Geomechanics and Engineering

  • 제14권5호
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  • Pages.429-437
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  • 2018
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  • 2005-307X(pISSN)
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  • 2092-6219(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Optimal pre-conditioning and support designs of floor heave in deep roadways

  • Wang, Chunlai (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Li, Guangyong (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Gao, Ansen (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Shi, Feng (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Lu, Zhijiang (Faculty of Resources & Safety Engineering, China University of Mining & Technology) ;
  • Lu, Hui (Faculty of Resources & Safety Engineering, China University of Mining & Technology)
  • 투고 : 2016.10.13
  • 심사 : 2017.09.03
  • 발행 : 2018.04.10
⟨ 이전 논문 다음 논문 ⟩

초록

In order to reduce deformation of roadway floor heave in deep underground soft rockmass, four support design patterns were analyzed using the Fast Lagrangian Analysis of Continua (FLAC)3D, including the traditional bolting (Design 1), the bolting with the backbreak in floor (Design 2), the full anchorage bolting with the backbreak in floor (Design 3) and the full anchorage bolting with the bolt-grouting backbreak in floor (Design 4). Results show that the design pattern 4, the full anchorage bolting with the bolt-grouting backbreak in floor, was the best one to reduce the deformation and failure of the roadway, the floor deformation was reduced at 88.38% than the design 1, and these parameters, maximum vertical stress, maximum horizontal displacement and maximum horizontal stress, were greater than 1.69%, 5.96% and 9.97%. However, it was perfectly acceptable with the floor heave results. The optimized design pattern 4 provided a meaningful and reliable support for the roadway in deep underground coal mine.

키워드

과제정보

연구 과제 주관 기관 : National Natural Science Foundation of China, Central Universities

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