Investigation on rational width of coal pillar and roadway support in isolated panel of extra-thick coal seam
نویسندگان
چکیده
The methods of numerical simulation and on-site measurement is used to analysis reasonable coal pillar width (CPW) roadway support in isolated panel extra-thick seam. Numerical modeling shows that a maximum vertical stress 32.9 MPa, concentration factor reaches 2.99, which more affected by the mining adjacent panel, peak on both sides higher. By comparing failure deformation characteristics different widths, it shown 6 m can reach load requirements overlying strata ensure an undamaged controllable environment. According asymmetry surrounding rock deformation, final joint control technology asymmetric anchor cables, high intensity grouting proposed get good effect site. research results provide guidance value for under similar geological condition.
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ژورنال
عنوان ژورنال: Frontiers in Earth Science
سال: 2023
ISSN: ['2296-6463']
DOI: https://doi.org/10.3389/feart.2023.1125678