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| 1 | Effect of roadway turnings on gas explosion propagation characteristics in coal mines显示文摘In order to reveal the effect of turnings on explosion propagation, experiments were performed in three different pipes (single bend, U-shaped pipe and Z-shaped pipe). Flame and pressure transducers were used to track the velocity at the explosion front. When the pipes were filled with methane, the explosion strength was significantly enhanced due to the turbulence induced by increasing the number of turnings, while the flame speed (S f) and peak overpressure (DP max) increased dramatically. In addition, the strength of the explosion increased in violence as a function of the number of turnings. However, when the bend was without methane, the turnings weakened the strength of the explosion compared with the ordinary pipe, shown by the decrease in the values of DP max and S f . In addition, the propagation characteristics in a U-shaped pipe were similar to those in a Z-shaped pipe and the values of DP max and S f were also close. The results show that the explosion propagation characteristics largely depend on gas distribution in the pipes and the number of turnings. The different directions of the turnings had no effect. | Zhu Chuanjie Lin Baiquan Ye Qing Zhai Cheng | 2011 | Mining Science and Technology2011，21，3： | 12 |
| 2 | Effect of variation in gas distribution on explosion propagation characteristics in coal mines显示文摘In order to investigate the effect of variation in the distribution of gas on explosion propagation characteristics in coal mines, experiments were carried out in two different channels with variation in gas concentration and geometry. Flame and pressure transducers were used to track the explosion front velocity. The flame speed (Sf) showed a slight downward trend while the methane concentration varied from 10% to 3% in the experimental channel. The peak overpressure (Pmax) dropped dramatically when compared with normal conditions. As well, the values of Pmax and Sf decreased when the methane concentration dropped from 8% to 6%. The flame speed in the channel, connected to a cylinder with a length varying from 0.5 to 2 m, was greater than that in the normal channel. The peak overpressure was also higher than that under normal conditions because of a higher flame speed and stronger pressure piling up. The values of Pmax and Sf increased with an increase in cylinder length. The research results indicate that damage caused by explosions can be reduced by decreasing the gas concentration, which should be immediately detected in roadways with large cross-sections because of the possibility of greater destruction caused by more serious explosions. | ZHU Chuanjie | 2010 | Mining Science and Technology2010，20，4： | 11 |
| 3 | A numerical simulation of the influence initial temperature has on the propagation characteristics of, and safe distance from, a gas explosion显示文摘A model roadway with a cross-sectional area of 80 mm 80 mm and a length of 100 m was used to estimate the overpressure, the temperature, the density, and the combustion rate during an explosion. Auto-ReaGas software was used for the calculations and the initial temperatures were 248, 268, 308, or 328 K. The methaneair mixture had a fuel concentration of 9.5% and the tunnel had a filling ratio of 10%. The results show that the safe distance necessary to avoid harm from the shock wave increases with increasing initial temperature. The distance where the peak overpressure begins to rise, and where the maximum value occurs, increases as the initial temperature increases. These are almost linear functions of the initial temperature. At locations before shock wave attenuation has occurred increasing the initial temperature linearly increases the maximum temperature at each point following along the tunnel. At the same time, the peak overpressure, the maximum density, and the maximum combustion rate decrease linearly. How-ever, after the shock wave has attenuated the attenuation extent of the peak overpressure decreases with an increase in initial temperature. The influence of the initial temperature on the explosion propagation depends on the combined effects of inhibiting and enhancing factors. The research results can provide a theoretical guidance for gas explosion disaster relief and treatment in underground coal mines. | Jiang Bingyou Lin Baiquan Shi Shulei Zhu Chuanjie tiu Qian Zhai Cheng | 2012 | International Journal of Mining Science and Technology2012，22，3： | 10 |
| 4 | Study on 'fracturing-sealing' integration technology based on high-energy gas fracturing in single seam with high gas and low air permeability显示文摘To improve the gas extraction efficiency of single seam with high gas and low air permeability,we developed the'fracturing-sealing'integration technology,and carried out the engineering experiment in the3305 Tunliu mine.In the experiment,coal seams can achieve the aim of antireflection effect through the following process:First,project main cracks with the high energy pulse jet.Second,break the coal body by delaying the propellant blasting.Next,destroy the dense structure of the hard coal body,and form loose slit rings around the holes.Finally,seal the boreholes with the'strong-weak-strong'pressurized sealing technology.The results are as follows:The average concentration of gas extraction increases from8.3%to 39.5%.The average discharge of gas extraction increases from 0.02 to 0.10 m^3/min.The tunneling speeds up from 49.5 to 130 m/month.And the permeability of coal seams improves nearly tenfold.Under the same conditions,the technology is much more efficient in depressurization and antireflection than common methods.In other words,it will provide a more effective way for the gas extraction of single seam with high gas and low air permeability. | Zhang Chao Lin Baiquan Zhou Yan Zhai Cheng Zhu Chuanjie | 2013 | International Journal of Mining Science and Technology2013，23，6： | 10 |
| 5 | Effect of high-voltage thermal breakdown on pore characteristics of coal显示文摘High-voltage thermal breakdown has great potential application in permeability enhancement of coal seam. The characteristics of the breakdown channel, coal element, porosity and microscopic coal petrography of coal under high-voltage electric load were experimentally studied. The coal interior left apparent tracks due to electric current burning with high temperature. The percentage of C, O, Al, Fe, and Si had slightly decreased, while the content of element N increased obviously. Low-pressure nitrogen gas adsorption(LP-N_2GA) and mercury intrusion analysis showed that coal porosity increased. The increases of micropores and mesopores are beneficial to promotion of the ability of gas storage, and the increase of macropores could enhance the gas seepage and migration. The results of scanning electron microscope(SEM) show that there are many exogenous fractures in coal, which is also beneficial to gas seepage and migration. The results lay a theoretical foundation for application of high-voltage thermal breakdown in coal mines. | Zhu Chuanjie Lu Ximiao Gao Zishan Yan Fazhi Guo Chang Zhang Xiangliang | 2017 | International Journal of Mining Science and Technology2017，27，6： | 2 |
| 6 | Microstructure evolution and mechanical property characterization of a nickel-based superalloy at the mesoscopic scale显示文摘Nickel-based superalloys have become the critical materials of micro-parts depending on outstanding mechanical properties.The effects of the grain size and precipitates on the mechanical properties at the mesoscopic scale are difficult to be revealed using conventional macroscopic material constitutive models.In the present study,the microstructure evolution of the γ' phase and the tensile mechanical properties of a nickel-based superalloy at the mesoscopic scale were investigated systematically.Three variants of γ' phases precipitated corresponding to [00],[00] and [001] orientations of the matrix y phase.The quantitative statistics results showed that as the aging time increases,the particle size and volume fraction of the γ~' phase increase.As the grain size increases,the flow stress decreases due to the dwindling of grain boundary strengthening.Furthermore,the precipitation strengthening of γ' and γ' phases induces the increase of flow stress.An important conclusion is drawn that the size effect at the mesoscopic scale depends not only on the sample size and grain size but also on the particle size and volume fraction of the precipitates.The established constitutive model which considers grain boundary strengthening,precipitation strengthening and solid solution strengthening can accurately describe the flow stress characteristics of nickel-based superalloys at the mesoscopic scale. | Qiang Zhu Gang Chen Chuanjie Wang Lukuan Cheng Heyong Qin Peng Zhang | 2020 | Journal of Materials Science & Technology2020，47，12： | 2 |
| 7 | Explosion characteristics of nano-aluminum powder–air mixtures in 20L spherical vessels显示文摘 | Qingzhao Li Baiquan Lin Wenxia Li Cheng Zhai Chuanjie Zhu | 2011 | Powder Technology2011，，： | 1 |
| 8 | Preparation, Structure and Properties of high Strength Alginate Fiber 显示文摘 | Ping Zhu Chuanjie Zhang Shuying Sui | 2009 | Fie- search Joumal of Textile and Apparel2009，13，4： | 1 |
| 9 | Flame retardancy and pyrolysis products of calcium alginate fibers 显示文摘 | Chuanjie Zhang Ping Zhu Jinchao Zhao | 2012 | Advanced Materials Research2012，441，： | 1 |
| 10 | Flame acceleration of premixed methane/air explosion in parallel pipes 显示文摘 | Zhu Chuanjie Lin Baiquan Jiang Bingyou | 2012 | Journal of Loss Prevention in the Process Industries2012，25，2： | 1 |
| 11 | Preparation, structure and properties of high strength alginate fiber显示文摘 | Zhu Ping Zhang Chuanjie Sui Shuying | 2009 | Research Journal of Textile and Apparel2009，13，4： | 1 |
| 12 | Explosive characteristics of nanometer and micrometer aluminum-powder显示文摘The explosive characteristics of aluminum powder have great significance in preventing and controlling aluminum-dust explosion accidents, especially the nano-aluminum powder. The explosion characteris- tics of 100 nm and 75 lm aluminum powders were investigated by using a 20 L spherical explosion cav- ity and a horizontal pipe whose cross-section area is 80 mm 80 mm and length is 8 m. The results show that the maximum explosion pressure and its rising rate of 100 nm aluminum powder gradually increase with increasing concentration of aluminum-powder at the beginning. When aluminum-powder concen- tration is 1 kg/m3, the maximum explosion pressure reaches its maximum, and then gradually decreases. While when the concentration is 1.25 kg/m3, the maximum rate of pressure rise obtains its maximum, and then decreases. After 100 nm aluminum powder is exploded in pipes, the peak overpressure of blast wave first decreases and then increases to the maximum at a distance of 298 cm from the ignition source, and then gradually decreases. The most violent concentration is about 0.4 kg/m3 which is lower than 0.8 kg/m3 of 75 lm aluminum powder, so 100 nm aluminum powders are more easily exploded. The change laws of maximum explosion pressure, maximum rate of pressure rise and blast-wave peak over- pressure of 100 nm aluminum powders with concentration are similar to those of 75 lm aluminum pow- ders, but these values are much higher than 75 lm aluminum powders under the same concentration, so the aluminum-powders explosion of 100 nm will produce more harms. In the process of production, stor- age and transportation of aluminum powder, some relevant preventive measures can be taken to reduce the loss caused by aluminum-dust explosion according to nano-aluminum dust. | Jiang Bingyou Lin Baiquan Shi Shulei Zhu Chuanjie Li Wenxia | 2011 | Mining Science and Technology2011，21，5： | 0 |
| 13 | Clinical Observation CLINICAL AND EXPERIMENTAL STUDIES ON TREATING CORONARY HEART DISEASE(CHD)WITH ACUPUNCTURE显示文摘According to the exposition of ancientTCM classics concerning CHD,we have en-gaged in clinical and experimental studies ofCHD.The results are reported as follows: | Li Chuanjie Bi Lige Zhu Bojun Liu Jianfeng Jiang Aiping Xue Shaomin Institute of Acupuncture and Moxibustion,China Academy of TCM,Beijing 100700,China | 1993 | World Journal of Acupuncture-Moxibustion1993，3，2： | 0 |
| 14 | New insights into the influence of myo-inositol on carbohydrate metabolism during osmoregulation in Nile tilapia (Oreochromis niloticus)显示文摘A two-factor(23)orthogonal testwas conducted to investigate the effects of dietary myo-inositol(MI)on the osmoregulation and carbohydrate metabolism of euryhaline fish tilapia(Oreochromis niloticus)under sustained hypertonic stress(20 practical salinity units[psu]).6 diets containing either normal carbohydrate(NC,30%)or high carbohydrate(HC,45%)levels,with 3 levels(0,400 and 1,200 mg/kg diet)of MI,respectively,were fed to 540 fish under 20 psu for 8 weeks.Dietary MI supplementation significantly improved growth performance and crude protein content of whole fish,and decreased the content of crude lipid of whole fish(P<0.05).Curled,disordered gill lamella and cracked gill filament cartilage were observed in the gill of fish fed diets without MI supplementation.The ion transport capacity in gill was significantly improved in the 1,200 mg/kg MI supplementation groups compared with the 0 mg/kg MI groups(P<0.05).Moreover,the contents of Na^(+),K^(+),Cl^(-)in serum weremarkedly reduced with the dietary MI supplementation(P<0.05).The fish fed 1,200 mg/kg MI supplementation had the highest MI content in the gills and the lowest MI content in the serum(P<0.05).Additionally,the fish fed with 1,200 mg/kg MI supplementation had the highest MI synthesis capacity in gills and brain(P<0.05).Dietary MI markedly promoted the ability of carbohydrate metabolism in liver(P<0.05).Moreover,fish in the 1,200 mg/kg MI groups had the highest antioxidant capacity(P<0.05).This study indicated that high dietary carbohydrate would intensify stress,and impair the ability of osmoregulation in tilapia under a long-term hypersaline exposure.The supplementation of MI at 1,200 mg/kg in the high carbohydrate diet could promote carbohydrate utilization and improve the osmoregulation capacity of tilapia under long-term hypertonic stress. | Jiahua Zhu Liqiao Chen Yuxing Huang Fan Zhang Jingyu Pan Erchao Li Jianguang Qin Chuanjie Qin Xiaodan Wang | 2022 | Animal Nutrition2022，，3： | 0 |
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