SU1421875A1 - Method of airing a chamber of potassium mine - Google Patents

Abstract

The invention relates to the mining industry and m, b, used in the development of ore mineral deposits. making development. Fresh air is fed into the chamber through the air duct and the polluted air is vented through the air duct. After the explosion, the enclosure is lowered into the bottom hole of the chamber, which ensures the elimination of hazardous propagation throughout the chamber volume. Fresh air is supplied to the enclosed space through a channel having the same cross section with air supply. The input end of the channel is connected to the generation, and its output and the end is placed behind the railing on the ram. standing from the bottom, determined from the ma- / / L thematic expression. In this case, cooling and turbulization of the gas-air mixture is carried out in a confined, space. 3 il.

Description

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The invention relates to the mining industry and can be used for ventilation of chambers after blasting operations when developing mainly ore deposits of minerals by chamber mining systems. The purpose of the invention is to increase the efficiency of airing due to the tensioning of the removal of harmful gases, the formation after blasting, from the bottomhole zone and the reduction of the concentration of harmful gases in the air exhaust,

FIG. 1 is a schematic diagram illustrating an implementation of a method for ventilating a potash chamber; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. 2,

In the ceiling of chamber 1 at a distance from the bottom. 1c IK Um, a well 2 was drilled, into which a perforated pipe 3 was placed, through which part of the fresh air by the local ventilation fan 4 is fed into chamber 5,

After the explosion, the fence in the form of a sail 6 is lowered at a distance from the bottom equal to 1j Ij + 5, m, which ensures the elimination of harmful substances throughout the chamber 5. Through the collector 7, having the same section with the air supplying outlet 8 and connected to the inlet end 9 with it, serves the main part of the air that provides an increase in the intensity of removal of poisonous gases,

The output end 10 of the collector is placed behind the sail at a distance of 11

k -VA

one

S

lu4 - s--,

s

where 1. is the distance from the end of the frame

before slaughter, m;

k is the coefficient taking into account the type and design of the charge of explosive explosives, k 3 -105;

And - quantity at the same time

explosive explosive, kg;

p is the density of the explosive rock mass, kg / m;

1 - the length of the explosion after the explosion, m;

Q 5

0

five

g Q

five

five

-.

S is the cross-sectional area

cameras, m; d is the diameter of the charge in the hole, m.

Due to the local ventilation fan 12 and air coolers 13, additional turbulization and cooling of the gas-air mixture is created, which provides an increase in the absorption of harmful substances in the bottom hole zone and a decrease in their concentration in the outgoing jet 14,

Claims (1)

Invention Formula The method of ventilation of the potash mine chamber, which includes the supply of fresh air to the chamber through the air supply and the discharge of contaminated air by the air discharge, which is due to the fact that, in order to increase the ventilation efficiency due to the intensification of the removal of harmful gases formed after the explosion, , from the near-wellbore zone and reducing the concentration of harmful gases in the air vent, after frustration, in the near-wellbore space of the chamber, a barrier is installed and fed to the enclosed bottomhole space into fresh air, through a channel having the same cross section with an air outlet, the input end of which is connected to it, and the output end is placed behind the fence at a distance from the bottom determined from the mathematical expression  k / a. to - VP 1 Ih d where 1 k is the distance from the end of frame i to the bottom, m; k is the coefficient taking into account the type and design of the charge of explosive explosives; And - quantity at the same time exploded WB, kg; p is the density of the exploded mountain mass, kg / m; 1 - Dpina movement after the explosion, m; - S - cross-sectional area chambers, d - charge diameter in the hole (well), m, cooling and. turbulence of the gas-air mixture in 3anepeNn r4eHHOM space.