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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 한국계산역학회 Computers and Concrete, An International Journal Computers and Concrete, An International Journal Vol.25 No.2
- 발행연도
- 2020.1
- 수록면
- 145 - 154 (10page)
이용수
초록· 키워드
오류제보하기
For the influence of the propagation law of stress wave at the coal-rock interface during the pre-blasting of the top coal in top coal mining, the ANSYS-LS/DYNA fluid-solid coupling algorithm was used to numerical calculation and the lifedeath element method was used to simulate the propagation of explosion cracks. The equation of the crushing zone and the fracturing zone were derived. The results were calculated and showed that the crushing radius is 14.6 cm and the fracturing radius is 35.8 cm. With the increase of the angles between the borehole and the coal-rock interface, the vibration velocity of the coal particles and the rock particles at the interface decreases gradually, and the transmission coefficient of the stress wave from the coal mass into the rock mass decreases gradually. When the angle between the borehole and the coal-rock interface is 0°, the overall crushing degree is about 11% and up to the largest. With the increase of the distance from the charge to the coal-rock interface, the stress wave transmission coefficient and the crushing degree of the coal-rock are gradually decreased. At the distance of 50 cm, the crushing degree of the coal-rock reached the maximum of approximately 12.3%.
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참고문헌 (37)
참고문헌 신청
Аh, Х. / 1980 / Physical Process of Rock Blasting in Minin / Metallurgical Industry Press
Bai, J. Z. / 2005 / Theoretical Basis and Case Analysis of LS-DYNA3D / Science Press
Biao Liu / 2019 / Finite element modeling of bond-slip performance of section steel reinforced concrete / Computers and Concrete, An International Journal 24(3):237~247
Byers, B. W. / 2002 / Critical review of theories of steady non-ideal two-dimensional detonation of condensed explosives, Confidential Report to HSBM participants, Mass Action
Li Chun-rui / 2009 / The numerical analysis of borehole blasting and application in coal mine roof-weaken / Procedia Earth and Planetary Science 1(1):451~459
Bai, J. Z. / 2005 / Theoretical Basis and Case Analysis of LS-DYNA3D / Science Press
Biao Liu / 2019 / Finite element modeling of bond-slip performance of section steel reinforced concrete / Computers and Concrete, An International Journal 24(3):237~247
Byers, B. W. / 2002 / Critical review of theories of steady non-ideal two-dimensional detonation of condensed explosives, Confidential Report to HSBM participants, Mass Action
Li Chun-rui / 2009 / The numerical analysis of borehole blasting and application in coal mine roof-weaken / Procedia Earth and Planetary Science 1(1):451~459
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