Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysis
In order to verify the effect of different blasting methods on the development of rock fissures and roof caving, a study on deep-hole presplitting blasting technology for hard roof was carried out in I010203 working face of Kuanggou coal mine, theoretical analysis, numerical simulation, field test a...
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| Format: | Article |
| Language: | zho |
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Editorial Department of Coal Science and Technology
2023-03-01
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| Series: | Meitan kexue jishu |
| Subjects: | |
| Online Access: | http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2021-0097 |
| _version_ | 1797816754164989952 |
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| author | ZHAO Zhipeng YAN Ruibing CONG Junyu |
| author_facet | ZHAO Zhipeng YAN Ruibing CONG Junyu |
| author_sort | ZHAO Zhipeng |
| collection | DOAJ |
| description | In order to verify the effect of different blasting methods on the development of rock fissures and roof caving, a study on deep-hole presplitting blasting technology for hard roof was carried out in I010203 working face of Kuanggou coal mine, theoretical analysis, numerical simulation, field test and monitoring analysis are used to analyze the influence of multi-roadway blasting type on rock burst.According to the different blasting position and sequence, the engineering types are divided, and 5 types of blasting are put forward, and 3 types are simulated and analyzed.The following conclusions are drawn: ① according to theoretical analysis, the parameters of deep hole presplitting blasting are determined. The Height of roof treatment is 40 m, the distance between holes is 10 m, and the blasting holes are arranged in a fan shape; ② analyzing and comparing the development of the fracture degree of different schemes, the fracture range of the inner fracture of coal is obviously larger than that of the Rock, and the volume of the "anti-triangle" blasting is much larger than that of the other blasting types; ③ The oblique shape further intensifies the coal stress concentration and roof activity intensity in the microseismic event gathering area in the non-blasting area, and the occurrence frequency of large energy events increases; The “one-shape” can reduce the stress concentration degree of the coal body in the agglomeration area of microseismic events in the non-blasting area, but the elimination and transfer effect of the agglomeration area is not obvious. The “inverse triangle” effectively reduces the roof activity intensity and coal stress concentration degree in the blasting area and non-blasting area, reduces the occurrence frequency of large energy events, determines the optimal advance deep hole pre-splitting blasting sequence, and reduces the risk of rock burst in the working face. |
| first_indexed | 2024-03-13T08:42:23Z |
| format | Article |
| id | doaj.art-c2b289f386384f758027ca5382879ac9 |
| institution | Directory Open Access Journal |
| issn | 0253-2336 |
| language | zho |
| last_indexed | 2024-03-13T08:42:23Z |
| publishDate | 2023-03-01 |
| publisher | Editorial Department of Coal Science and Technology |
| record_format | Article |
| series | Meitan kexue jishu |
| spelling | doaj.art-c2b289f386384f758027ca5382879ac92023-05-30T08:54:35ZzhoEditorial Department of Coal Science and TechnologyMeitan kexue jishu0253-23362023-03-01513687610.13199/j.cnki.cst.2021-00972021-0097Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysisZHAO Zhipeng0YAN Ruibing1CONG Junyu2CHN Energy Group Xinjiang energy CO., Ltd., Urumqi 830027 ChinaCHN Energy Group Xinjiang energy CO., Ltd., Urumqi 830027 ChinaGdem Technology , Beijing, Co., Ltd., Beijing 100190, ChinaIn order to verify the effect of different blasting methods on the development of rock fissures and roof caving, a study on deep-hole presplitting blasting technology for hard roof was carried out in I010203 working face of Kuanggou coal mine, theoretical analysis, numerical simulation, field test and monitoring analysis are used to analyze the influence of multi-roadway blasting type on rock burst.According to the different blasting position and sequence, the engineering types are divided, and 5 types of blasting are put forward, and 3 types are simulated and analyzed.The following conclusions are drawn: ① according to theoretical analysis, the parameters of deep hole presplitting blasting are determined. The Height of roof treatment is 40 m, the distance between holes is 10 m, and the blasting holes are arranged in a fan shape; ② analyzing and comparing the development of the fracture degree of different schemes, the fracture range of the inner fracture of coal is obviously larger than that of the Rock, and the volume of the "anti-triangle" blasting is much larger than that of the other blasting types; ③ The oblique shape further intensifies the coal stress concentration and roof activity intensity in the microseismic event gathering area in the non-blasting area, and the occurrence frequency of large energy events increases; The “one-shape” can reduce the stress concentration degree of the coal body in the agglomeration area of microseismic events in the non-blasting area, but the elimination and transfer effect of the agglomeration area is not obvious. The “inverse triangle” effectively reduces the roof activity intensity and coal stress concentration degree in the blasting area and non-blasting area, reduces the occurrence frequency of large energy events, determines the optimal advance deep hole pre-splitting blasting sequence, and reduces the risk of rock burst in the working face.http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2021-0097rock burstdeep hole pre splitting blastingblasting typemicroseismic monitoring |
| spellingShingle | ZHAO Zhipeng YAN Ruibing CONG Junyu Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysis Meitan kexue jishu rock burst deep hole pre splitting blasting blasting type microseismic monitoring |
| title | Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysis |
| title_full | Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysis |
| title_fullStr | Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysis |
| title_full_unstemmed | Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysis |
| title_short | Advanced deep hole pre - splitting blasting of hard roof type and effect evaluation analysis |
| title_sort | advanced deep hole pre splitting blasting of hard roof type and effect evaluation analysis |
| topic | rock burst deep hole pre splitting blasting blasting type microseismic monitoring |
| url | http://www.mtkxjs.com.cn/article/doi/10.13199/j.cnki.cst.2021-0097 |
| work_keys_str_mv | AT zhaozhipeng advanceddeepholepresplittingblastingofhardrooftypeandeffectevaluationanalysis AT yanruibing advanceddeepholepresplittingblastingofhardrooftypeandeffectevaluationanalysis AT congjunyu advanceddeepholepresplittingblastingofhardrooftypeandeffectevaluationanalysis |