Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    Mechanism and criteria of dilatancy-induced disaster of coal containing gas

    Access Status
    Fulltext not available
    Authors
    Hu, Z.
    Wu, S.
    Yin, Zhiqiang
    Date
    2017
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Hu, Z. and Wu, S. and Yin, Z. 2017. Mechanism and criteria of dilatancy-induced disaster of coal containing gas. Journal of Engineering Science and Technology Review. 10 (6): pp. 163-170.
    Source Title
    Journal of Engineering Science and Technology Review
    DOI
    10.25103/jestr.106.21
    ISSN
    1791-9320
    School
    School of Civil and Mechanical Engineering (CME)
    URI
    http://hdl.handle.net/20.500.11937/70761
    Collection
    • Curtin Research Publications
    Abstract

    © 2017 Eastern Macedonia and Thrace Institute of Technology. The key to the prevention and control of coal and gas dynamic disaster is the mastery of its mechanism. However, plenty of factors induce coal and gas dynamic disasters, and the mechanism is complex, especially the dilatancy of coal and rock by mining. The main control factors of dynamic disasters change, thereby making such disasters difficult to manage. The mechanism of dilatancy caused by coal crack was analyzed based on the physical mechanical characteristics of gassy coal to explore the mechanism of coal and gas dynamic disaster induced by coal dilatancy in the working face. The energy evolution characteristics of the coal face during dilatancy stage were studied, and the safety evaluation index of disaster caused by the dilatancy was presented. Results show that the coal dilatancy in the working face depends on the force environment and the physical mechanical properties of coal. With the increase in initial gas pressure, elastic modulus, compressive strength, and critical stress value of the dilatancy are reduced, resistance to deformation and destruction of the coal containing gas is weakened, and the mechanical phenomenon of dilatancy easily occurs. The change gradient of gas pressure and gas expansion energy can increase with the increase in initial gas pressure in the dilatancy moment. The safety evaluation index increases from 0.09 to 1.29 when the initial gas pressure reaches 3 MPa. This finding shows that the safety evaluation index of disaster caused by the dilatancy has a nonlinear positive correlation with gas pressure. The dynamic disaster can only be caused by the effect of the mining action at a gas pressure of 3 MPa. This study provides a theoretical reference for the prevention and control of coal and gas dynamic disasters.

    Related items

    Showing items related by title, author, creator and subject.

    • Characterizing dilatation energy of released gas from underground coal seam by drilling boreholes
      Yu, B.; Cheng, Jianwei; Yang, S.; Wang, D. (2014)
      © 2014, Springer Science+Business Media Dordrecht. In order to precisely measure the dilatation energy of the released gas from underground coal seam, this paper initiated a study on the dilatation energy of gas released ...
    • Study on Dynamic Disaster Mechanisms of Thick Hard Roof Induced by Hydraulic Fracturing in Surface Vertical Well
      Shang, Xiaoguang; Zhu, Sitao; Jiang, Fuxing; Liu, Jinhai; Li, Jiajie; Hitch, Michael ; Liu, Hongliang; Tang, Shibin; Zhu, Chun (2022)
      With the increase in mining depth and the deterioration of mining conditions, thick and hard overburden movement frequently induces mine earthquakes and rock bursts. Some mines are expected to prevent and control super ...
    • A study on the characteristics of microseismic signal during deformation and failure of different materials under uniaxial compression
      Li, C.; Xu, X.; Dong, L.; Sarmadivaleh, Mohammad; Sun, X. (2016)
      © 2016 Chengwu Li et al. With the decline of shallow coal reserves and increase in demand of coal consumption, the hazard of coal and rock dynamic disasters is expanding. In this paper, we conducted some laboratory scale ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.