In recent years, coal mine gas explosion accidents happen all the time, which bring indelible pain to people. It was summer and the weather was hot. The gas explosion occurred one after another.

Case study

At 17:50 on June 4, a coal and gas outburst accident occurred at the coal roadway of Xiashungway 3002 in the sixth mine of Henan Hebi Coal Power Co., LTD., resulting in one death and seven missing contacts.

At 12:7 on June 5, a coal and gas outburst accident occurred in the shaft of Shenghe Coal mine of Jixi Mining Company of Heilongjiang Longmay Mining Group. Eight people were working on the working face at the time of the accident. Fortunately, all the eight people who lost contact survived.

At 13:15 on November 4, 2020, a gas explosion occurred in Tongchuan Qiaoziliang Coal Industry Co., LTD., Yintai District, Tongchuan City, Shaanxi Province. 42 people entered the well while on duty, 34 people safely raised the well, and 8 people lost contact. As of 23:45 on November 10, after all-out rescue, the bodies of the eight trapped people had been found and transported out of the well.

On October 31, 2016, a particularly serious gas explosion occurred in Jinshandou Coal Industry Co., LTD., Yongchuan District, Chongqing, resulting in 33 deaths, one injury, and a direct economic loss of 36.82 million yuan.

At about 1:40 am on June 21, 2010, an underground gunpowder spontaneous combustion explosion occurred at Xingdong No. 2 mine in Weidong District, Pingdingshan City. As of 10 o 'clock, 26 people were found alive and 46 people were found dead after multiple searches.

What is the gas

Gas, also known as biogas, natural gas, its main component is methane. It is a colorless, odorless, tasteless, flammable and explosive gas.

Gas explosive power

Gas explosion hazards are the result of a chain reaction, is a certain concentration of methane and oxygen in the air under a certain temperature to produce intense oxidation reaction of disasters, is a serious disaster in coal mine production.

If the concentration of gas in the air is between 5.5% and 16%, an explosion can occur in the case of an open flame. Gas explosion will produce high temperature, high pressure, shock wave, and release toxic gas.

Gas explosion is the most serious disaster in coal mine, with strong destructive, sudden, often causes a large number of casualties and property losses. In the process of dealing with gas explosion accidents, if the handling method is not proper, the main points are not accurate, there may be several gas explosions, resulting in the expansion of the accident.

Main component of gas - methane

At room temperature atmospheric pressure, methane is colorless, odorless, extremely insoluble in water, easy to burn asphyxiating odor. The simplest organic matter, with formula CH4, is also the one with the smallest carbon content (and the largest hydrogen content). Methane is widely distributed in nature and is the main component of natural gas, biogas, and pit gas, commonly known as gas.

Nowadays the methane gas mainly derived from the decomposition of organic waste, Nature's own natural source of marsh methane; It can also be extracted from fossil fuels; The presence of bacteria as well as plant and animal matter in rice fields is heated or burned by oxygen deprivation.

Methane purposes

Methane is a special compressed gas in steel cylinders, which can be used as a chemical raw material to produce acetylene, hydrogen, synthetic ammonia, carbon black, nitrochloromethane, carbon disulfide, chloromethane, dichloromethane, trichloromethane, carbon tetrachloride and hydrocyanic acid.

Methane is a flammable gas, a clean fuel, and an important component of natural gas.

And can be used for city gas, natural gas mainly for civil (cooking, hot water, heating, cooling, commercial, auto gas, industrial fuel, gas, etc.

Methane hazard

In common use, the basic is non-toxic and methane on methane in gas concentration is too high, can reduce content of oxygen in the air, insufficient oxygen content in the human body, cause choking. If inhaled too much methane, need to quickly from the scene to outdoor air ventilation, keep respiratory tract unobstructed and immediate medical care.

The self-rescue and mutual rescue measures of miners after the explosion in the excavation work

If a small explosion occurs, the excavation roadway and support are basically not damaged, and the miners in distress are not directly injured or seriously injured, they should immediately open the self-rescue device they carry with them, and quickly withdraw from the roadway after wearing it and reach the fresh air. Near to the injured, in helping its good wear self-rescuer, helping to pull out of danger. The injured who can not walk should be carried to the fresh air within 30m ~ 50m near the fresh air. If the distance is far, you can only wear a self-rescue device for it and cannot lift it. After the evacuation of the disaster area, it is necessary to immediately report to the mine leader or dispatcher room and send the mine rescue team to rescue.

Closing remarks

Life in the peaceful country and safe people today, picturesque, years when the song. Life is precious and safety is priceless. For the happiness of the family, for the prosperity of the enterprise, for the prosperity of the economy, for our world less sad, more joy, please pay attention to safety, be careful, security accidents will be more and more far away from you.