Journal of China University of Mining and Technology最新文献_第5页

Kinetics and mechanism of the adsorption of methylene blue onto ACFs ACFs吸附亚甲基蓝的动力学及机理

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60090-5

YANG Zhi-yuan

引用次数: 24

Energy analysis of mechanical alloying of molybdenum disilicide in a new-type high energy vibrating ball mill 新型高能振动球磨机机械合金化二硅化钼的能量分析

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60093-0

FENG Pei-zhong , WANG Xiao-hong , QIANG Ying-huai , QU Xuan-hui

引用次数: 7

Characteristics of the main polluting trace elements in the water environment of mining subsidence pools 开采沉陷池水环境中主要污染微量元素特征

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60076-0

YAO En-qin , GUI He-rong

引用次数: 4

Analysis of underground fires in Polish hard coal mines 波兰坚硬煤矿地下火灾分析

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60070-X

WACHOWICZ Jan

引用次数: 35

Fault diagnosis of a mine hoist using PCA and SVM techniques 基于主成分分析和支持向量机的矿井提升机故障诊断

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60069-3

CHANG Yan-wei , WANG Yao-cai , LIU Tao , WANG Zhi-jie

引用次数: 45

Mechanism of CO2 enhanced CBM recovery in China: a review 中国CO2促进煤层气开采的机理研究进展

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60085-1

QIN Yong

{"title":"Mechanism of CO2 enhanced CBM recovery in China: a review","authors":"QIN Yong","doi":"10.1016/S1006-1266(08)60085-1","DOIUrl":"10.1016/S1006-1266(08)60085-1","url":null,"abstract":"<div><p>Permeability of coal reservoirs in China is in general low. Injection of CO<sub>2</sub> into coal seams is one of the potential approaches for enhancing coalbed methane (CBM) production. The feasibility of this technology has been investigated in China since the 1990s. Advances in mechanism of CO<sub>2</sub> enhanced CBM recovery (CO<sub>2</sub>-ECBM) in China are reviewed in light of certain aspects, such as the competitive multi-component gas adsorption, sorption-induced coal swelling/shrinkage and its potential effect on CBM production and numerical simulation for CO<sub>2</sub>-ECBM recovery. Newer investigations for improving the technology are discussed. It is suggested that a comprehensive feasibility demonstration in terms of geology, technology, economics and environment-carrying capacity is necessary for a successful application of the technology for CBM recovery in China. The demonstration should be carried out after more investigations into such facets as the control of coal components and structure to a competitive multi-component-gas adsorption, the behavior and essence of supercritical adsorption by coal of gas, environmental and safe feasibility of coal mining after CO<sub>2</sub> injection and more extensive pilot tests for CO<sub>2</sub>-ECBM recovery.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 406-412"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60085-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86909117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 25

Numerical simulation analysis by solid-liquid coupling with 3DEC of dynamic water crannies in overlying strata 上覆岩层动水裂隙固液耦合3DEC数值模拟分析

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60073-5

MA Li-qiang , ZHANG Dong-sheng , JING Sheng-guo , ZHANG Wei , FAN Gang-wei

{"title":"Numerical simulation analysis by solid-liquid coupling with 3DEC of dynamic water crannies in overlying strata","authors":"MA Li-qiang , ZHANG Dong-sheng , JING Sheng-guo , ZHANG Wei , FAN Gang-wei","doi":"10.1016/S1006-1266(08)60073-5","DOIUrl":"10.1016/S1006-1266(08)60073-5","url":null,"abstract":"<div><p>To solve the problem of water loss during mining of shallow, buried coal seams, we have first analyzed the mechanism and suitability of solid-liquid coupling, i.e., we used the FLUID-MECHANICS system of 3-Dimensional Distinct Element Code (3DEC) in simulating dynamic water crannies in overlying strata, under mining conditions of a large longwall coalface. Next the dynamic initiation of a water cranny, its propagation and close phases were studied with 3DEC, along with the overlying strata breakage and recombination as the mining space of the shallow, buried coal seam increased. Combined with the change in the stress and displacement fields, the distribution features of the mining cranny were systematically studied. The effect of regularities and their effective measures of local filling and mine slicing technology in controlling mine crannies were investigated and the potential danger areas of water loss identified. Our results can be applied to decrease water loss during the exploitation of shallow, buried coal seams with a thin bedrock. The results also prove that 3DEC is a credible numerical analytical method to predict initiations of dynamic water crannies, their propagation, their closure phases and other concomitant hazards.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 347-352"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60073-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80894015","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 13

Comparison between open phase fault of arc suppression coil and single phase to earth fault in coal mine distribution network 煤矿配电网消弧线圈断相故障与单相接地故障的比较

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60077-2

LI Xiao-bo, WANG Chong-lin

引用次数: 7

An OGC standard-oriented architecture for distributed coal mine map services 面向OGC标准的分布式煤矿地图服务体系结构

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60080-2

SONG Xian-feng , RUI Xiao-ping , HOU Wei , TAN Hai-qiao

{"title":"An OGC standard-oriented architecture for distributed coal mine map services","authors":"SONG Xian-feng , RUI Xiao-ping , HOU Wei , TAN Hai-qiao","doi":"10.1016/S1006-1266(08)60080-2","DOIUrl":"10.1016/S1006-1266(08)60080-2","url":null,"abstract":"<div><p>GIS- or CAD-based technology has been widely used for cartographic maps in coal mines, but structural gaps between such maps make it difficult to provide an integrated map service, for any specific purpose, at higher levels. There is no uniform platform that can be used to manage all involved maps. The main reason for this is that datasets are submitted by individual coal mines using their individual, diverse software. No consistent model is used within the software for data abstraction and symbolization. This paper first reviews all the essential specifications concerning OGC (Open Geospatial Consortium) interoperability. Then an OGC standard-oriented architecture is proposed to provide distributed coal mine map services. Within this new architecture the management of spatial data archives, and the integration of coal mine maps, are achieved through the interfaces of geospatial services. Finally an open source geospatial approach is suggested to implement the proposed scheme. A case study of the Huaibei Coal Group is used to demonstrate the proposal.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 381-385"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60080-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89459732","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Hot-corrosion mechanism of Ni-Cr coatings at 650°C under different simulated corrosion conditions 650℃不同模拟腐蚀条件下Ni-Cr涂层的热腐蚀机理

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60092-9

OU Xue-mei, SUN Zhi, SUN Min, ZOU Duan-lian

{"title":"Hot-corrosion mechanism of Ni-Cr coatings at 650°C under different simulated corrosion conditions","authors":"OU Xue-mei, SUN Zhi, SUN Min, ZOU Duan-lian","doi":"10.1016/S1006-1266(08)60092-9","DOIUrl":"10.1016/S1006-1266(08)60092-9","url":null,"abstract":"<div><p>The oxidation and lower temperature hot corrosion (LTHC) processes occurring on the surface of Ni-Cr coatings produced by high velocity arc spray (HVAS) were studied. Several different conditions were studied under simulated boiler conditions at 650°C. The protection effect of an Al coating deposited by HVAS onto the Ni-Cr coating was also investigated. Microscope, X-ray diffraction and corrosion rate curves have been used to analyze corrosion mechanisms. The experimental results show that: 1) The oxidation rates are almost superposed in both air (no SO<sub>3</sub>) and in simulated coal-fired gas (containing SO<sub>3</sub>) as long as no salt was present on the surface. These rate curves show a logarithmic relationship. 2) When the surface is coated with salt (75%K<sub>2</sub>SO<sub>3</sub> + 25%Na<sub>2</sub>SO<sub>3</sub>) the rate curve for LTHC of the Ni-Cr coated surface shows a parabolic shape in the simulated coal-fire flue gas. In air only the oxidation reaction takes place, the second type of LTHC was not seen. And 3) the Al over coating on the Ni-Cr enhances resistance to LTHC because an inter-metallic compound, Al<sub>3</sub>Ni<sub>2</sub>, forms at the Al/Ni-Cr interface and because of the increase in coating thickness.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 444-448"},"PeriodicalIF":0.0,"publicationDate":"2008-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60092-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80284851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 19