Method for calculating actual mining thickness of underground coal gasification

Abstract

The invention discloses a method for calculating the actual mining thickness of underground coal gasification. The method is suitable for being used in an underground coal gasification construction area. Firstly, the average ash content of a coal seam of a to-be-gasified area is obtained through data or a detected coal sample, then the thickness of ash naturally generated after gasification is calculated through the height of the coal seam, pressure testing is conducted on the ash generated after coal sample simulation gasification, therefore the ash content compression ratio of the to-be-gasified area is obtained through simulation, and finally, according to the coal seam thickness, the coal seam average ash content, the actual overlying rock pressure and the ash content compression ratio, the actual coal underground gasification mining thickness is calculated. The method is simple in calculation steps and more in line with the actual situation, the precision of the overlying strata fracture development height and the surface subsidence prediction result is effectively improved, safe gasification mining of coal resources under buildings and water bodies is guaranteed, and the method has a very strong guiding effect on actual work.

Description

Technical field[0001]The present invention relates to a thick calculation method, in particular to the use of coal underground gasification construction regions, and a coal underground gasification characteristics and a coal underground gasification actual thickness of solid solid waste properties.[0002]technical background[0003]Coal underground gasification (UCG) is a new technique that refers to the multidisciplinary development of clean energy and chemical syngas integrating the establishment, coal, coal, and transformation process. It is an important part of coal-liquid mining. It is my country's advanced energy technology. One of the important directions of the field. At present, the small-scale coal underwater gasification industrial experiments in various processes have successfully achieved success, and lay the foundation for further large-scale experiments and production. However, in the future, underground gasification, production and development of coal underground gasifi...

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Problems solved by technology

Although many scholars have conducted research on the composition of residual solid waste in underground coal gasification, and have also studied the development of internal cracks in unde

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