CS230935B1 - A method of removing water from boreholes using an explosive - Google Patents

Abstract

The purpose of the invention is to remove quickly water from a flooded borehole before the workbench. What a flooded well depending on the amount of water is poured into the foaming agent in proportion 1% »to 1% and start at the bottom of the borehole at the height of the water column in the well explosive charge 0,1 kg and 1 kg whereupon the charge is fired.

Description

The invention relates to a process for removing water; boreholes using explosives, such as blasting boreholes.

So far, water has been removed from boreholes for blasting operations by blowing out with compressed air, where the hoses are introduced to the bottom of the borehole and the water column is forced out of the borehole by air pressure.

The disadvantage of this method is the relatively long handling times, and the need for an auxiliary machinery, eg an air compressor, a hose winding device. Another advantage is that the working space for the borehole charging is wetted.

It is also known to sow water from a flooded well. The disadvantages are similar to the previous method of removing water from wells.

Longer time the water is removed from boreholes using explosives. Depending on the amount of water in the borehole, an explosive charge weighing up to tens of kilograms is lowered to the bottom of the borehole. After the charge is fired, the water is swept from the borehole to the surface. The disadvantage of this method is that in boreholes with a higher water content, when using charges of greater weight, the borehole deforms and collapses.

These drawbacks are eliminated by the method of removing water from the boreholes by means of an explosive according to the invention, which is based on the fact that a frothing agent is poured into the flooded borehole in a proportion of 1% »to 1% and lowered into the borehole explosives weighing 0.1 kg to 1 kg, after which the charge is detonated.

The method of removing water from blasting boreholes according to the invention is comparatively economical compared to the methods used hitherto, since small explosive charges are used and no auxiliary equipment is required. Handling times are very short. The water from the boreholes did not soak the workspace for charging, but the flight! is in the form of foam into the surroundings.

Depending on the amount of water, a frothing agent in the ratio of 1 to 1% is not read into the flooded borehole for blasting operations and a charge of 0.1 kg to 1 kg is lowered to the bottom of the borehole. The explosion charge mass depends on the water column outlet in the borehole. When ignited, the frothing agent immediately mixes with the water in the well, i.e., foams the water and expels it from the well in the form of a light foam that is dispersed into the environment. Tlm is a borehole ready to charge, especially non-resistive explosives.

Example _c

0.2 liters of foaming agent was poured into the blasting borehole with a depth of 8 m and a volume of 100 l of water, and explosive cartridges weighing 0.2 kg were lowered to the borehole bottom. A plastic explosive was used. An electric detonator was used to ignite. After blasting the explosive charge in the borehole, the borehole was cleared of water and the water dispersed in the form of foam into the surroundings.

Claims (1)

A method of removing water from boreholes by means of an explosive, characterized by the fact that the method comprises:. a frothing agent is poured into the flooded borehole depending on the amount of water (J6 <, up to Y%) and a blasting agent weighing 0.1 kg to 1 kg is lowered to the borehole depending on the height of the water column in the borehole. detonate. ”»