Case Study: Mechanism and Effect Analysis of Presplitting Blasting in Shallow Extra-Thick Coal Seam
The caving effect of the top coal caving is crucial for efficient mining. Using the Yushuling coal mine, Xinjiang province, China, as a case study, the coal and rock physical and mechanical parameters, such as the compressive, tensile, and shear strength values and hardness of the top coal and roof...
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| Veröffentlicht in: | Archives of mining sciences = Archiwum górnictwa 2022-01, Vol.67 (3), p.381 |
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| creator | Sun, Qiang Shan, Chengfang Wu, Zhongya Wang, Yunbo |
| description | The caving effect of the top coal caving is crucial for efficient mining. Using the Yushuling coal mine, Xinjiang province, China, as a case study, the coal and rock physical and mechanical parameters, such as the compressive, tensile, and shear strength values and hardness of the top coal and roof rock, were determined. The analysis of the effect of different factors on the blasting presplitting process was numerically simulated, and the optimal parameters of blast drilling were identified. Three presplit boreholes were implemented: in the workface, the workface’s advance area, and the two roadway roofs in the workface’s advance area. The optimal blasting drilling parameters and charge structure were designed. The field test results in the mine under study indicated that the top coal recovery rate of the 110501 fully mechanised top coal caving face was improved twice (from 40 to more than 80%), and an effective blasting presplitting was achieved. The proposed blasting presplitting method has an important guiding significance for fully mechanised top coal caving mining in Xinjiang and similar mining areas. |
| doi_str_mv | 10.24425/ams.2022.142406 |
| format | Article |
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Using the Yushuling coal mine, Xinjiang province, China, as a case study, the coal and rock physical and mechanical parameters, such as the compressive, tensile, and shear strength values and hardness of the top coal and roof rock, were determined. The analysis of the effect of different factors on the blasting presplitting process was numerically simulated, and the optimal parameters of blast drilling were identified. Three presplit boreholes were implemented: in the workface, the workface’s advance area, and the two roadway roofs in the workface’s advance area. The optimal blasting drilling parameters and charge structure were designed. The field test results in the mine under study indicated that the top coal recovery rate of the 110501 fully mechanised top coal caving face was improved twice (from 40 to more than 80%), and an effective blasting presplitting was achieved. The proposed blasting presplitting method has an important guiding significance for fully mechanised top coal caving mining in Xinjiang and similar mining areas.</description><identifier>ISSN: 0860-7001</identifier><identifier>EISSN: 1689-0469</identifier><identifier>DOI: 10.24425/ams.2022.142406</identifier><language>eng</language><publisher>Warsaw: Polish Academy of Sciences</publisher><subject>Blasting ; Boreholes ; Case studies ; Coal ; Coal mines ; Coal mining ; Compressive strength ; Drilling ; Field tests ; Mechanical properties ; Mining ; Parameter identification ; Parameters ; Presplitting ; Rocks ; Shear strength ; Water hardness ; Work face</subject><ispartof>Archives of mining sciences = Archiwum górnictwa, 2022-01, Vol.67 (3), p.381</ispartof><rights>2022. This work is licensed under https://creativecommons.org/licenses/by-sa/4.0/ (the “License”). 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Using the Yushuling coal mine, Xinjiang province, China, as a case study, the coal and rock physical and mechanical parameters, such as the compressive, tensile, and shear strength values and hardness of the top coal and roof rock, were determined. The analysis of the effect of different factors on the blasting presplitting process was numerically simulated, and the optimal parameters of blast drilling were identified. Three presplit boreholes were implemented: in the workface, the workface’s advance area, and the two roadway roofs in the workface’s advance area. The optimal blasting drilling parameters and charge structure were designed. The field test results in the mine under study indicated that the top coal recovery rate of the 110501 fully mechanised top coal caving face was improved twice (from 40 to more than 80%), and an effective blasting presplitting was achieved. The proposed blasting presplitting method has an important guiding significance for fully mechanised top coal caving mining in Xinjiang and similar mining areas.</description><subject>Blasting</subject><subject>Boreholes</subject><subject>Case studies</subject><subject>Coal</subject><subject>Coal mines</subject><subject>Coal mining</subject><subject>Compressive strength</subject><subject>Drilling</subject><subject>Field tests</subject><subject>Mechanical properties</subject><subject>Mining</subject><subject>Parameter identification</subject><subject>Parameters</subject><subject>Presplitting</subject><subject>Rocks</subject><subject>Shear strength</subject><subject>Water hardness</subject><subject>Work face</subject><issn>0860-7001</issn><issn>1689-0469</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2022</creationdate><recordtype>article</recordtype><sourceid>BENPR</sourceid><recordid>eNotj8tOwzAURC0EElXpnqUl1il-x2FXovKQikBqWVc3zjU1uEmJXUH_ngpYzazOnCHkkrOpUEroa9imqWBCTLkSipkTMuLGVgVTpjolI2YNK0rG-DmZpBQaxktpJTd8RFwNCeky79vDDX1Ct4EupC2FrqVz79FlOusgHlJItPf0ZcC0iyHn0L3R2wjpt4SOLjcQY_9F5995gGK1Ce6D1j1EukTYXpAzDzHh5D_H5PVuvqofisXz_WM9WxQ7IXQuvOKlrlCaRhgU2jTGgHNtKQW2ziqLvtVWY8m9F75BV1mDxjluS5DAPMgxufrj7ob-c48pr9_7_XDUT2txvCutPi7IH7p9WUQ</recordid><startdate>20220101</startdate><enddate>20220101</enddate><creator>Sun, Qiang</creator><creator>Shan, Chengfang</creator><creator>Wu, Zhongya</creator><creator>Wang, Yunbo</creator><general>Polish Academy of Sciences</general><scope>7QH</scope><scope>7TN</scope><scope>7UA</scope><scope>8FE</scope><scope>8FG</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>BKSAR</scope><scope>C1K</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>F1W</scope><scope>GNUQQ</scope><scope>H96</scope><scope>H97</scope><scope>HCIFZ</scope><scope>KB.</scope><scope>L.G</scope><scope>PATMY</scope><scope>PCBAR</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PYCSY</scope></search><sort><creationdate>20220101</creationdate><title>Case Study: Mechanism and Effect Analysis of Presplitting Blasting in Shallow Extra-Thick Coal Seam</title><author>Sun, Qiang ; 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Using the Yushuling coal mine, Xinjiang province, China, as a case study, the coal and rock physical and mechanical parameters, such as the compressive, tensile, and shear strength values and hardness of the top coal and roof rock, were determined. The analysis of the effect of different factors on the blasting presplitting process was numerically simulated, and the optimal parameters of blast drilling were identified. Three presplit boreholes were implemented: in the workface, the workface’s advance area, and the two roadway roofs in the workface’s advance area. The optimal blasting drilling parameters and charge structure were designed. The field test results in the mine under study indicated that the top coal recovery rate of the 110501 fully mechanised top coal caving face was improved twice (from 40 to more than 80%), and an effective blasting presplitting was achieved. 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| source | Alma/SFX Local Collection |
| subjects | Blasting Boreholes Case studies Coal Coal mines Coal mining Compressive strength Drilling Field tests Mechanical properties Mining Parameter identification Parameters Presplitting Rocks Shear strength Water hardness Work face |
| title | Case Study: Mechanism and Effect Analysis of Presplitting Blasting in Shallow Extra-Thick Coal Seam |
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