Via the double oxygen lancing device, the oxygen is led to pass through the oxygen chamber for dividing flow and then delivered to the oxygen lance and igniter separately. The member to be boring or cutting is firstly coated with antidetonants and chocked flow layers and then covered with protective cover at its lancing portion. The lower end of oxygen ance is firstly heated to combustion state by igniter and then fed with oxygen to make it produce violent oxidation under high temp. The conccrete is melted into magma and under the action of oxygen pressure to form hole by slagging or cutting off by boring. It is widely applicable to members of concrete, brick and stone for boring, holing and cutting. |