一通三防

一通三防 One hundred basic problems of "three defenses" 1, what are the policies for safe production of the state and coal mines? Answer: safety first, prevention first. 2, in the vicinity of the local fan and its switch 10m range, the airflow in the gas concentration is not more than how many times, you can start the local fan? Answer: 0.5%. 3. What is called blind alley? Answer: the depth of more than 6 m, can not use mine full ventilation ventilation Lane known as blind lane. 4, mine ventilation method to get the power source of different wind, which can be divided into two? Answer: natural ventilation and mechanical ventilation. 5. The air temperature in the working face of production mine shall not exceed the temperature Answer: 26 degrees centigrade. 6, the production of mine electromechanical equipment room air temperature can not be more than how many degrees? Answer: 30 degrees centigrade. 7, the local fan stops running for some reason, and when the concentration of gas in the stop air area is more than or the carbon dioxide concentration exceeds more than that, it is necessary to formulate safety technical measures for releasing the gas or carbon dioxide Answer: gas concentration of more than 1% or carbon dioxide concentration of more than 1.5%. 8, coal mining face back air flow in the gas concentration more than how much, must stop work, cut off the power supply, withdraw from personnel, for processing Answer: 1%. 9, when the concentration of gas in the airflow in the driving face is more than that, the work must be stopped, the power supply will be cut off, and the personnel will be removed for further treatment Answer: 1.5%. 10, methane, temperature and carbon monoxide sensor hanging standards? Answer: should be vertical suspension, from the top of the roof shall not be greater than 300mm, from the side wall of the roadway is not less than 200mm (ie top three gang two). 11, what is the local fan "three special two block"? Answer: "three" refers to the local fan power supply should adopt special transformer, special switch, special line, "two block" is wind power, gas power interlocking lock. 12, gas inspection three counterparts, what does that mean? Answer: downhole plate, inspection records manual, gas accounts three counterparts. 13 Where should the press in place ventilator and the starting device be installed? Answer: must be installed in the intake lane, and from the drift tunnel back air shall not be less than 10m. 14, the use of partial ventilation ventilation driving face, shall not stop the wind; due to maintenance, power outages and other reasons to stop the wind, at least what should be done? Answer: withdrawal of personnel, cut off the power supply. 15, ventilation in series shall not exceed once, and in the entrance to the work surface into the air flow should be installed gas sensors, gas concentration shall not exceed the number Answer: 0.5%. 16, the mine effective air volume rate is not less than how much? Answer: 85%. 17, what are the gas concentration inspection times in the mining face? Answer: the normal operation of the mining face, low gas mine, every class at least 2 times, high gas and outburst mine, every class at least 3 times. 18, temporary stop wind place, immediately set off from people, fence, alarms reveal long-term stop wind zone, must be closed after a long time. Answer: 24h. 19, underground roadway, how does it belong to the accumulation of coal dust? Answer: coal dust thickness of more than 2mm, continuous length of more than 5m. 20, ventilation facilities around the number of M range, does not allow debris, water, silt? Answer: 5m. 21, what are the local air volume adjustment methods? Answer: increase resistance regulation method, resistance reduction regulation method, supercharging regulation method. 22, what functions does the security monitoring system have? Answer: methane concentration limit alarm and power-off / recovery control function and data storage function. 23, monitoring gas safety monitoring instruments and equipment, what should be used for debugging and calibration? Answer: air sample and corresponding standard gas sample or calibration gas sample are debugged and calibrated. 24, what principles must be adopted for discharging gas? Answer: the withdrawal, limited power, principles and forbidden cancellation. 25, what is the policy of "Twelve characters" for gas control? Answer: first pumping, mining, monitoring, monitoring, wind production. 26, what are the main causes of air leakage? Answer: hair dryer, hair dryer, a joint leakage leakage duct break leakage. 27, when the concentration of carbon dioxide in the air flow in the excavation face, we must stop work, withdraw personnel, identify the causes, and formulate measures to deal with it Answer: 1.5%. 28, because the gas concentration exceeds the specified cut off electrical equipment power, must be in the gas concentration fall below, can be complex to start the machine? Answer: 1%. No 29, the cancellation of the gas emission in the heading face, and shall make the gas and carbon dioxide concentration in exhaust airflow and airflow are mixed at full pressure shall not exceed the number? Answer: 1.5% 30, the total return air tunnel or one wing return air lane gas or carbon dioxide concentration more than how many times, we must immediately find out the reason for processing Answer: 0.75%. 31, gas monitoring device should first choose what type of electrical equipment? Answer: intrinsically safe. 32, if a fire occurs in the single coal lane and the gas concentration does not exceed the number of fire, to strengthen the ventilation, out of gas? Answer: 2%. 33. The dust concentration in the underground operation site should be measured at least several times a month Answer: 2 34, the number of tandem ventilation in the mining face shall not exceed several times Answer: 1 times. 35, the air return roadway, mining tailentry airflow in the gas concentration exceeds the number or concentration of carbon dioxide over much, must stop working and the withdrawal of personnel, to take measures to deal with? Answer: gas concentration of more than 1% or carbon dioxide concentration of more than 1.5%. 36. What is the maximum allowable concentration of CO in the mine? Answer: 0.0024%. 37, when the air temperature is more than the temperature, that is high temperature. Answer: 30 degrees centigrade. 38, who is fully responsible for the management of "one three, three prevention" technical business management? Answer: Chief Engineer 39, the Huozhou coal and Electricity Group Corporation specifies the power density of the methane sensor for the back face of the heading face? Answer: more than 0.8%CH4. 40. How long is the inspection time of the safety monitoring system? Answer: no more than 30S. 41, easy working face spontaneous combustion or spontaneous combustion of low gas coal mine air return way must be set what sensors? Answer: temperature sensors, carbon monoxide sensors. 42, when the power grid after power failure, The safety monitoring system must ensure that the normal working time is not less than a few hours Answer: 2 hours. 43, the safety monitoring equipment needs regular debugging, calibration functions, what are the items? Answer: zero point and sensitivity, alarm, power point, complex point indicator value, control logic value. 44 、 when ventilation is used in the heading face, methane sensors should be installed in the m before the fan in series Answer: 3-5m. 45. What sensors must be installed on the intake side of the electromechanical equipment room in the return air flow? Answer: methane sensor. 46, the main ventilation device outside leakage rate shall not exceed? Answer: 5% 47, the mine needs air volume, according to the number of people at the same time work at the same time, the amount of air per person per minute is not less than the number Answer: 4, M3 48 、 when the gas concentration reaches or exceeds the upper corner of the mining face, corresponding measures should be taken to deal with it Answer: 0.8%. 49, the ground fire pool must always keep no less than m3 of water Answer: 200. 50, the main fan room must be installed two sets of the same ability and can meet the production requirements of the main fan, one as a spare, spare fan must be able to start in a long time? Answer: 10min. 51, mining area after the end of the length of time, must be in all the mining area connected with the roadway through the installation of firewalls, all enclosed mining area Answer: within 45 days. 52, two meters in the distance between the meters through, you must stop working on a work surface, and must be kept parked work face normal ventilation A: the mechanized roadway is 50m apart, and the other roadways are 20m apart. 53, where underground gas accumulation is prone to? A: the gas accumulation sites are easy to mine, the mining face of stopping wind, the upper corner of the coal mining face, the blind lane of stopping wind, the roof falling hole and the top of the roadway with lower wind speed than the minimum wind speed. 54, what is the mine's internal air leakage? Answer: the mine interior air leakage refers to the underground ventilation facilities, goaf, coal pillars and other air leakage. 55, what is the lack of romantic? Answer: after mining work face and a few chamber after return air flow, its composition and ground air compare big difference, this kind of wind is called "lack wind". 56, mining face into the air, the concentration of oxygen is not less than 20%, carbon dioxide concentration is not more than how much? Answer: 0.5%. 57, what are the main dust prevention measures adopted by the mine? Answer: (1) establish perfect dust sprinkler piping system; (2) coal injection; (3) sprayer (4) air purification; (5) fire water gun mud; (6) (7) to help flush lane; wet drilling; (8) goaf irrigation; (9) isolation the explosion of water shed; (10) brush white roadway; (11) personal protection. 58, wellhead housing and ventilation room near many meters, there shall be no fireworks or the fireplace? Answer: 20m. 59. What is ventilation system? Answer: ventilation mode, ventilation method, ventilation network and ventilation structure. 60, "three chain shot" refers to which three people? Answer: team leader, shot officer, tile inspector. 61. What is called "circular wind"? Answer: part of the air return of the local fan or into the air flow of the same local fan. 62, what is called tandem ventilation? Answer: the return air of the underground wind place will again enter the ventilation mode of other wind place. 63, how to carry out effective avoidance of gas and coal seam explosion when underground? Answer: gas explosion accidents encountered and coal seam, to quickly back to the air vibration direction, face down and down, with a wet towel to cover your mouth and nose, to prevent inhalation of toxic gases; at the same time to quickly wear self rescuer, choose the roof strong, with water or water from close to shelter. 64, when underground fire accident, how to avoid disaster effectively? Answer: encountered fire accident, to ascertain the actual situation of the disaster and the first of their own, can destroy (fire) is destroyed, not destroyed (fire) quickly evacuate or escape, self-help or wait for rescue. 65, when coal and gas outburst occurs in underground, how should we effectively avoid the disaster? Answer: when coal and gas outburst accidents occur, it is necessary to quickly wear the isolation type self rescuer or enter the pressure air self rescue device or enter the refuge chamber. 66. How many kinds of ventilation are there in coal mine? Answer: Central, parallel, mixed three. 67 、 What are the rules for installing gas sensors in the heading face? A: the gas sensor at the working face is arranged on the opposite side of the air duct. The back air flow sensor is located within 10-15 meters from the back air gap within 5 meters from the working surface. 68, what are the main measures to prevent gas accumulation? Answer: first, strengthening ventilation is an effective basic measure to prevent gas accumulation. Two is to deal with the overrun and accumulation of gas in time. Three is a strict inspection and inspection system. 69, water fire should pay attention to what matters? The Answer: the fire must be from the fire inlet side, fire water, fire water from the peripheral jet, gradually forcing to the fire center; must have sufficient volume and smooth return airway, preventing water gas explosion. 70, what principles should be followed in dealing with fire accidents in mines? The Answer: (1) control the spread of smoke, without endangering the safety of underground personnel. (2) to prevent fire from spreading. (3) preventing the explosion of gas and coal dust, preventing Huo Feng pressure from causing the reversal of air flow and causing harm. (4) ensure the safety of disaster relief personnel and help rescue personnel in distress. (5) creating favorable fire extinguishing conditions. 71, what are the five major disasters in the mine? Answer: gas, roof, water, fire, coal dust. 72 、 What are the installation standards of the wind sensor? Answer: the air duct sensor must be set at a distance of no more than 20m. 73, "one shot three tests" refers to what? Answer: before loading, before blasting, after blasting, check the gas in the airflow respectively. 74, in blasting, must execute "three interlocking processing", licensed three party each hold what brand? A: the shooting officer holds the "shot card", the group leader has "warning signs", and the "inspector" (security officer) holds the "blasting command"". 75, how long must you tune the methane sensor and the carbon monoxide sensor that you are using? Answer: 7 days. 76, every few days must be a gas overrun, power outages, locking and methane wind locking function test Answer: 7 days. 77, belt conveyor side of the meter, how many meters should be set up smoke sensors? Answer: 10 - 15m. 78, welding, oxygen welding and other places of work in the wind, the gas concentration shall not exceed? Answer: 0.5%. 79 、 where should the gas check board of the air inlet in the stope face be located? Answer: should be located in the intake from the coal face 20 in the range of 30m. 80. Where should the gas check board for the airflow and upper corner of the stope be located? Answer: should be located in the return air lane, from the working face of the coal wall is not greater than 30m range. 81. Where should I set the gas check board for the digging face? Answer: should be located from the face of the head, not greater than 50m range. 82, what is "one pass, three defenses"? Answer: "one way" refers to mine ventilation, "Three Prevention" refers to the prevention and control of gas, coal dust prevention, fire fighting. 83, what is the basic task of mine ventilation? Answer: (1) the supply of fresh air and underground personnel enough; (2) diluted and remove the toxic and harmful gas and dust; (3) underground provides good weather conditions, combined to create good production environment. 84, what are the harmful gases in the mine air? Answer: common harmful gas in mine air: gas, carbon dioxide, carbon monoxide, hydrogen sulfide, nitrogen dioxide, sulfur dioxide, ammonia gas, hydrogen gas. 85, common mine ventilation methods have several? Answer: according to the working mode of the main ventilator, the ventilation method is divided into the following three types: (1) press in type ventilation (2), draft ventilation (3), pressure and mixed ventilation 86, what are the conditions for gas explosion? Answer: (1) oxygen concentration is not less than 12%; (2) gas concentration reaches 5 - 16%; (3) ignition source 650 - 750. C. 87. What is gas? Answer: the coal mine is mainly composed of coal-bed methane with methane based harmful gases. Methane is sometimes referred to separately. 88, mine safety monitoring equipment must be regularly debugged and corrected, coal mine safety regulations prescribed how long? Answer: at least once a month. 89, explosion-proof door how long must check, repair once? Answer: 6 months. 90 、 What are the rules of O2 and CO2 concentration in the inlet of mining face? Answer: in the air inlet of the mining face, the concentration of O2 is not less than 20%, and the concentration of CO2 is not more than 0.5%. 91, what kind of downhole damper generally include? Answer: permanent door, permanent damper, temporary damper. 92, coal mine safety regulations, the air inlet temperature below the wellhead temperature is how many degrees? Answer: must be more than 2 degrees celsius. 93, wind bridge what role? Answer: it is the ventilation structure that separates two intersecting inlet and return air. 94, what does the mine climate mean? Answer: Mine climate refers to the mine air temperature, humidity and flow velocity of the three parameters of the combined effect. These three parameters are also known as the three elements of mine climatic conditions. 95. What kind of underground seal does it include? Answer: include permanent airtight, temporary airtight two kinds. 96. What is gas accumulation? Answer: gas accumulation refers to the gas concentration in the tunnel at 2% or more, the volume reached 0.5m3. 97, what is called coal dust? Answer: coal mine in the mining production process of particles in particle size less than 1 mm called coal dust. 98, what are the rules for installing the water curtain in the digging face? Answer: from the face of the head, about 20m install a clean water curtain, about 50m from the work surface, install a clean water curtain, requiring water curtain spray not less than 5, the water curtain can cover the roadway completely broken. 99. What are the regulations for installing the water curtain in the mining face? Answer: working face intake water curtain is installed in the air inlet to install water curtain does not exceed 30m; return air lane is not more than 50m and at least two installed away from the coal wall, between the two spacing is not greater than 20m. 100, flameproof bag which is divided into several? Answer: the main and auxiliary flameproof Shuidai flameproof bag two.