An underground gasification method for protecting coal pillars in coal mine sections

Abstract

The invention discloses an underground gasification method for protecting a coal pillar in a section of a coal mine. 3) Drill holes at the left end of the section protection coal pillar; 4) Ignite at the left end of the section protection coal pillar; 6) The oxidant produces gas through physical and chemical reactions in the section protection coal pillar; 7) The generated gas enters the mining area through the upper section transportation roadway and is transported up the mountain; 8) The generated gas passes through the mining area. 9) The generated gas enters the wind shaft through the return air alley and is collected. The invention uses the original roadway during coal mining as a gasification channel to directly gasify the section protection coal pillars that are difficult to mine, provides a new idea for the mining of section protection coal pillars, and provides a method for coal mine underground gasification new method.

Description

technical field [0001] The invention relates to the technical field of coal mining, in particular to an underground gasification method for protecting coal pillars in coal mine sections. Background technique [0002] The total reserves of coal resources in my country are relatively large, but our country has a large population, and the per capita possession of coal resources is very small, and our country is a country rich in coal, poor in oil and little in gas. For now, coal resources still occupy a dominant position in our country. With the mining of coal resources, the conditions of coal mining in my country are becoming more and more complicated. At present, in the same mining area, multiple sections are often divided. In order to ensure that the next section is not affected by the mining of the previous section, a protective coal pillar is often left between the two sections. If the section protective coal pillars are mined out by conventional methods, the overlying str...

AI Technical Summary

Problems solved by technology

This is essentially a new mining system, with a large amount of engineering, high cost, long infrastructure construction period, and the exploration of site conditions is often not clear enough, which is easily affected by geological structures

At present, most of them are used as my country's strategic reserve technology, and it is difficult to achieve quick profits

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