MAGNESIA PLUGGING-SEALING MATERIAL Russian patent published in 1997 - IPC

FIELD: plugging of mine workings. SUBSTANCE: magnesia plugging-sealing material contains magnesium silicate binding agent including, mas.%: MgO, 98-70; CaO, 2-8; $$$, 15-50; $$$, 1-12. Magnesium salt is used in form of water-soluble salt of magnesium and sodium chloride-sulfate with ratio $$$/$$$+NaCl equalling (10-25):1. In preparation of the plugging material, the initial ingredients are used in the following quantities, mas.%: magnesium silicate binding agent 67-72; water soluble magnesium and sodium chloride-sulfate 7-10; water, the balance. EFFECT: higher efficiency. 1 tbl