Method for obtaining state of underground gasification burning face

A technology of underground gasification and working state, applied in coal gasification, underground mining, earthwork drilling, etc., can solve the problems of low detection precision and accuracy, and great influence of radon gas.

Inactive Publication Date: 2014-12-10
ENN COAL GASIFICATION MINING
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Problems solved by technology

However, the radon measurement method can only obtain the two-dimensional temperature field of the combustion face in the underground gasifier, and the migration of radon gas is greatly affected by the climate, so its detection accuracy and accuracy are low

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  • Method for obtaining state of underground gasification burning face
  • Method for obtaining state of underground gasification burning face
  • Method for obtaining state of underground gasification burning face

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Embodiment Construction

[0037] The method for obtaining the state of the underground gasification and combustion working face in the embodiment of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0038] An embodiment of the present invention is a method for obtaining the state of an underground gasification and combustion working face, including: the arrangement of micro-seismic monitoring wells, at least one micro-seismic monitoring well is provided; the installation of a micro-seismic monitoring system, the micro-seismic monitoring system includes three components Geophone and the main box connected to it through cables; signal extraction, identification and positioning of micro-seismic events; determination and analysis of effective source points; acquisition of three-dimensional surface state of underground gasification combustion face.

[0039] In the process of underground coal gasification, because the coal rock is heterogeneous, under con...

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Abstract

The invention discloses a method for obtaining a state of an underground gasification burning face, and belongs to the technical field of underground gasification burning monitoring. The method includes the steps of arranging at least one microseism monitoring well; installing a microseism monitoring system, wherein the microseism monitoring system comprises a three-component detector and a mainframe box connected with the three-component detector through a cable; carrying out signal extraction, recognition and positioning of a microseism event; determining and analyzing a valid seismic source point; obtaining the state of the three-dimension surface of the underground gasification burning face. Compared with other monitoring means for the state of the underground gasification burning face, the method is not affected by environmental temperature, and the high-precision working state of the three-dimension surface of the underground gasification burning face and the state evolution rule can be achieved.

Description

technical field [0001] The invention relates to a method for obtaining the state of an underground gasification combustion face, and belongs to the technical field of monitoring for underground coal gasification production. Background technique [0002] Underground coal gasification refers to the technology of converting underground coal into combustible gas in situ through thermochemical reactions. It is a new technology that integrates the three major processes of well construction, coal mining and conversion, and multidisciplinary development of energy and chemical raw materials. [0003] In the process of underground coal gasification, due to the influence of geological structure, coal quality, fracture direction, overlying strata characteristics, underground aquifer and other factors, and the specific underground conditions are not directly visible, it is difficult to accurately grasp the gasification process. Technical parameters closely related to the gasification coa...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21B49/00E21B43/295
Inventor 梁桂玲
Owner ENN COAL GASIFICATION MINING
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