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.
Abstract