Cooperative Control Mechanism of Long Flexible Bolts and Blasting Pressure Relief in Hard Roof Roadways of Extra-Thick Coal Seams: A Case Study

Cooperative Control Mechanism of Long Flexible Bolts and Blasting Pressure Relief in Hard Roof Roadways of Extra-Thick Coal Seams: A Case Study

The higher strength of a hard roof leads to higher coal pressure during coal mining, especially under extra-thick coal seam conditions. This study addresses the hard roof control problem for extra-thick coal seams using the air return roadway 4106 (AR 4106) of the Wenjiapo Coal Mine as a case study....

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Bibliographic Details
Main Authors: Zhe Xiang, Nong Zhang, Zhengzheng Xie, Feng Guo, Chenghao Zhang
Format: Article
Language:English
Published: MDPI AG 2021-04-01
Series:Applied Sciences
Subjects:
extra-thick coal seam
hard roof
deep-hole pre-splitting blasting
flexible long bolt
in-situ observation
Online Access:https://www.mdpi.com/2076-3417/11/9/4125

Internet

https://www.mdpi.com/2076-3417/11/9/4125

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