Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting
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-m...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8842818 |
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| author | Peng Gong Yongheng Chen Zhanguo Ma Shixing Cheng |
| author_facet | Peng Gong Yongheng Chen Zhanguo Ma Shixing Cheng |
| author_sort | Peng Gong |
| collection | DOAJ |
| description | 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. |
| format | Article |
| id | doaj-art-42fb84bad775491e9aa262142729211e |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-42fb84bad775491e9aa262142729211e2025-02-03T06:46:59ZengWileyAdvances in Civil Engineering1687-80861687-80942020-01-01202010.1155/2020/88428188842818Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole BlastingPeng Gong0Yongheng Chen1Zhanguo Ma2Shixing Cheng3State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, Jiangsu, ChinaFor 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.http://dx.doi.org/10.1155/2020/8842818 |
| spellingShingle | Peng Gong Yongheng Chen Zhanguo Ma Shixing Cheng Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting Advances in Civil Engineering |
| title | Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting |
| title_full | Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting |
| title_fullStr | Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting |
| title_full_unstemmed | Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting |
| title_short | Study on Stress Relief of Hard Roof Based on Presplitting and Deep Hole Blasting |
| title_sort | study on stress relief of hard roof based on presplitting and deep hole blasting |
| url | http://dx.doi.org/10.1155/2020/8842818 |
| work_keys_str_mv | AT penggong studyonstressreliefofhardroofbasedonpresplittinganddeepholeblasting AT yonghengchen studyonstressreliefofhardroofbasedonpresplittinganddeepholeblasting AT zhanguoma studyonstressreliefofhardroofbasedonpresplittinganddeepholeblasting AT shixingcheng studyonstressreliefofhardroofbasedonpresplittinganddeepholeblasting |