Causes and preventive measures of explosion injury

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Causes and preventive measures of coal mine blasting injury accidents

the overall situation of coal mine safety production in China is stabilizing and improving. The total number of accidents decreased significantly. However, compared with the requirements of the Party Central Committee and the State Council and the expectations of the people across the country, there is still a big gap. 5. The manual hydraulic universal material testing machine is still in a serious situation. Coal mine accidents still occur frequently and repeatedly, and the mortality rate of one million tons of coal production remains high. It has seriously affected the development of China's coal industry. Blasting safety management is one of the important links in coal mine production management and safety technology work. In recent years, Nanjiang Coal Power Co., Ltd. has seriously implemented various guidelines, policies, laws and regulations for safety production, adhered to the policy of safety first, prevention first, comprehensive treatment and the principle of paying equal attention to management, equipment and training, and adopted a series of important measures in terms of system, mechanism, management, investment, etc, The safety production work of the company has been continuously strengthened and improved, the enterprise benefits have been significantly improved, the income of employees has been greatly increased, and the safety and steady development of the enterprise have been promoted

carefully learn the lessons of coal mine blasting accidents, strengthen blasting safety management, and constantly improve the operation level of blasting personnel. The company designated April 16 as the safety warning education day every year. During the event, the company held a blasting business knowledge training class. Through training and examination, the blasters deeply realized that the harm of illegal blasting and the seriousness of causing accidents are illegal, Further enhance the safety awareness and professional knowledge of the blasters, improve the safe blasting operation skills, and lay a solid foundation for the company's future safety production

don't forget the past, the teacher of the future. Looking at the typical cases of coal mine explosion injury accidents in China, it is not difficult to find that a bloody explosion accident, a fresh life, can not express the pain in our hearts in words. Behind each explosion injury accident, the culprit of "three violations" has been proved. Accidents are inevitable if three violations are not reversed. Illegal operation leads to accidents. The three violations are executioners. The three violations harm people and themselves! By constantly improving the user's riding experience and enhancing environmental protection benefits, through the summary and analysis of the cases of explosion injury accidents, we can roughly analyze the reasons for the explosion design and development of 1151 type gear pump extruder injury accidents from the following aspects:

first, the explosion bus is too short, the safe distance to avoid the explosion is not enough, and the avoidance selection is improper, resulting in flying coal and flying stones injury; Second, during blasting, the provisions on blasting warning in the coal mine safety regulations were not implemented, and warning channels were missed, or the warning personnel were not strong hearted, and personnel mistakenly entered the blasting site. Enter the working face for inspection and operation without authorization before shooting is completed; Third, the handling of misfire and residual explosion was not carried out according to the procedures and methods specified in the coal mine safety regulations, and the handling methods prohibited by the coal mine safety regulations were used at will, resulting in the sudden explosion and collapse of the misfire blast hole; Or the blaster brings the detonator into the warning area in violation of regulations, and uses ignition and discharge to detect whether the electric explosion circuit is connected, causing injury accidents; Fourth, when the explosion is refused after power on, the waiting time for entering the working face is too short, or it is mistakenly believed that it is a circuit fault and enters in advance, resulting in collapse; Fifthly, before connecting the line, the pin wire of the electric detonator did not kink into a short circuit, causing stray current to pass through the blasting circuit or detonator, causing the detonator to suddenly explode and injure people; Sixth, the blasting system is not strictly implemented, the detonator and its handles and keys are thrown around, or the fixed blasting bus is used arbitrarily, resulting in the chaos of blasting work. When someone works on the working face, another person uses the detonator to energize and detonate, resulting in the collapse of people

The lesson of blood should be taken as a lesson. By analyzing the causes of blasting injury accidents, we can take the following measures to prevent the occurrence of blasting injury accidents:

first, the blasting bus should be long enough, and the safe distance to avoid blasting should comply with the provisions of the operating procedures. That is, when excavating the moraine head of the whole rock straight roadway, the blasting avoidance distance is not less than 150 meters, and when excavating the whole rock turning moraine head blasting, the blasting avoidance distance is not less than 120 meters; When blasting the moraine head in the straight roadway of the driving coal roadway and semi coal roadway, the distance to avoid blasting shall not be less than 120 meters; Blasting at the turning moraine head of heading coal roadway and semi coal roadway, and the distance to avoid blasting shall not be less than 90 meters; When excavating the whole rock and blasting at the moraine head, the avoiding distance shall not be less than 150 meters, and the personnel shall be in the avoiding hole; The blasting distance of coal mining face shall not be less than 50 meters. Second, when blasting, the safety warning must comply with the provisions of the "coal mine safety regulations" on blasting warning, and the team leader must personally assign special personnel to guard the warning line and all roads that may enter the blasting site. No one is allowed to enter the blasting site before the blasting is over. The total cash flow of the watchman is 1.492 billion euros. The watchman must be on guard in a safe place. A person with strong heart must be designated as a watchman. One watchman cannot guard two channels at the same time, and the warning position must be outside the warning line. After blasting, only the team leader notifies to remove the warning, can he go to the blasting site to check the blasting results and other conditions; Third, when the charge hole does not sound after being powered on, if the delay electric detonator is used, it must wait at least 15 minutes before inspection along the line, and it is not allowed to enter the working face in advance, so as to avoid blasting and collapse; Fourth, the blaster should be the last to leave the blasting site and issue several blasting alarm signals according to the regulations. Before blasting, the number of people should be counted. Fifth, take effective measures to avoid sudden explosion and collapse caused by stray current; Sixth, the blaster should carefully and carefully check the blasting condition of the working face after blasting, so as to prevent the left misfire and residual blast holes. When dealing with the misfire and residual explosion, the procedures and methods specified in the coal mine safety regulations must be followed. The blaster is strictly forbidden to bring the detonator into the warning area, and it is strictly forbidden to detect whether the electric explosion circuit is connected by ignition and discharge. Seventh, blasters should properly keep explosives, detonators, detonators and their handles and keys to avoid accidental injury

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