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| 1 | Development of a time-dependent energy model to calculate the mining-induced stress over gates and pillars显示文摘Generally, longwall mining-induced stress results from the stress relaxation due to destressed zone that occurs above the mined panel. Knowledge of induced stress is very important for accurate design of adjacent gateroads and intervening pillars which helps to raise the safety and productivity of longwall mining operations. This study presents a novel time-dependent analytical model for determination of the longwall mining-induced stress and investigates the coefficient of stress concentration over adjacent gates and pillars. The model is developed based on the strain energy balance in longwall mining incorporated to a rheological constitutive model of caved materials with time-varying parameters. The study site is the Tabas coal mine of Iran. In the proposed model, height of destressed zone above the mined panel, total longwall mining-induced stress, abutment angle, induced vertical stress, and coefficient of stress concentration over neighboring gates and intervening pillars are calculated. To evaluate the effect of proposed model parameters on the coefficient of stress concentration due to longwall mining, sensitivity analysis is performed based on the field data and experimental constants. Also, the results of the proposed model are compared with those of existing models. The comparative results confirm a good agreement between the proposed model and the in situ measurements. According to the obtained results, it is concluded that the proposed model can be successfully used to calculate the longwall mining-induced stress. Therefore, the optimum design of gate supports and pillar dimensions would be attainable which helps to increase the mining efficiency. | Mohammad Rezaei Mohammad Farouq Hossaini Abbas Majdi | 2015 | Journal of Rock Mechanics and Geotechnical Engineering2015，7，3： | 6 |
| 2 | Prediction of representative deformation modulus of longwall panel roof rock strata using Mamdani fuzzy system显示文摘Deformation modulus is the important parameter in stability analysis of tunnels, dams and mining structures. In this paper, two predictive models including Mamdani fuzzy system(MFS) and multivariable regression analysis(MVRA) were developed to predict deformation modulus based on data obtained from dilatometer tests carried out in Bakhtiary dam site and additional data collected from longwall coal mines. Models inputs were considered to be rock quality designation, overburden height, weathering,unconfined compressive strength, bedding inclination to core axis, joint roughness coefficient and fill thickness. To control the models performance, calculating indices such as root mean square error(RMSE),variance account for(VAF) and determination coefficient(R2) were used. The MFS results show the significant prediction accuracy along with high performance compared to MVRA results. Finally, the sensitivity analysis of MFS results shows that the most and the least effective parameters on deformation modulus are weathering and overburden height, respectively. | Mohammad Rezaei Mostafa Asadizadeh Abbas Majdi Mohammad Farouq Hossaini | 2015 | International Journal of Mining Science and Technology2015，25，1： | 6 |
| 3 | Modification of rock mass rating system:Interbedding of strong and weak rock layers显示文摘Rock mass classification systems are the very important part for underground projects and rock mass rating(RMR) is one of the most commonly applied classification systems in numerous civil and mining projects. The type of rock mass consisting of an interbedding of strong and weak layers poses difficulties and uncertainties for determining the RMR. For this, the present paper uses the concept of rock bolt supporting factor(RSF) for modification of RMR system to be used in such rock mass types. The proposed method also demonstrates the importance of rock bolting practice in such rock masses. The geological parameters of the Shemshak Formation of the Alborz Tunnel in Iran are used as case examples for development of the theoretical approach. | Mohammad Mohammadi Mohammad Farouq Hossaini | 2017 | Journal of Rock Mechanics and Geotechnical Engineering2017，9，6： | 5 |
| 4 | Use of fuzzy set theory for minimizing overbreak in underground blasting operations——A case study of Alborz Tunnel,Iran显示文摘In order to increase the safety of working environment and decrease the unwanted costs related to overbreak in tunnel excavation projects, it is necessary to minimize overbreak percentage. Thus, based on regression analysis and fuzzy inference system, this paper tries to develop predictive models to estimate overbreak caused by blasting at the Alborz Tunnel. To develop the models, 202 datasets were utilized, out of which 182 were used for constructing the models. To validate and compare the obtained results,determination coefficient(R2) and root mean square error(RMSE) indexes were chosen. For the fuzzy model, R2 and RMSE are equal to 0.96 and 0.55 respectively, whereas for regression model, they are 0.41 and 1.75 respectively, proving that the fuzzy predictor performs, significantly, better than the statistical method. Using the developed fuzzy model, the percentage of overbreak was minimized in the Alborz Tunnel. | Mohammadi Mohammad Hossaini Mohammad Farouq Mirzapour Bahman Hajiantilaki Nabiollah | 2015 | International Journal of Mining Science and Technology2015，25，3： | 3 |
| 5 | Multicomponent reactions for the synthesis of functionalized 1,4-oxathiane-3-thiones under microwave irradiation in water显示文摘A series of substituted l,4-oxathiane-3-thione derivatives were synthesized via one-pot multicomponent reactions of nitromethane,carbon disulfide and oxiranes in the presence of Et_3N in water as the solvent under microwave irradiation.Particularly valuable features of this method include high yields of products,broad substrate scope,short reaction time and straightforward procedure. | Zinatossadat Hossaini Faramarz Rostami-Charati Samereh Seyfi Mehdi Ghambarian | 2013 | Chinese Chemical Letters2013，24，5： | 3 |
| 6 | Expeditious solvent-free synthesis of 1,3-thiazolanes via multicomponent reactions显示文摘A series of 1 3-thiazolane derivatives have been synthesized via multicomponent reactions of activated acetylenes,primary amines and isothiocyanates in the presence of a catalytic amount of Nmethylimidazole under solvent-free conditions. | Zinatossadat Hossaini Faramarz Rostami-Charati Mahboube Eslami Moghadam Fatemeh Moghaddasi-Kochaksaraee | 2014 | Chinese Chemical Letters2014，25，5： | 2 |
| 7 | Solvent-free synthesis of substituted five membered heterocycles: One-pot reaction of primary amine and alkyl propiolate or isothiocyanate in the presence of oxalyl chloride显示文摘A novel, convenient and efficient approach to the synthesis of pyrrole and imidazole derivatives via the reaction between primary amines, alkyl propiolates or isothiocyanate and oxalyl chloride is described. The method offers several advantages including high yields of products and performing reaction under solvent-free conditions. | Zinatossadat Hossaini | 2014 | Chinese Chemical Letters2014，25，1： | 2 |
| 8 | DNA-binding studies of valrubicin as a chemotherapy drug using spectroscopy and electrochemical techniques显示文摘In this study, the molecular interactions between valrubicin, an anticancer drug, and fish sperm DNA have been studied in phosphate buffer solution(pH 7.4) using UV–Vis spectrophotometry and cyclic voltammetry techniques. Valrubicin intercalated into double stranded DNA under a weak displacement reaction with methylene blue(MB) molecule in a competitive reaction. The binding constant(kb) of valrubicin-DNA was determined as 1.75×10~3L/mol by spectrophotometric titration. The value of non-electrostatic binding constant(k_t^0) was almost constant at different ionic strengths while the ratio of k_t^0/k_b increased from 4.51% to 23.77%.These results indicate that valrubicin binds to ds-DNA via electrostatic and intercalation modes.Thermodynamic parameters including ΔH^0, ΔS^0and ΔG^0for valrubicin-DNA interaction were determined as-25.21×10~3k J/mol, 1.55×10~2k J/mol K and-22.03 k J/mol, respectively. Cyclic voltammetry study shows a pair of redox peaks for valrubicin at 0.45 V and 0.36 V(vs. Ag/Ag Cl). The peak currents decreased and peak positions shifted to positive direction in the presence of DNA, showing intercalation mechanism due to the variation in formal potential. | Reza Hajian Parvin Hossaini Zahra Mehrayin Pei Meng Woi Nafiseh Shams | 2017 | Journal of Pharmaceutical Analysis2017，7，3： | 2 |
| 9 | Measurement of facial movements with Photoshop software during treatment of facial nerve palsy 显示文摘 | Pourmomeny AA Zadmehr H Hossaini M | 2011 | J Res Med Sci2011，16，10： | 1 |
| 10 | Polymeric trileaflet prosthetic heart valves:evolutionand path to clinical reality 显示文摘 | Claiborne T E Slepian M J Hossainy S Bluestein D | 2012 | Expert Rev Med De-vices2012，9，： | 1 |
| 11 | Essential hints in selection of laboratorial data to evaluate failure criteria显示文摘 | Hossaini S M F | | 0，，01： | 1 |
| 12 | Polymeric trileaflet prosthetic heart valves: evolution and path to clinical reality 显示文摘 | Claiborne TE Slepian M J Hossainy S | 2012 | Ex- pert Rev Med Devices2012，9，： | 1 |
| 13 | Cumulus cells of oocyte-cumulus complexes secrete a meisis-activating substance when stimulated with FSH显示文摘 | Andersen C Y Hossaini A | 1997 | Mol Reprod Dev1997，46，： | 1 |
| 14 | Cumulus cells of oocyte-cumulus complexes secrete a meiosis-activating substance when stimulated with FSH显示文摘 | Byskov A G Yding Andersen C Hossaini A | 1997 | Mol Reprod Dev1997，46，： | 1 |
| 15 | Stage IV colorectal canc- er: outcomes following the liver- first approach 显示文摘 | de Rosa A Gomez D Hossaini S | 2013 | J Surg Oncol2013，08，7： | 1 |
| 16 | Lack of oestrogenic effects of food preservatives(parabens)in uterotrophic assays显示文摘 | HOSSAINI A LARSEN J J LARSEN J C | 2000 | Food Chem Toxicol2000，38，： | 1 |
| 17 | Determining the effect of training the continuous quality improvement on knowledge,attitude,performance and the level of occupational satisfaction of the nurses显示文摘 | Hossaini MA Kakooyee H Shah ZS | | 0，，： | 1 |
| 18 | Diastereoselective synthesis of fused [1,3]thiazolo[1,3]oxazins and [1,3]oxazino[2,3-b][1,3]benzothiazoles显示文摘 | Issa Yavari Zinatossadat Hossaini Sanaz Souri Samereh Seyfi | 2009 | Molecular Diversity2009，，4： | 1 |
| 19 | Embryonic NANOG Activity Defines Colorectal Cancer Stem Cells and Modulates through AP1‐ and TCF‐dependent Mechanisms显示文摘 | Elsayed E. Ibrahim Roya Babaei‐Jadidi Anas Saadeddin Bradley Spencer‐Dene Sina Hossaini Mohammed Abuzinadah Ningning Li Wakkas Fadhil Mohammad Ilyas Dominique Bonnet Abdolrahman S. Nateri | 2012 | STEM CELLS2012，，10： | 1 |
| 20 | Male reproductive effects of octylphenol and estradiol in Fischer and Wistar rats 显示文摘 | HOSSAINI A DALGAARD M VINGGAARD A M | 2003 | Reprod Toxicol2003，17，： | 1 |
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