Showing 241 - 260 results of 338 for search '"borehole"', query time: 0.04s Refine Results
  1. 241

    Predicting the presence of tephra layers in lacustrine deposits using spectral gamma ray data: An example from Lake Chalco, Mexico City. by Mehrdad Sardar Abadi, Christian Zeeden, Arne Ulfers, Alex Susan Meyer, Thomas Wonik, Mexidrill team

    Published 2024-01-01
    “…Spectral gamma ray borehole logging data can yield insights into the physical properties of lake sediments, serving as a valuable proxy for assessing climate and environmental changes. …”
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    Article
  2. 242

    New Leakage Model for Naturally Fractured Formations Considering the Effects of Dual-System Hydro-Mechanical Coupling by Hao Peng, Qian Li, JiaJia Gao, Hu Yin, Jun Wang

    Published 2021-01-01
    “…The new model may be utilized to simulate various problems related to the invasion of drilling fluids into the fractures, including predicting the dynamic width of natural fracture and borehole ballooning/breathing phenomena.…”
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  3. 243

    Role of hole depth on mechanical behavior and acoustic emission characteristics of pre-drilled sandstone by Jiahan Liu, Ruide Lei, Ruide Lei

    Published 2025-01-01
    “…AE analysis shows that the deeper the borehole, the lower the AE signal frequency, indicating fewer but more significant fracturing events. …”
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    Article
  4. 244

    Research on Pressure Relief Hole Parameters Based on Abutment Pressure Distribution Pattern by Jian Hao, Hua Bian, Yongkui Shi, Anfa Chen, Jiankang Liu, Peizhe Zhang, Linjun Peng, Jianquan Tang

    Published 2021-01-01
    “…Borehole pressure relief technology is an effective way to reduce the elastic energy in the surrounding rock of deep roadways, thereby reducing the risk of regional rock bursts. …”
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    Article
  5. 245

    Study on the Key Technology of Controlling the Instability of Deep High-Stress Coal and Rock Mass and Relieving the Danger by Zhijing Zhang, Jianghong Zuo, Dongji Lei

    Published 2021-01-01
    “…By comparing and analyzing the gas extraction amount, the surrounding borehole stress change and the microseismic monitoring signals before and after the application of hydraulic cavitation technology are studied. …”
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    Article
  6. 246

    Stability Analysis and Derived Control Measures for Rock Surrounding a Roadway in a Lower Coal Seam under Concentrated Stress of a Coal Pillar by Zhuoyue Sun, Yongzheng Wu, Zhiguo Lu, Youliang Feng, Xiaowei Chu, Kang Yi

    Published 2020-01-01
    “…This is an ideal position for the lower coal seam roadway. (3) The shallowness of the roadway, a small stress concentration coefficient, high level of coal cohesion, large coal internal friction angle, and appropriate lengthening of the working face of the upper coal seam are conducive to the stability of the lower coal seam roadway. (4) Through bolt (cable) support, borehole pressure relief, and pregrouting measures, the roof-to-floor and rib-to-rib convergence of the 13313 return airway is significantly reduced, and the stability of the rock surrounding the roadway is substantially improved. …”
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    Article
  7. 247

    Inverted Patterns of Schistosomiasis and Fascioliasis and Risk Factors Among Humans and Livestock in Northern Tanzania by Ephrasia A. Hugho, Yakob P. Nagagi, Lucille J. Lyaruu, Victor V. Mosha, Ndealilia Senyael, Magweiga M. Mwita, Ruth W. Mabahi, Violet M. Temba, Mapulish Hebel, Mohamed Nyati, Blandina T. Mmbaga, Theonest O. Ndyetabura, AbdulHamid S. Lukambagire

    Published 2025-01-01
    “…Human–animal contact through husbandry increased schistosomiasis risk (aOR = 4.21; 95% CI: 1.81–9.80), while the use of borehole-water was protective (aOR = 0.33; 95% CI: 0.11–0.97). …”
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    Article
  8. 248

    Protein hydrolysate as an efficient and environmental-friendly swelling inhibitor in clay formations by Yahya Dashti-Rahmatabadi, Hamid Saeidian, Javad Mokhtari, Zohreh Mirjafary

    Published 2025-01-01
    “…However, when these fluids are employed in clay formations, borehole stability becomes problematic due to the potential of clay swelling, unless appropriate inhibition strategies are implemented. …”
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    Article
  9. 249

    Study on Stability of Tunnel Surrounding Rock and Precipitation Disaster Mitigation in Flowing Sand Body by Yongyi He, Bole Sun, Mingnian Wang

    Published 2021-01-01
    “…Then, to solve the problem of borehole collapse in flowing sand bodies, pipe feeding was introduced, thus further enhancing the precipitation effect. …”
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    Article
  10. 250

    Quantitative determination of the leaching range of in-situ leaching mining area by stagnation point by Chong Zhang, Yongmei Li, Yuqing Niu, Kaixuan Tan, Tingting Xie, Yixuan Yao, Chunguang Li, Zhenzhong Liu

    Published 2025-02-01
    “…Reducing the spacing of borehole can increase the drawdown of groundwater, and slightly increase the distance between the stagnation point and the edge injection well, i.e., the outer boundary of the leaching range. …”
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    Article
  11. 251

    Experimental study on grouting reinforcement characteristics of groutable fault fracture zone in western mining area by Mingjin FAN, Juntao CHEN, Hailong GU, Daozeng TANG, Gang HAN, Shuqiang ZHANG, Guangqiang LI

    Published 2025-01-01
    “…After grouting, the water absorption rate of each borehole was not greater than the critical value of 0.01 L/(min·m·m), and the grouting amount decreased from an average of 1 317.81 t to an average of 80.2 t. …”
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    Article
  12. 252

    Subsurface geology of the Torino metropolitan area (Westernmost Po Plain, NW Italy) by Andrea Irace, Igor Marcelli, Gianfranco Fioraso, Andrea Festa, Rita Catanzariti, Brunella Raco, Matia Menichini, Giulio Masetti, Elisa Brussolo, Gianna Vivaldo, Marco Doveri

    Published 2024-12-01
    “…The map provides an updated representation of the bedrock geology below the late Early Pleistocene-Holocene Alpine-sourced fluvial blanket, relying on novel correlation of shallow water well and borehole logs. The map describes how the syn-depositional thrust-related folding pulses affected the early Piacenzian-early Middle Pleistocene tectono-stratigraphic evolution of this sector. …”
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  13. 253

    Mechanical Properties and Control Rockburst Mechanism of Coal and Rock Mass with Bursting Liability in Deep Mining by Ming-tao Gao, Zhen-qi Song, Hui-qiang Duan, Heng-qi Xin, Jian-quan Tang

    Published 2020-01-01
    “…So, in the in-situ engineering practice, it is an important measure to improve the surface restraint and support strength of the coal roadway for reducing the occurrence intensity and probability of rockburst. (4) The combined measures of “the mining of double liberating seam + the implementation of large-diameter pressure relief borehole in advance of working face” is the very effective way to eliminate the rockburst accidents of working face in a protected coal seam and has an important guiding significance for the safe mining of rockburst mine.…”
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  14. 254

    Using Radiogenic Noble Gas Nuclides to Identify and Characterize Rock Fracturing by W. Payton Gardner, Stephen J. Bauer, William M. Kibikas, Brynna Siluk, Scott Broome, Chris Strickland, Christine Johnson, Vince Vermeul

    Published 2025-01-01
    “…Real‐time, in situ noble gases and reactive gases were monitored using a field‐deployed mass spectrometer and automated sampling system in a multilevel borehole array. Released gases were measured after two different detonations having distinct energy, pressure, and gas volume characteristics. …”
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  15. 255

    Numerical Simulation of Channelization Near the Wellbore due to Seepage Erosion in Unconsolidated Sands during Fluid Injection by Jin Sun, Shiguo Wu, Jingen Deng, Qingping Li, Qi Fan, Linwei Ma, Yanrui Liu

    Published 2021-01-01
    “…The dynamic formation process of channels around the borehole and its influencing factors are analyzed by this model. …”
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  16. 256

    Reactivation of a trap-boundary fault and its impacts on hydrocarbon migration and accumulation in Longkou 7 − 6 structure, Bohai Bay Basin: insights from geology, geophysics and b... by Xinyu Yan, Zhenliang Wang, Deying Wang, Lei Chen, Yanfei Gao, Jiangtao Wang

    Published 2024-09-01
    “…This study focuses on the trap-boundary fault within the Longkou 7 − 6 (LK7-6) structure, an ideal site for examining the impact of fault activity on hydrocarbon migration and accumulation. Seismic and borehole data were used to quantitatively investigate the history of fault growth and activation, as well as changes in fault-sealing capacity during reactivation. …”
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    Article
  17. 257

    The evolving roles of geophysics in environmental assessment, monitoring, and management of landfill leachate contaminant plumes: An overview by Joseph Omeiza Alao

    Published 2025-06-01
    “…Despite the significant contribution of geophysical techniques in understanding the behaviour of LLPs within the subsurface, it may not replace direct investigations such as geological borehole data and geochemical water analysis completely for adequate environmental monitoring. …”
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    Article
  18. 258

    Study on the crack propagation morphology and initiation law of coal rock under the action of underwater electric pulse by XianKai Bao, Bin Jiang, GuangQin Cui, XiaoFan Zhang, Tong Zhang, Wu Zhang

    Published 2025-01-01
    “…The results show that the cracks around the borehole of coal rock mass crack symmetrically under the action of high-voltage electric pulse in water. …”
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    Article
  19. 259

    Three-Dimensional Physical Simulation and Control Technology of Roof Movement Characteristics in Non-Pillar Gob-Side Entry Retaining by Roof Cutting by Xinzhu Hua, Guanfeng Chang, Xiao Liu, Bingjun Sun, Sen Yang, Enqian Wang, Chen Li

    Published 2021-01-01
    “…By monitoring the deformation of the surrounding rock and stress distribution of the roof, the skew deformation characteristics of roadway roof are obtained. By observing the borehole peeping technology, the roof subsidence near the goaf is determined to be greater than that of the solid coal side, and the roof subsidence of the gob-side entry retained by roof cutting is greater than that of the floor heave and two sides approaching. …”
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  20. 260

    Biomonitoring of Environmental Pollution Using Forest Tree Foliage Chemistry at Extremely Contaminated, Post-Industrial Sites by Justyna Likus-Cieślik, Paula Orlikowska, Marcin Pietrzykowski

    Published 2025-01-01
    “…The foliage samples were collected in two forest ecosystems exposed to industrial emissions: a zinc (Zn) and lead (Pb) smelter plant in Silesia (HCM) and a reclaimed forest on the site of the former borehole S mine Jeziórko (FJSM), in the Tarnobrzeg S deposit region (southern Poland). …”
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