SU754047A1 - Mineral mining method - Google Patents

Description

(54) METHOD FOR CONSUMPTION OF MINERAL RESOURCES

I

The invention relates to the field of mining and can be used in the development of mineral deposits, such as sulfur, viscous oil, bitumen, ozokerite, mercury, etc. through wells using underground smelting.

There is a method of developing deep sulfur deposits through wells, which use water supplied to the reservoir and heated by an electric heater located in well 1 as a heat carrier in the smelting of sulfur.

The disadvantage of this method is the limited scope of its application, since it is applicable only for mining permeable and watered sulfur deposits and is unsuitable for impermeable and dry.

There is a method of mining minerals, such as sulfur, which includes opening the mineral deposit in the well, transferring the mineral to a mobile state by introducing eletric energy into the deposit and its release through the well to the surface 2.

The disadvantage of this method is high power consumption.

The aim of the invention is to eliminate this drawback.

This goal is achieved by the fact that the power of electric energy is changed during the extraction process from a value sufficient to transfer the mineral to a mobile state in the near-well zone of the deposit to a value sufficient to transfer the mineral to a mobile state at the boundary of the developed section of the deposit.

In this case, the current value of the amount of power introduced into the deposit of electric energy is based on the dependence

. - &, S9-E

W W,

tlh

where w

- the current value of the amount of power introduced into the deposit of electrical energy, kW;

W

t, - „- is the value of the amount of power sufficient to transfer the mineral to a mobile state at the border of the developed section of the deposit;

Claims (2)

t - the current time of development of the reservoir. The drawing shows a vertical section of the deposit being developed and a large-scale plot of the current value of electric power (W) versus deposit development (t) combined with it. The method is carried out as follows: Mineral deposits 1 are opened by production wells 2, electrodes 3 are placed in them and electrical energy is introduced into reservoir 1 from source 4 of direct or alternating current (50 Hz, high frequency or microwave). Due to the release of power in the deposit, it is heated. When the phase transition temperature (transition to the mobile state) is reached, a phase transition zone 5 is formed, which moves along the deposit following the movement of the isotherm 6, corresponding to the phase transition temperature. In this case, each time point t will correspond to a certain position of the phase transition zone. The criterion determining the amount of power introduced into the reservoir is the energy density at the boundary 7 of the phase transition zone, sufficient to heat the reservoir to the phase transition temperature, compensate for the heat of phase transition and heat loss due to thermal conductivity of the reservoir and convective heat transfer by the reservoir water. Optimal when extracting minerals is a mode in which the quantity of minerals moving from the phase transition zone to the discharge zone is equal to the amount extracted from the newly heated volume. This mode is provided with equal speed of the mineral in the mobile phase from the phase transition zone towards the mineral extraction zone from the deposit (V) and the velocity of the phase transition zone (Vt). This mode is achieved by changing the current value of the power of electricity (Wi, Wg, W3 ...) in time (t ,, t2 3 ..-) from a value sufficient to transfer the mineral to a mobile state in the near-wellbore zone of the deposit to sufficient to transfer the mineral to a mobile state at the boundary of the developed section of the deposit. The current value of the power input to the electrical energy deposit is determined on the basis of the dependence, -5 9-e- "WW. At the same time, the magnitude of the power value sufficient to transfer the mineral to a mobile state at the deposit boundary of the determined plot is derived from WP ,, , + к + (l-ij), where WQ is the power, calculated from the results of the thermodynamic problem and determined at the end of the heating process; k - loss factor. power in the roof and soil deposits; IT, - System efficiency - current-line source -seat. The mineral produced by this method is pumped to the surface through wells using any of the known methods. The application of the method will allow to minimize the irrational loss of electric energy, which will increase the efficiency of the process of mining mineral deposits using the method of underground smelting through wells. Claim 1. A method of extracting minerals, such as sulfur, including opening a mineral deposit by wells, transferring the mineral to a mobile state by introducing electrical energy into the deposit and releasing it to the surface, characterized in that, in order to reduce electrical energy consumption, the power of the latter is changed in the process of mining from a value sufficient to transfer the mineral to mobile state in the near-well zone of the deposit to a value sufficient to convert the useful mineral digging into a mobile state at the boundary of the developed section. 2. A method according to claim 1, characterized in that the current value of the amount of power introduced into the electrical energy deposit is taken based on the relationship W W where W is the current value of the amount of power applied to the deposit electrical energy, kW; Wmym is the value of the amount of power sufficient to transfer the mineral to the mobile state at the boundary of the developed section of the deposit; t - the current time of development of the reservoir. Sources of information taken into account in the examination 1.PPP No. 39806, cl. 5c 42/10, 1955. 2. USSR author's certificate number 250833, cl. E 21 B 43/28, 1967 (prototype).