Gas Accident Hazard and Emergency Disposal Plan

1.1 Gas Accident Damage Degree and Range Prediction

(1) Gas asphyxiation accident

The gas identification results over the years show that our mine is a low gas mine. In 2007 the mine gas emission relative amount of 1.6m ³ / t, the absolute amount of emission 0.48m ³ / min, the amount of carbon dioxide emission relative to 2.07m ³ / t, the absolute amount of emission 0.62m ³ / min. If the ventilation system is reasonable, the facilities are well-prepared, and the air volume meets the requirements, no gas accidents will occur. If there is no plan to stop the wind or the wind volume is insufficient, measures may not be taken when the ventilation system is in place and personnel gas suffocation accidents are likely to occur.

(2) Gas explosion accident

The concentration of gas in the air reaches the explosion limit, and it has a fire source and oxygen supply conditions. A gas explosion accident will occur and pose a great threat to people and property. The high temperature, high pressure and large amounts of toxic gases such as carbon monoxide and carbon dioxide caused by explosion will cause A large number of casualties occurred. The blast wave generated by the explosion caused serious damage to the roadway, support and equipment, causing tension in production. When coal dust accumulates, it may cause explosion of coal dust, further expand the scope of disasters and endanger the entire mine.

1.2 Analysis of Major Gas Accidents and Damages that May Occur in Mines

(1) Our mine is a low-gas mine. In the case that the ventilation system is reasonable, the facilities are complete and the air volume meets the requirements, no gas explosion will occur. However, in the coal roadway and semi-coal rock roadway excavation, gas accumulation and overrun may occur in old air, blind lanes, roadway high-risen areas, pick-up angles on the mining surface, and low wind speed lanes. Causes a choking accident.

(2) In the roadway where the ventilation distance is longer in the driving face, due to the increase of air leakage due to multiple joints of the air duct, there is insufficient ventilation resistance to cause insufficient air flow, and the concentration of gas cannot be effectively diluted so that the concentration of gas reaches within the explosion range. The presence of high-temperature heat sources such as flames, electrical equipment, and explosions can cause gas explosions.

(3) If the amount of air at the working face is too small, the column at the upper corner may not be timely or affected by harmful gas from the working face of the previous section, and it may cause gas accumulation to cause an accident ; if the coal road is pulled back, due to serious deformation of the roadway, In order to facilitate the retracement, reducing the section of the air duct and causing insufficient air volume at the evacuation site may lead to gas accumulation and accidents.

(4) When the roadway is penetrated, due to imperfect ventilation facilities, a short-circuit is caused by wind flow, which affects the normal supply of wind and gas accumulation on the working face.

(5) When the gas is discharged, due to the implementation of measures, the electrical equipment in the return air flow is not cut off or there is a high-temperature fire source, and the high gas discharged will encounter an explosion after it encounters the detonation source.

(6) Gas accumulation due to the accumulation of high-concentration gas gas due to failure to implement good measures during stoppage of ventilation on the driving face of the tunnel and explosion of the gas source

(7) Gas gushing anomalies will occur in complex geologic structures. If a large amount of gush occurs, a gas explosion will occur when the source of detonation is encountered.

2. Principles of Emergency Disposal

2.1 Accident Reporting Principles

After the accident, it should immediately report to the mine dispatching office.

2.2 Unified Command Principle

Mines set up a unified command of the disaster relief headquarters, fully mobilized rescue forces in all areas, implemented responsibilities, organized scientifically, and ensured that the rescue work was carried out quickly and orderly.

2.3 The principle of saving people

Adhere to the "people-oriented" principle, effectively take the life safety of employees as the primary task of accident management, effectively prevent and control the spread of accidental hazards, and do everything possible to minimize the damage and damage caused by accidents.

2.4 The principle of timely rescue

(1) After the accident, field personnel should take effective measures to carry out self-rescue and mutual rescue work.

(2) After the accident, the main person in charge of the mine should quickly organize rescue in accordance with relevant regulations.

(3) The implementation of rapid emergency response and rapid rescue, organization of relevant units, aid agencies must first arrive at the place where the accident occurred, the response rescue equipment must also quickly arrive.

2.5 Classified Disposal Principles

According to the level of accidents, the implementation of graded disposal.

2.6 Proper handling of the principle of recovery

In accordance with the relevant provisions, in the accident rescue and rescue, it is necessary to carry out the aftermath processing as soon as possible, according to the relevant policies and regulations, combined with the actual situation, to adopt "one to one" household security appease and other measures to actively and properly deal with the aftermath, effective maintenance social stability.

3. Organization and responsibilities

3.1 Establishment of Accident Handling Headquarters

The Disaster Relief Headquarters is located in the mine control room and is responsible for unified command and coordination of emergency rescue work for production safety accidents.

General Command of Command: Mine Chief and Party Secretary

Deputy Commander: Deputy General Manager of Operations, Chairman of Labor Union, Deputy Party Secretary, Chief of Production, Chief Engineer, Safety Officer

Members: Chief of Electrical and Mechanical Mines, Minister of Safety Supervision, Chief of Ventilation Area, Director of Control Room, Technical Section Chief, Chief of Electrical and Mechanical Department, Chief of Ventilation Section.

Gas accident emergency plan

There are nine working groups under the mine accident relief headquarters, which are responsible for organizing and directing on-site rescue and disaster relief work.

(1) On-site command group

Leader: Production Manager

Members: Dispatch room director, rescue team-related personnel

main duty:

1 Responsible for commanding on-site rescue and rescue teams.

2 Organizations deploy rescue personnel and supplies.

3 Assist the commander in the research and development of the accident handling plan.

(2) Emergency rescue team

Leader: Safety Mine Officer

Members: Chief of the mining area, chief of the safety supervision section, rescue team, technical section chief, and district chief of the ventilation section.

main duty:

1 Conduct command and rescue work on the site, and implement the rescue and disaster relief technical plan and safety technical measures formulated by the headquarters.

2 Rapidly formulate action plans and safety technical measures for mine rescue teams.

3 Organize and direct on-site disaster relief, relief supplies and wounded transfer.

4 Rationally organize and mobilize combat forces to ensure the completion of the ambulance mission.

(3) Technical Expert Group

Leader: Chief Engineer

Members: Mayor of ventilation work area, technical section chief.

main duty:

1 According to the nature of the accident, category, scope of impact, and other basic conditions, the emergency rescue and relief plan and technical measures shall be formulated promptly, and shall be implemented after the general commander agrees.

2 Develop and implement safety precautions to prevent accidents from expanding.

3 to solve the technical problems in the accident rescue process.

4 Validate the analysis report of the cause of the accident and report it to the general commander for approval.

(4) Material Support Group

Team Leader: Vice President of Supply and Marketing

Member: Supply and Marketing Section

main duty:

1 Responsible for timely supply of materials and equipment in disaster relief.

2 Raise, mobilize emergency rescue air supply, power supply, and water supply and drainage equipment.

3 Undertake other tasks assigned by the command headquarters.

(5) Security Team:

Leader: Chief of Security

Members: All security staff.

main duty:

1 Organize public security personnel to guard against the scene of the accident, martial law and maintain order, and maintain security and traffic order in the area where the accident occurred.

2 Direct the evacuation of personnel in the area affected by the accident.

3 Complete other tasks assigned by the headquarters

(6) Medical Care Team

Leader: Party Secretary

Members: Director of the Dispatch Room, Director of the Party and Government Office, and Mayor of the Transport Division

main duty:

1 Immediately rushed to the scene to rescue the injured.

2 Organization of medical treatment, responsible for the formulation of medical rescue programs.

3Responsible for proposing plans and measures for temporary treatment and medical treatment of the wounded ;

4 Responsible for transporting injured personnel from underground to the ground.

(7) Information release group

Responsible person: Deputy Party Secretary

Members: Party and government offices and other relevant personnel.

main duty:

1 Responsible for the release of accident information, it is necessary to inform the society of the nature of the accident and the progress of the rescue in accordance with the accident rescue information provided by the headquarters.

2 Report on-site rescue work to major news media such as government agencies, newspapers, radio stations and television stations.

3 correctly lead to media and public opinion.

(8) Logistic Support Group

Leader: Union chairman

Members: material supply department, dispatching room, dispatching room communication group, upper and lower working areas.

main duty:

1 Responsible for organizing the protection plan.

2 Responsible for food and accommodation reception, vehicle dispatch, power supply and communication.

(9) Aftercare team:

Leader: Party Secretary

Members: Heads of departments such as labor unions, party and government offices, and labor and personnel departments.

main duty:

1 Responsible for the disposal of remains and relics of persons killed in accidents.

2 Responsible for the appeasement of the relatives of the casualties and accidental treatment of the pensions.

3.3 Departmental responsibilities

(1) Control Room

Adhere to 24- hour emergency

1 Accurately report the accident situation in a timely manner and convey the command of the general commander.

2 Call the relevant personnel to prepare for the standby and responding in the dispatch room.

3 Understand and record the time and place of the accident, disaster situation and current

Field rescue measures.

4 Verify and count the number of people in the disaster area, and follow the command of the headquarters to inform the personnel in the disaster area to evacuate.

5 To arrange rescue rescue orders, it is necessary to make a detailed record of emergency response and to keep abreast of the progress of the accident rescue scene and the rescue situation.

6 In accordance with the requirements of the headquarters, fully coordinate and guide the accident emergency rescue work and call emergency relief supplies, rescue teams, equipment and related experts.

7 According to the command of the headquarters, report the incident to the relevant authorities at the higher level within a specified time.

8 Responsible for drafting accident emergency rescue work report.

9 Complete other tasks given by the commander.

(2) Party and government office

Adhere to 24- hour emergency duty.

1 Report the accident information to the general commander in a timely manner, and communicate the instructions and opinions of the commander on the rescue work.

2 Accept important instructions and instructions from the leaders of higher authorities, report them to the general commander immediately, and supervise the implementation.

3 Vehicles needed to ensure accident rescue.

4 Undertake other tasks assigned by the command headquarters.

(3) Safety Supervision Department

Adhere to 24- hour emergency duty.

1 Report the accident information to the headquarters in a timely manner.

2 In accordance with instructions from the general commander, organize relevant personnel such as trade unions to conduct accident investigations and provide the headquarters with an accident investigation report in a timely manner.

3 Participate in accident investigations at higher levels and provide accident investigation teams with information on accidents. Important matters must be referred to the commander.

4 Responsible for supervising the implementation of on-site safety measures.

5 Complete other tasks assigned by the command.

(4) Medical rescue team.

Adhere to 24- hour emergency duty.

1 Do a good job of emergency rescue and rescue work. After receiving the alert, set up an on-site medical treatment team and send a rescue team within 3 minutes.

2 Mobilize emergency rescue and emergency medicines, etc., and provide timely rescue items.

3 Complete other tasks assigned by the command.

(5) Material Supply Department

Adhere to 24- hour emergency duty. Ensure the supply of accident rescue materials and ensure the smooth development of rescue and relief work.

(6) Technology Section, Transport Area, Ventilation Area

1 Provide disaster area drawings and related technical data.

2 According to the command of the headquarters to complete the relevant site detection and measurement work.

3 According to the actual situation, formulate corresponding technical solutions and preventive measures.

4 Responsible for drafting the cause analysis report.

5 Complete other tasks given by the commander.

(7) Distribution Group

1 Responsible for ensuring the smooth operation of the external network and internal network of the headquarters to ensure timely release of accident information and rescue progress through the Internet.

2 Provide technical support to assist in handling and resolving the technical difficulties encountered in the communication facilities on site.

(8) Party and Government Office

1 According to the command of the headquarters, it is responsible for arranging the accident scene shooting and interviewing.

2 Responsible for timely delivery of meteorological data to the headquarters.

3 Undertake other tasks assigned by the Party and the government office of the headquarters.

(9) Finance Department

The funds needed to provide rescue equipment and equipment for accident rescue and equipment support and the aftermath of accidents are in place.

(10) Trade unions

Participate in accident investigations and deal with the aftermath.

(11) Others

Relevant departments completed other tasks assigned by the headquarters.

4. Prevention and early warning

4.1 Hazard Monitoring

4.1.1 Ways of Monitoring Hazardous Gas Sources

(1) Our mine installs the KJ160N type safety monitoring system. The system consists of the main station master and backup machines, transmission interfaces, sound and light alarms, substations, transmission lines, and sensors.

It is composed of local and remote gas sound and light alarms and power-off functions. It can automatically diagnose system transmission conditions, sensors, substations and other monitoring faults, store monitoring data and historical curves, and can output print monitoring reports.

At present, all coal mining face, coal half-coal boring face, and series ventilation site in our mine have installed gas sensors according to the safety monitoring AQ1029-2007 industry standard, and can continuously monitor the gas concentration in the work flow. Dynamic data can be displayed in real time, and gas changes can be analyzed based on historical curves.

(2) All fans of local fans shall be set up to open and shut down, normal monitoring of the fan's operation shall be conducted, and the occurrence of unplanned stoppage of the driving face shall be prevented.

(3) According to the continuous change of mine production, the monthly gas set-up plan will be compiled. The ventilation work area will be divided into three or eight systems according to the plan to check the gas and other harmful gas conditions at each site, and the gas inspection and increase/decrease point will be reported to the chief engineer in time. Approval.

(4) Each mine working face hangs a gas alarm instrument in accordance with the regulations. The district team manager, the team leader, and the blaster are equipped with a gas alarm meter to timely monitor the gas change situation at the construction site.

4.1.2 Take measures

The key to preventing gas accidents is to strengthen ventilation management, prevent gas accumulation, and eliminate ignition sources.

(1) Do a good job in mine development and layout, rational arrangement of roadway, no plane intersection roadway, eliminate unreasonable series ventilation, old pond ventilation, and establish a reasonable and reliable ventilation system.

(2) According to the production connection, a ventilation operation plan and a gas inspection point setting plan shall be prepared monthly to timely adjust the ventilation system, eliminate unreasonable serial ventilation, ventilation of old ponds, and diffusion ventilation, eliminate windless areas and breezes, and ensure each use The amount of wind and wind speed at the wind site meet the requirements of the regulations.

(3) Strengthen local ventilation management, especially local ventilation management in key gas management areas.

1 Mining and digging power must be separated.

2Drilling work surface must be installed with double fans and dual power supply, and can be switched automatically. Once every shift is tested, wind power lockout device, artificial power restoration, fan in coal lane, half coal lane and long-distance ventilation place must be installed. .

3 The fan must ensure normal operation and it is forbidden to stop the fan at will.

4 Temporary shutdown site must not stop the wind, there must be someone to look after the fan, it is forbidden to stop the fan at will. If you need to stop the fan operation, you must fill out the “planned stoppage report” to report to the chief engineer of the mine, the ventilation department and related departments for approval. Stop the work and cut off the power supply. Withdraw the personnel. There must be no cannon left in the construction site. Set a fence at the all-air pressure roadway entrance and it is forbidden for personnel to enter.

5 When there is a plan to stop the wind, safety measures must be prepared according to the site conditions, specify the time of power outage, stoppage time, reasons, preparation before stopping the wind, safety during the wind stoppage, steps to restore ventilation, etc., and clarify the responsible person to ensure implementation.

6 When there is no plan to stop the wind, the team leader must immediately order to stop the work and withdraw the personnel, cut off the power supply, and report the dispatching room in time. If the part-time driver cannot recover the ventilation within 10 minutes, the team leader shall be at the all-air pressure laneway. Set up a fence, cut off the air duct, arrange for someone to look after the fan, and prohibit the fan and personnel from starting the wind park randomly.

7 The construction unit using the local ventilator must establish the safety measures for the unscheduled stoppage of the local ventilator and incorporate it into the construction operation procedures.

(4) Strict gas management to prevent gas accidents.

1 The management of strict gas inspectors must be equipped with full-time tile inspectors for the mining face in key gas management areas.

2 Strict gas inspection system, inspection of gas according to regulations, elimination of missed inspections for empty shifts, fraud, and falsification of data, gas inspections to achieve "three pairs of mouth."

3 Portable gas alarms must be worn when the sub-departmental-level managers, blasters, captains of the excavation area, the leader of the defensive zone, engineering technicians, team leader, coal driver, safety monitor, and mobile electric fitter go down.

4 The mining face must be equipped with a portable gas alarm, suspended according to regulations and in a normally open state. A sensitive and reliable gas sensor must be installed on the working face of coal mining face, coal roadway and half coal roadway. The break point range meets the requirements. Wind speed sensors are installed in the return air of mines and mining areas, and the main and auxiliary fans of the excavation work surface are installed and stopped. Quantity, the main air intake damper installed switch. All kinds of sensors should be maintained and calibrated in time to ensure sensitive and reliable.

5 When the concentration of gas or carbon dioxide in the total return air duct or return air flow of the mine exceeds 0.75% , the chief engineer of the mine must be reported to find out the reason for handling. Must stop mining area mining face return air duct and the return air duct air flow in the gas concentration exceeds 1%, or more than 1.5% carbon dioxide operations, withdrawal of staff, chief engineer in charge of the mine to take measures to deal with; Merry Excavation Face When the gas concentration exceeds 1% , it must be stopped by drilling with an electric drill. Shooting is prohibited when the concentration of gas in the airflow within 20 meters of the blasting site reaches 1% .

6 The working face of stopping the wind firstly inspected the gas before restoration of ventilation, stopped the wind in the key face of the gas key area for more than 2 hours, the non-gas key area exceeded 8 hours, and was rehabilitated by the rescue team during the restoration of ventilation, and was inspected by the full-time gas within the specified time. Conducting exploration, only the oxygen concentration in the stop zone is not less than 18% , the maximum gas concentration does not exceed 1% , the maximum carbon dioxide concentration does not exceed 1.5% , and the gas concentration in the airflow within 10 meters of the local fan and its switch is not When more than 0.5% can be directly restored to ventilation, otherwise measures must be written to discharge the gas from the rescue team under the command of the chief engineer.

7 It is imperative to restore the closed stoppage area or working surface close to these locations.

Discharge the gas accumulated in the gas and discharge the gas. Before the gas is discharged, safety measures shall be formulated. The gas shall be discharged by the rescue team under the command of the chief engineer of the mine.

8 When the blind alley or old lane is unsealed, the rescue team must explore the lane. When the gas in the lane does not exceed 1% and the carbon dioxide does not exceed 1.5% , the ventilation department can directly restore ventilation. Otherwise, measures must be written under the command of the chief engineer. The discharge of gas is performed by the ambulance team.

9 The gas inspector discovered that when the gas exceeds the limit or the gas is abnormal, the construction unit must immediately notify the construction unit to stop the operation, withdraw the personnel, and immediately report to the dispatching room and the ventilation work area public room, and report to the chief engineer to take measures to deal with it. After filling the well, he fills in the gas limit ( abnormality). ) Report form.

⑩ When the head before heading to thoroughly blind alley, the old lane roadway or other geological department must place before tunneling through from 50m in mechanized working face, the other heading face away from the site through 20m, from the pitch to open the door through points less than fully mechanized excavation Before 50m and others are less than 20m before the door is opened, the surveying department must report to the chief engineer of the mine and issue a “pre-transmission notice”. After the ventilation department receives the “pre-transmission notice”, it prepares safety measures for roadway penetration and prepares the ventilation system. Only when the concentration of carbon dioxide in the roadway that has been penetrated is less than 1% and the concentration of carbon dioxide is 1.5% or less, it can be penetrated. Otherwise, gas must be discharged according to regulations.

(5) Strengthen blasting management

1 The blasting must strictly implement the "one shot three inspections", "three shots of insurance" and "three interlocks" system.

2 The working face of each coal seam must use coal mine permitted explosives and coal mine permitted detonators that have obtained product licenses. The delay time of the last segment when using a millisecond delay detonator must not exceed 130 milliseconds.

3 The naked blasting is strictly forbidden, and the shotgun can not be shot with shallow eyes and the short busbars can be shot.

4 In the driving face, one charge must be detonated all at once, and sub-assembly drugs can be used in the recovery work. However, an assembly drug must be detonated at one time to eliminate the phenomenon of one-time firing and repeated detonation. It is strictly forbidden to use two or more shotguns at a mining face to shoot at the same time.

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