Identifying coal structure using logging data

Abstract

Coal structure, which is important for the mining of CBM, is closely related to the coal reservoir fracture characteristics. This paper calculates the integrity coefficient, stability coefficient and fracture coefficient of coal, and constructs a chart confirming the division standard of the coal structure in the study area. The research results show that coal mechanical parameters can effectively represent coal structure. The integrity and stability coefficients of undeformed coal are the highest, and its fracture coefficient is the lowest; the integrity and stability coefficients of fragmented coal, granulated coal and mylonitized coal gradually decrease, and their fracture coefficients gradually increase. The methods described in the paper can classify coal structure relatively accurately and provide an effective new method for the delimiting of coal structure.