Discussion on security measures of tunnel construction in flood season.
A, mine profile
(1) Location:
Liangshuigou Coal Mine is located in Ajia Township, southeast of Shuicheng County, and belongs to the west section of Sutian Minefield in Gemudi Mining Area, Shuicheng County, Guizhou Province. The administrative division is under the jurisdiction of Ajia Township, Shuicheng County, and the geographical coordinates are: East longitude10453' 35 "~10454' 27"; North latitude 26 30 ′10 ″ ~ 26 30 ′ 49 ″.
The mining area is 25 kilometers away from Liupanshui South Marshalling Station and 23 kilometers away from Shuicheng County. Shuicheng-Ajia highway passes through the mining area, and the mine traffic is convenient.
(2) Mining:
The industrial site is located in the east of the mine field, and the site elevation is+1646 ~+1687m. Adopt inclined shaft to develop. There are three shafts, namely main inclined shaft, auxiliary inclined shaft and return inclined shaft. At present, the wellhead standard of the main inclined shaft is+1660.40 1m, and the wellhead elevation of the auxiliary inclined shaft is+1680m. Rock strata are supported by bolt, mesh and shotcrete. The cross section of the main inclined shaft is a three-center arch, and a belt conveyor is laid in the shaft to undertake tasks such as coal transportation and air intake in the mine; The cross section of the auxiliary inclined shaft is semicircular arch, and a track of 30kg/m is laid in the shaft to undertake the tasks of mine gangue transportation, materials and equipment, air intake, personnel transportation, pipeline laying, etc. Return air inclined shaft is a semicircle arch, which is responsible for mine return air.
The mining elevation of this mine is+1620 ~+ 1000m, and the whole mining area is divided into two levels and three mining areas, one level is a mining area; The second level is up and down mining, with two mining areas and three mining areas. Contact deep mining area with three downhill roads. The first mining area is the first mining area, and the mining sequence of each mining area is: the first mining area (+1620m ~+ 1400m) → the second mining area (+1200m) → the third mining area (+1200m).
Coal seam mining sequence: mining sequence from top to bottom: C 1 coal seam →C5 coal seam →C8 coal seam →C67-69 coal seam.
At present, the underground mine is arranged in the horizontal mining area: 1 1 82 coal mining face, 1 126 1 xiwa entry lane,1kloc-0/xiwa return air lane, 650.
(3) Develop roadway layout:
When mining a level, there are main, auxiliary and return air inclined shafts in the mine; The inclination of the main inclined shaft is 23, the inclination of the auxiliary inclined shaft is 24, and the inclination of the return inclined shaft is 23; The main and auxiliary inclined shafts and return air shafts are arranged in the+1400 m horizontal parking lot, and the water pump room and water storage room are arranged in the+1400 m horizontal parking lot; The main, auxiliary and return air inclined shafts are all arranged to+1400m level.
Two, the establishment of flood control and security work leading group:
Team leader: AARON Li (mine manager)
Deputy Team Leader: Kuang (Chief Engineer)
Members: Zhou Xun 'an (safety mine manager), Chen Baixia (production mine manager), (electromechanical mine manager), (logistics mine manager), Xu De 'an (director of dispatching room), Li (deputy general manager of defense chief), (deputy general manager of mining industry), Qu (captain of auxiliary rescue team) and Chen Tiebing (electromechanical captain).
Responsibilities of the leading group:
Concentrate on the "flood season" work of Liangshuigou Coal Mine, improve the disaster prevention and resilience of our mine, take effective measures to curb the occurrence of "flood season disasters" accidents, and make arrangements and arrangements as soon as possible to ensure the safety of the mine during the flood season.
The leading group of "Safety in Flood Season" made overall arrangements for the work of "Flood Season" in coal mines, and made it clear that a special person was responsible for inspecting and handling the hidden dangers that threatened mine safety inside and outside the industrial square. Ensure that the "flood season" work is solid and effective from the aspects of people, money, materials and measures.
Regularly carry out the inspection of mine "flood season" work, and organize special inspection of "flood season" before the arrival of flood season. The main contents of the inspection are: (1) the preparation of each team in flood season; Whether the system is perfect; Whether the relief materials are in place; Whether the water prevention and control work is implemented; Whether the prevention of geological disasters is implemented; Whether the underground waterproof and drainage system is perfect; Whether the lightning protection work is put in place; Whether the mine flood investigation work is implemented on the drawings; Whether preventive tests are conducted for coal mine power supply, and whether the test results are reliable; Whether the implementation preparation is in place. Specific implementation of the following aspects of work:
1, June 1, the mine set up a leading group in flood season to improve the leadership responsibility system and duty system at all levels.
2. Collect local meteorological data in time. Before entering the rainy season, it is necessary to conduct a comprehensive and detailed inspection of all water prevention and control facilities in the well and underground, and handle problems in time to ensure their reliability and effectiveness.
3. Organize personnel to conduct a comprehensive inspection and maintenance of the flood drainage ditch of the industrial square and the Baiche River near the industrial square, and prepare the "flood season" project plan to ensure the organization is completed before the flood season.
4. The supply department should prepare enough ground emergency materials, set up a special warehouse for materials in flood season, arrange special personnel to keep them, and be on duty 24 hours a day to ensure the timely supply of relief materials in case of danger.
5. Organize personnel to clean the main and auxiliary water tanks, ditches, sedimentation tanks, etc. , and the secondary main drainage pipeline maintenance, to ensure smooth drainage.
6. Conduct a comprehensive inspection of the lightning protection facilities of the ground buildings, and detect the resistance of the lightning protection facilities of the main structure, and solve the problems in time when found to ensure safety.
7, the water pump and electrical equipment to conduct a comprehensive overhaul, the problem is serious to replace, check the efficiency and operation of drainage equipment, to ensure that the mine drainage system, drainage capacity, drainage equipment operation in line with the requirements of the "coal mine safety regulations".
8, underground each tunneling faces installed telephone, video installed in place. All the staff on duty can't turn off their mobile phones. When receiving an evacuation order from a dangerous water disaster, all personnel of the threatened water disaster association shall be immediately notified to evacuate the dangerous area according to the disaster avoidance route.
9, combined with the actual situation of our mine, set up a flood fighting and emergency rescue team with actual combat capability, and organize drills, so that it can be drawn and used at critical moments.
10, compile the underground flood route and safety technical measures, conduct comprehensive inspection and maintenance of the mine route and signs, and make all underground personnel familiar with the warning of the route and safety exit.
1 1. Contact the meteorological department at any time, or collect various meteorological and hydrological data through the Internet to provide reliable basis for the leading group.
Third, the focus of flood season work
1, hidden dangers rectification: the hidden dangers identified must be rectified within the specified time, and the monitoring in flood season should be strengthened, and safety measures should be strictly implemented to ensure foolproof.
2. Water disaster in mining area: It is necessary to find out the water disaster in mining area. Designated personnel shall regularly investigate and inspect the adjacent mines, abandoned old kilns, ground subsidence pits, mining cracks, reservoirs, rivers and other key parts that may affect mine safety, and draw the wellhead position, mining scope and water accumulation of adjacent mines at least 100m outside the mine on the underground and underground control charts.
1), ground conditions:
(1), surface water conditions
There are no large reservoirs and rivers on the surface of the mine field, but only seasonal rivers with hundreds of cars, which has little influence on the underground.
(2), the old pit.
There are shallow old kilns within the scope of this mine field, which are basically located at the outcrop of coal seam in the mine field. Old empty water seeps into the mine through mining cracks, which has a certain impact on mine safety production. Before the rainy season comes, the mine will clean up and fill the old kiln.
(3) Collapse pit
No obvious collapse pit was found on the ground within the scope of the mine field, only local old kiln collapsed, but there was no water.
(4), the rainy season three prevention management.
From June 1, strengthen the inspection within the mining area, make records and deal with hidden dangers in time, especially before and after each rainstorm. Arrange personnel to clean the ground flood control ditch before the rainy season.
2), downhole situation:
(1), the old kiln water and formation water in Huailiang Coal Mine are the main sources of mine water, and the water has been strictly exploited, so there is no threat of water accumulation now.
(2) In 2016 years, the main tunneling faces are:1kloc-0/261xiwa back alley,1261xiwa back alley,/kloc-0.
(4) Strengthen the management of underground pumping and drainage system, and arrange to clean up a water warehouse before the flood season. Three pumps must be in good condition and have spare pumps, and secondary pumping and drainage pipes, gate valves and switches should be overhauled.
3. Seasonal roof management: The technical office must implement and formulate special measures for roof management in the "flood season" of the excavation, excavation and underground maintenance operation site, ensure the engineering quality of the operation site, strengthen the control of roof water, strengthen the support of fault fracture zone and loose coal quality area, and strengthen the monitoring and maintenance of alleys, crosscuts and main inclined lanes; Ensure that the drainage equipment of each working face is in good condition and reliable, and all kinds of spare materials and equipment are sufficient. The operation standard of special type of work and emergency measures conform to the standard, which laid a solid foundation for the smooth progress of flood control.
4. Communication system: The electromechanical team is responsible for installing communication systems in the main workplaces under the well to ensure smooth communication.
5. Management of water exploration and drainage: When the tunneling faces are started, we must insist on geophysical exploration first and drilling verification. After the start of construction, we must adhere to the principle of "digging before exploration, digging before exploration, mining before exploration and mining after exploration". For the areas near the mining face that may accumulate water, such as abandoned water silos and goaf of old kiln, the geological prospecting department must prepare special drainage design and measures in advance. If there are signs of flooding, the operation must be stopped, and measures should be taken and reported immediately to prevent flooding accidents.
Drilling acceptance system: (1) Drilling acceptance is carried out by the security officer of the Ministry of Security and the video of the dispatching room. The safety officer must count the number of drill pipes in site construction. After acceptance, the driller and the safety officer shall sign the acceptance sheet at the same time. Receipt in triplicate, one for the construction unit, one for the security department and one for the comprehensive prevention department. After the design drilling of each drilling field is completed, the acceptance receipt kept in the ventilation work area shall be filed by the traffic wind department.
(2) During on-site acceptance, the part where the drilling depth exceeds that specified in (4) shall not be measured, and the design error of drilling azimuth is greater than 2, and the inclination angle and design error are greater than 1.
(3) Every ten days, the management personnel of ventilation department, safety supervision department, ventilation work area technicians and above, and the management personnel of the sampled unit participate in drilling random sampling. There shall be no less than 3 sampling holes in each drilling field, and the sampling contents include azimuth, dip angle and hole depth. The sampling method can use anchor cable, 4-point iron pipe and drilling rig for re-drilling, and the workload generated by the construction unit in the process of hole inspection will not be assessed. After the spot check, there must be relevant spot check records, and the acceptance sheet must be submitted to the professional vice president for review. If the number of drilled holes is inconsistent with the acceptance receipt after spot check, the number of drilled holes shall not be measured; If three consecutive drilling holes are verified as false holes in the spot check, all drilling holes in the drilling field must be re-verified, and the number of drilling holes in the drilling field shall be subject to the final verification; If the drilling hole has been sealed and pumped, and the hole inspection conditions are not met, all the drilling quantities (including sealing and pumping costs) at the drilling site will not be measured.
(4) After the drilling construction, the construction unit shall report the drilling achievement map to the ventilation department in time, and the ventilation department will organize an audit of the drilling achievement map to see whether the drilling control range can meet the requirements and whether there is a blind spot within the control range. If drilling needs to be replenished after re-inspection, it must be replenished in time. Otherwise, the extracted drilling holes constructed at the drilling site will not be signed.
6. Hydrogeological work: During the flood season, it is necessary to strengthen the underground hydrogeological work, regularly observe the underground water inflow, carefully investigate and collect the mine hydrogeological data and the data of small coal mines in the mining area, regularly observe the underground hydrological changes before and after each rainstorm, and find out the reasons and make original records when finding abnormal water inflow.
7. Ground flood control: dredge ditches to ensure smooth drainage. Sufficient sandbags should be prepared for main shaft, auxiliary shaft and return air shaft to prevent surface water from flowing back into the shaft. When there is water leakage in coal mining subsidence area and outcrop of coal measures strata. It is necessary to reinforce the leaking base.
8. Management of office area and residential area: patrol the office area and dormitory area after the rain and take effective measures in time; Supervise the relocation of dangerous houses to prevent landslides and the collapse of dangerous houses from affecting the life and property safety of employees' families. For drainage ditches and culverts in residential areas, we should seriously organize personnel to clean them up to ensure smooth flow.
9. Emergency management of disastrous weather: meteorological observers will be set up in the dispatching room during the flood season. Observers should pay close attention to the local weather forecast, strengthen communication with meteorological and flood control departments, grasp the flood and hydrological early warning and forecasting information in time, establish and improve the disaster weather early warning and disposal mechanism, and strictly implement the emergency disposal system of immediate shutdown in bad weather to ensure that the rainstorm does not flood wells and the flood does not hurt people. In case of heavy rain, heavy rain and other bad weather, we must immediately implement the system of stopping production (stopping work) and withdrawing people, and report to the mine leader in time. When it rains, it is necessary to strengthen water regime monitoring, grasp the changes of mine water regime and rain regime in time, and immediately organize underground workers to evacuate to a safe place on the ground in an orderly manner in case of possible danger of flooding. At the same time, do a good job of patrol inspection and recording in rainy days, and publicize the daily weather forecast at the wellhead in time during the rainy season.
10. management of key sites: strengthen the "three defenses" inspection, especially the irregular inspection of key sites such as main shaft, auxiliary shaft, wind shaft wellhead, winch room, compressor room, substation, flood control material warehouse, etc., fully equip the personnel on duty, strengthen management, strictly investigate the discipline and responsibility on duty, and take effective measures in time when problems are found. Every inspection should have a special record, the signature of the inspector and so on.
1 1, emergency duty management: strengthen emergency duty in flood season, strictly implement the 24-hour scheduling duty system of mine leaders, and strictly prohibit empty posts. During the rainy season, adhere to the class newspaper system and the regular reporting system of the leaders on duty.
Fourth, the flood season work requirements
1, construction period: All projects involving flood season must be carried out in strict accordance with the construction period and procedures, and the security department will control the projects. It is forbidden for the construction unit to adjust the construction plan, which will delay the project during the flood season.
2. Responsibility implementation: The safety department will carry out regular and irregular special inspections according to the mine flood season work, and make four decisions on the problems within the jurisdiction of the responsible leaders and responsible departments and offices, and impose penalties.
3. Plan implementation: The security department will seriously implement the emergency plan in flood season to make it more targeted and operable, and organize all cadres and workers to study and make implementation records.
4. Quarterly report: The dispatching room will put the flood season work into the important work schedule and report the progress of the flood season project daily. At the same time, when reporting in small classes, we must report the rain situation and timely report the changes in the rain situation in the class.
5. Project management: strengthen the project management in flood season, strictly implement the system of confirmation and completion acceptance by the project office, and conscientiously implement it according to the principle of "who is in charge, who is responsible, who signs and who is responsible".
6. Special inspection: Before the rainy season, the security department will carefully organize the special inspection in the flood season; At the same time, it is required to organize flood control inspection every ten days during the rainy season, especially the progress of key projects and the rectification of hidden dangers during the flood season.
7. Emergency drill: Organize at least one emergency drill of "Three Preventions" in rainy season to improve the actual combat level. Special reports must be made in time during the drill, and after the drill, a serious summary should be made, and written materials should be written within 24 hours after the drill.
8. Flood control instruction: The dispatching room timely communicates and implements the flood control instruction of the superior, and there are orders that can't be done, and there are prohibitions.
9. Publicity and education: It is necessary to strengthen the publicity of the importance of work in flood season and the training and education of basic knowledge of flood control, focusing on personal safety and how to prevent lightning strikes, collapses and injuries in rainy season, so as to promote the improvement of safety awareness of grass-roots units and the remediation of potential safety hazards, and improve employees' awareness of self-protection and mutual protection.
Verb (abbreviation of verb) concrete measures
Mechanical and electrical department: responsible for comprehensive inspection and monitoring of mine lightning protection devices to ensure reliable operation; Conduct a comprehensive inspection of underground and underground power supply equipment and mine drainage system, and implement the existing problems in time to ensure that the water supply and drainage system is foolproof; Check and maintain the generator regularly to ensure smooth operation in case of emergency.
Safety section: responsible for guiding and supervising the regular inspection work in flood season, truthfully reporting the existing problems to the superior and tracking and solving them; Responsible for cooperating with the leaders on duty to complete the formulation and organization of the rescue plan at the rescue site.
Dispatching room: responsible for the formation of emergency rescue teams and emergency rescue teams. To meet the needs of emergency rescue work, be responsible for the convening, organization, command and task arrangement of emergency rescue team members; Responsible for organizing all forces to clear underground ditches and water tanks to ensure smooth ditches; Be responsible for strictly implementing the system of water exploration and drainage before excavation, and dig and explore; Conduct drills for emergency team members from time to time, improve emergency awareness, summarize and analyze existing problems, and report the drills to superior leaders in time.
Production technology department: responsible for comprehensive prediction and analysis of mine water source and water disaster prevention and control, and timely release relevant water disaster prevention and control information; Grasp the water inflow and water filling situation of each operating point in time, strengthen the supervision of the operating points with floods, and take decisive measures to deal with any abnormality in time.
General defense section: bagging, inspection and arrangement of flood control bags at the wellhead of the main shaft and the safety exit of the auxiliary shaft. General prevention can organize personnel to accept and supervise.
Surface water control
1, deep in the mine field, there is no water accumulation area within the scope of the mine field. According to the above calculation, leave enough shallow waterproof coal pillars.
2, old kiln and cracks, old kiln wellhead and cracks should be filled and compacted, build water retaining walls and drainage ditches, dig drainage ditches around the main shaft, auxiliary shaft and air shaft to ensure that surface water does not penetrate underground. When it rains, it is forbidden to destroy waterproof and safe coal pillars.
Groundwater prevention and control
1, strengthen mine hydrogeological work, find out the aquifer and fault water within the mine scope, and further find out the location and estimated water volume of the nearby old kiln.
2, underground water exploration, all underground tunneling faces must adhere to the principle of exploration every time, especially when underground tunneling faces are close to aquifers, faults, collapse columns, mined-out areas and other places where water may accumulate or encounter suspicious water sources, adhere to the principle of "exploration every time, exploration before excavation", and water exploration and excavation are coordinated: water exploration-water excavation-water excavation.
3, water, proved underground water source, according to the size of the water, water in a planned way, drain the water, eliminate the threat of water damage to production, water according to the mine drainage capacity, strictly control the drainage speed and displacement, strengthen the ventilation and harmful gas inspection, make special design and measures when water.
4. Set waterproof coal pillar (rock pillar): When all kinds of underground water sources are not drained, a certain width of coal pillar (rock pillar) should be left to separate the water body from the mining area. When the adjacent well mines the same coal seam, the coal pillar is more than 40 meters.
5. Establish reliable drainage system and facilities, strengthen the maintenance of drainage facilities, and equip with three pumps, one for use and one for repair.
6. The mine is equipped with three TXU- 1250 exploration diamonds.
7, mine management personnel on duty 24 hours in the rainy season, found that the problem timely report processing.
8. Prepare necessary waterproof tools: 20 shovels, 200 pickaxes 10, 200 sandbags, 5 cubic meters of wood, 2,000m of water pipes, 5 tons of stone powder and 0/0 raincoats/kloc-0.
VI. Safety measures
First, do a good job in water disaster investigation before the flood season. During the flood season, the safety leading group focused on the investigation and analysis of surface rivers, reservoirs, ponds, puddles and coal seams in the mining area. Focus on the investigation of water accumulation in the mine field and surrounding goaf; Investigate underground areas threatened by confined water, fissure water, fault water and overlying formation water. Focus on organizing technical demonstration and analysis of the above problems, and bring them into the rectification management.
The second is to study and formulate the flood season work plan in time. In accordance with the requirements of the plan, carefully sort out and check all the materials needed for flood control and emergency rescue, survey and dig the ground flood control and drainage channels and ditches to ensure the smooth flow of flood discharge channels.
Third, do a good job in flood season project management. In accordance with the flood season project plan and implementation plan, strengthen the management of ground and underground prevention projects, comprehensively overhaul and test lightning protection devices, power supply facilities and relay protection devices to ensure reliable power supply; Water pump, drain pipe, electric control equipment and other drainage facilities are put into inspection wells, and the drainage system is jointly debugged to ensure that the capacity is matched, the equipment is in good condition and running normally;
Fourth, strengthen the observation, inspection and maintenance of water prevention facilities in and out of wells to ensure safety and reliability; Improve the hydrological observation system above and below the well for normal observation. If any abnormality is found, handle it in time.
Seven, avoid disaster line:
1 1 182 coal mining face:
Route to avoid fire and gas accidents: working face →1182 transport lane → 1490 transport stone gate → main shaft → ground.
Route to avoid flood accidents: working face →1182 return air lane → 1526 transport stone gate → main shaft (auxiliary shaft) → ground.
1 126 1 xiwa lane:
Gas and fire avoidance routes:
Working face →+ 1 1 siwahui →+ 1526m transport stone gate →+ 1526m main shaft overhead man-vehicle (auxiliary shaft) → ground.
Flood avoidance route:
Working face →+ 1 1 siwahui →+ 1526m transport stone gate →+ 1526m main shaft overhead man-vehicle (auxiliary shaft) → ground.
1 126 1 xiwa into the lane:
Gas and fire avoidance routes:
Working face → 1 126 1 xiwa entrance →+ 1490m transport stone gate →+ 1490m main shaft overhead man-vehicle (auxiliary shaft) → ground.
Flood avoidance route:
Working face → 1 126 1 xiwa entrance →+ 1490m transport stone gate →+ 1490m main shaft overhead man-vehicle (auxiliary shaft) → ground.
Eight, assessment methods
1, report in time when major danger is found, and 500 yuan will be rewarded in the mine if he has made significant contribution.
2, positive, serious and responsible for flood control work, coal mine reward individual 200 yuan.
3. The management personnel shall be fined 300 yuan for leaving without reason, and the personnel on duty shall be fined 200 yuan for leaving without reason.
4. The inspectors found that the personnel on duty did not perform their duties, gave a verbal warning, fined 500 yuan three times and replaced the personnel on duty. The person in charge of the unit shall be fined 1000 yuan.
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