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Published in 2021 at "International journal of mining science and technology"
DOI: 10.1016/j.ijmst.2021.01.005
Abstract: Abstract The hard roof difficult to collapse easily causes gas accumulation, which threatens the production safety of coal mine. Therefore, roof pre-cracking is required. Although blasting and hydraulic fracturing can also crack the roof, blasting…
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Keywords:
agents scdas;
borehole;
soundless cracking;
cracking demolition ... See more keywords