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Method for underground coal gasification for gasifier channel establishment

A technology of coal gasification and gasification furnace, which is applied in coal gasification, underground mining, construction, etc., can solve the problem of success rate of connection between holes, abandoned coal mines with no economic mining value, etc., and achieve high success rate of docking and low cost Effect

Active Publication Date: 2014-06-25
GUIZHOU PANJIANG COAL BED GAS DEV UTILIZATION
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies, mainly to solve the problem of the success rate of connection between holes, and is especially suitable for abandoned coal mines with no economic mining value.

Method used

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  • Method for underground coal gasification for gasifier channel establishment
  • Method for underground coal gasification for gasifier channel establishment

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Embodiment Construction

[0022] see figure 1 with figure 2 , a kind of underground coal gasification method that the present invention proposes to construct the gasifier channel, its process steps are as follows:

[0023] 1. Drill injection holes on the ground in the gasification operation area. According to the data of the drilling in the mining area and the above-mentioned actual drilling, choose a thicker and stable coal seam;

[0024] 2. Under the coal mine, use the directional follow-up drilling technology to connect the ground injection hole, and then continue drilling in the coal seam along the connection direction to form a horizontal hole gasification channel supported by a combustible casing;

[0025] 3. Use underground fracturing equipment in coal mines to implement staged fracturing operations for horizontal holes;

[0026] 4. After the fracturing operation is completed, adopt the horizontal hole sealing technology to seal the hole between the downhole drilling and the injection hole wi...

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Abstract

The invention belongs to the technical field of underground coal gasification, and particularly relates to a method for underground coal gasification for gasifier channel establishment. A main injection hole, an auxiliary injection hole, a main air outlet, an auxiliary air outlet, a water discharging hole, a crushing zone, horizontal holes, a hole packer and a temperature and pressure monitoring instrument are involved in the method. The ground coal mine face serves as a base point, the injection holes and the air outlets are arranged in a line, and the alignment direction of the injection holes and the air outlets is identical to that of the underground horizontal holes. A gasifier channel is formed through the method that underground drilled holes are in butt joint with the coal bed sections of the ground injection holes. The method has the advantages of being low in cost, high in success rate of butt joint, and particularly suitable for abandoned mines without economic exploitation value.

Description

technical field [0001] The invention belongs to the technical field of underground coal gasification, and in particular relates to an underground coal gasification method for constructing a gasification furnace channel. Background technique [0002] Underground coal gasification technology can provide a clean and effective energy source. The coal seams used for gasification are those coal seams that cannot be mined or uneconomical by conventional mining techniques, which are completely different from the current production techniques such as mechanized coal mining and explosive blasting coal mining. It controls the chemical reaction of coal combustion underground through related equipment and operating systems, and directly converts coal underground into secondary clean energy output. Underground coal gasification is also a change in production and transportation methods. It can enable people to use clean gas through pipeline collection and transportation, and can also use c...

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Application Information

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IPC IPC(8): E21B43/295
Inventor 叶姜杨世梁邓鸢
Owner GUIZHOU PANJIANG COAL BED GAS DEV UTILIZATION
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