The method of preparation of frozen rocks

 

(57) Abstract:

Usage: in the extraction of minerals from placer deposits. Essence: prepare the ground razvarivat wells, in which place the explosive charge and calabresi reagent with a strong dispersing effect, for example, the melt of metal chlorides. On the lower surface of the polygon construct a drainage sump and on the flanks of the post Gerogly, through which the produced water in the exploded array and defrosting rocks. While the sump build after detonation of explosive charges in boreholes. table 1.

The invention relates to the mining industry and can be used in the development of placer mineral deposits for the preparation of frozen soils for excavation.

The known method of preparing frozen loose deposits to mining, including drilling in the prepared array of wells, the loading wells, blasting them explosive charge and thawing shattered rocks by submitting a subsequently water, drilling water intake and drainage ditches (ed.St. USSR N 717940, CL E 21 41/00, 1978).

The disadvantage of this method is the low quality of defrost, which leads to low productivity mining is t ultimately on the extraction of useful component in the enrichment process.

The aim of the invention is to improve the quality of the defrost and the increase of extracting useful component due to the use in the preparation of teplootrazhayuschikh reagents with expression dispersing effect.

For this purpose, the known method of preparation of frozen rocks, including drilling in rocks of the wells, the loading wells charges digging and blasting, defrosting of the rocks by filing them in water in wells together with charges loosening place calabresi reagent with a strong dispersing effect, and after blasting holes on a rendered polygon construct drainage sump, on the flanks of the landfill post Gerogly, through which the produced water in the exploded array.

The method of preparation of frozen rocks is as follows.

Produce drilling to prepare the ground, in wells place an explosive charge and calabresi reagent with a strong dispersing effect type, the melt of metal chlorides (PHM), aluminium sulphate, etc. blasting is chosen such that the explosion was loosening rocks for a more uniform distribution of the reagent in the body prepared to reconsider placing the reagent portion, Packed in a waterproof shell made from easily destroyed in the explosion of the material. On the lower surface of the polygon construct a drainage sump and on the flanks of the post Gerogly by drilling or penetration, mount the system of conduits with the possibility of taking water from the drainage sump. Then make the water flow into the body of rendered polygon. In the process of completing the reaction occurs between the reagent and water with evolution of heat, begins the process of defrosting. After complete saturation of the body of ground water and fill the drainage sump begin pumping water from the last filing in located on the flanks of Gerogly. The result is a circulating stream of water having the direction from the bottom of the array to the drainage sump, as the temperature of the water flowing through Gerogly, above the temperature of the water filling the array. In addition, there is an additional heating due to the heat from that part of the reagent, which is not reacted during the initial saturation of the array. Formed in the body of the array of different areas, between which there is a constant heat transfer, lead to more intense defrost and eliminates the prob is a result of reagent. The effectiveness of the dispersion increases as a result of the fact that prior to contact with the reagent particles were subjected to explosive destruction.

P R I m m e R. thawing permafrost is at the range with the following parameters: length 300 m, width 50 m, power sand 6 m

The results of the work on the prototype method and the proposed method are given in the table.

The use of the proposed method for the preparation of frozen rocks improves the quality of defrost and increases the extraction of useful component in the enrichment process due to better dispersion of clay particles.

The use of the proposed method in comparison with the prototype provides increased intensity defrost 2 times and increase extraction by 3-18%

The METHOD of PREPARATION of FROZEN ROCKS, including drilling in rocks of the wells, the loading wells charges digging and blasting, defrosting of the rocks by filing them in water, characterized in that, with the aim of improving the quality of defrost and increasing the recovery of useful component in wells together with charges loosening place calabresi reagent with a strong dispersing effect, and after blasting holes on a rendered polygon construct the initial array.

 

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