Abstract
Improving the safety and stability of composite roof in deep roadway is the strong guarantee for safe mining and sustainable development of coal mines. With three roadways of different composite roofs in Hulusu Coal Mine and Menkeqing Coal Mine as the research background, this paper explores the mechanical properties and energy dissipation law of coal-rock structures with different height ratios from the perspective of energy release and dissipation through lab experiments. The results indicate that the key to the stability of coal-rock structures lies in maintaining relatively low dissipation energy. Based on experimental results and the energy balance theory, two support principles were put forward and applied to experimental roadways. The field monitoring results show that the anchoring force on different composite roof displays different characteristics, proving that the work done by the support can adjust timely to the energy release and conversion so as to improve the safety and stability of roadways with different composite roofs. This study provides a reference for the deformation control in deep roadways with composite roofs under similar conditions.
Recommended Citation
Z. Xie et al., "Study on Safety Control of Composite Roof in Deep Roadway based on Energy Balance Theory," Sustainability, vol. 11, no. 13, article no. 3688, MDPI, Jul 2019.
The definitive version is available at https://doi.org/10.3390/su11133688
Department(s)
Mining Engineering
Keywords and Phrases
Coal-rock structure; Composite roof; Energy balance; Mechanical property; Safety control; Support principle
International Standard Serial Number (ISSN)
2071-1050
Document Type
Article - Journal
Document Version
Final Version
File Type
text
Language(s)
English
Rights
© 2019 The Author(s), All rights reserved.
Creative Commons Licensing
This work is licensed under a Creative Commons Attribution 4.0 License.
Publication Date
01 Jul 2019
Comments
The authors are grateful to the staff at the Hulusu Coal Mine and Menkeqing Coal Mine for their assistance during the field measurements. This work is financially supported by the Outstanding Innovation Scholarship for Doctoral Candidate of "Double First Rate" Construction Disciplines of CUMT.