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  1. No Access

    Article

    Cracking Patterns and Damage Evolution Characteristics of Coal with Bedding Structures Under Liquid Nitrogen Cooling

    Liquid nitrogen (LN2) fracturing has various advantages, such as low reservoir damage, minimal environmental impact, and excellent permeability. In this study, the cracking pattern and damage evolution characteri...

    Menglin Du, Feng Gao, Wenqi Zheng, Shanjie Su, Peng Li… in Natural Resources Research (2024)

  2. No Access

    Article

    Influence of Liquid Nitrogen Freeze–Thaw Cycles on Mechanical Behaviors and Permeability Properties of Coal Under Different Confining Pressures

    Liquid nitrogen freeze–thaw (LNFT) cycles can realize the high-volume fracturing of coalbed methane (CBM) reservoirs, because they can effectively improve the distribution of pores and cracks inside coal. To q...

    Peng Hou, Shanjie Su, Feng Gao, **n Liang… in Rock Mechanics and Rock Engineering (2024)

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    Article

    Variations in Stress Thresholds for Heated Granite Subjected to Rapid Cooling under Different Confining Pressures

    Liquid nitrogen has been proposed to promote fracture networks generated by hydraulic fracturing in geothermal reservoirs. To compare the deterioration in mechanical properties due to water and liquid nitrogen...

    Chunbo Zhou, Feng Gao, Chengzheng Cai, Shanjie Su… in Natural Resources Research (2022)

  4. No Access

    Article

    Influence of Liquid Nitrogen Cooling State on Mechanical Properties and Fracture Characteristics of Coal

    To determine the role of LN2-cooling in the fracturing process of the coal, the LN2-cooling process of the coal samples is divided into three states: initial state, frozen state, and freeze–thaw state. Changes in...

    Peng Hou, Shanjie Su, Feng Gao, **n Liang… in Rock Mechanics and Rock Engineering (2022)

  5. No Access

    Article

    Effect of liquid nitrogen thermal shock on structure damage and brittleness properties of high-temperature marble

    As a new waterless fracturing technology, liquid nitrogen (LN2) fracturing is expected to be applied in the exploitation of geothermal energy. Therefore, understanding the thermomechanical features of hot rock un...

    Peng Hou, Shanjie Su, Yun Zhang, Feng Gao… in Geomechanics and Geophysics for Geo-Energy… (2022)

  6. No Access

    Article

    Role of Liquid Nitrogen Cooling State in Physical and Tensile Properties of Sandstone

    The permeability of tight sandstone gas reservoirs can be improved using liquid nitrogen (LN2) cryogenic fracturing. To evaluate the effect of the LN2-cooling state on the tensile failure behaviors of the sandsto...

    Yanan Gao, Peng Hou, Shanjie Su, Shengcheng Wang… in International Journal of Thermophysics (2022)

  7. No Access

    Article

    Experimental Study on the Damage and Cracking Characteristics of Bedded Coal Subjected to Liquid Nitrogen Cooling

    Liquid nitrogen (LN2) cooling can induce significant cracking damage in coalbed methane (CBM) reservoirs. To investigate the combined effects of LN2 cooling and bedding angles on the mechanical behaviors of bedde...

    Menglin Du, Feng Gao, Chengzheng Cai, Shanjie Su… in Rock Mechanics and Rock Engineering (2021)