What are the recommended measures to ensure the safety of fully enclosed coal bunker construction op

1.There are three types of steel structure installation methods for fully enclosed coal bunkers: large-span movable fetal membrane scheme, jacking cumulative slip scheme, and hydraulic jacking scheme.

2.(1) Large-span movable fetal membrane scheme: According to the arc of the steel structure grid of the project, the large-span movable fetal membrane is designed, the fetal membrane is lower than the installed steel structure grid, leaving room for operation, and more than two slides are set at the lower part of the fetal membrane, and the fetal membrane realizes synchronous movement through slipping.

Wooden planks are laid on the fetal membrane to form an operating platform, and the installers work on the platform to complete the installation of the steel structure of the coal bunker in order. The construction process is safe and reliable, which can greatly save the construction period. (2) Jacking cumulative slip scheme:

First, a sliding support system of three slideways and six slide rails is erected, a high-altitude assembly platform is erected on one side of the main structure, a concrete trough beam is used as a side slideway, and a middle slideway is erected on the center line of the main structure to temporarily support the tire frame; assembling a steel truss assembly on the ground, and then hoisting to a high-altitude assembling platform assembling the first sliding unit; The first sliding unit is connected with the hydraulic synchronous multi-point pushing mechanism; After pushing the first sliding unit, assembling the second sliding unit again, and carrying out the second sliding after being connected with the first sliding unit; Assemble and slide n times like this. Not only is it safe and reliable, but it also shortens the construction period. (3) Hydraulic jacking scheme:

First assemble a certain area of grid on the ground, and then use a plurality of hydraulic jacking columns to synchronously jack it up, continue to assemble the grid, then continue to connect the jacking column, and then continue to assemble the grid until the jacking reaches a predetermined height, and then remove the jacking column. It is not only safe and reliable, but also reduces the project cost, shortens the construction period, and does not affect the construction of other structures.

I think it's safer to use a long-span removable membrane solution.

Legal Analysis:1In the process of work, the relevant personnel must strictly implement the "Electrical Safety Operation Regulations", and the inspectors will conduct the "three stresses and one implementation" on-site examination of the participating staff; 2.

The raw coal bunker clearance personnel should be familiar with this measure and strictly implement it; 3.Confirm that the plough corresponding to the cleared raw coal bunker is in the lifting position and that the power has been cut off. When the raw coal bunker at the end of the belt is cleared, in order to prevent the residual pulverized coal on the belt from falling, the two plows in front should be put down to intercept the residual coal.

It is also necessary to keep in touch with the chief of duty and withdraw personnel when the coal is loaded; 4.If the raw coal bunker is cleared, when the coal is blocked and the coal is opened, it should be dredged with the help of the auxiliary equipment of the raw coal bunker such as air cannon and rapping device, and this work must be operated by a special person, and the equipment shall not be operated at will by untrained personnel.

5.When using air cannons and rapping devices to dredge coal blockage, unified command should be given. The manhole cover on the upper part of the raw coal bunker should be closed to prevent the air cannon from collapsing the coal from the upper part, splashing down and injuring people and polluting the ground.

6.When the coal blockage of the raw coal bunker is serious and the blasting method must be used to clear the blockage, the attachment (attached) of the bench file line is required.

Legal basis: Work Safety Law of the People's Republic of China

Article 4 Production and business operation entities must comply with this Law and other laws and regulations related to production safety, strengthen the management of production safety, establish and improve the responsibility system for production safety and the rules and regulations for production safety, increase the investment in production safety funds, materials, technology and personnel, improve production safety conditions, strengthen the standardization and informatization of production safety, build a dual prevention mechanism for hierarchical control of safety risks and investigation and management of hidden dangers, improve the risk prevention and resolution mechanism, and improve the level of production safety. Ensure safe spike production.

Production and business operation units in emerging industries and fields such as the platform economy shall, on the basis of the characteristics of their respective industries and fields, establish, improve and implement a responsibility system for production safety for all employees, strengthen education and training on production safety for employees, and perform the relevant production safety obligations provided for in this Law and other laws and regulations.

Article 63 Where the departments responsible for the supervision and management of production safety shall, in accordance with the provisions of relevant laws and regulations, review and approve (including approval, approval, licensing, registration, certification, issuance of licenses, etc.) or acceptance of matters related to production safety that need to be reviewed and approved in strict accordance with the relevant laws, regulations, national standards or industry standards; Those who do not meet the safety production conditions stipulated in relevant laws, regulations, national standards or industry standards shall not be approved or accepted. Where units that have not obtained approval or passed acceptance in accordance with law engage in relevant activities without authorization, the department responsible for administrative examination and approval shall immediately ban them after discovering or receiving a report, and deal with them in accordance with law. For units that have already obtained approval in accordance with the law, the department responsible for administrative examination and approval shall revoke the original approval if it finds that it no longer meets the conditions for safe production.

Safety hazards of fully enclosed coal bunkers:

After the implementation of fully enclosed measures in the coal yard, the silo becomes a confined space, and the stacker and reclaimer will produce a large amount of coal dust pollution in the process of taking coal and stacking coal, and there is a risk of dust. In addition, coal will also volatilize toxic and harmful gases during storage, and spontaneous combustion will occur when the temperature is high, which will have serious consequences for the occupational health and safety of workers.

How can companies respond to security risks?

In addition to the reasonable design of the ventilation system of the coal bunker, the enterprise should also set up sprinkler or spraying equipment in the silo. This kind of 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 a small number of times, which can reduce potential safety hazards and save water. In addition, the spray or spray equipment should also be combined with the explosion-proof spontaneous combustion early warning system in the warehouse, once the concentration of dust, toxic and harmful gases exceeds the early warning value, it will automatically alarm, and at the same time start the spray or spray equipment, so as to ensure the safety of the coal bunker and operators.

To ensure the safe operation of the fully enclosed coal bunker, the following work needs to be done:

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.

For enterprises, if the fully enclosed transformation is carried out, there may be some more places that need to be paid attention to, such as the elimination of various hidden dangers in the warehouse, the safety performance, and the requirements of various environmental control will be greatly improved.

The so-called reduction of danger is just reduction, it can't be said that there is no danger at all, no one can guarantee that there is no danger, but in addition to ventilation, there must be no fire source in the room, and it is best not to have such a thing as sparks.

The ventilation transformation of the fully enclosed coal bunker can completely eliminate the pollution in the cabin.

In addition to the ventilation transformation of the fully enclosed coal bunker, there must be frequent sprinkling treatment on the coal bunker, which can well prevent the occurrence of spontaneous combustion of coal.

With the increasingly severe haze situation, air pollution prevention and control has become the new normal in the field of environmental protection. The open-pit coal yards of many enterprises have been upgraded to fully enclosed coal bunkers under the requirements of environmental protection. However, due to the fact that the coal bunker has become a confined space after the implementation, the ventilation conditions are poor, and there are major safety hazards.

For example, a large amount of dust will be generated in the process of coal falling, transportation, crushing, etc., and workers are prone to pneumoconiosis if inhaled for a long time. In addition, when these coal dust are suspended in the air and accumulate to a certain concentration, it is likely to cause dust accidents after encountering ignition, vibration or friction. In addition, coal is also prone to spontaneous combustion when it is piled up for a long time, and a large number of toxic and harmful gases and combustible gases will be produced.

Therefore, after the implementation of the full closure of the open-pit coal yard, the enterprise should install an explosion-proof spontaneous combustion monitoring and early warning system. This system uses infrared thermal imaging technology, like a "clairvoyant", which can carry out dynamic scanning and monitoring of the coal pile in all directions, and the specific data can realize the information transmission of the mobile phone client. Once the dust concentration and toxic and harmful gas concentration in the coal bunker exceed the early warning value, the system will automatically alarm and start the micro-mist dust suppression device in the bunker to ensure the safety of the coal bunker.

After the implementation of fully closed coal yards in many enterprises, they are unable to take into account the two aspects of ventilation and coal dust overflow. After the transformation of the fully enclosed coal bunker of some enterprises, the interior has become an airtight confined space, with high temperature, large dust concentration and poor working environment, which has brought many problems such as fire protection, safety, labor health, occupational health and safety.

When designing a fully enclosed coal bunker, the company did not have a ventilation system, and only unilaterally considered the environmental protection requirements, while ignoring the requirements of fire protection, occupational health and safety.

When implementing the fully enclosed transformation, enterprises can use the fully enclosed coal bunker ventilation design software and air curtain ventilation technology to ensure that the coal bunker ventilation is excellent and does not produce coal dust overflow, and completely eliminate fire protection, safety and occupational health and safety hazards.