JPS58120992A - Method of mining coal - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION This invention relates to a method for mining six coals by changing the air supply system in the shaft.

In most cases, coal is extracted from a face located at the tip of a long shaft extending along the coal seam using a power excavator such as a drum cutter or glide hovel.
Efforts are being made to transport the flask out of the tunnel using various means of transportation.

In modern coal mines, coal mining and transportation work is highly mechanical, but it is safe for many workers to work inside the shaft, and outside air is kept inside the shaft. One of them that always supplies 8 tons is Hikotsumata. After a long time, I tried to resist, and then ≦:
The atmosphere inside the tunnel near the face is filled with potash from the mixture of silt and coal dust, which could be the source of ignition or cause an explosion in the area. Coal seam explosion accidents that have occurred in the past have shown that the potential gravity danger of this vessel is extremely high, and if gas protrudes from the face, the risk of an accident will further increase.

The present invention provides a method for mining power coal that can virtually eliminate coal seam accidents caused by the exposure of dust and projecting gas.

First, with this invented method, air is used inside the pile to supply nitrogen scum, which is essential for workers to breathe! ! Oxygen is supplied from oxygen cylinders carried by each worker individually.In this case, the air in the construction track circle must be replaced with nitrogen gas. Even if there were no explosions of dust or flammable gas, major coal seam accidents could be prevented.

In order to prevent oxygen from getting into the nitrogen gas filled in the tunnel, it is first necessary to ensure that oxygen is released from the workers' breathing system, which is their lifeline. I feel safe. This kind of power is life-sustaining! 1ltj, the normal method of sucking air from an empty cylinder and releasing it to the outside!
In place of the ill, this is an FC-axis device that removes CO2 and hydraulic power from the mixed gas of nitrogen and oxygen that circulates in a closed loop that includes the human body, and replenishes the oxygen consumed by breathing from the w1 element pump. It can be easily realized by using it. Also, if there is a machine in the tunnel that operates with a compressor, it is also necessary to operate it with electric power.

In this way, the release of oxygen in the tunnel is also prevented.Since the consumption of nitrogen sludge is high, once the air in the tunnel is liquified, it is replaced with nitrogen sludge, and after a while, 1 fl of nitrogen sludge is replaced. donation i
Compared to the conventional method, which requires a huge amount of air to be pumped into the shaft, it is more economical in the long run. You can also turn it into an automatic force and use it later in life.

As described above, if this invention is applied, the inside of the tank will be filled with nitrogen scum, and the element will be substantially present and strong, so even if latent hot water such as dust or combustible slag is present, even if it is large. , the risk of explosion is quite strong, and the safety power mining can be compromised. 16 Oxygen cylinders carried by workers can be used for 40 hours, which is significantly longer than the 20 to 70 minutes that air cylinders can be used for, so please be careful not to interfere with work. I'm so ill.

Claims (1)

[Claims] A coal mining method characterized by filling nitrogen gas into the tunnel from the pier to the face, and performing mining operations in this nitrogen gas atmosphere.