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room and pillar mining of limestone china

Jan 16 2018 · The pillar design guidelines have been incorporated into software packages that can be used for the preliminary design of pillars for longwall gateroads and retreat mining in coal and in limestone mines The software packages are ALPS Analysis of Longwall Pillar Stability for longwall gateroad pillars in coal... 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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