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  1. 2041

    Characterizing Groundwater Level Response to Precipitation at Multiple Timescales in the Lubei Plain Region Using Transfer Function Analysis by Lewei Xu, Huili Gong, Beibei Chen, Chaofan Zhou, Xueting Zhong, Ziyao Ma, Dexin Meng

    Published 2025-01-01
    “…We applied this framework to the Lubei Plain (LBP), and the findings indicated the following: (1) Annual precipitation in the LBP decreased from southeast to northwest, with July and August contributing 51.5% of total rainfall; spatial autocorrelation of GWL was high and was influenced by geological conditions and cropland irrigation. (2) The coherence between GWL and precipitation was 0.96 in the high-precipitation areas but was only 0.6 in overexploited areas, and sandy soils enhanced the effective groundwater recharge, with a gain of 1.65 and a lag time of 2.1 months. (3) Over interannual scales, GWL response was driven by precipitation distribution and aquifer characteristics, while shorter timescales (4 months) were significantly affected by human activities, with a longer lag time in overexploited areas, which was nearly 60% longer than areas that were not overexploited. (4) Groundwater exploitation reduced the seasonality of GWL, and irrigation reduced the coherence between GWL and precipitation (0.5), with a gain of approximately 0.5, while a coherence of 0.8 and a gain of 3.5 were observed in the non-irrigation period. …”
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  2. 2042

    Effective Stress Factor Analysis of Proppant for Multi-stage Fracturing in Horizontal Wells by Bo Cai, Rui Gao, Chunming He, Jin Chen, Ning Cheng, Tiancheng Liang, Guifu Duan, Chuanyou Meng, Haifeng Fu, Haoyu Zhang

    Published 2022-01-01
    “…The results show that, during the multi-stage hydraulic fracturing operation in horizontal wells, the stress on proppants is not only related to geological factors such as reservoir closure stress, but also closely related to total injection volume, cluster spacing, liquid type, injection displacement and post fracture management. …”
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  3. 2043

    A Research on the Effect of Heterogeneities on Sandstone Matrix Acidizing Performance by Jianye Mou, Lei Wang, Shicheng Zhang, Xinfang Ma, Boyang Li

    Published 2019-01-01
    “…Firstly, a heterogeneity model is built for mineral and porosity distributions by using the semivariogram model of geological statistics, based on which we generate spatially correlated porosity and mineral distributions. …”
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  4. 2044

    Identification of Hydraulic Connection Points between Different Confined Aquifers in the Liyazhuang Coal Mine by Zhenghe Liu, Peiyun Zhao, Lusheng Yang, Jingui Zhao, Hailong Ye, Jun Yang, Rujun Mo

    Published 2021-01-01
    “…Water inrush from coal seam floors is one major geological obstacle hindering safe and efficient production activities in mines. …”
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  5. 2045

    DETERMINATION OF HEAVY METALS AND ENVIRONMENTAL HEALTH STATUS OF AGRO SOILS IN IKOT ABASI, NIGER DELTA, NIGERIA by Usoro M. Etesin, Iniobong J. Ogbonna

    Published 2023-08-01
    “…The toxic metals enter the soil-agro ecosystem through natural processes derived from anthropogenic activities and geological weathered materials. This study is aimed at investigating the contamination status of soils from Ikot Abasi, Akwa Ibom State, being an area of intense agricultural and industrial activities. …”
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  6. 2046

    Mechanical Mechanism and Propagation Law of Fissure-Tip Cracks of Large-Size Rock Specimens with Two Precut Fissures by Liming Yin, Ming Li, Wenbin Sun, Juntao Chen, Bin Liu, Ziqi Wang

    Published 2021-01-01
    “…The rock is a kind of geological medium with damages of different degrees including fissures, faults, joints, and other structural defects. …”
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  7. 2047

    Study on Roof-Coal Caving Characteristics with Complicated Structure by Fully Mechanized Caving Mining by Yunpei Liang, Lei Li, Xuelong Li, Kequan Wang, Jinhua Chen, Zhongguang Sun, Xuelin Yang

    Published 2019-01-01
    “…Meanwhile, based on the geological settings of Qinyuan coal mine, numerical simulation on roof-coal caving law under different thicknesses of hard or soft coal and gangue has been performed using UDEC software. …”
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  8. 2048

    Adaptability of the Cutter-Head of the Earth Pressure Balance (EPB) Shield Machine in Water-Rich Sandy and Cobble Strata: A Case Study by Chaodong Wan, Zhiyi Jin

    Published 2020-01-01
    “…The results indicate that the opening rate, maximum opening size, and the opening position of the cutter-head are key factors that affected the geological adaptability of the shield machine in water-rich sandy and cobble strata. …”
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  9. 2049
  10. 2050

    Experimental Study on Uniaxial Compression Fracture Process of Marble Specimens with Circular Holes with Different Diameters by Peng Yan-yan, Xing Ming-hong, Lin Qun-chao, Guo Peng-fei

    Published 2022-01-01
    “…After a long period of geological tectonic action, the rock mass develops defects such as pores and fissures of different sizes and scales. …”
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  11. 2051
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  18. 2058

    Research and Application of Hydraulic Punching Pressure Relief Antireflection Mechanism in Deep “Three-Soft” Outburst Coal Seam by Beifang Gu, Yanling Wu

    Published 2021-01-01
    “…Consequently, it has promotion and reference significance for gas drainage in coal seam of the same geological type.…”
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  19. 2059
  20. 2060