Application of abrasive jet axial roof cutting technology in hard roof working face
In order to effectively avoid the problem of increased risk of impact on the working face caused by the suspension of the hard roof,taking the Ⅰ 010206 working face of Kuangou Coal Mine as the research object,the abrasive jet axial roof cutting technology was proposed,and key technical parameters were designed based on the actual site conditions.Practice shows that the abrasive jet axial roof cutting technology can effectively reduce the strength of the hard roof,weaken surrounding rock activity and dynamic load effects,and a-chieve good anti impact effects.
hard roofimpact ground pressureabrasive jethydraulic fracturingparameter design
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