METHOD OF ROCK DESTRUCTION (VERSIONS) Russian patent published in 2009 - IPC E21C37/02 

FIELD: mining.

SUBSTANCE: invention refers to mining and can be implemented for splitting of lumps, disassembly of constructions, for primary breaking, and for excavation of construction stone and crystal raw material. The method includes drilling blast holes, and supplying non-Newtonian liquid and wedges into them applying alternated impact load thereon. Non-Newtonian liquid is supplied under pressure via a tube, the gap between which and the walls of the blast hole is sealed by means of a bushing secured on the tube; the bushing is designed to slide along the blast hole walls. The tube is advanced into the blast hole till it rests on a bottom hole prior to supply of non-Newtonian liquid into it. Under the second version a heating element and loose material are supplied into the blast hole; loose material melts under temperature effect and transforms into non-Newtonian liquid filling the blast hole to a preset level. After that the heating element is extracted from the blast hole. Destruction of rock is performed after drop of temperature in the blast hole to the temperature of rock. Under the third version initially liquid is supplied into the blast hole, then loose material is supplied; liquid and loose material interact and create non-Newtonian liquid. In the fourth version first rods are inserted into the blast hole, then liquid is supplied; interacting, they create non-Newtonian liquid. In the fifth version non-Newtonian liquid is supplied into the blast hole; viscosity of the liquid is essentially dependant from temperature of cylinders strung on a wire to the end of which the heating element is connected. After that temperature of the heating element is raised till adjacent non-Newtonian liquid transits into liquid state, then the heating element is being transferred from bottom hole the head of the blast hole. Non-melted cylinders are forced through into direction of the bottom hole.

EFFECT: increased efficiency of method and reduced labour intensiveness and cost of destruction.

8 cl, 7 dwg