RU97113873A - METHOD FOR INSULATING UNDERGROUND STORAGE OF TOXIC WASTE IN SALINE ROCKS - Google Patents

Claims (10)

1. The method of isolation of an underground storage of toxic waste in saline rocks, including the creation of a storage of toxic waste by tunneling with inter-chamber pillars, the excavation of mine workings connecting the storage to the mine shaft, the creation of V-shaped sections in the longitudinal profile of these mine workings, characterized in that a pipeline is laid through the connection openings in the storage through the V-shaped sections and, in case of a threat of flooding, the V-shaped section is flooded with brine saturated with components, of which There is an array surrounding this section, after which gas or air is supplied through the pipeline to the storage in an amount that compensates for the increasing pressure on the brine of the growing water column as its height increases in the flooded mined-out space.  2. The method according to claim 1, characterized in that the air or gas creating a compensating pressure in the storage is supplied from cavities previously formed in the saline rocks.  3. The method according to claim 2, characterized in that the cavity for storing gas or air is created by underground leaching.  4. The method according to claims 2 and 3, characterized in that the gas or air is contained in the leach cavity under pressure exceeding the pressure of the water column, which can act on the brine in the V-shaped section of the bridge, but not exceeding the weight of the column of rocks lying over repository. 5. The method according to PP.2 and 3, characterized in that the leaching cavity create a volume determined from the ratio:

where V ₂ is the volume of the leaching cavity;
V ₁ - empty storage volume of waste;
P ₁ - column pressure of saline water that flooded the mine and shaft shafts;
P ₂ - pressure of compressed air in the leach chambers.  6. The method according to claims 1 and 2, characterized in that compressed air or gas from the leaching cavities is dosed in a quantity in such a quantity that the level of brine in the V-shaped section does not fall from the side of the storage to the level of the roof of its lower part and did not rise to the level of the soil of the connecting excavation, into which the V-shaped section passes.  7. The method according to PP.1 and 5, characterized in that, when raising or lowering the level of brine in the V-shaped section of the generation from the storage to the specified values, the compressed air or gas supply to the storage is adjusted automatically.  8. The method according to claim 1, characterized in that use pipelines made of materials that are not susceptible to corrosion in salt brines, or isolate the pipelines with coatings inert to such brines.  9. The method according to claims 1, 6, 7, 8, characterized in that, after stabilization of the level of flooding waters, the pipelines are hermetically sealed.  10. The method according to PP. 1, 6, 7, characterized in that, in the vicinity of the V-shaped sections of the mine workings, buried chambers pass, a concentrated brine inert in relation to the salt mass surrounding these sections is placed in them, and if there is a risk of flooding, the brine is pumped into V-shaped sections, and in the event of liquidation of the danger of flooding, they pump it back into the buried chambers.