Shenhua Ningxia Coal Group

Yinchuan, China

Shenhua Ningxia Coal Group

Yinchuan, China
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Cheng G.-P.,Pingdingshan University | Xue L.-W.,Pingdingshan University | Zhang C.-X.,Shenhua Ningxia Coal Group
Acta Chimica Slovenica | Year: 2017

A rarely seen phenolato and azido-bridged polymeric cadmium(II) complex derived from the Schiff base ligand 2-bromo- 6-[(2-isopropylaminoethylimino)methyl]phenol (HL) has been prepared and characterized by elemental analysis, IR spectroscopy, and single crystal X-ray diffraction. The Schiff base ligand coordinates to the Cd atom through the NNO donor set. The Cd atom is hexa-coordinated in an octahedral geometry. Adjacent two Cd atoms are bridged by two phenolato groups generating a dimer with Cd···Cd distance of 3.475(1) Å. The dimers are further linked via azido bridges forming 2D sheets parallel to the bc plane.


Ma X.,Xi'an University of Science and Technology | Yang J.,Xi'an University of Science and Technology | Zhang Y.,Xi'an University of Science and Technology | Zhang Y.,Shenhua Ningxia Coal Group
Proceedings of the 28th Chinese Control and Decision Conference, CCDC 2016 | Year: 2016

Scraper conveyor is one of main electrical and mechanical equipment in the mining face, and its reliability has an important significance to production safety. In scraper conveyor reliability life analysis, the linear parameter method is often used to estimate reliability life parameters in traditional Weibull distribution model. But the error of prediction results is larger due to the nonlinear characteristics of fault data. To solve this problem, a simulated annealing algorithm is proposed to optimize the model parameters for the scraper conveyor reliability life prediction. Research results show that the simulated annealing algorithm has small life prediction error, and raises the accuracy of the scraper conveyor reliability life prediction. © 2016 IEEE.


Li X.-W.,Pingdingshan University | Xue L.-W.,Pingdingshan University | Zhang C.-X.,Shenhua Ningxia Coal Group
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2015

Two Schiff base ligands N,N′-bis(5-bromosalicylidene)-1,3-pentanediamine (H2L1) and N,N′-bis(2-hydroxy-1-naphthylidene)-1,3-pentanediamine (H2L2) and their nickel(II) and copper(II) complexes [NiL1] (1) and [CuL2] (2) have been prepared and characterized by elemental analyses, IR, and single crystal X-ray crystallographic determination. The crystal of (1) is monoclinic: space group P21/c, a = 9.680(2), b = 21.970(3), c = 10.728(2) A˚, β = 119.550(2)°, V = 1984.8(6) A˚3, Z = 4. The crystal of (2) is orthorhombic: space group Pbca, a = 18.261(2), b = 12.250(1), c = 19.742(2) A˚, V = 4416.2(7) A˚3, Z = 8. The Ni and Cu atoms in the complexes are in square planar coordination. The effect of the complexes on the antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans were studied. Copyright © Taylor & Francis Group, LLC.


Xu F.,Pingdingshan University | Xue L.-W.,Pingdingshan University | Zhang C.-X.,Shenhua Ningxia Coal Group
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2015

A new dinuclear oxovanadium(V) complex, [VO2(EMP)]2·BPY, where EMP is the mono-anionic form of 2-{[2-(2-hydroxyethylamino)ethylimino]methyl}-6-methylphenol (HEMP), and BPY is 4,4-bipyridine, has been synthesized and characterized by elemental analysis, FT-IR spectra, and single-crystal X-ray determination. The crystal of the complex is triclinic: space group P, a = 7.473(2) Å, b = 9.193(2) Å, c = 13.525(2) Å, α = 82.726(2)°, β = 83.253(2)°, γ = 69.861(2)°, V = 862.6(3) Å3, Z = 1. The asymmetric unit of the compound contains a dinuclear oxovanadium complex molecule and a 4,4-bipyridine molecule. The V⋯V distance is 3.153(1) Å. The V atoms in the complex are in octahedral coordination. The antibacterial activity of the compound against various bacteria was assayed. Copyright © 2015 Taylor & Francis Group, LLC.


Zhao X.-J.,Pingdingshan University | Xue L.-W.,Pingdingshan University | Zhang C.-X.,Shenhua Ningxia Coal Group
Synthesis and Reactivity in Inorganic, Metal-Organic and Nano-Metal Chemistry | Year: 2015

A new halo-substituted Schiff base ligand 2-bromo-6-[(2-ethylaminoethylimino)methyl]phenol (HL) and its copper(II) and zinc(II) complexes [Cu2L2(μ1,1-NCS)2] (1) and [ZnCl2(HL)] (2) (HL is the zwitterionic form of the Schiff base ligand) have been prepared and characterized by elemental analyses, IR, and single-crystal X-ray crystallographic determination. The crystal of (1) is monoclinic: space group P21/c, a = 10.909(1), b = 13.976(1), c = 10.161(1) A˚, β = 111.471(2)°, V = 1441.7(2) A˚3, Z = 2. The crystal of (2) is monoclinic: space group P21/n, a = 7.2682(4), b = 20.195(1), c = 10.8447(6) A˚, β = 106.420(2)°, V = 1526.9(2) A˚3, Z = 4. The Cu atoms in the copper complex are in square pyramidal coordination. The Zn atom in the zinc complex is in tetrahedral coordination. The effect of the complexes on the antimicrobial activity against Staphylococcus aureus, Escherichia coli, and Candida albicans were studied. Copyright © Taylor & Francis Group, LLC.


Feng Y.X.,Pingdingshan University | Xue L.W.,Pingdingshan University | Zhang C.X.,Shenhua Ningxia Coal Group
Russian Journal of Coordination Chemistry/Koordinatsionnaya Khimiya | Year: 2014

A new oxovanadium(V) complex, [VO(L)(Phen)], where L is the dianionic form of N-(2-hydroxynaphthylidene)-4-chlorobenzohydrazide, Phen is 1,10-phenanthroline, has been synthesized and characterized by elemental analysis, FT-IR spectra, and single crystal X-ray determination. The crystal of the complex is monoclinic: space group P21/c, a = 11.2376(8), b = 13.3068(10), c = 17.5593(11) Å, β = 106.806(2)°, V = 2513.6(3) Å3, Z = 4. The V atom in the complex is in octahedral coordination, with the phenolate O, imine N, and enolate O atoms of L and one N atom of Phen define the equatorial plane, and with the other N atom of Phen and one oxo O atom located at the axial positions. The complex is a good catalyst for the oxidation of thioanisole to the corresponding sulfoxide by cumene hydroperoxide. © 2014 Pleiades Publishing, Ltd.


Lu T.-K.,Henan Polytechnic University | Zhou T.-Y.,Shenhua Ningxia Coal Group | Yu H.,Jiaozuo Coal Industry Group Co.
Journal of Coal Science and Engineering | Year: 2010

This paper presented a method to create artificial fractures along the existing gas drainage borehole and increase the permeability of the coalbed using a high pressure waterjet cutting system. The field work conducted in Rujigou Colliery, Shenhua Ningxia Coal Group demonstrate that the coalbed permeability is increased, and accordingly, gas drainage efficiency is improved up to 3 to 6 times over the traditional methods using high pressure waterjet technique. Also, based on the monitoring data, the conceptual model for gas drainage process associated with different mining activities has been proposed, and few major advantages using waterjet assistance method have been identified.


Zheng X.,Hangzhou Normal University | Zhang C.,Shenhua Ningxia Coal Group | Luo C.,Shenhua Ningxia Coal Group | Tian G.,Shenhua Ningxia Coal Group | And 2 more authors.
Industrial and Engineering Chemistry Research | Year: 2016

The inclusion complex of thermoplastic polyurethane (TPU) and β-cyclodextrins (β-CD) with high TPU contents has been synthesized. The channel structure with large amount of uncovered TPU was confirmed by wide-angle X-ray diffraction (WAXD). High performance poly(oxymethylene) (POM) alloys were fabricated by simply melt mixing neat POM with the synthesized TPU inclusion complex (IC-TPU). The effects of the incorporation of IC-TPU on the structure and properties of POM have been investigated. Scanning electron microscope (SEM) results showed that IC-TPU was dispersed uniformly in POM matrix and there was robust interface between IC-TPU and POM matrix. Tensile test results indicated significant improvement in both strength and ductility of the IC-TPU modified POM as compared with neat POM. Moreover, the incorporation of IC-TPU resulted in the drastically enhanced thermal stability of POM. The initial degradation temperature increased as high as 40 °C with the addition of a small amount of IC-TPU. The investigation indicated that the IC-TPU exhibited a novel structure with a soft shell (uncovered TPU) and a hard core (β-CD covered TPU segments). Such soft shell-hard core structure improves not only the elongation at break but also the tensile strength of POM. The superior thermal stability was originated from the synergetic effects of the hydroxyl groups in β-CDs and the amino groups in TPU. The multifunctional effect of the IC-TPU opens a new avenue for the industrial application of POM. © 2016 American Chemical Society.


Yanzhen W.,China University of Petroleum - East China | Jinyun L.,China University of Petroleum - East China | Yanli D.,Shenhua Ningxia Coal Group | Hongling D.,China University of Petroleum - East China
Petroleum Processing and Petrochemicals | Year: 2014

The environmental rubber oil or FCC feedstock were prepared from FCC slurry using furfural as a extract solvent and petroleum ether as a co-solvent. The influence factors of extract temperature, solvent/oil ratio and extraction stages were investigated by crosscurrent extraction and countercurrent extraction process. The results show that the optimum conditions for single-stage extraction were: extraction temperature of 50 °C and solvent/oil ratio of 2. 5:1. At this condition the extraction effect becomes better with the extraction stage increasing. At three extraction stages, the polycyclic aromatic hydrocarbons (PCA) content of the refined oil obtained from the two processes were both less than 3% and their aromatic carbon rates were above 10%, meeting the EU requirements for environmental rubber oils. At the same time, the density of the refined oil was dropped below 0. 9 g/cm3 and the saturated hydrocarbon content reaches above 80%, which was considered to be a qualified FCC feedstock. The yield of the refined oil obtained from the multi-stage countercurrent extraction process reaches above 30%, remarkably higher than the yield obtained from the crosscurrent extraction process.


Peng F.,University of Science and Technology Beijing | Ji H.,University of Science and Technology Beijing | Yan X.,Shenhua Ningxia Coal Group
Applied Mechanics and Materials | Year: 2012

Rock bolting is one of the most common methods of rock reinforcement. To optimize bolt parameters for reasonably playing its properties under safe support condition, it's a must to study the mechanical characteristics of roadway and bolt. This paper shows that anchor bolts at the top of the rise side has the maximum force, middle of the two sides minimal. Middle of two sides has the largest displacement, top and bottom smallest by using flac3d to simulate the force of special-shaped roadway under the support of anchor bolts, combined with field observance of anchor bolts force. Therefore, by optimizing anchor bolts supporting parameters, we can effectively control the deformation of surrounding rocks and improve the whole stability through strengthening support and changing partial anchor bolts supporting parameters. © (2012) Trans Tech Publications, Switzerland.

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