Technology of CO_2 sequestration for developing deep coal bed methane in China;

Based on the principle of grey association analysis,the present paper has put forward a fairly practical and readily programmed cluster method—grey association cluster method,and employed this method to demarcate coal beds and gas beds,discriminate between coal-produced gas bed,oil bed and water bed ,and make lithostratigraphic classification.

The main geological factors which influenced top coal caving and broken characteristic contain:the strength of coal,the mining depth of coal seams,the features of coal seams with middle band,the thickness of coal seam,the fissures of coal,the roof features of coal-bed,etc.

Measures for preventing and controlling gas in deep coal bed;

The deep coal bed in Xingbei is one of the best targets to exploit availably with large reserve and medium burial depth.

In the paper,the mechanical mechanism of gas Emission is revealed by the force analysis of surrounding coal of deep vertical shaft and the research on ground pressure and gas pressure during vertical shaft crossing deep coal bed.