Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting
Joint Authors
Ma, Zhanguo
Gong, Peng
Cheng, Shixing
Chen, Yongheng
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-10-28
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
For the problem that the hard roof causes wider end-mining coal pillar, and the roadway is greatly affected by mining, this paper took Shanxi Luning Coal Mine as the engineering background; based on the stress distribution characteristics of the coal pillar, the calculation method of the limit end-mining coal pillar size was given; considering the formation conditions and transmission forms of the advanced abutment stress, a method combining presplitting and deep hole blasting was proposed to weaken the advanced abutment stress.
The numerical simulation was used to analyze the stress distribution of coal pillars, which was verified by on-site industrial tests.
The results showed that the presplitting can achieve the blocking of stress.
The closer it is to the peak of the abutment stress, the better the blocking effect.
Deep hole blasting can weaken the source of the advanced abutment stress and reduce the peak of abutment stress.
With the combination of the two blasting methods, the end-mining coal pillar size of Luning Coal Mine can be reduced to 60 m.
The method combining presplitting and deep hole blasting can effectively reduce the end-mining coal pillar size and reduce the impact of mining on the deformation of the dip roadway.
American Psychological Association (APA)
Gong, Peng& Chen, Yongheng& Ma, Zhanguo& Cheng, Shixing. 2020. Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting. Advances in Civil Engineering،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1123783
Modern Language Association (MLA)
Gong, Peng…[et al.]. Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting. Advances in Civil Engineering No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1123783
American Medical Association (AMA)
Gong, Peng& Chen, Yongheng& Ma, Zhanguo& Cheng, Shixing. Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting. Advances in Civil Engineering. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1123783
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1123783