By Gerhard Braeuner
The preventive tools defined have proved powerful. They contain laying out the workings in any such manner as to reduce harmful concentrations of floor stresses, and early removing by way of blasting, drilling, or water infusion. An account of those tools as utilized in German coal mines, the private on this planet. Contents: Rockbursts & related phenomena; stipulations of prevalence; impression of rock tension; Bursting & nonbursting coal; long term prevention; Direct prevention; Borehole styles for direct prevention; Destressing tools; Case histories.
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