Abstract
Complex mining and geological conditions of carrying out underground works require development of new methods for support of workings, using materials with designed physical and mechanical properties. Effective stabilization of underground workings may be carried out with the help of shotcrete, modified by synthetic butadiene styrene latex. Polymercement shotcrete coating features higher elasticity thanks to low modulus of deformation, as well as higher tensile strength. Higher water-tightness of polymercement shotcrete ensures reliable protection of stabilized rocks from soaking and failing. Finally, high degree of adhesion between latex shotcrete and rock base, ensures the monolithic character of the support and its high adhesion strength with rocks. The paper gives the results of experimental work and industrial introduction in the underground workings, driven in nonstable crushed permafrost and under conditions of weathered aleuroliths and sandstones of the Dangara hydraulic tunnel.
Published Version
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