You are on the new improved site. You can view the old site in view-only mode here until June 27, 2026

Filter Results

Search all journals

Enter search terms…

Advanced search

/

About

About Sage
About Sage Journals
Privacy Policy
Terms of Use
Contact Us
Help

Information for

Authors
Editors
Librarians
Researchers
Reviewers
Frequently asked questions

Copyright © 2026 by Sage Publications.京ICP备09090397号-11

Search results

Search results page

Articles (3)

Journals (0)

1-3 of 3 results for Upper protective coal seam

Sort by:

Relevance

Select all

Select all

Sort by:

Relevance

Select article: Distribution law of floor stress during mining of the upper protective coal seam

Open access

Research article

First published 2020-7

Distribution law of floor stress during mining of the upper protective coal seam

Yongjiang Zhang

Science Progress

Select article: Floor failure depth of upper coal seam during close coal seams mining and its novel detection method

Open access

Research article

First published 2018-9

Floor failure depth of upper coal seam during close coal seams mining and its novel detection method

Wei Zhang, Dongsheng Zhang, Dahong Qi [...]

Energy Exploration & Exploitation

Select article: Comprehensive technical support for safe mining in ultra-close coal seams: A case study

Open access

Research article

First published 2021-7

Comprehensive technical support for safe mining in ultra-close coal seams: A case study

Wei Zhang, Jiawei Guo, Kaidi Xie [...]

Energy Exploration & Exploitation

1
10 / page

Article type

Publication date

Subjects

Access