SU1671860A1 - A method of hydraulic mining of minerals from productive wells - Google Patents

Abstract

The invention relates to the mining industry and m. used in the development of minerals (PI). The goal is to reduce the costs of hydraulic extraction of PI from the array of the folded structure by reducing the costs of destruction of the massif by using its properties and forces of rock pressure. The method of borehole hydraulic mining PI from the productive stratum includes the opening of the stratum by wells (C). Then, the direction of folding around each C is determined and the erosion of the stratum by hydromonitors from C is effected. The erosion of the productive stratum is carried out in three stages. In the first, in the direction of falling folds along C, in the second, in the opposite direction until a set of natural equilibrium is formed after the rock mass has collapsed, and in the third, the base of the set is eroded by the fall. Consequently, all operations of the hydraulic extraction process are aimed at developing the processes of self-destruction of PI. 1 il.

Description

The invention relates to the mining industry and can be used in the development of minerals characterized by a folded structure, water content and low strength (weakness) of rocks.

The purpose of the invention is to reduce the costs of hydroproduction of minerals from the array of folded structure by reducing the costs of destruction of the massif by using its properties and rock pressure forces.

The drawing shows the implementation of the proposed method.

From the surface into the productive formation of the mineral, a well 1 is placed, in which 2 becoming destructive productive formation 3 is located. Before the productive formation begins to erode, the direction of geological folding of mineral deposits around it is determined based on geological data obtained from drilling 1. within the productive stratum. After determining the direction of folding 4 and the angle of incidence of the mineral (productive stratum), proceed to the erosion of the thickness of the stream of water directed from the destructive projectile at the beginning in the direction of the fall of the folds of the thickness of the well. The erosion by the dip of the folds is carried out until the jet erodes the productive stratum (by the length of the jet). The indicator of the erosion termination on the dip will be

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dullness to the surface of clarified water not enriched in minerals, that is, until the formation of pulp is stopped. Then the erosion of the productivity of the sequence continues in the opposite direction (in the uprising) until the formation of a set of 5 natural equilibrium. Repulsed mineral 6 accumulates in the lower part, formed during erosion of chamber 7, and is pumped out along well 1 to the surface, after which erosion is again started in a fall with a sweep of the arch of the arch in the fall and the process is repeated.

The erosion is initially carried out in the direction of the fall of the folds, because the energy intensity of destruction in the immediate vicinity of the well in both directions is quite high, but by beginning to wash away the fall of the folds and form here a small amount of space developed, favorable conditions are created for the subsequent erosion and self-destruction of the useful fossil in the opposite direction (for the uprising). In this case, the initially created generated space on the fall performs the function of the compensation space. To begin the erosion, the stress field around the well can be considered natural (unmeasured).

Then erosion is carried out in the opposite direction.

After the initial formation of the reservoir (in the fall) and the beginning of the erosion in the uprising, rock pressure begins to develop. The orientation of the folds contributes to the collapse of the array and its transportation. Collapse may develop along the crease by an amount greater than the erosion radius of the downhole jetting machine, and under the action of a gravity plate, the mass slides to the well. This continues until a well is formed around the developed zone of the vault of the natural p

In this case, one fifth of the roof will be lower than the well in the fall, and the array adjacent to the well from the side of the fall will be unloaded from the voltage. Therefore, repeated erosion from the side of fall will again be effective, as erosion of the previously destroyed mineral that supported the base of the roof will occur, and self-destruction will continue again. In order to intensify self-destruction of the entire roof, the erosion from the side of fall continues as zone of action of the monitor.

Thus, all operations of the hydraulic extraction process are aimed at developing the processes of self-shattering of the mineral, after the start of erosion, and the erosion itself is carried out in the most effective area nearby the well.

Claims (1)

The invention method for downhole hydraulic mining of minerals from the productive unit including opening the wellbore, washing it out with a jetting machine from the well in the direction of the bedding elements and pumping the pulp to the surface, characterized in that, in order to reduce costs for hydroproduction of minerals from a folded massif by reducing the cost of destruction of the massif by using its properties and rock pressure forces, before the erosion begins, the direction of folding around each well is determined, the erosion of the productive strata is carried out in three stages, while in the direction of falling from to .dock along the well, on the second The stages lay in the opposite direction until the formation of a natural equilibrium after the rock mass has collapsed, after which the base of the arch is eroded by a dip.