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| 1 | Creep properties and resistivity-ultrasonic-AE responses of cemented gangue backfill column under high-stress area显示文摘To investigate the creep and instability properties of a cemented gangue backfill column under a highstress area,the uniaxial compression creep tests were conducted by single-step and multi-step loading of prismatic samples made of cemented gangue backfill material(CGBM)under the high stressstrength ratio.The creep damage was monitored using an electrical resistivity device,ultrasonic testing device,and acoustic emission(AE)instrument.The results showed that the CGBM sample has a creep hardening property.The creep failure strength(CFS)is slightly larger than the uniaxial compressive strength(UCS),ranging in ratio from 108.9%to 116.5%.The instantaneous strain,creep strain,and creep rate increase with increasing stress-strength ratio in the single-step loading creep tests.The instantaneous strain and creep strain decrease first and then increase during the multi-step loading creep process.The axial creep strain of the CGBM column can be expressed by the viscoelastic-plastic creep model.Creep instability is caused by the accumulation of strain energy under multi-step loading and the continuous lateral expansion at the unconstrained middle position during the creep process.The creep stability of a CGBM column in a high-stress area can be monitored based on the variation of electrical resistivity,ultrasonic pulse velocity(UPV),and AE signals. | Hongyu Ran Yuxia Guo Guorui Feng Tingye Qi Xianjie Du | 2021 | International Journal of Mining Science and Technology2021，31，3： | 7 |
| 2 | Stress environment of entry driven along gob-side through numerical simulation incorporating the angle of break显示文摘Angle of break(AOB)is the acute angle created by the coal seam bedding plane and caving line formed by roof strata movement after extraction of a longwall panel.It has a significant influence on stress redistribution both in the gob and abutment.Throughout numerical simulation investigations up to now,little attention has been paid to it or an AOB of 90°was used,which however,is not realistic.This paper presents a detailed numerical modelling incorporating the AOB against Zhenchengdi Coal Mine.The AOB was obtained through cross-measure boreholes.Hoek-Brown constitutive model was used to simulate the rock masses.Double-yield constitutive model,which was best fitted by Salamon's model,was used to simulate the gob.The results show that a‘‘/\shape'shear failure zone develops around the gob.The shear failure in the floor along the panel edge is due to opposite shear of rock mass on two sides of the caving line,and the number of yielded zones within the gob floor close to the gob edge is smaller.According to the research,the entry was determined to be driven under the gob edge employing splitlevel longwall panel layout(SLPL).The other numerical simulation for SLPL shows that stress around the god-side entry is much smaller than pre-mining stress,and the area of intact rock mass at the elevating section is larger than conventional layout.Numerical modelling was then validated by field observation. | Guorui Feng Pengfei Wang | 2020 | International Journal of Mining Science and Technology2020，30，2： | 5 |
| 3 | Simulation of recovery of upper remnant coal pillar while mining the ultra-close lower panel using longwall top coal caving显示文摘With the depletion of easily minable coal seams,less favorable reserves under adverse conditions have to be mined out to meet the market demand.Due to some historical reasons,large amount of remnant coal was left unrecovered.One such case history occurred with the remnant rectangular stripe coal pillars using partial extraction method at Guandi Mine,Shanxi Province,China.The challenge that the coal mine was facing was that there is an ultra-close coal seam right under it with an only 0.8–1.5 m sandstone dirt band in between.The simulation study was carried out to investigate the simultaneous recovery of upper remnant coal pillars while mining the ultra-close lower panel using longwall top coal caving(LTCC).The remnant coal pillar was induced to cave in as top coal in LTCC system.Physical modelling shows that the coal pillars are the abutments of the stress arch structure formed within the overburden strata.The stability of overhanging roof strata highly depends on the stability of the remnant coal pillars.And the gob development(roof strata cave-in)is intermittent with the cave-in of these coal pillars and the sandstone dirt band.FLAC3D numerical modelling shows that the multi-seam interaction has a significant influence on mining-induced stress environment for mining of lower panels.The pattern of the stress evolution on the coal pillars with the advance of the lower working face was found.It is demonstrated that the stress relief of a remnant coal pillar enhances the caveability of the pillars and sandstone dirt band below. | Guorui Feng Pengfei Wang | 2020 | International Journal of Mining Science and Technology2020，30，1： | 5 |
| 4 | Endothelial cells-targeted soluble human Delta-like 4 suppresses both physiological and pathological ocular angiogenesis显示文摘Due to its essential roles in angiogenesis, Notch pathway has emerged as an attractive target for the treatment of pathologic angiogenesis. Although both activation and blockage of Notch signal can impede angiogenesis, activation of Notch signal may be more promising because it was shown that long-term Notch signal blockage resulted in vessel neoplasm. However, an in vivo deliverable Notch ligand with highly efficient Notch-activating capacity has not been developed. Among all the Notch ligands, Delta-like4(Dll4) is specifically involved in angiogenesis. In this study, we generated a novel soluble Notch ligand h D4 R, which consists of the Delta-Serrate-Lag-2 fragment of human Dll4 and an arginine-glycine-aspartate(RGD) motif targeting endothelial cells(ECs). We demonstrated that h D4 R could bind to ECs through its RGD motif and effectively triggered Notch signaling in ECs. Further, we confirmed that h D4 R could suppress angiogenesis in vitro as manifested by network formation assay and sprouting assay. More importantly, h D4 R efficiently repressed neonatal retinal angiogenesis and laser-induced choroidal neovascularization(CNV) as well in vivo. In conclusion, we have developed an in vivo deliverable Notch ligand h D4 R, which suppresses angiogenesis both in vitro and in vivo, thus providing a new approach to tackle excessive angiogenesis relevant disease such as CNV. | YAN XianChun YANG ZiYan CHEN Yan LI Na WANG Li DOU GuoRui LIU Yuan DUAN JuanLi FENG Lei DENG SanMing HAN Hua ZHANG Ping | 2015 | Science China(Life Sciences)2015，58，5： | 5 |
| 5 | Characteristics of dust distributions and dust control measures around road-header drivers in mining excavation roadways显示文摘In the present study,a numerical simulation method was adopted in order to examine the characteristics of dust dispersion during continuous dust release periods(CRP)and stop dust release periods(SRP).The purpose was to analyze the dust distributions and migration actions around road-header drivers in excavation roadways,and then determine effective dust control measures for underground coal mines.This study’s simulation results showed that the dust concentrations continuously increased,and then gradually reached a stability level during the CRP.During that time,the locations of the drivers were always at the intersection of the original migration dust and the backflow dust,and the drivers were invaded by these two strands dust.However,during the SRP,the dust concentrations gradually decreased under the actions of the roadway ventilation.Besides,obvious backflow phenomena were observed around the road-header during the SRP.The locations of the drivers were still within the backflow paths of the high dust concentrations.At the present time,dust separation and extraction systems have been implemented in coal mines,including vacuuming and air knife devices,which are designed to control the dust around the road-header drivers.The field applications of these systems were conducted in the 26 mechanized excavation faces of the Zhangcun Coal Mine.The results revealed that the use of these dust removal systems could effectively reduce the dust concentrations around the road-header drivers.In the present study,the dust removal rates during the CRP and SRP were determined to reach up to 88.7% and 94.6%,respectively.Therefore,the results of this research study provided effective theoretical guidance of the characteristics of dust distributions in coal mines,and introduced effective control methods for the hazardous dust concentrations around road-header drivers during the excavation process. | Shengyong Hu Yang Gao Guorui Feng Yisheng Huang He Shaoa Qi Liao Fei Hu | 2021 | Particuology2021，19，5： | 4 |
| 6 | On the ill-conditioning of the MFS for irregular boundary data with sufficient regularity显示文摘 | Guorui Feng Ming Li C.S. Chen | 2014 | Engineering Analysis with Boundary Elements2014，，： | 1 |
| 7 | Measurements of black and organic carbon emission factors for household coal combustion in China: implication for emission reduction 显示文摘 | CHEN Yingjun ZHI Guorui FENG Yauli | 2009 | Environ Sci Technol2009，43，24： | 1 |
| 8 | Emission characteristics of carbonaceous particles from various residential coal-stoves in China显示文摘 | ZHI Guorui CHEN Yingjun FENG Yanli | 2008 | Environ Sci Technol2008，42，9： | 1 |
| 9 | Influence of backfilling rate on the stability of the'backfilling bodyimmediate roof'cooperative bearing structure显示文摘To reduce the cost of backfilling coal mining and utilize the underground space of coal mines,a new backfilling mining method with low backfilling rate called constructional backfilling coal mining(CBCM)is proposed.The 'backfilling body-immediate roof' cooperative bearing structure of CBCM is analyzed by establishing the model of the medium thick plate on an elastic foundation.The influence of the backfilling rate on the stability of overlying strata is analyzed by the numerical simulation experiment.The control effect of CBCM is verified by a physic similar simulation test.The economic benefit of CBCM is analyzed.The conclusions are:the deformation characteristics of the immediate roof and critical backfilling spacing in CBCM can be analyzed based on the Hu Haichang’s theory.Exerting the bearing capacity of the immediate roof is beneficial to the stability of the overlying strata.The CBCM has a good control effect on the overburden in Xinyang Mine when the backfilling rate is lower than 25%.The backfilling cost of per ton coal is 37.39 yuan/t when the backfilling rate is 13.7%,with a decrease rate of 56.63%than the full-filling.The research results can provide theoretical support for the application of CBCM in coal mining. | Xianjie Du Guorui Feng Min Zhang Zehua Wang Wenhao Liu | 2022 | International Journal of Mining Science and Technology2022，32，6： | 1 |
| 10 | A probe into 'mining technique in the condition of floor failure' for coal seam above longwall goals 显示文摘 | FENG Guorui WANG Xianxia KANG Lixun | 2008 | Journal of Coal Science &Engineering2008，14，1： | 1 |
| 11 | Deterministic convergence of an online gradient method forBP neural networks 显示文摘 | Wei Wu Guorui Feng Zhengxue Li Yuesheng Xu | 2005 | IEEE Transactions on NeuralNetworks2005，16，3： | 1 |
| 12 | Investigation of tunable stretcher for ultrashort pulses based on silica wires with sub- wavelength-diameters显示文摘 | Zhou Guorui Feng Guoying Zhou Shouhuan | 2012 | Optics and Laser Technology2012，44，4： | 1 |
| 13 | Errorminimized extreme learning machine with growth of hiddennodes and incremental learning 显示文摘 | FENG Guorui HUANG Guangbin LIN Qingping | 2009 | IEEE Transactions onNeural Networks/a Publication of the IEEE NeuralNetworks Council2009，20，8： | 1 |
| 14 | Perceptual differential energy watermarking for H.264/AVC显示文摘 | Duyao Wang Sujuan Huang Guorui Feng Shuozhong Wang | 2012 | Multimedia Tools and Applications2012，，3： | 1 |
| 15 | Differential Energy Watermarking Based on Macro - block Prediction 显示文摘 | Qian zeng Guorui feng | 2011 | IEEE Computation - al Intelli- gence and Security2011，11，4： | 1 |
| 16 | Error minimized extreme learning machine with growth of hidden nodes and incremental learning 显示文摘 | FENG Guorui HUANG Guangbin LIN Qingping | 2009 | IEEE Transactions on Neural Networks2009，20，8： | 1 |
| 17 | Error Minimized Extreme Learning Machine with Growth of Hidden Nodes and Incremental Learning 显示文摘 | Feng Guorui Huang Guangbin Lin Qingping | 2009 | IEEE Transactions on Neural Networks2009，20，8： | 1 |
| 18 | Emission characteristics of carbonaceous particles from various residential coal-stoves in China 显示文摘 | ZHI Guorui CHEN Yingjun FENG Yanli | 2008 | Environmental Science & Technology2008，42，9： | 1 |
| 19 | Measurements of emission factors for carbonaeeous particles from residential raw-coal combustion in China 显示文摘 | CHEN Yingjun ZHI Guorui FENG Yanli | 2006 | Geophysical Research Letters2006，33，20： | 1 |
| 20 | Emission characteristics of carbonaceous particles from various residential coal-stoves in China 显示文摘 | ZHI Guorui CHEN Yingjun FENG Yanli | 2008 | Environmental Science & Technology2008，42，9： | 1 |
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