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Cheng G.,Dalian University of Technology | Cheng G.,University of Tasmania | Cheng G.,Shaanxi Coal and Chemical Technology Institute Co.
International Journal of Rock Mechanics and Mining Sciences | Year: 2017

A microseismic monitoring technique is adopted to investigate the distribution regularity of microseismic events released by the coal mining - induced roof rock mass along the vertical and horizontal directions in combination with mine geological data. On the basis of the quantity and energy distributions of the microseismic events recorded using the microseismic monitoring technique, a zoning method is first established for the roof strata movement in the vertical and horizontal directions. The vertically zoning method is then applied to analyze the microseismic monitoring results obtained in the Dongjiahe Coal Mine, which divides rock mass into six zones along the vertical direction, i.e. the caved zone, the block zone, the vertical fracture through-going zone, the vertical fracture zone, the separation zone and the continuous zone. The horizontally zoning model divides the roof strata movement into three zones, i.e. the calm zone, the generation zone impacted by working face and the historical generation zone. After that, based on the horizontally zoning model, a method is developed to determine the displacement angle using the microseismic monitoring data, which has been verified in the Dongjiahe Coal Mine. © 2017 Elsevier Ltd


Hou E.-K.,Xi'an University of Science and Technology | Tong R.-J.,Xi'an University of Science and Technology | Feng J.,Xi'an University of Science and Technology | Feng J.,Shaanxi Coal and Chemical Technology Institute Co. | Che X.-Y.,Xi'an University of Science and Technology
Meitan Xuebao/Journal of the China Coal Society | Year: 2017

The burnt rock aquifer is an important ecological water resources in Yushenfu mining area. In order to study the water loss and protection of burnt rock, this paper analyzed classification, distribution, hydraulic connection and water enrichment feature of burnt rock. Numerical simulation method was used to predict water loss which caused by mining and then concluding three approaches of “offsite storage” burnt rock water. The research shows that burnt rock can be divided into 3 categories and 5 small classes, among them sinter rock and similar lava rock are main water storage carriers. The distribution of burnt rock is controlled by topography, while the scale is affected by coal seam thickness, exposed height and spontaneous combustion conditions. Besides, water abundance of burnt rock is determined by supply condition, excretion condition and water storage condition. The result also shows the burnt rock aquifer is subjected to the recharge of the overlying aquifer and excreting by spring and mine drainage. Additionally, draining water quantity and borehole design was summarized by numerical simulation. On the basis of experience of water-preserved mining, three methods could be summarized to protect and utilize water resource of burnt rock, which are reservoir water storage, goaf water storage and surface water irrigation. © 2017, Editorial Office of Journal of China Coal Society. All right reserved.


Wang L.,Tohoku University | Wang L.,Shaanxi Coal and Chemical Technology Institute Co. | Chen J.,Tohoku University | Watanabe H.,University of Tsukuba | And 4 more authors.
Applied Catalysis B: Environmental | Year: 2014

The Co-Fe/Mg/Al catalysts were prepared from the hydrotalcite-like compounds containing Co, Fe, Mg and Al, and applied to the steam gasification of biomass-derived tar. The characterization using TPR, TPO, XRD, H2 adsorption, TEM and EXAFS indicates that the Co-Fe/Mg/Al catalysts have a nanocomposite structure of the Co-Fe bcc alloy particles and the oxide particles of MgAl2O4-based solid solution after the reduction, where Co metal atoms can substitute partially Fe metal sites in bcc Fe metal regarding the Co-Fe bcc alloy particles. The composition of the Co-Fe/Mg/Al catalysts was optimized on the basis of the activity tests. The optimized Co-Fe/Mg/Al catalyst exhibited higher catalytic performance than the reported catalysts such as Co-Fe/α-Al2O3, Co/Mg/Al, Ni-Fe/Mg/Al in terms of activity and resistance to coke deposition. This behavior can be explained by the formation of the Co-Fe bcc alloy nanoparticles with rather uniform composition on MgAl2O4-based solid solution. © 2014 Elsevier B.V.


Yang Y.,Shaanxi Coal and Chemical Technology Institute Co. | Fu D.,Shaanxi Coal and Chemical Technology Institute Co. | Zhang Y.,Shaanxi Coal and Chemical Technology Institute Co. | Meng C.,Dalian University of Technology
Zeitschrift fur Anorganische und Allgemeine Chemie | Year: 2014

The mixed-ligand pentaborate, [Cu(C12N2H 8)2(C2H3O2)][B 5O6(OH)4]·C4H9NO (1), was synthesized and characterized by single-crystal X-ray diffraction, elemental analyses, powder X-ray diffraction, infrared spectroscopy, and thermogravimetric analysis. Two adjacent [B5O6(OH) 4]- polyborate anions are connected with each other by hydrogen bonds forming a novel zero-dimensional (0D) dimer {2[B 5O6(OH)4]-} which is further connected with [Cu(C12N2H8)2(C 2H3O2)]+ cations through hydrogen bonds to form a one-dimensional (1D) ribbon-like supramolecular structure with twenty-membered rings. The [Cu(C12N2H8) 2(C2H3O2)]+ cations are extended through π···π stacking interactions between the 1, 10-phenanthroline ligands forming a two-dimensional (2D) supramolecular network. The 1D supramolecular ribbons and the 2D supramolecular layers are further extended into a three-dimensional (3D) supramolecular framework through hydrogen-bonding interactions. Compound 1 is the first example of a borate where strong hydrogen bonds and π···π stacking interactions play important coordination roles in the formation of the 3D supramolecular framework. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.


Liu L.,Fudan University | Liu L.,Shaanxi Coal and Chemical Technology Institute Co. | Yu M.,Fudan University | Zhang Y.,Fudan University | And 2 more authors.
ACS Applied Materials and Interfaces | Year: 2014

In view of the biological significance of glycosylation for human health, profiling of glycoproteome from complex biological samples is highly inclined toward the discovery of disease biomarkers and clinical diagnosis. Nevertheless, because of the existence of glycopeptides at relatively low abundances compared with nonglycosylated peptides and glycan microheterogeneity, glycopeptides need to be highly selectively enriched from complex biological samples for mass spectrometry analysis. Herein, a new type of hydrazide functionalized core-shell magnetic nanocomposite has been synthesized for highly specific enrichment of N-glycopeptides. The nanocomposites with both the magnetic core and the polymer shell hanging high density of hydrazide groups were prepared by first functionalization of the magnetic core with polymethacrylic acid by reflux precipitation polymerization to obtain the Fe3O 4@poly(methacrylic acid) (Fe3O4@PMAA) and then modification of the surface of Fe3O4@PMAA with adipic acid dihydrazide (ADH) to obtain Fe3O4@poly(methacrylic hydrazide) (Fe3O4@PMAH). The abundant hydrazide groups toward highly specific enrichment of glycopeptides and the magnetic core make it suitable for large-scale, high-throughput, and automated sample processing. In addition, the hydrophilic polymer surface can provide low nonspecific adsorption of other peptides. Compared to commercially available hydrazide resin, Fe 3O4@PMAH improved more than 5 times the signal-to-noise ratio of standard glycopeptides. Finally, this nanocomposite was applied in the profiling of N-glycoproteome from the colorectal cancer patient serum. In total, 175 unique glycopeptides and 181 glycosylation sites corresponding to 63 unique glycoproteins were identified in three repeated experiments, with the specificities of the enriched glycopeptides and corresponding glycoproteins of 69.6% and 80.9%, respectively. Because of all these attractive features, we believe that this novel hydrazide functionalized core-shell magnetic nanocomposite will shed new light on the profiling of N-glycoproteome from complex biological samples in high throughput. © 2014 American Chemical Society.


Lei R.,Shaanxi Coal and Chemical Technology Institute Co. | Gao L.-X.,CAS Changchun Institute of Applied Chemistry | Jin R.-Z.,CAS Changchun Institute of Applied Chemistry | Qiu X.-P.,CAS Changchun Institute of Applied Chemistry
Chinese Journal of Polymer Science (English Edition) | Year: 2014

A series of sulfonated polyimide copolymers as novel proton exchange materials were synthesized by the polycondensation of 1,4,5,8-naphthalene- tetracarboxylic dianhydride (NTDA), sulfonated diamine based on pyridine group and diamine containing N-phenyl-1,2,4-triazole moiety. Flexible, transparent and tough membranes with high thermal stability and good mechanical properties were obtained. They exhibited good stability in boiling water and Fenton's reagent at 80 °C. More interestingly, a nonlinear relationship between proton conductivities of the resulting membranes and the degree of sulfonation (DS) was observed. The membrane with 50% DS exhibited the maximum proton conductivity, which was due to the combinational contributions of sulfonic acid and N-pheny-1,2,4-triazole groups. Thus, the N-phenyl-1,2,4-triazole moiety in this study not only can depress water absorption but also increase proton conductivity, especially at low DS. © 2014 Chinese Chemical Society, Institute of Chemistry, Chinese Academy of Sciences and Springer-Verlag Berlin Heidelberg.


Duan M.-Z.,Shaanxi Coal and Chemical Technology Institute Co. | Xu M.-J.,Shaanxi Coal and Chemical Technology Institute Co.
Xiandai Huagong/Modern Chemical Industry | Year: 2015

The structure and superiority of slurry reactor, as well as its existing problems have been introduced in this paper. Furthermore, research achievement of F-T slurry bed reactor in China in aspects of structure improvement, simulation and expansion of syngas conversion have been presented. In the end, the future of slurry bed has been forecasted. ©, 2015, China National Chemical Information Center. All right reserved.


Chang J.,CAS Institute of Geology and Geophysics | Chang J.,University of Chinese Academy of Sciences | Li W.,China University of Mining and Technology | Li T.,Shaanxi Coal and Chemical Technology Institute Co. | And 2 more authors.
Caikuang yu Anquan Gongcheng Xuebao/Journal of Mining and Safety Engineering | Year: 2014

Large-scale mining has produced great influence on local fragile eco-environment in Northern Shaanxi, such as leakage of aquifer and reduction of flows. Under this background, to acquire the migration situations of water resources in arid mining area, taking Shennan Mining Area in Northern Shaanxi as example, a series of works were carried out to study the division evaluation of water resources' leakage degree, water resources quantity forecasting after mining, and analysis and comparison of water quality in goaf. The results show that the gross quantity of water resources in the mining area increases after mining, and the water in goaf is the main source of the growth. Consequently, the gross amount of water resources is proposed as the evaluation standard of "water preserved mining". If the gross amount of water resources before mining is greater than that after mining, the water resources are running off on the whole. On the contrary, it is considered that the mining process can improve the occurrence condition of water resources in some specified region, that is, the coal mining is beneficial to water resources protection. From above standard, water resources environment in Shennan Mining Area is improved.


Kou L.,Zhejiang University | Kou L.,Shaanxi Coal and Chemical Technology Institute Co. | Liu Z.,Zhejiang University | Huang T.,Zhejiang University | And 4 more authors.
Nanoscale | Year: 2015

Supercapacitors with porous electrodes of graphene macroscopic assembly are supposed to have high energy storage capacity. However, a great number of "close pores" in porous graphene electrodes are invalid because electrolyte ions cannot infiltrate. A quick method to prepare porous graphene electrodes with reduced "close pores" is essential for higher energy storage. Here we propose a wet-spinning assembly approach based on the liquid crystal behavior of graphene oxide to continuously spin orientational graphene hydrogel films with "open pores", which are used directly as binder-free supercapacitor electrodes. The resulting supercapacitor electrodes show better electrochemical performance than those with disordered graphene sheets. Furthermore, three reduction methods including hydrothermal treatment, hydrazine and hydroiodic acid reduction are used to evaluate the specific capacitances of the graphene hydrogel film. Hydrazine-reduced graphene hydrogel film shows the highest capacitance of 203 F g-1 at 1 A g-1 and maintains 67.1% specific capacitance (140 F g-1) at 50 A g-1. The combination of scalable wet-spinning technology and orientational structure makes graphene hydrogel films an ideal electrode material for supercapacitors. This journal is © The Royal Society of Chemistry.


Yang Y.,Shaanxi Coal and Chemical Technology Institute Co. | Fu D.,Shaanxi Coal and Chemical Technology Institute Co. | Li G.,Shaanxi Coal and Chemical Technology Institute Co. | Zhang Y.,Shaanxi Coal and Chemical Technology Institute Co.
Zeitschrift fur Anorganische und Allgemeine Chemie | Year: 2013

The organically templated pentaborate [C10N2H 9][B5O6(OH)4]-H3BO 3-H2O (1a) was synthesized by boric acid and 4, 4′-bipyridine in aqueous solution and characterized by single-crystal X-ray diffraction, elemental analysis, FTIR spectroscopy, thermogravimetric analysis, powder X-ray diffraction, and photoluminescence spectroscopy. The compound crystallizes in the triclinic system with space group P1 (a = 9.196(3) Å, b = 9.822(3) Å, c = 12.113(3) Å, α = 66.243(3)°, β = 76.998(3)°, γ = 75.067(3)°, V = 958.4(5) Å3, and Z = 2). The polyanions form a novel 3D supramolecular network with three kinds of channels by extensive hydrogen bonds. The title compound shows a UV photoluminescence with an emission maximum at 372 nm upon excitation at 248 nm, and the photoluminescence can be modified from UV to blue by means of a simple heat-treatment process. The pentaborate could be a promising blue component for possible application in the white LED. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

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