Coal anaerobic mining method

A mining method and coal mining technology, which is applied in ground mining, earth drilling, underground mining, etc., can solve the problems of inability to continue to develop deep resources and high production costs, and achieve the effect of reducing the risk of gas explosion, improving economy, and safe recovery

Inactive Publication Date: 2017-08-29
LIAONING TECHNICAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At the same time, with the deepening of the development of coal resources, the existing ventilation technology cannot meet the production needs of future mines, and the production cost will become higher and higher, so coal enterprises cannot continue to develop deep resources

Method used

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Effect test

Embodiment 1

[0043] A kind of coal anaerobic mining method, the schematic diagram of mine layout state in the process of coal anaerobic mining is as follows figure 1 shown, figure 1 The cross-sectional view of A-A in the figure 2 As shown, the schematic diagram of the fixed air supply chamber is shown in Fig. image 3 shown, including the following steps:

[0044] Step 1, Mine Seal:

[0045] Four sealing doors 8 are set at the entrances of the main shaft 1 and the auxiliary shaft 2 respectively. The distance between the sealing doors 8 is 15m. The four sealing doors of the main shaft 1 and the auxiliary shaft 2 form 3 cabins, respectively It is the first cabin, the second cabin and the third cabin, the first cabin is the aerobic cabin A, the second cabin is the transition cabin B, and the third cabin is the anaerobic cabin C, so that the mine is closed to a sealed state to ensure the atmosphere inside the mine. The environment is isolated from the ground atmosphere;

[0046] Step 2, co...

Embodiment 2

[0053] A kind of coal anaerobic mining method, the schematic diagram of mine layout state in the process of coal anaerobic mining is as follows figure 1 shown, figure 1 The cross-sectional view of A-A in the figure 2 As shown, the schematic diagram of the fixed air supply chamber is shown in Fig. image 3 shown, including the following steps:

[0054] Step 1, Mine Seal:

[0055] Four sealed doors 8 are set at the entrances of the main shaft 1 and the auxiliary shaft 2 respectively, and the distance between the sealed doors 8 is 25m. The four sealed doors of the main shaft 1 and the auxiliary shaft 2 form three cabins, respectively It is the first cabin, the second cabin and the third cabin, the first cabin is the aerobic cabin A, the second cabin is the transition cabin B, and the third cabin is the anaerobic cabin C, so that the mine is closed to a sealed state to ensure the atmosphere inside the mine. The environment is isolated from the ground atmosphere;

[0056] Ste...

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Abstract

The invention relates to a coal anaerobic mining method which comprises the following steps: step 1, mine sealing: each of a main shaft and an auxiliary shaft of a mine is sealed to a sealed state, so that an atmospheric environment inside the mine is isolated from a ground atmosphere; step 2, coal anaerobic mining: oxygen concentration and gas concentration in the mine are monitored in real time, underground mining personnel wears a respirator to start with coal mining when the oxygen concentration inside the mine is reduced to be 5 percent or lower, and the gas concentration is kept above the upper limit of an explosion limit, and in the mining process, arranged oxygen concentration monitoring probes and an inert gas injection system are matched to monitor the oxygen concentration in real time, so that the oxygen concentration is controlled to be 5 percent or lower, and the coal mining is finished. The coal anaerobic mining method provided by the invention is suitable for various types of mines, can completely avoid the occurrence of underground gas explosion, coal dust explosion, underground fire and other major safety accidents and effectively guarantee personnel safety; the operation method is simple, and the initial investment cost and the mine production cost are greatly reduced; meanwhile, the greenhouse gas emission is reduced, so that the environment is protected.

Description

Technical field: [0001] The invention belongs to the technical field of coal mining, and in particular relates to an oxygen-free coal mining method. Background technique: [0002] Coal accounts for about 74% of the primary commodity energy produced and consumed in my country, which provides 78% of power generation energy, 70% of chemical raw materials and 60% of commercial energy for civilian use. The coal reserves that can be mined in open-pit in my country only account for 7.5%, and most coal mining needs to be carried out through mine mining. However, the quality of mine mining conditions is inversely proportional to the amount of gas contained in coal mines. The proportion of gas contained in coal mines in my country is high. High gas and gas outburst mines account for more than 40%, and the safety production conditions for coal mining are very poor due to coal occurrence conditions. In coal mining, gas explosions, coal and gas outbursts, fires and other major accidents ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/18
CPCE21C41/18
Inventor 洪林高大猛王继仁郑丹杜元红
Owner LIAONING TECHNICAL UNIVERSITY
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