Controlling Oxygen by Filling Nitrogen to Prevent Gas Accidents in Coal Mine

A technology for coal mine gas and accidents, which is applied in the field of preventing and controlling coal mine gas accidents by filling nitrogen and controlling oxygen. It can solve the problems of frequent gas accidents and poor gas concentration control effect, so as to improve safety, save outburst prevention costs, and reduce outburst prevention indicators. Effect

Active Publication Date: 2011-12-21
陈德成
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Problems solved by technology

However, the control effect on the gas concentration is poor, and the limit is sometimes exceeded, and the ignition source is also generated from time to time, so gas accidents occur frequently, and the death toll caused by gas accidents in the country is more than 1,000 every year. Therefore, gas prevention and control is an important aspect of coal mine safety production the key of

Method used

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  • Controlling Oxygen by Filling Nitrogen to Prevent Gas Accidents in Coal Mine
  • Controlling Oxygen by Filling Nitrogen to Prevent Gas Accidents in Coal Mine

Examples

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example 1

[0040] For the mine whose main shaft is arranged in hard and dense surrounding rock, it can be sealed between the shaft and the stone gate. The specific sealing method is as follows:

[0041] 1. Two isolation doors with good sealing performance shall be constructed before the 10-meter legal line distance before the first coal seam is opened in Shimen.

[0042] 2. There is a set of automatic temperature adjustment equipment 11 in the isolation room, which can compare and control the gas temperature between the two doors and the outside temperature. Before personnel and equipment (equipment) enter the door, start the temperature adjustment equipment to adjust the temperature, so The temperature between the two doors is more than 5 degrees lower than the outside temperature.

[0043] 3. Before personnel and equipment enter, open the nitrogen pressure inlet pipe in the door, press nitrogen in, and increase the gas pressure in the door. The temperature between the two doors is low...

example 2

[0045] 1. For the wellbore arranged along the inclined direction of the coal seam, the isolation room should be set at the initial section of the area where the surrounding rock is stable and the gas content of the coal seam has become high gas.

[0046] 2. Under normal circumstances, since the space position of the isolation room is lower than that of the outside air, it is only necessary to install a set of automatic temperature adjustment equipment 11, and adjust the temperature of the gas in the isolation room to be lower than the temperature of the outside air according to a temperature difference of more than 5 degrees, that is, It can effectively prevent the entry of outside air.

[0047] 3. In special cases, if the space position of the isolation room and the position of the mining space are higher than the position of the end face contacting the outside air, use the automatic temperature adjustment device to adjust the gas temperature in the isolation room higher than ...

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Abstract

The method of filling nitrogen and controlling oxygen to prevent and control coal mine gas accidents is to set up an isolation room under the mine to seal off the mining space with gas, so as to isolate the oxygen of the outside air from the mining space; set up a gas monitoring and monitoring system to monitor the concentration of nitrogen and oxygen Management, guide the mixed gas in the mining space to circulate the air flow, and use the gas monitoring and monitoring system to manage the oxygen concentration of the mixed gas in the mining space. If the oxygen concentration exceeds 5%, an early warning signal will be issued, and the automatic control system will automatically cut off the power supply when the oxygen concentration reaches or exceeds 8%. ;Set up a set of nitrogen filling pipeline system and gas drainage pipeline system in the mining operation space. When the oxygen concentration of a certain section of roadway reaches the warning concentration, start the nitrogen filling system and gas drainage pipeline system to replace the gas in the overrun area, so that the oxygen concentration Reduce to a safe value range; install an automatic temperature adjustment device in the isolation room, and adjust the temperature difference between the isolation room and the outside air tunnel by 5°C; it can effectively prevent and control gas accidents.

Description

technical field [0001] The invention relates to the technology for preventing and controlling gas accidents in coal mines, in particular to a method for preventing and controlling gas accidents in coal mines by filling nitrogen and controlling oxygen. Background technique [0002] The traditional method of coal mine gas accident prevention and control technology is to introduce the atmosphere into the mining space under certain ventilation conditions, conduct personnel inspection and equipment monitoring and control of the gas concentration in the mixed gas in the mining space, and at the same time control the underground ignition source. methods to prevent gas accidents. However, the control effect on the gas concentration is poor, and the limit is sometimes exceeded, and the ignition source is also generated from time to time, so gas accidents occur frequently, and the death toll caused by gas accidents in the country is more than 1,000 every year. Therefore, gas preventio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 陈德成
Owner 陈德成
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