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International Conference on Electric Technology and Civil engineering (ICETCE)

作者： Tong-bin Zhao Yun-liang Tan Ze Zhang Key laboratory of Mining Disaster Prevention and Control Ministry of Education Shandong University of Science and Technology Qingdao China College of Resources and Environmental Engineering Shandong University of Science and Technology Qingdao China

ISBN: (纸本)9781457702891

In order to study the distribution and transfer law of interface stress, the mechanical test platform for anchorage system was developed on the basis of the pressure test server, and double interface pull-out test of the anchorage was carried out in laboratory. Results show, the distribution of shear stress on the interface is uneven, transferred in the form of first increased and then decreased, and mainly concentrated in the one third of pulling-out scope. The shear stress distribution of two anchorage system interfaces is similar. The interface stress of anchorage matrix is the attenuation result of the bolt interface one. The attenuation of maximum shear stress reaches 40% ~ 60%. The stability of the experimental platform is good. It can be installed easily and the operation of it is simple. It is suitable for testing on mechanical problems of anchorage interface in laboratory.

关键词： Stress Rocks Fasteners Nickel Laboratories Attenuation

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Risk analysis of ground subsidence accidents caused by underground storage caverns in salt rock

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Yantu Lixue/Rock and Soil Mechanics 2011年第SUPPL.2期32卷 544-550页

作者： Jing, Wen-Jun Yang, Chun-He Kong, Jun-Feng Ji, Wen-Dong State Key Laboratory of Geomechanics and Geotechnical Engineering Institute of Rock and Soil Mechanics Chinese Academy of Sciences Wuhan 430071 China Key Lab. for Exploitation of Southwestern Resources and Environmental Disaster Control Eng. Ministry of Education Chongqing University Chongqing 400044 China

In the construction and operation processes of underground storage cavern in bedded salt, ground subsidence, even earth surface collapse accidents, resulted by the storage cavern contraction and overlying rock deformation is an important accident type. Aimed at the ground subsidence accidents caused by underground storage cavern, this paper reveals the mechanism and builds the fault tree model of this type of accidents, finds out 14 failure patterns as well as 10 basic influence factors, also, puts forward the related control measures. Then Yunmeng-Yingcheng salt mine is taken as an example to forecast the severity of accident consequence. On the premise that ground subsidence accident happened at Yunmeng-Yingcheng salt mine, the severity probability of the accident consequence is analyzed using fuzzy comprehensive evaluation. Research results show that the severity of accident consequence belong to negligible level, to be considered level, serious level, very serious level and calamitous level are 0.24, 0.28, 0.29, 0.15, 0.04 respectively. The results are useful to prevent ground subsidence accidents caused by the storage caverns. What's more, it also provides according theory and a feasible way for appraising the loss severity before the accident happening.

关键词： Subsidence

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Qualitative determination of the components of textile products using near infrared spectroscopy

Qualitative determination of the components of textile produ...

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International Symposium on Photonics and Optoelectronics, SOPO 2010

作者： Wang, Dongmin Huang, Furong Chen, HuaCai Jin, Shangzhong Chen, Xingdan Key Laboratory of Disaster Forecast and Control in Engineering Department of Optoelectronic Engineering Jinan University Guangzhou China College of Optical and Electronic Technology China Jiliang University Hangzhou China State Key Laboratory of Applied Optics Changchun Institute of Optics Fine Mechanics and Physics Chinese Academy of Sciences Changchun 130022 China

ISBN: (纸本)9781424449644

In the paper, A total of 40 pure or two-mixed textile weaves were prepared and classification of these samples was introduced using near infrared spectroscopy (NIRS), all textile samples are selected among four classes, which are Cotton-Terylene, Cotton-Polyurethane, Cotton and Terylene, according to theirs components. Near infrared diffuse reflectance spectra of the samples were collected, Mahalanobis distance was used to discriminate the samples coupled with principle components analysis (PCA), the results showed that near infrared spectroscopy could determine which class one textile weave belongs to easily comparing with traditional methods. In addition, the expectation of the further research on qualitative determination of textile products by NIR technology was discussed in the end of this paper. ©2010 IEEE.

关键词： Near infrared spectroscopy

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Fractal kinetic characteristics for dissolving and leaching processes of strontium residue

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Chinese Journal Of Geochemistry 2010年第4期29卷 393-397页

作者： XU Longjun WANG Xingmin QU Ge ZHOU Zhengguo YUE Fenhua Key Laboratory of the Exploitation of Southwest Resources and Environmental Disaster Control Engineering of Ministry of Education Chongqing University Chongqing 400044 China College of Environmental andBiological Engineering Chongqing Technology andBusiness University Chongqing 400033 China

The pore structural characteristics of strontium residue were studied with the N2 adsorption method(ASAP2010).The kinetic properties concerning dissolving and leaching strontium waste were described by determining the concentrations of Sr2+,Ba2+ and soluble sulphides in *** results showed that the specific surface area and pore volume increased with decreasing granule diameter,and the micropore surface of the residue was *** the dissolving and leaching processes of strontium residue,soluble ion concentrations increased with decreasing granule diameter of the residue,and the reaction dimension was lower than the fractal dimension of pore ***2+ and soluble sulphide concentrations significantly exceeded the defined standard values,while Ba2+ concentrations did not,either in the dissolving or leaching *** addition,dissolving and leaching reactions selectively occurred on the micropore surface of strontium residue.

关键词：表面分形维数动力学特性浸出过程可溶性硫化物孔隙结构特征锶离子浓度残渣

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Experimental study of influences for water content in coalbed gas reservoirs on methane seepage

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Yanshilixue Yu Gongcheng Xuebao/Chinese Journal of Rock Mechanics and engineering 2011年第SUPPL. 2期30卷 3401-3406页

作者： Yin, Guangzhi Jiang, Changbao Xu, Jiang Peng, Shoujian Li, Wenpu State Key Laboratory of Coal Mine Disaster Dynamics and Control Chongqing University Chongqing 400030 China College of Resource and Environmental Sciences Chongqing University Chongqing 400030 China State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam Chongqing University Chongqing 400030 China

The studied specimen was briquettes molded by coal from 3# coalbed of Zhaozhuang coal factory, Jincheng Coal Industrial Company. An experimental plan was designed to test the influence of water content on methane permeability. By using self-developed "coal containing gas thermal-hydrological-mechanical(THM) coupling experimental equipment", the change rule of water content effects permeance of coalbed methane was studied. The research results showed that: under the conditions of constant temperature and effective stress but different water contents, the methane effective permeability increased with the decreasing of water content in coal. In the range of water content tested in this experiment, the relationship between water content of coal and methane effective permeability could be expressed by a linear function. The water in coalbed gas reservoirs occupies space of permeance pores in coal seams and decreases methane transportation passages which makes the transportation difficulty. According to the analysis of experimental results, it is theoretically proven that to wet the coal by pouring water could be used as a measure to prevent coal and gas outburst.

关键词： Methane

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Electrocatalytic activity of non-precious metal catalyst Co-N/C toward oxygen reduction reaction

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Chinese Chemical Letters 2010年第8期21卷 983-986页

作者： Yu Jun Si Chang Guo Chen Wei Yin Hui Cai College of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China College of Chemistry and Pharmaceutical Engineering Sichuan University of Science and Engineering Zigong 643000 China The Key Laboratory for the Exploitation of Southwest Resources and Environmental Disaster Control Engineering under Ministry of Education Chongqing University Chongqing 400044 China

Metallic cobalt was deposited on acetylene black to synthesize a composite Co/C by chemical reduction method.A platinumfree electrocatalyst Co-N/C（800） for oxygen reduction reaction（ORR） was synthesized by mixing the composite Co/C with urea and heat-treating at 800℃.The results from linear sweep voltammograms indicated that the Co-N/C（800） is active to ***β-Co and cobalt oxides are not the active site of the catalyst Co-N/***,the existence of cobalt facilitated the modification of nitrogen to carbon black and led to the formation of active site of catalyst Co-N/C（800）.

关键词： Oxygen reduction reaction Electrocatalyst Non-precious metal Active site

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The application of fuzzy technique to coal Gangue hills reliability analysis

The application of fuzzy technique to coal Gangue hills reli...

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Global Congress on Intelligent Systems

作者： Yang, Kun Ma, Zhichao Key Laboratory Mining Disaster Prevention and Control Ministry of Education SUST Qingdao China College of Resource and Environmental Engineering SUST Qingdao China

ISBN: (纸本)9780769543048

Gangue hill is a production in mining area which piles up by the disordered accumulation of coal waste. Because of its poor stability, landslide may easily arise when meet disadvantages and accordingly cause enormous destruction of geological hazard. It was found that the traditional safety factor method risks failure when evaluate the stability of gangue hills if the variability and fuzziness of parameters are not considerded. In this paper a stability analysis method - fuzzy point evaluation method is presented based on reliability theory and fuzzy theory. It is more practical and efficient for gangue hill stability assessment. As a typical example, this method is applied to evaluate the stability of a gangue hill in Songzao Coal Mine , Chongqing. The results show the failure possibility of the hill is very high. © 2010 IEEE.

关键词： Coal mines

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Inducing action of stress wave for coal and gas outbursts

Inducing action of stress wave for coal and gas outbursts

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作者： Zhao, Zhigang Tan, Yunliang Zhao, Tongbin Key Laboratory of Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao 266510 China Key Lab. for the Exploitation of Southwestern Rsrc. and the Environ. Disaster Control Engineering Ministry of Education China

ISBN: (纸本)9789078677383

There are many influence factors for coal and gas outburst, in which the stress wave is the most important one of the non-geological factors. Using the implicit-explicit analytical function of ANSYS/LS-DYNA, the response of roadway surrounding rock under the stress wave is simulated and the inducing effect of stress wave is studied. It is found that, under stress wave, tensile stress and compressive stress occurs in roadway surrounding rock. The vertical pressure of left side midpoint and horizontal pressure of right side midpoint act mainly as tensile pressure, and the pressure value increases along with the stress wave intensity. The horizontal displacement time curve of roof and floor and left side midpoint can be described as this: the value decreases deeply from plus peak to minus peak during Oms -10ms, and the evolution of right side midpoint is reverse to that of left side midpoint. The horizontal velocity time curve of roof and floor midpoint is that the value decreases deeply from peak to trough, then increasing slowly and keep flat. The horizontal velocity time curve of left side midpoint is similar to cosine curve and of right side midpoint is similar to sinusoid curve. © Atlantis Press, 2010.

关键词： Floors

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Test analysis and technical transformation for chilled water pipelines in hot mine

Test analysis and technical transformation for chilled water...

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作者： Qi, Yudong Cheng, Weimin Pan, Gang Wang, Gang Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation Shandong University of Science and Technology Qingdao 266510 China Key Laboratory of Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao 266510 China

ISBN: (纸本)9789078677383

The cooling system in Tangkou mine is composite pipeline with open water supply and close water return. By the test analysis of the chilled water in the system, a series of questions are pointed out, such as the contradiction between water demand for cooling and for other uses, and the cooling water supply is less than 38%, the difficulty in achieving balance of supply and demand, etc. For solving the problems above, a new type composite pipeline with close water supply and open water return is put forward based on the original pipeline. In the new pipeline system, the chilled water for cooling is up to 100%, and the contradiction in water demand is solved well. The technical matters in pipeline transform are also brought forward in this paper. © Atlantis Press, 2010.

关键词： Water supply

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Experimental research on the acoustic emission characteristics of rock under uniaxial compression

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Meitan Xuebao/Journal of the China Coal Society 2011年第SUPPL. 2期36卷 237-240页

作者： Chen, Yu-Long Wei, Zuo-An Xu, Jiang Tang, Xiao-Jun Yang, Hong-Wei Li, Shu-Chun State Key Laboratory for Coal Mine Disaster Dynamics and Control Chongqing University Chongqing 400030 China College of Resource and Environmental Sciences Chongqing University Chongqing 400030 China State and Local Joint Engineering Laboratory of Methane Drainage in Complex Coal Gas Seam Chongqing University Chongqing 400030 China Department of Building Engineering Chongqing Industry Polytechnic College Chongqing 401120 China

All characteristics of acoustic emission in the procedure of rock stress-strain and effect of loading rates were studied experimentally under uniaxial compression by using PAC acoustic emission acquisition system and MTS equipment. The relationship of axial stress with axial strain, transverse strain and volume strain of rock, as well as the characteristics of acoustic emission at four stages of the stress-strain curve were obtained. In initial consolidation and elastic phase, it is found out that hits seldom happens, energy keeps low, amplitude is small and no event is produced. In strain hardening phase, hits instantly increases, energy go up, amplitude enhanced and events happen. In strain softening phase hits decrease, energy became low, amplitude went back small and events happen. Due to the differences among acoustic emission characteristics in individual rock-transforming phases, acoustic emission method can be used to study micro-damage evolvement and predict macro-destabilization of engineering rock mass on spot. The failure damage evolution rule of sandstone under the different loading rates is studied based on the acoustic emission characteristics. The increase of loading rate can promote the rate of crack extension and damage, so there are more AE counts. But, intense AE events being, the energy release at the peak place and strain value decrease.

关键词： Sandstone

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