Sustainability Commons^™

Multidimensional Deformation Monitoring Using Insar Technology In Yuxian Mining Area, Du Jiantao, Yan Li, Zhao Chaoying

Coal Geology & Exploration

Yuxian County in Hebei Province is one of the largest mining areas in North China. This area has been suffering serious ground deformation due to underground mining activity, which not only threatens mining safety, but also seriously damages local ecological environment. To obtain the surface deformation map of the overall mining area and to analysis the spatiotemporal evolution features, 61 C-band descending track and ascending track Sentinel-1A/B images from July 2017 to September 2018 were processed based on Interferometric Synthetic Aperture Rader(InSAR) technique. In addition, the two-dimensional deformation time series of Xixizhuang mine were obtained by using the multi-dimensional deformation …

Ruger Approximate Formula-Based Prediction Of Fractured Reservoir, Wu Shanshan, Gao Gang, Gui Zhixian, Wang Peng, Li Chengyi

Coal Geology & Exploration

The azimuthal anisotropy of pre-stack P-wave is the most widely used method to detect fracture. This method mainly uses the long-axis and minor axis information of the ellipse fitted by the AVAZ seismic data to evaluate the fracture. When applying it in practice, it is considered that the variation of AVAZ response characteristics in the fractured reservoirs is just determined by the anisotropic parameters, and the influence of non-anisotropic parameters is not taken into account, which leads to the multi-solution of fracture evaluation. In order to improve the accuracy of this fracture evaluation technology, we started with the model analysis, …

Application Of Far And Near Trace Attributes For Avo Analysis In Deep Water Area In Qiongdongnan Basin, Liu Shiyou, Zhang Yingzhao, Li Yangsen, Yan Anju, Zhang Haiyang

Coal Geology & Exploration

For prestack seismic data with low signal-to-noise ratio(SNR), the effect of traditional AVO rendezvous analysis and intercept gradient product attribute(P×G attribute) may not be ideal. In order to extract the information of AVO attribute effectively, this paper starts from the prestack partial superposition body, according to the relative relation of the far and near track part superposition body, the far and near attribute factor similar to the P×G attribute was constructed, in which the near track stack reflects the intercept attribute, and the near-far stack difference reflects the intercept attribute, which is similar to the …

Application Of Small Scale Curvature In Small And Micro-Structure Interpretation Of Coal Field, Cheng Yan

Coal Geology & Exploration

The interpretation and delineation of small and micro-structure which acts as one of the main disaster sources in coal mine is an important guarantee for safe and efficient production of coal mines. However, it can't satisfy the geological guarantee for precise mining by only using the traditional seismic exploration methods to solve this problem. Therefore, in this paper, we reconstruct the seismic data by extracting the components above 60 Hz from the 3D seismic data, and then extract minimum negative curvature to interpret and analyze the small and micro-structures in study areas. By comparing the revealed micro-structures and explained results …

Application Of Mine-Hole Joint Microseismic Technology In Monitoring The Damage Depth Of Working Face Floor, Duan Jianhua, Yan Wenchao, Nan Hanchen, Zhang Qingqing, Fan Xin

Coal Geology & Exploration

Accurate prediction of the mining damage depth of floor is a key problem in the prevention and control of mining floor water hazard especially in the case with confined water. It is very important for developing the strategy of water control. According to the geological characteristics and working face layout of Baode coal mine, Shaanxi Province, a high-precision microseismic monitoring system consisting of well and hole arrays was deployed to detect the floor damage depth in working face 81307 in real time. The velocity model was calibrated and the location accuracy was verified by hammering method. It is proved that …

Forward Response Analysis Of Shield Advanced Detection With Moving Array Electrode, Zhao Shuanfeng, Bai Yunrui, Huang Tao, Wei Mingle

Coal Geology & Exploration

Aiming at problems of serious electromagnetic interference, difficult application in TBM(Tunnel Boring Machine) tunnel construction and so on, a method of shield advanced detection based on moving array electrodes is adopted. Using Comsol Multiphysics finite element simulation software to establish geoelectric model, forward response analysis is carried out for various geological conditions. The results show that adding the protective electrodes can obviously enlarge the voltage distribution range, which means the detection range increases. In order to improve the detection effect, it is necessary to add protective electrodes. Changes in the size, shape and position of the anomalous body will exhibit …

Frequency Dispersion Mechanism Of Complex Resistivity Of Coal, Guo Yuehui, Zhang Yugui, Li Jian, Zhou Meng

Coal Geology & Exploration

In order to study the physical mechanism of frequency dispersion of complex resistivity of coal at 0-200 kHz, the amplitude-frequency and phase-frequency of complex resistivity of coal are measured under variable frequency of constant current. Using the Fourier inverse transform to convert the frequency domain data of complex resistivity of coal into time domain data; Using the Cole-Cole model, the complex resistivity dispersion data are fitted; Drawing on the electric double layer deformation hypothesis theory, the dispersion mechanism of complex resistivity of coal is studied by comparing the frequency dispersion of sandstone. The results show that in the current frequency …

The Key Technology For Drilling Horizontal Well In Coal Seam Roof In Qianbei Mining Area, Hu Xinpeng, Zhao Yongzhe, Xu Kanshe, Wang Linjie, Li Peng, Duan Huijun

Coal Geology & Exploration

primary ways to develop the soft coal seam CBM. Aiming at the complex geological conditions and reservoir conditions in Qianbei mining area of Guizhou Province, in order to solve the problems of horizontal well leakage, well trajectory control and solid completion in the horizontal well drilling of coal seam roof, the key technology of horizontal well drilling of coal seam roof in Qianbei mining area, with the accurate control of trajectory as the core, and the technology of preventing leakage, eccentricity and solid completion are combined. Combined with on-site drilling practice, the problems of difficulties in horizontal well drilling were …

Effect Of Temperature On The Performance Of Pdc Cutters With Different Shape, Zhang Suhu, Wang Chuanliu, Dai Yongbo

Coal Geology & Exploration

In order to explore the performance of PDC cutters at different temperatures to adapt to different brazing temperatures, and to reasonably select the shape to improve efficiency. Based on the several main parameters affecting the quality of polycrystalline diamond compacts (PDC), such as wear resistance, grinding time, stationarity and impact toughness, the performance of PDC sheets from different manufacturers and different shapes was tested. The performance of PDC before or after heating and at different temperatures was obtained. At the same time, the performance of flat sheets, micro-arcs sheets and arcs sheets was compared. The results show that with the …

Envisioning Higher Education For Sustainability After The Sh*T Hits The Fan, Paul Morgan, Rebecca Drake

Sustainability Research & Practice Seminar Presentations

No abstract provided.

Arctic Ice And The Ecological Ascent Of The Dinosaurs, Paul E. Olsen

Sustainability Seminar Series

Despite the extremely high levels of atmospheric CO2 (+2000 ppm) in the Late Triassic and earliest Jurassic (~232-199 million years ago), there is evidence of seasonally freezing conditions in the Arctic of that time. This evidence consists of abundant icerafted debris in lake sediments. Based on phylogenetic bracket analysis, dinosaurs at this time were insulated, and could take advantage of the rich Arctic deciduous and evergreen vegetation, even under freezing winter conditions. Transient volcanic winters caused by the eruptions of the Central Atlantic Magmatic Province led to a mass extinction at 201.6 million years ago, at the close of the …

Ua12/2/1 College Heights Herald, Vol. 95, No. 18, Wku Student Affairs

WKU Administration Documents

WKU campus newspaper reporting campus, athletic and Bowling Green, Kentucky news. This issue contains articles:

• Lamb, Cassady. Posted Up: Local Apartment Complexes Are Suing the United States Post Office
• Williams, Matthew. WKU to be Evaluated by Higher Education Consulting Firm
• Collins, Michael. Strategic Sustainability Plan to be Developed
• Stack, Madalyn. Editorial Cartoon re: Racism
• Black History Month: Past & Present
• Warner, Casey. Kentucky Canabis Laws Are Behind the Times – Marijuana
• Dobbs, Jack. Bitter Sweet – Chocolate Festival, Hospice of Southern Kentucky
• Metcalf, Taylor. Fast Fashion
• Lowe, Julianna. Sustainable On-campus Bathroom Practices, In Public or Private
• Gaylord, Kaden. WKU Softball …

Project 1851 - A Journey In Sustainability: A Tech-Integrated And Regenerative Rental Property, Markos Duey

Sustainability Research & Practice Seminar Presentations

No abstract provided.

Reconstructing Last Interglacial Sea Level To Understand How Ice Sheets Behave In A Warmer World, Jacqueline Austermann

Sustainability Seminar Series

The last interglacial (125 ka) marks a time during which global mean temperatures were 1-2º warmer than pre-industrial values. This time period has therefore been used as a natural laboratory for studying ice sheet stability and sea level rise in a warmer world. Local sea level during the last interglacial can be reconstructed using sea level indicators such as fossil corals. In order to infer global mean sea level, or equivalent ice volume, one needs to correct local sea level estimates for post-depositional deformation. In this presentation I will explain what solid Earth deformation needs to be accounted for in …

Risk And Cost Assessment Of Nitrate Contamination In Domestic Wells, Pongpun Juntakut, Erin M.K. Haacker, Daniel D. Snow, Chittaranjan Ray

Daugherty Water for Food Global Institute: Faculty Publications

This study combines empirical predictive and economics models to estimate the cost of remediation for domestic wells exceeding suggested treatment thresholds for nitrates. A multiple logistic regression model predicted the probability of well contamination by nitrate, and a life cycle costing methodology was used to estimate costs of nitrate contamination in groundwater in two areas of Nebraska. In south-central Nebraska, 37% of wells were estimated to be at risk of exceeding a threshold of 7.5 mg/L as N, and 17% were at risk of exceeding 10 mg/L as N, the legal limit for human consumption in the United States. In …

Ecological Risk Assessment Of The Shark Bay Invertebrate Fisheries, Department Of Primary Industries And Regional Development

WA Marine Stewardship Council report series

The Department of Primary Industries and Regional Development (DPIRD, Department) in Western Australia (WA) uses an Ecosystem-Based Fisheries Management (EBFM) approach that considers all relevant ecological as well as social, economic and governance issues to deliver community outcomes (Fletcher et al. 2010; 2012). Ecological risk assessments (ERAs) are undertaken periodically to assess the impacts of fisheries on all the different components of the aquatic environments in which they operate.

Ecological Risk Assessment Of The Exmouth Gulf Prawn Managed Fishery, Department Of Primary Industries And Regional Development

WA Marine Stewardship Council report series

The Department of Primary Industries and Regional Development (DPIRD, Department) in Western Australia (WA) uses an Ecosystem-Based Fisheries Management (EBFM) approach that considers all relevant ecological as well as social, economic and governance issues to deliver community outcomes (Fletcher et al. 2010; 2012). Ecological risk assessments (ERAs) are undertaken periodically to assess the impacts of fisheries on all the different components of the aquatic environments in which they operate.

Ecological Risk Assessment Of The Abrolhos Islands And Mid-West Trawl Managed Fishery, Department Of Primary Industries And Regional Development

WA Marine Stewardship Council report series

The Department of Primary Industries and Regional Development (DPIRD, Department) in Western Australia (WA) uses an Ecosystem-Based Fisheries Management (EBFM) approach that considers all relevant ecological as well as social, economic and governance issues to deliver community outcomes (Fletcher et al. 2010; 2012). Ecological risk assessments (ERAs) are undertaken periodically to assess the impacts of fisheries on all the different components of the aquatic environments in which they operate.

Planning For The Peel Food Zone, Heather M. Percy

All other publications

The Planning for the Peel Food Zone project is part of Phase 1 of the Transform Peel initiative.Transform Peel is intended to be a ‘disruptive’ long-term program that supports economic growth, diversification and creates jobs in the Peel region. Transform Peel recognises the importance of protecting the internationally recognised waterways and wetlands of the Peel–Harvey Estuary and aims to halve the nutrient loads entering its waterways from the surrounding catchment.

The $49.3 million Phase 1 program for Transform Peel comprises three main components: Peel Food Zone; Peel Integrated Water Initiative; Peel Business Park.

This report summarises the findings from the …

Urban Heat In Tropical Kuala Lumpur: Microclimate, Outdoor Thermal Comfort And Mitigation By Land-Cover Modification, Chng Saun Fong

Student Works (2020-2029)

Urban heat island (UHI) is an urban warming phenomenon characterized by steep urban-rural temperature difference. Rapid land-use change in the urbanization process has introduced urban morphologies with impermeable surfaces and materials which causes higher heat retention in city centres. The emergence of urban hotspots is a growing concern due to the impact on the urban microclimate and human population. The comprehension of the multi-dimensional impact of UHI has become imperative to ensure good urban liveability especially in tropical cities where it is hot and humid annually. Hence, this study aims to explore the complex nexus of urban heat in terms …