Mine grounding system and construction method

Abstract

The invention discloses a mine grounding system and a construction method, and the method is not only suitable for an open-pit mine area, but also more suitable for the underground of a mine. In combination with a mining area mining section or underground roadway distribution condition, holes are drilled and washed in the relative center position near a mining area under the soil-free geological condition, conductive powder is injected into the holes through pressurization to permeate into rock mass through rock gaps, the rock mass and the ground form a large good electric conductor, and thenmetal type electric conductors are inserted into the holes and led out of the ground. A plurality of grounding bodies are connected with one another to form an efficient, good and reliable grounding body, and the grounding body is connected with an uncharged shell of electrical equipment through a grounding bus after forming a whole body so that the electrical equipment is protected; the system solves the problems that a grounding body cannot be installed on a mine working face due to no soil, potential safety hazards exist when grounding resistance exceeds the standard, and investment is large when a grounding grid needs to be laid for a long distance. The system has the characteristics of low installation cost, easy formation of reasonable layout in a mining area, simple, firm and reliable installation, and excellent grounding resistance value.

Description

technical field [0001] The invention relates to the field of mine operation electrical equipment, in particular to a mine grounding system and a construction method. Background technique [0002] In the power system, if the leakage occurs due to the insulation drop of the electrical equipment or the insulation breakdown, it will cause the part of the electrical equipment that should not be charged under normal conditions to be charged suddenly, or the part of the low voltage to become a high voltage suddenly. Major vicious accidents that cause personal electric shock casualties or burn electrical equipment. In order to prevent such accidents, relevant national departments stipulate that IT, TT or TN grounding methods should be adopted for electrical equipment to form effective protection. According to GB16423-2006 metal and non-metal mine safety regulations, GB50070-2009 mine power design code and other relevant national regulations, especially IT grounding method must be u...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a mine grounding system and construction method. This system is suitable for open-pit mines, especially the effect of installing the grounding system in underground mines is more obvious. It solves the problem of installing grounding systems in existing mines due to the lack of soil conditions The grounding body is difficult, the grounding resistance of the grounding body is difficult to meet the specification requirements, the installation cost is high, and there is a problem of electric shock hazard; it has the characteristics of low installation cost, reasonable layout, installation specifications, reliable power supply, excellent grounding resistance value, and eliminates leakage Safety risk of personal injury or damage to equipment

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