Abstract
In order to rescue a trapped miner and clean out roadways quickly in a high gas mine shaft after a mining mishap, a special portable cold-cutting equipment is needed. the main technology parameters were calculated according to the advanced cold-cutting technology of high pressure abrasive water jet and the portable mixed abrasive water jet equipment (PAWE) was designed to meet the needs of emergency rescue in high gas mine shafts. Tested the PAWE in a high gas environment, and the result shows that the maximum cutting depth of solid iron pipe is 18 mm and the recoilforce of the sprayer is 28.9 N under the conditions that actual cutting pressure is 29 MPa, starting target distance is 10 mm, cutting speed is 180 mm/min and concentration of abrasive is 32%. The course of the experiment in the high gas environment was smooth and continuous, without any explosion. The PAWE is easy to move and operate, but the nozzle which was worn badly in the sprayer should be changed every 8 minutes.
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References
Cui M S, Sun J J, 1993. Technology of high pressure water jet. Beijing: China Coal Industry Publishing House.
Gong L H, Lu G S, Zhang X X, 2003. Study on the damage mechanism under the three-phases abrasive jet. Lubrication Engineering, 28(1): 58–60.
Jiang Y Y, 2009. Application of the nozzle of pre-mixed abrasive water jet cutting equipment. Mechanical Management and Development, 24(1): 81–82.
Lu G S, 2005. Research on cutting mechanism of pre-mixed abrasive water jet and its application to the disposition of exploders and dangerous conditions. Doctor’s Thesis, PLA University of Science and Technology.
Lu G S, Gong L H, 2004. Study on the portable abrasive water jet device. Journal of Yantai Vocational College, 10(1): 26–29.
Lu G S, Gong L H, Zhang X X, 2003. Research on improving abrasive mixing effect of abrasive waterjets. Machine Tool & Hydraulics, 31(1): 217–219.
Ni H J, Du Y K, Wang R H, 2008. Study on the lab experiment of pulsed abrasive water jet using bottom hole cuttings. Oil Drilling & Production Technology, 30(5): 25–28.
Shen Z H, 1998. Theory and technology of water jet. Dongying: China University of Petroleum Press.
Song Y Z, Wen X K, Liang Z Q, 1994. The cutting technology of high pressure water jet, lazer and plasma. China Mechanical Engineering, 5(5): 8–10.
Song Y Z, Wen X K, Liang Z Q, 1997. Cutting theory of the abrasive water jet. Chinese Journal of Mechanical Engineering, 33(3): 102–107.
Sun J J, 1992. The cutting technology of water jet. Xuzhou: China University of Mining & Technology Press.
Sun L, 2004. Two-phase fluid mechanics. Beijing: Higher Education Publishers Press.
Wang H L, Gong L H, Wu G H, 2007. Numerical simulation of pre-mixed abrasive high pressure water jet cutting nozzle. Journal of PLA University of Science and Technology (Natural Science Edition), 8(4): 387–390.
Wang H L, Gong L H, Yao D, 2005. Investigation of cutting nozzle in high pressure water jet. Machine Tool & Hydraulics, 33(4): 42–43.
Wang R H, Li L P, Zhou W D, 2010. Experiment and mathematical model of rotary cutting of casing with abrasive water jet. Journal of China University of Petroleum (Edition of Natural Science), 34(2): 56–61.
Yang G L, Zhou W H, Liu F, 2008. Simulation of flow field of high-pressure water-jet from nozzle with FLUENT. Journal of Lanzhou University of Technology, 34(2): 49–52.
Yang H B, Yang Y Y, Shen Z H, 2005. Experimental study of rock drilling with abrasive suspension swirling jet. Journal of China University of Petroleum (Edition of Natural Science), 29(3): 45–48.
Yue X A, 1996. The base knowledge of two-phase fluid. Beijing: Petroleum Industry Publishers Press.
Zeng R, Gao J H, Sun S A, 2009. The flaw characteristic analyse of abrasive-liquid device sealed sheath of high pressure water jet system. Lubrication Engineering, 34(3): 84–87.
Zeng R, Wang G X, Gu X F, 2007. Material for the abrasive-liquid device sealed sheath of premixed abrasive water jet system. Lubrication Engineering, 32(9): 136–139.
Zhang S X, Zhang Y X, 2009. Experiment and simulation study on relationship between diameter of high-pressure water jet nozzle and cutting capacity. Chinese Hydraulics & Pneumatics, 24(11): 18–20.
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Zeng, R., Du, Cl., Xu, R. et al. Portable mixed abrasive water jet equipment for rescue in high gas mine shaft. J Coal Sci Eng China 17, 207–211 (2011). https://doi.org/10.1007/s12404-011-0219-9
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DOI: https://doi.org/10.1007/s12404-011-0219-9