自1990年下半年以来,在广大作者和通讯员同志们的热情支持下,本部不断收到不少有份量有水平的稿件,反映了煤炭战线上很多科研和技术革新成果,有些是生产经验的总结,有些是介绍国内外新技术。这些稿件丰富了刊物内容,提高了刊物质量,开扩了读者视野。由于来稿较多,为扩大刊物信息量,更好地为煤炭生产服务,本刊自今年第2期知每期 Since the second half of 1990, with the enthusiastic support of a large number of authors and correspondents, the Department has continuously received a large number of copies of manuscripts that have reflected the achievements of many scientific research and technological innovations on the coal front and some of the conclusions of production experience Some are introducing new technologies at home and abroad. These manuscripts enriched the content of the publication, raised the quality of the publication and expanded the readers’ horizons. Due to more contributions, in order to expand the volume of publications, to better serve the coal production, the magazine from the second issue of this year to know each