Safety technical measures for ventilation and harm

Safety technical measures for ventilation and harmful gas prevention and control in the heading face

because the 21052 upper auxiliary roadway heading face is constructed in the goaf of the original 21051 face and is excavated along the edge of the goaf of 21031 face, and there are abandoned roadways of the original small shaft crossing the boundary within the excavation range, which has a certain impact on the use and design of high-voltage high-power insulated gate bipolar transistor (IGBT) module for the safe excavation of 21052 face, In order to ensure the safe excavation of 21052 upper roadway heading face and prevent air leakage and harmful gas injury accidents, the following safety technical measures are specially formulated, which must be carefully implemented and strictly implemented by relevant units

first, the information center is responsible for installing one at the 21052 upper auxiliary roadway heading face and its fan within 30 meters, and strengthening and line maintenance. In the future, the rock roadway team is responsible for moving the working face inward with the tunneling to ensure smooth communication

II. The excavation department, ventilation Department, geological survey department, safety department and other departments often send people to inspect the potential safety hazards of the 21052 upper auxiliary roadway excavation face, so as to find and deal with them as early as possible, eliminate the potential hazards in time, and achieve safe production

III. The chief of the geological survey section is responsible for the following work:

1. Be responsible for strengthening the investigation of the mining activities of small kilns around the 21052 working face to prevent cross-border mining, and immediately report to the mine and coordinate the handling if cross-border mining is found

2. Timely and accurately predict the location of abandoned tunnels in small shafts, and timely report the prediction to the ventilation Department, safety and quality department, rock tunnel team and other units, so as to take corresponding treatment measures

3. If there is air leakage in the small shaft at the heading face of 21052 upper auxiliary roadway, the geological survey department shall immediately send personnel to supervise and deal with the nearby small shaft to ensure the safe production of our mine

IV. the ventilation team leader is responsible for the following work:

1. Maintain all ventilation facilities in mining area 21, especially strengthen the control of air leakage through the wall chute hole of the air door of 21031 second auxiliary lane, so as to ensure the stability and reliability of the ventilation system

2. Prepare a sufficient number of wood and other materials at the 21052 upper auxiliary roadway heading face for the use of air leakage construction dampers (arranged by the ventilation department according to the actual situation)

3. Strengthen local ventilation management. Send special personnel to check the fan operation and collapse condition of 21052 upper roadway heading face every day and report to the ventilation Department; Maintain the air duct of 21052 upper auxiliary roadway heading face to ensure local ventilation to achieve dynamic standard

4. Install various dust-proof fire-proof and explosion-proof facilities in time as required to ensure the perfection and normal use of dust-proof fire-proof and explosion-proof facilities in the roadway of 21052 working face

5. Provide 21052 Shangfu roadway workers with portable gas meters and pressure testing machines, also known as electronic pressure testing machines and optical tile detectors, with good performance, so as to accurately understand the gas situation in the workplace

v. the head of the tunneling section is responsible for the following work:

1. 21052 upper auxiliary roadway is tunneling in the goaf or tunneling through the goaf. In case of air leakage or toxic and harmful gas, when it is still unable to be controlled by taking measures such as wind control, the construction unit should be organized in time to take measures such as shotcreting to deal with the section with air leakage or toxic and harmful gas, so as to prevent spontaneous combustion of coal seams or toxic and harmful gas accidents due to air leakage

2. Supervise the rock roadway team to strictly manage the engineering quality of 21052 upper auxiliary roadway heading face, strictly prevent slope breaking and roof falling, and ensure construction safety

VI. the leader of the rock roadway team is the first person in the safe production of the 21052 upper auxiliary roadway heading face, and is fully responsible for the safety work of the 21052 upper auxiliary roadway heading face. It is necessary to strictly implement the safety measures issued by various departments, strengthen staff training, strengthen the rectification and treatment of hidden dangers, and ensure safe production. At the same time, the following work should be done well:

1. The construction team must formulate strict construction measures for tunneling in the goaf and passing through the old lane before the 21052 upper auxiliary lane is excavated into the goaf or the old lane, and construct in strict accordance with the measures

2, 21052 the principle of "if there is doubt, explore first and then dig" must be strictly adhered to in the process of tunneling. All exploration and drawing measures issued by the mine must be strictly implemented, and the short-term exploration and long-term exploration system must be adhered to. The measures of "exploring eight into three" must be strictly implemented, and it is strictly forbidden to drive beyond the safe distance

3. If there is co gas or a large amount of air leakage or the gas concentration is greater than 1% in the probe hole, it must be immediately sealed by the attendant supervision and rescue team and reported to the control room, safety department and ventilation Department; If CO gas appears in the airflow of the roadway, the shift leader and the monitor must obey the command of the shift supervisor and ambulance team member

4. A certain amount of cotton yarn (not less than 2 kg) and yellow mud (not less than 2 bags) are prepared at the end of the 21052 upper auxiliary roadway heading face. The yellow mud is kneaded into a ball by hand as the standard, in case of CO gas or air leakage in the exploratory hole and other holes, the rescue team can seal the hole

5. In the process of tunneling, the gas and co sensors at the pit head should be moved in time and hung according to the regulations to ensure the normal monitoring of gas and co sensors

6. In principle, the construction of 21052 upper auxiliary roadway in the goaf adopts hand pick excavation without blasting. If blasting, special measures must be formulated to strictly design and construct blast holes. Blast holes must not be arranged within 0.5m around the water injection holes and exploratory holes at the socket head. The distance between the blast hole through holes and the exploratory holes and water injection holes must not be less than 0.5m. Crossing and string holes are strictly prohibited

7. The shift attendant of the working face must carry a qualified portable gas instrument and hang it in the air flow in the middle of the non air duct side roadway, which is meters away from the Wotou and no more than 300mm away from the roadway top. When CH4 exceeds the limit, the work must be stopped immediately, the power supply must be cut off, the personnel must be evacuated, and the implementation of the production line at home and abroad must be reported to the dispatching room, ventilation dispatching, and the new high safety department

8. Since 21052 upper auxiliary roadway is tunneling in the goaf, it is necessary to strengthen the project quality management, adhere to the short excavation and short support, and strictly prevent the empty side and roof (the heading face must be prepared with a sufficient number of roof fall prevention materials of various specifications). If the hollow wall and roof must be filled, otherwise it is strictly prohibited to excavate and the team leader and monitor on duty shall be investigated. At the same time, it is necessary to reasonably select the position of lifting shed and pole, so as to avoid the reduction or insufficiency of the air volume of the wot due to the squeezing of the air duct by lifting shed and pole

9. Strengthen the management of local fans, and designate special personnel to be responsible for fan management. Check the operation of the fan frequently. When the fan or switch (including standby) fails, it must be handled immediately and reported to the ventilation dispatching room and the dispatching room, and ensure the integrity and normal use of the wind power locking device

10. Strengthen dust prevention management, regularly wash and clean coal dust, achieve startup and watering, and strengthen coal seam water injection (if it is necessary for safety production, the construction team may not inject water after the measures are prepared and approved by the chief engineer), so as to prevent the flying and accumulation of coal dust

11. The number of people on duty in each shift of 21052 upper roadway heading working face shall be truthfully reported to the dispatching room by the on duty attendant

12. The technician assists the rescue team members in strictly training the use of self rescuers for all employees of the 21052 upper roadway heading face, so as to ensure that every employee can skillfully use the self rescuers in emergencies such as co overrun

13, 21052 the materials stacked in the heading face of the upper auxiliary roadway shall not exceed 1/3 of the roadway section, and shall be neatly stacked on the roadway side. It is strictly prohibited to stack materials on the pedestrian side of belt lane and chute lane to avoid affecting the evacuation of personnel in case of emergency

14. When excavating in the empty area, take measures to deal with it or cooperate with relevant departments to deal with it, and resolutely achieve unsafe production, Accident potential "There is a huge demand for new materials in the future, and they will not be processed or produced.

VII. The chief of the safety section and the captain of the Security Inspection Brigade are responsible for the following work:

1. Each shift sends a professional and strong hearted full-time safety and quality officer to the 21052 Shangfu Lane heading working face. The full-time safety and quality officer must work with a certificate, and strictly implement the gas patrol inspection system, the request for instructions and report system and the on-site shift system. The gas inspection and report of each shift shall not be less than 3 times, especially Special situations should be checked and reported at any time. When the gas concentration in the air flow or return air flow of the heading face reaches 1%, the power supply of the face must be cut off, the work must be stopped, the personnel must be evacuated, measures must be taken to deal with it, and the control room, ventilation section and safety section must be reported in time; When the gas concentration in the airflow of the heading face reaches 1.0%, the drilling with electric drill must be stopped; When the gas concentration in the air flow within 20 meters of the blasting site reaches 1.0%, blasting is strictly prohibited; When local gas accumulates in the roadway, the work must be stopped within 20 meters nearby, the personnel must be evacuated, and the power supply must be cut off for treatment. When the gas concentration in the air flow within 20 meters around the motor or switch reaches 1%, it must stop running, cut off the power supply, evacuate personnel, deal with it, and report to the dispatching room, safety department and ventilation Department in time