Electric shock accidents in quarries and their prevention

( I ) Types of electrical accidents in mines

1 . Electrical Equipment and Line Accidents

This kind of accident mainly refers to short-circuit, overload, grounding, phase loss, leakage, insulation damage, oscillation, improper installation, lack of adjustment test accuracy or accuracy, maintenance and repair failure, design inaccuracy, lack of operating personnel experience, Destruction of natural conditions, human factors, etc. lead to explosions, fires, human casualties, damage to equipment and lines, and economic losses and social impacts caused by power outages caused by tripping of electrical equipment and lines.

2 . Electric current and electric shock accident

It refers to accidents caused by accidents caused by accidents caused by electric equipment and circuit accidents, or by workers or other personnel who violated operating procedures, safety precautions, and inadequate education and ineffective management.

3 . Electromagnetic injury accident

Is due to high frequency electromagnetic fields on the human body, people absorb radiation, causing loss of central nervous system disorders and functional damage to the cardiovascular system, while the impact of human emotions and fear of electromagnetic radiation caused panic fLl clutter caused by thread Operational injury accidents.

4 . Lightning accident

It refers to the destruction of buildings due to lightning strikes in the natural world, destruction of electrical equipment and lines and the lightning caused by it directly to humans and animals, injuries and explosions, and fire accidents.

5 . Electrostatic Injury

It refers to the explosions, fires, and electric shocks caused to people and equipment caused by electrostatic discharges due to friction, high speed, etc. during the production process.

6 . Explosion, fire accidents caused by electrical accidents in hazardous areas

Such accidents refer to the explosion of combustible gases and flammable and explosive materials, fires, and accompanying equipment damage and personal injury caused by dangerous temperatures of electrical equipment or discharge sparks, arcs, static electricity and other factors.

( II ) Main Reasons for Electric Shock in Mines

(1) Operators lack knowledge of safe electricity use and violate electrical safety operating procedures.

(2) The selection of power supply voltage, electrical equipment, etc. is inconsistent with the environmental conditions.

(3) Equipment with unsatisfactory safety performance was used.

(4) Improper use of equipment, overload operation.

(5) The installation of equipment and lines is unqualified, inspection is not fine, and maintenance is not good.

( III ) Cases of electric shock accidents

2006 June 16, Hubei Huangshi City limestone, maintenance electrician Liu stope 6600 v high voltage electrical lines, when the original N 30 points complete overhaul, after the change due to the actual workload, can not be completed on time, Liu continued to overhaul food overhaul to 1530 when, substation maintenance think the line has been completed, mistakenly sent electricity, resulting in Ryu is maintenance of electric shock, after she died.

After the accident, investigation and analysis by the accident investigation team concluded that the main causes of the accident were the following:

(1) Liu did not contact the substation in time.

(2) The substation blindly transmits electricity.

(3) The mine is poorly managed.

( IV ) Measures to prevent electric shock accidents

(1) Strengthen safety education. Education electricians must strictly implement electrical safety regulations.

(2) Safety measures must be made during electrical overhaul.

(3) To repair electrical equipment and lines, a prominent safety sign must be suspended.

(4) Before repairing the line, it must be inspected, discharged, and installed.

(5) In the maintenance of electrical, one person must be operated to monitor one person.

(6) When overhauling electrical equipment or lines at night, the inspection site should have good lighting.

(7) It is forbidden to overload the electrical equipment.

(8) Live work is prohibited when servicing electrical equipment and lines.

The information in this article comes from the Internet and was reorganized and edited by China Rescue Equipment Network.