摘要：The continuous deposition of coal fine in the well can lead to complex problems, such as pump blockage and reduced capacity. The traditional critical velocity model applicable to rigid spherical particles, such as sand grains and glass beads, finds it difficult to accurately predict the migration behavior of coal fine in the wellbore. Therefore, this study aims to reveal the sedimentation law of coal fine particles, establish a critical velocity prediction model applicable to pulverized coal, and provide a theoretical basis for effectively preventing pump blockage and capacity decline problems. This paper analyzes the particle characteristics of coal fine in different mining areas and conducts experiments on the static settling of coal fine particles and the critical transport velocity. The experimental results showed that the larger the mesh size of coal fine, the lower the static settling velocity of coal fine particles. The critical velocity of coal fine increased with the particle size and concentration of the coal fine particles, as well as with the increase of the pipe column inclination. A new empirical formula for calculating the critical velocity of coal fine particles was derived by considering the effects of the coal fine concentration and pipe inclination. ? 2025 by the authors.

ISSN号：2227-9717

卷、期、页：卷13期7

发表日期：2025-07-18

影响因子：0.000000

期刊分区（SCI为中科院分区）：四区

收录情况：SCI（科学引文索引印刷版）,EI（工程索引）,SCIE（科学引文索引网络版）

发表期刊名称： PROCESSES

参与作者：徐小辉,池明,孟祥燕,刘江,来思俣

通讯作者：邓济平

第一作者：韩国庆

论文类型：期刊论文

论文概要：徐小辉,池明,孟祥燕,邓济平,刘江,韩国庆,来思俣，Research on the Settling and Critical Carrying Velocity of Coal Fine in CBM Wells， PROCESSES，2025，卷13期7

论文题目：Research on the Settling and Critical Carrying Velocity of Coal Fine in CBM Wells