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Optimizing the Structure of the Straight Cone Nozzle and the Parameters of Borehole Hydraulic Mining for Huadian Oil Shale Based on Experimental Research

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  • Jiwei Wen

    (Center for Postdoctoral Studies of Geological Resources and Geological Engineering, Chengdu University of Technology, Chengdu 610059, China
    State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China
    College of Environment and Civil Engineering, Chengdu University of Technology, Chengdu 610059, China
    Trenchless Technology Center, Louisiana Tech University, Ruston, LA 71270, USA)

  • Chen Chen

    (Key Laboratory of Drilling and Exploitation Technology in Complex Conditions of Ministry of Land and Resources, Jilin University, Changchun 130026, China
    National-Local Joint Engineering Laboratory of In-Situ Conversion, Drilling and Exploitation Technology for Oil Shale, Changchun 130021, China
    College of Construction Engineering, Jilin University, Changchun 130026, China)

Abstract

Oil shale is a kind of potential alternative energy source for petroleum and has attracted the attention of energy researchers all over the world. Borehole hydraulic mining has more prominent advantages than both conventional open-pit mining and underground mining. It is very important to attempt to use the borehole hydraulic mining method to exploit underground oil shale. The nozzle is the key component of borehole hydraulic mining and reasonable mining parameters are also crucial in exploiting underground oil shale efficiently. The straight cone nozzle and the oil shale of Huadian area will be taken as the research objects. The self-developed, multifunctional, experimental device can test both the jet’s performance as well as the breaking of oil shale by the high-pressure water jet using the straight cone nozzle and varying structural parameters. Comprehensive analysis of the results of an orthogonal experimental design, including range analysis and variance analysis, demonstrate the optimal structural parameters of a straight cone nozzle as follows: the outlet diameter is 4 mm, the length to diameter ratio is 2.5, and the contraction angle is 60°. In addition, in order to maximize the efficiency of borehole hydraulic mining for Huadian oil shale, the non-submerged jet should be placed parallel to the oil shale bedding. These results can provide scientific and valuable references for borehole hydraulic mining of oil shale.

Suggested Citation

  • Jiwei Wen & Chen Chen, 2017. "Optimizing the Structure of the Straight Cone Nozzle and the Parameters of Borehole Hydraulic Mining for Huadian Oil Shale Based on Experimental Research," Energies, MDPI, vol. 10(12), pages 1-14, December.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:12:p:2021-:d:121276
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    References listed on IDEAS

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    1. Yiyu Lu & Zhe Zhou & Zhaolong Ge & Xinwei Zhang & Qian Li, 2015. "Research on and Design of a Self-Propelled Nozzle for the Tree-Type Drilling Technique in Underground Coal Mines," Energies, MDPI, vol. 8(12), pages 1-12, December.
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    Cited by:

    1. Marcin Maksymowicz & Aleksander Frejowski & Adam Bajcar & Bartłomiej Jura, 2022. "Application of Hydro Borehole Mining (HBM) Technology for Lignite Extraction—An Environmental Assessment (LCA) and a Comparative Study with the Opencast Method," Energies, MDPI, vol. 15(13), pages 1-20, July.

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