The text explains the terra, coal reserves, status of generative construction and utilizing approaches of jet coal in Yima diggings, which provides valuable technologic information and data for coal consumers.

• 摘要系统地阐述了义马矿区长焰煤的地质、煤炭储量、生产建设情况，煤质特征及其利用途径。为广大煤炭用户提供了有重要价值的技术资料和数据。