology and Engineering Geology Brigade of Shandong Exploration Bureau of Geology and Mineral Resources(Shandong Provincial Geo-mineral Engineering Exploration Institute) Jinan 250014China Key Laboratory of Groundwater Resources and Environment(Shandong Provincial Bureau of Geology&Mineral Resources) Jinan 250014China

Study on urban construction planning based on karst landscape protection contributes to sustainable development of urban construction in karst area. Jinan is a city famous for karst spring water. karst landscape plays a decisive role in urban construction. Through hydrogeological analysis, the distribution characteristics of karst mountain, cave, gully and flat dam in Jinan are analyzed. It is revealed that various karst landforms are involved in the spring circulation process to varying degrees. Some karst landforms have been destroyed in the process of urban construction and the karst landscape has been overexploited resulting in the direct or indirect weakening of spring water recharge and infiltration capacity and the decrease of spring water flow. Through the study of the principle of organic combination of karst landscape and urban construction planning, on the basis of protecting the ecological environment of the south, paying attention to the overall protection of the karst geomorphology system and the principle of accessibility of the karst landscape, the development countermeasures guided by urban planning are put forward based on karst landforms protection. On the basis of fully considering the special karst landform conditions in Jinan, the countermeasures are that the ecological control red line of urban construction planning should be set up based on karst mountains and valleys in southern of Jinan City. It is suggested that the bare carbonate rock continuous mountain foot line in the direct recharge area should be taken as the south control red line of urban development and included in the overall planning. The urban landscape is mainly displayed in the main axis based on karst mountains and springs, constructing East-West Axis-characteristic Landscape Belt along the Wufeng Mountain-Langmao Mountain-Hero Mountain-Qianfo Mountain-Long cave-Panlong cave-Jinping Mountain line and North-South Axis Landscape Belt along the Baotu SpringQianfo Mountain line,

关键词： Urban construction Urban planning karst landform Spring protection karst landscape

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A new species in the genus Hebarditettix(Orthoptera:Tetrigoidea: Scelimenidae) from the Lengshuihe Nature Preserve, Guizhou

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Entomotaxonomia 2016年第1期38卷 5-9页

作者：查岭生于凤明文庭池 Kevin D.HYDE 淮北师范大学生命科学学院安徽淮北235000 贵州大学西南药用生物资源教育部工程研究中心贵州贵阳550025 Institute of Excellence in Fungal Research School of Science Mae Fah Luang University

In identifying the insect specimens collected from the Lengshuihe Nature Preserve, Guizhou, a new species of the genus Hebarditettix, H. vallis Zha Wen sp. nov. was found. We describe it and provide illustrations. It is similar to H. armatus（Hancock） but differs from the latter by： 1） antennae inserted distinctly below lower margins of eyes, the longest segment only 6 times as long as wide; 2） abbreviated carinae between shoulders inconspicuous; 3） lower margin of fore femur with two small teeth, mid femur as wide as visible part of tegmen; 4） hind process of pronotum short, only reaching two-fifths of hind tibia. An updated key to all species of the genus Hebarditettix is given.

关键词： Scelimeninae taxonomy ecology karst landform isolate key

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