Influencing factors of coal elastic parameters based on the generalized gassmann equation: a case study in yuwang colliery, eastern yunnan province

Abstract Coal elastic parameters are an important index reflecting the material composition and porosity, which can be used to guide reservoir evaluation safe mining of coal coalbed methane (CBM). In this study, samples collected from seams #2, #3, #7 + 8, #9 in Yuwang colliery, eastern Yunnan, were studied, influences organic matter, ash content porosity on investigated. The results show that negatively correlated with matter positively content. This means bulk modulus primary wave (P‐wave) velocity decrease a gradual increase or main reason for is typically higher than coal. When gradually increases, contribution equivalent whereas pores decreases. P‐wave target seam was fitted based generalized Gassmann equation. calculation consistent observations relative error within 7%. According distribution behavior parameters, provides adequate data support prediction gas mines ensures green resources. article protected by copyright. All rights reserved