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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 국제구조공학회 Structural Engineering and Mechanics, An Int'l Journal Structural Engineering and Mechanics, An Int'l Journal Vol.80 No.5
- 발행연도
- 2021.12
- 수록면
- 523 - 538 (16page)
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초록· 키워드
오류제보하기
The mechanical behaviour and stability of coal mining engineering underground is significantly affected by ground water. In this study, nuclear magnetic resonance imaging (NMRI) technique was employed to determine the water distribution characteristics in coal specimens during saturation process, based on which the functional rule for water distribution was proposed. Then, using discrete element method (DEM), an innovative numerical modelling method was developed to simulate water-weakening effect on coal behaviour considering moisture content and water distribution. Three water distribution numerical models, namely surface-wetting model, core-wetting model and uniform-wetting model, were established to explore the water distribution influences. The feasibility and validity of the surface-wetting model were further demonstrated by comparing the simulation results with laboratory results. The investigation reveals that coal mechanical properties are affected by both water saturation coefficient and water distribution condition. For all water distribution models, micro-cracks always initiate and nucleate in the water-rich area and thus lead to distinct macro fracture characteristics. With the increase of water saturation coefficient, the failure of coal tends to be less violent with less cracks and ejected fragments. In addition, the corewetting specimen is more sensitive to water than specimens with other water distribution models.
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참고문헌 (43)
참고문헌 신청
Cai, X. / 2020 / Water-induced variations in dynamic behavior and failure characteristics of sandstone subjected to simulated geo-stress / Int. J. Rock Mech. Min. Sci 130:104339
Cai, X. / 2020 / Water saturation effects on thermal infrared radiation features of rock materials during deformation and fracturing / Rock Mech. Rock Eng 53(11):4839~4856
Cai, X. / 2020 / Water saturation effects on dynamic behavior and microstructure damage of sandstone : Phenomena and mechanisms / Eng. Geol 276:105760
Cao, R. / 2016 / An experimental and numerical study on mechanical behavior of ubiquitous-joint brittle rock-like specimens under uniaxial compression / Rock Mech. Rock Eng 49(11):4319~4338
Chen, G. / 2019 / Weakening effects of the presence of water on the brittleness of hard sandstone / Bull. Eng. Geol. Environ 78(3):1471~1483
Cai, X. / 2020 / Water saturation effects on thermal infrared radiation features of rock materials during deformation and fracturing / Rock Mech. Rock Eng 53(11):4839~4856
Cai, X. / 2020 / Water saturation effects on dynamic behavior and microstructure damage of sandstone : Phenomena and mechanisms / Eng. Geol 276:105760
Cao, R. / 2016 / An experimental and numerical study on mechanical behavior of ubiquitous-joint brittle rock-like specimens under uniaxial compression / Rock Mech. Rock Eng 49(11):4319~4338
Chen, G. / 2019 / Weakening effects of the presence of water on the brittleness of hard sandstone / Bull. Eng. Geol. Environ 78(3):1471~1483
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