巷道与其上部开采煤层合理垂距的影响因素分析

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1008-8881|30|1|18-20

ISSN: 1008-8881

Source: 山西能源学院学报, Vol.30, Iss.1, 2017-01, pp. : 18-20

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

Previous Menu Next

Abstract