Underground gas gasification furnace body structure and establishing method

Abstract

The invention provides an underground gas gasification furnace body structure. The underground gas gasification furnace body structure is characterized by comprising a U-shaped well, at least one branched deflecting section and at least one branched horizontal section. The U-shaped well is structurally divided into a straight well section, a butt-point straight well section, a main horizontal section and a main deflecting section. The branched deflecting sections are communicated with the straight well section, the branched horizontal sections are connected with the branched deflecting sections, and the branched horizontal sections are not communicated with the butt-point straight well section of the U-shaped well. An integrated underground gasification furnace is constructed by fully utilizing a U-shaped multi-branch butt joint technology, and an ultra-thick coal seam is divided into different layers for gasification and exploitation. Construction of the furnace is achieved through parallel and stereo arrangement of a main horizontal well and at least one branched horizontal wells, the ultra-thick coal seam is gasified in a layered mode by utilizing the branched horizontal wells, and the furnace construction cost is greatly saved. In addition, the resource waste problem caused by ultra-thick coal seam gasification is fundamentally solved. The invention also provides an underground coal gasification furnace construction method.

Description

technical field [0001] The present invention relates to an underground coal gasification mining technology, in particular to an underground coal gasification furnace body structure and construction method. Background technique [0002] During the conventional mining, transportation, equipment, processing and utilization of coal, it has caused various pollutions to the human living environment, such as ground collapse, sewage and harmful gas emissions, which seriously affect people's health and living environment. At present, the global air pollution is getting more and more serious, and the continuous development of clean energy has become the consensus of all countries in the world. Especially recently, the smoggy weather in many cities in my country has continued, and coal burning pollution has become a criticism of more and more people. The development of clean coal mining and combustion technology is becoming more and more important in my country, a country with large co...

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Problems solved by technology

The existing gasifier furnace types are mainly designed for the occurrence characteristics of the coal seam in the central and eastern regions of my country with a small overall thickness, while the coal-forming conditions in the northwestern region of my country are superior. Taking the Turpan-Hami Basin as an example, its coal accumulation is extensive However, it is strongly characterized by the occurrence of extremely thick coal seams with an average single layer thickness of nearly 100 meters, so applying the existing gasifier furnace type to carry out underground gasification projects in the areas where extremely thick coal seams occur in Northwest my country will cause unfavorable conditions. Regenerated coal resources cause great waste

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