Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting
Air is commonly used as the noncoupling borehole medium in directional slot blasting where the quasi-static pressure is small, the energy utilization rate of the explosive is low, and the breaking efficiency of the coal-rock mass is not high. This study investigates the effect of quasi-static pressu...
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| Format: | Article |
| Language: | English |
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Wiley
2018-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2018/6584634 |
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| _version_ | 1849308297178382336 |
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| author | Chengwei Liu Binwei Xia Yiyu Lu Yugang Gao |
| author_facet | Chengwei Liu Binwei Xia Yiyu Lu Yugang Gao |
| author_sort | Chengwei Liu |
| collection | DOAJ |
| description | Air is commonly used as the noncoupling borehole medium in directional slot blasting where the quasi-static pressure is small, the energy utilization rate of the explosive is low, and the breaking efficiency of the coal-rock mass is not high. This study investigates the effect of quasi-static pressure on crack propagation in closed-field blasting. Crack length propagation in the quasi-static pressure stage accounts for more than 60% of the total crack length. Water is therefore proposed as the noncoupling medium of the slotting borehole to increase the quasi-static pressure. A series of experiments was performed to investigate and compare quasi-static pressures generated using noncoupled water-medium blasting and noncoupled air-medium blasting. The experimental results show that the quasi-static pressure is 37–46 times larger in water-medium blasting than in the air-medium case. The experimental measurements show good agreement with theoretical analysis. The results show that the energy utilization rate of the explosives in the hydraulic slotting blasting is high with a notable energy storage effect, and that the fracturing range can be significantly increased. Additionally, fracture by directional blasting using this approach can be more controllable. |
| format | Article |
| id | doaj-art-14e073f2036e4fd49baef59f0fdfe430 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-14e073f2036e4fd49baef59f0fdfe4302025-08-20T03:54:29ZengWileyShock and Vibration1070-96221875-92032018-01-01201810.1155/2018/65846346584634Experimental Study on Quasi-Static Pressure of Slot Hydraulic BlastingChengwei Liu0Binwei Xia1Yiyu Lu2Yugang Gao3State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaState Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, ChinaAir is commonly used as the noncoupling borehole medium in directional slot blasting where the quasi-static pressure is small, the energy utilization rate of the explosive is low, and the breaking efficiency of the coal-rock mass is not high. This study investigates the effect of quasi-static pressure on crack propagation in closed-field blasting. Crack length propagation in the quasi-static pressure stage accounts for more than 60% of the total crack length. Water is therefore proposed as the noncoupling medium of the slotting borehole to increase the quasi-static pressure. A series of experiments was performed to investigate and compare quasi-static pressures generated using noncoupled water-medium blasting and noncoupled air-medium blasting. The experimental results show that the quasi-static pressure is 37–46 times larger in water-medium blasting than in the air-medium case. The experimental measurements show good agreement with theoretical analysis. The results show that the energy utilization rate of the explosives in the hydraulic slotting blasting is high with a notable energy storage effect, and that the fracturing range can be significantly increased. Additionally, fracture by directional blasting using this approach can be more controllable.http://dx.doi.org/10.1155/2018/6584634 |
| spellingShingle | Chengwei Liu Binwei Xia Yiyu Lu Yugang Gao Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting Shock and Vibration |
| title | Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting |
| title_full | Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting |
| title_fullStr | Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting |
| title_full_unstemmed | Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting |
| title_short | Experimental Study on Quasi-Static Pressure of Slot Hydraulic Blasting |
| title_sort | experimental study on quasi static pressure of slot hydraulic blasting |
| url | http://dx.doi.org/10.1155/2018/6584634 |
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