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roof bolting in a coal mine

Without a doubt roof bolting has been the single most important technological development in the field of ground control in the entire history of mining Bolting was substituted for timbering in US underground coal mines in the late 1940’s and it was “accepted by the mining industry with greater rapidity than any other mining... As a leading global manufacturer of crushing equipment, milling equipment,dressing equipment,drying equipment and briquette equipment etc. we offer advanced, rational solutions for any size-reduction requirements, including quarry, aggregate, grinding production and complete plant plan.

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