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| Research and application of array hydraulic cavitation technology for cross-layer drilling in bottom drainage roadway |
| Zhao Jingang1, Liu Lei2 |
| 1. Ventilation Department of Energy Division of Lu 'an Chemical Group, Changzhi 046204, China ; 2. Licun Coal Mine, Lu 'an Chemical Industry Group, Changzhi 046600, China |
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Abstract Hydraulic cavitation technology is an effective method to improve the permeability of coal, improve the extraction efficiency, shorten the time to reach the standard, and achieve cost reduction and efficiency increase. The traditional hydraulic cavitation technology is difficult to achieve a high degree of unity of efficiency, safety and economy. Therefore, in order to further improve the practical value of hydraulic cavitation technology, an innovative array hydraulic cavitation method is proposed. By increasing the number of jet holes for cavitation, the traditional ' multi-hole multi-holes ' is improved to ' multi-holes at the same time ', and the engineering application is carried out. The results show that the array hydraulic cavitation technology can not only improve the effect of gas drainage, but also has the characteristics of high efficiency, safety and economy in cavitation.
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