采面金属顶梁的发展及更新  

Development and Renewal of Metal Roof Bar of Coal Face

机构地区：[1]煤炭科学研究总院北京开采所

出　　处：《矿山压力与顶板管理》1990年第3期25-28,72-73,共4页Ground Pressure and Strata Control

摘　　要：本文介绍了一种新型π型钢顶梁的特性,它与HDJA顶梁相比具有许多优点,推广使用π型钢顶梁具有很高的经济效益。The advantages and shortcomingsof the HDJA metal linked roof which is widely uti-lized in our country is analyzed, and the new π-profile roof bar is introduced in this paper. Com-pared with the former, the π-profile roof bar hasthe advantage of the structure, strength, stability,workability, etc.. Therefore, it would obtain eco-nomic benefits to popularize the new roof bar.

关 键 词：煤矿 采面支护 金属顶梁 发展 

分 类 号：TD355.2[矿业工程—矿井建设]