17 pages matching LONGWALL STABILIZATION MATERIALS in this book
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acrylic resin affect the strength ALTERNATIVE LONGWALL STABILIZATION and/or applied load approximately ASSESSMENT OF ALTERNATIVE ASTM standards bad roof binder material approaches binder material's Bond strength 700 bond strength test bonded cylinder Bureau of Mines carried by bonded coal composite cylinder compressive strength consolidate fractured roof control cylinder criteria cylinder wedges deformable disqualified from further dry conditions elliptical surface epoxy cement five remaining binder fractured roof strata H bO H H H high-aluminous cement ical injected LABORATORY ASSESSMENT longwall faces longwall mining LONGWALL STABILIZATION MATERIALS magnesium oxychloride magnesium phosphate mate material for stabilizing maximum load carried Minimal exothermic heat nonflammable nontoxic phenolic resin physical strength properties polyurethane properties and water psi under dry psi under wet rial roof bolts series of tests shear strength Sodium silicate stabilizing fractured roof strata consolidation technique tensile strength test tensile test toxic Ultrafine cement viscosity Water Tolerance Test wet conditions