What are the measures to reduce the concentration of coal dust?

Commonly used dust removal methods are:

1) Ventilation and dust removal.

Ventilation and dust removal is widely used in coal mining enterprises, which uses fans to pump outside air to the mine to dilute the dust concentration, and then discharge the dust to the underground, and the dust concentration is further reduced. This method requires a high wind speed, which must not only be able to discharge the dust in the mine, but also avoid raising more dust and increasing the dust concentration. When the air is inlet through the fan, it is necessary to prevent a large amount of external dust from entering the mine, so that the quality of the air intake can be guaranteed, and the water curtain or dust net can be used to purify the air source.

The application of this method greatly reduces the dust concentration in the mine and reduces the probability of workers getting sick, but the underground dust reduced by ventilation is discharged to the surface through the fan, which may cause environmental pollution and affect the surface environment.

2) Coal seam water injection.

The method is to inject water holes in the coal seam, use water pressure to squeeze the water into the undeveloped coal mine, and the injected water expands into the void along the cracks, slowly penetrates into the coal mine, and wets the coal body in advance, which can not only reduce the occurrence of coal mine dust, but also effectively reduce the harmful gases in the air. The results show that when the water injection rate is equal to the water absorption rate of the coal body, the water injection effect is the best, and the water injection methods commonly used at present are divided into three types: short borehole water injection, long borehole water injection and deep borehole water injection.

This dust prevention method minimizes the concentration of mineral dust and is a highly effective dust prevention measure.

3) Wet dust removal reduces coal dust.

Normally, when the humidity in the air reaches 60%, the dust suspended in the air will be condensed, and it can settle when the gravity reaches a certain level. Partially suspended particles collide with each other under the impact of water mist and condense to form larger particles and fall, so that the dust concentration is reduced. This method is widely used in coal mine production, its operation is simple, the application of machinery is less, and the dust reduction effect is obvious, and it has significant effects in the process of mining, processing and transportation in coal mines.

Legal analysis: Establish a leading group for comprehensive dust prevention in mines, study and formulate dust control measures, implement plans and assessment methods, and implement dust prevention in comprehensive socks.

Strengthen the prevention and control of underground dust, regularly organize and inspect the progress of mine dust prevention and control, and ensure the dust concentration of all dust-producing sites.

When holding a regular meeting of "one pass and three preventions" every month, it is necessary to solve the problems existing in the dust control work and report the dust control situation in a timely manner. Combine.

It is necessary to establish and improve the comprehensive dust prevention management system of the mine, which must have:

Legal basis: "Regulations of the People's Republic of China on Coal Mine Safety Supervision" Article 1 In order to ensure the safety of coal mines, standardize the work of coal mine safety supervision, and protect the personal safety and health of coal mine workers, these regulations are formulated in accordance with the Coal Law, the Mine Safety Law, the Institutional Reform Plan adopted by the First Session of the Ninth National People's Congress and the decision on the Coal Mine Safety Supervision System.

Establish a leading group for comprehensive dust prevention in mines, study and formulate dust control measures, implementation plans and assessment methods, and implement comprehensive dust prevention together.

Strengthen the prevention and control of underground dust, regularly organize and inspect the progress of mine dust prevention and control, and ensure that the dust chain concentration of all dust-producing sites is known.

When holding a regular meeting of "one pass and three prevention" every month, it is necessary to solve the problem of lack of pick-up in dust control work, and report the dust control situation in a timely manner. Combine.

It is necessary to establish and improve the comprehensive dust prevention management system of the mine, which must have:

Legal basis: Article 1 of the Regulations of the People's Republic of China on Coal Mine Safety Supervision is formulated in accordance with the Coal Law, the Mine Safety Law, the Institutional Reform Plan adopted by the First Session of the Ninth National People's Congress and the decision on the Coal Mine Safety Supervision System in order to ensure the safety of coal mines, standardize the work of coal mine safety supervision, and protect the personal safety and health of coal mine workers.

Methods such as rapid coal seam water injection, automatic spraying of shearer hydraulic support, spraying of modified coal mining units, and increasing the diameter of water supply pipelines can be adopted, so as to reduce the coal dust concentration on the working face and improve the working environment.

Intelligent machine coal mining and cutting, without people, does not affect human health.

How to solve the problem of dust reduction inside the fully enclosed coal bunker.

I got it. First of all, the ventilation design of the coal bunker should be done before implementation;

secondly, set up spraying or spraying equipment in the coal bunker;

The above equipment uses an automatic control system, the range covers the coal pile and the operating range, and reduces the dust concentration in the silo by spraying or spraying, which not only reduces potential safety hazards but also saves water.

Finally, an explosion-proof spontaneous combustion system is installed in the coal bunker.

The spray or spray equipment is combined with the explosion-proof spontaneous combustion early warning system in the warehouse, and once the concentration of dust and toxic and harmful gases exceeds the warning value, it will automatically alarm, and the spraying or spraying equipment will be started at the same time, so as to ensure the safety of the coal bunker and operators.