Showing 321 - 338 results of 338 for search '"borehole"', query time: 0.05s Refine Results
  1. 321

    Laterization Process Recognition along the Northern Border of the Congo Craton by Geoelectrical and Geotechnical Data by H. L. Ekoro Nkoungou, S. A. Zogo Tsala, V. Oyoa, P. Eba'a Owoutou

    Published 2023-01-01
    “…With the properties of laterites being related to the nature of the rock from which they are derived, twenty vertical electrical surveys and twenty boreholes for geotechnical tests, distributed in two units (plutonic and green belt zones) of the Ntem complex located at the northern limit of the Congo Craton, were implemented to study the formation process of the laterites of this geological structure. …”
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  2. 322

    Risk Assessments of Water Inrush from Coal Seam Floor during Deep Mining Using a Data Fusion Approach Based on Grey System Theory by Yaru Guo, Shuning Dong, Yonghong Hao, Zaibin Liu, Tian-Chyi Jim Yeh, Wenke Wang, Yaoquan Gao, Pei Li, Ming Zhang

    Published 2020-01-01
    “…Taking the grouting engineering performed at Xingdong coal mine at 980 m below sea level as an example, we collected the data of grouting quantity, the loss of drilling fluid, gamma value, water temperature, average water absorption, distance between grouting loss points, water pressure on coal seam floor, and aquifuge thickness at 90 boreholes in the mine to conduct grey relational analysis, first. …”
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  3. 323

    Study on the Fractal Characteristics of Coal Body Fissure Development and the Law of Coalbed Methane Migration of around the Stope by He Yang, Zhen Liu, Danliang Zhu, Wenzhi Yang, Dawei Zhao, Wendi Wang

    Published 2020-01-01
    “…According to the orientation of the area mentioned above, the location of the CBM pumping field in relation to the coal seam roof and the arrangement of CBM extraction boreholes can be optimized, which make CBM extraction efficient. …”
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  4. 324

    Mapping 3D Overthrust Structures by a Hybrid Modeling Method by Weisheng Hou, Yanhua Li, Shuwan Ye, Songhua Yang, Fan Xiao

    Published 2025-01-01
    “…The comparison of virtual boreholes from the results and the real model shows that the accuracy of the geological object reaches 75%. …”
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  5. 325

    Network Design Mode of In-Seam Gas Extraction Parameters Using Mathematical Modelling—Take Tangan Colliery as an Example by Tong-qiang Xia, Ke Gao, Hong-yun Ren, Jiao-fei He, Zi-long Li

    Published 2020-01-01
    “…According to the extraction time, the working face was divided into 6 extraction units. The number of boreholes were 763, the drilling capacity of coal was 0.03 m/t, and the extraction rate of each unit was more than 25%. …”
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  6. 326

    Heat Recovery Potential and Hydrochemistry of Mine Water Discharges From Scotland’s Coalfields by David B. Walls, David Banks, Tatyana Peshkur, Adrian J. Boyce, Neil M. Burnside

    Published 2022-12-01
    “…Chemical characterisation of mine waters across the research area has created a valuable hydrochemical database for project stakeholders investigating mine water geothermal systems using boreholes or mine water discharges for heating or cooling purposes. …”
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  7. 327

    Multiscale modeling of reservoir systems using geostatistical methods by Chihi, Hayet, Hammami, Mohamed Amin, Mezni, Imen, Belayouni, Habib, Ben Mammou, Abdallah

    Published 2023-05-01
    “…In this paper, we propose a multiscale approach based on combined geological–geophysical investigations, geostatistics, and 3D geological modeling to build a structural model of faulted-reservoir systems, at regional and local scales within the Jeffara basin, southeast Tunisia.The regional modeling procedure is calibrated by outcrops, a Digital Elevation Model (DEM), boreholes, and well data logs. The geological processing, itself, is used as a tool to extend the database from a variety of documents such as geological maps, geological cross-sections, outcrop descriptions, and especially the wealthy geological knowledge. …”
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  8. 328

    Study on Microseismic Monitoring, Early Warning, and Comprehensive Prevention of a Rock Burst under Complex Conditions by Ke Ding, Lianguo Wang, Mei Yu, Wenmiao Wang, Bo Ren

    Published 2020-01-01
    “…In addition, a multilevel antiburst scheme was proposed for the complex conditions: (1) to adopt large-diameter boreholes pressure relief technology and key layer high-level pressure relief technology for adjusting the stress distribution in the surrounding rock of crossheading in front of the working face and dissipating elastic strain energy; (2) to determine the advance speed to be 1.5 m/d for reducing the mining disturbance; (3) to adopt full-section reinforced support of the roadway for enhancing the antiburst capacity of surrounding rock. …”
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  9. 329

    Similar Material Simulation Study on Protection Effect of Steeply Inclined Upper Protective Layer Mining with Varying Interlayer Distances by Zhigang Yuan, Yaohua Shao, Zhuohui Zhu

    Published 2019-01-01
    “…The research results provide a useful guide for layouts of roadway and gas drainage boreholes to prevent gas disaster in Nantong coal mine district.…”
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  10. 330

    Groundwater Potential Assessment Using Integrated Geospatial and Analytic Hierarchy Process Techniques (AHP) in Chemoga Watershed, Upper Blue Nile Basin, Ethiopia by Samuel Berihun Kassa, Fasikaw Atanaw Zimale, Arega Mulu, Tadege Aragaw Worku, Mindesilew Lakew Wossene, Taye Minichil Meshesha, Yoseph Buta Hailu, Tadele F. Aman, Mekash S. Kifelew, Habtamu Asrat Mekonnen

    Published 2025-01-01
    “…The model was validated by cross-referencing the generated GWPZ with existing data from dug wells and boreholes. The results reveal five groundwater potential zones: very high (0.73%), high (24.39%), moderate (43.38%), poor (31.25%), and very poor (0.25%). …”
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  11. 331

    Optimizing Site Selection for Construction: Integrating GIS Modeling, Geophysical, Geotechnical, and Geomorphological Data Using the Analytic Hierarchy Process by Doaa Wahba, Awad A. Omran, Ashraf Adly, Ahmed Gad, Hasan Arman, Heba El-Bagoury

    Published 2024-12-01
    “…A comprehensive analysis of in situ and laboratory-based geological and geotechnical data from 24 boreholes examined soil plasticity, water content, unconfined compressive strength, and consolidation parameters. …”
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  12. 332

    Seismic microzonation studies in the Southern part of Progo River, special Region of Yogyakarta, Indonesia by Ghina Bani Azifah, Teuku Faisal Fathani, Hendy Setiawan

    Published 2025-02-01
    “…Methods The study was conducted in the southern part of the Progo River, the Special Region of Yogyakarta, using 31 boreholes and 18 microtremor measurement points. The analysis was carried out using four methods: Kanai (In: Proceeding of Japan Earthquake Engineering Symposium 1–4, 1966) equation using microtremor data, deterministic equations with Ground Motion Prediction Equations Next Generations Attenuation West 2 (GMPE NGA West 2), Kanno et al (Bull Seismol Soc Am 96:879–897, 2006) attenuation equation, and probabilistic method referring to the Indonesian Seismic code. …”
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  13. 333

    Hard rock aquifer architecture and water circulation levels in the Strengbach critical zone observatory (France) by Chabaux, François, Négrel, Philippe, Gal, Frederick, Viville, Daniel, Ranchoux, Coralie, Van der Woerd, Jérome, Delay, Frederick, Ackerer, Julien, Aquilina, Luc, Diraison, Marc, Masson, Frédéric, Mériaux, Anne-Sophie, Labasque, Thierry, Lucas, Yann, Pezard, Philippe Adrien, Reuschlé, Thierry, Schmitt, Anne-Désirée, Stille, Peter, Wyns, Robert, Lerouge, Catherine, Dezayes, Chrystel

    Published 2023-11-01
    “…For this purpose, six boreholes (50–120 m depth), from which three are cored, and three piezometers (10–15 m depth) were drilled to define the vertical extension and lateral variability of the main CZ horizons.The Strengbach watershed is composed of a topsoil horizon of limited vertical extension (0.8–1.2 m), a mobile saprolite level, and an in-place fractured bedrock. …”
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  14. 334

    Constraining the Geochemical Fingerprints of Gases from the UK Carboniferous Coal Measures at the Glasgow Geoenergy Observatories Field Site, Scotland by Rebecca M. Chambers, Gareth Johnson, Adrian J. Boyce, Stuart M. V. Gilfillan

    Published 2023-12-01
    “…CO2 gas is more abundant than CH4 throughout the succession in all three boreholes, exhibiting high δ13CCO2 values relative to the CH4 present. …”
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  15. 335

    A new approach for evaluating regional permafrost changes: A case study in the Hoh Xil on the interior Qinghai‒Tibet Plateau by Yu-Xin Zhang, Lin Zhao, Chang-Wei Xie, Guo-Jie Hu, Shu-Hua Yang, De-Fu Zou, Yong-Ping Qiao, Xiang-Fei Li, Jia-Jie Peng

    Published 2024-12-01
    “…The simulated ground temperature profiles in four boreholes from various permafrost zones revealed an error of less than 0.7 °C below 5 m in depth. …”
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  16. 336

    Linkage Analysis between Solid-Fluid Coupling and the Strength Reduction Method for Karst Cave Water Inrush in Mines by Yanlin Zhao, Jian Liao, Qiang Liu, Yang Li, Jianchao Cheng

    Published 2020-01-01
    “…The reason leading to Karst water inrush of Qiyi Mine is that without advanced boreholes, the water-proof rock pillar is set so small that it could not possess safety margin, so the confined Karst cave water breaks the water-proof rock pillar and bursts out. …”
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  17. 337

    Water, Sanitation and Hygiene in a Conflict Area: A Cross-Sectional Study in South Kordofan, Sudan by Rofida Asmally, Abdelmalik A. Imam, Abdullatif Eissa, Abubakr Saeed, Ahmed Mohamed, Eahaa Abdalla, Mariam Alazraa M. Esmaeel, Mariam Elbashir, Mohamed H. Elbadawi, Mohammed Omer, Raghad Eltayeb, Ranya Mohammed, Tibyan Abdalhamed, Tina Merghani

    Published 2025-01-01
    “…Results Out of 784 participants, 60.2% were female. Tube wells/boreholes were the primary water source (68.1%), and most participants (70.9%) lived near their water source (less than 30 min). …”
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  18. 338

    Prevalence, intensity and risk factors of soil-transmitted helminthiasis after five effective rounds of preventive chemotherapy across three implementation units in Ondo State, Nig... by Hammed O Mogaji, Francisca O Olamiju, Fajana Oyinlola, Ijeoma Achu, Oladunni N Adekunle, Lydia E Udofia, Ekaette G Edelduok, Clement A Yaro, Olanike O Oladipupo, Alice Y Kehinde, Fatai Oyediran, Moses Aderogba, Louise K Makau-Barasa, Uwem F Ekpo

    Published 2025-01-01
    “…In Ese-Odo, significant risk factors for STH infection included the use of hand-pump boreholes (AOR: 2.44, 95% CI: 1.23-4.88, p = 0.01), unprotected dug wells (AOR: 3.25, 95% CI: 0.96-11.36, p = 0.06), ventilated improved pit latrines (AOR: 3.95, 95% CI: 1.13-16.1, p = 0.04), pit latrines without a slab (AOR: 2.19, 95% CI: 1.27-3.8, p = 0.01), and failure to use soap after defecation, both when soap was available (AOR: 12.09, 95% CI: 1.86-112.97, p = 0.01) and when soap was unavailable (AOR: 8.19, 95% CI: 1.73-76.65, p = 0.04). …”
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