Journal of China University of Mining and Technology最新文献_第6页

Adsorption mechanism of different coal ranks under variable temperature and pressure conditions 不同煤阶在变温变压条件下的吸附机理

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60083-8

ZHANG Qing-ling

引用次数: 28

Evaluating the treatment of E-waste — a case study of discarded refrigerators 评估电子垃圾的处理——以废弃冰箱为例

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60094-2

DENG Jian-jun , WEN Xue-feng , ZHAO Yue-min

{"title":"Evaluating the treatment of E-waste — a case study of discarded refrigerators","authors":"DENG Jian-jun , WEN Xue-feng , ZHAO Yue-min","doi":"10.1016/S1006-1266(08)60094-2","DOIUrl":"10.1016/S1006-1266(08)60094-2","url":null,"abstract":"<div><p>Disassembly and recycling of E-waste creates a series of environmental problems. The selection of a technologically reliable, environmentally friendly, economically affordable and socially acceptable recycling technology for E-waste is a significant question. This study establishes a Monte-Carlo mathematical model of cost minimization, given the constraints of environmentally sound handling of the e-waste, in the context of Crystal Ball risk assessment and evaluation software. By following the streams of the different treatment processes, which consist of various technologies including disassembly, recycling and disposal, the economics of various possibilities were identified and the optimal recycling technology proposed. The key factors of the proposed scenarios were determined by using sensitivity analysis. The results of this study show that, for discarded refrigerators, the operating life span plays the key role. The model supports maintenance and resale of the short lived refrigerators. For the longer lived refrigerators material recycling is recommended by the model. Sensitivity analysis shows that purchase cost, plastic sale price, condenser sale price and disassembly costs are the main effects. This study provides a significant technical support for policy making in E-waste management.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 454-458"},"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)60094-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83619707","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

Physical simulation of rock burst induced by stress waves 应力波诱发地压的物理模拟

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60084-X

LU Ai-hong, MAO Xian-biao, LIU Hai-shun

{"title":"Physical simulation of rock burst induced by stress waves","authors":"LU Ai-hong, MAO Xian-biao, LIU Hai-shun","doi":"10.1016/S1006-1266(08)60084-X","DOIUrl":"10.1016/S1006-1266(08)60084-X","url":null,"abstract":"<div><p>The behavior of stress wave propagation in rock walls and the process of rock bursts were simulated by application tests of material similar to rock. Results show that 1) the attenuation characteristics of stress waves were related to the material properties, stress waves attenuate more quickly in soft material and 2) when the explosion load was applied at the top of the roadway, the number and the length of the cracks increased with a decrease in the distance between the explosive point and roof of the roadway. When the distance was 280 mm, only some chips appeared near the source, when the distance was 210 mm, some small cracks started to appear near the road-rib and when the distance was reduced to 140 mm, larger cracks appeared at the road-rib. It can be concluded that, under a given stress the number of cracks is closely related to the intensity of stress waves. The cracks in the surrounding rock can be reduced by controlling the intensity of the stress waves and rock bursts can be avoided to some extent by preventing the formation of layered crack structures. A new experimental approach has been provided for studying rock bursts by using physical simulation.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 401-405"},"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)60084-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88164255","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: 17

Study on fault induced rock bursts 断层诱发地压研究

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60068-1

LI Zhi-hua , DOU Lin-ming , LU Cai-ping , MU Zong-long , CAO An-ye

引用次数: 33

Failure analysis of air fan blades 风机叶片失效分析

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60096-6

WANG Yan-qing , JI Zhe , CUI Yong-li , CUI Chun-zhi , SUN Zhi

引用次数: 5

Mechanism of hydro-viscous soft start of belt conveyor 带式输送机液粘软启动机理研究

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60095-4

MENG Qing-rui, HOU You-fu

引用次数: 15

Classification of conditions for short-wall continuous mechanical mining in shallowly buried coal seam with thin bedrock 薄基岩浅埋煤层短壁连续机械开采条件分类

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60082-6

LIU Yu-de , ZHANG Dong-sheng , MA Li-qiang , ZHAO Yong-feng , WANG Hong-sheng

{"title":"Classification of conditions for short-wall continuous mechanical mining in shallowly buried coal seam with thin bedrock","authors":"LIU Yu-de , ZHANG Dong-sheng , MA Li-qiang , ZHAO Yong-feng , WANG Hong-sheng","doi":"10.1016/S1006-1266(08)60082-6","DOIUrl":"10.1016/S1006-1266(08)60082-6","url":null,"abstract":"<div><p>The room and pillar method is usually used to extract coal from shallowly buried seams with thin bedrock. This results in a very low production efficiency and in a low degree of extraction. In recent years short-wall continuous mechanical mining has been extensively used in many situations except shallowly buried coal seams with thin bedrock. The principles governing movement of the overlying strata above the 2-2 coal seam were deduced from in-situ experience, laboratory data, calculations and computer simulations. The thicknesses of the bedrock in the Shendong Coal Field where the coal is shallowly buried are classified into 5 types: <10 m, 10-15 m, 15-25 m, 25-35 m and >35 m, which was done using fuzzy clustering results. A series of reasonable, relative parameters in each category have been calculated and analyzed. One proposed way to perform short-wall continuous mechanical mining in shallowly buried coal seams is given. This is significant for coal mines with similar geological conditions.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 389-394"},"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)60082-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85420131","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: 8

Distribution of wire deformation within strands of wire ropes 钢丝绳股内钢丝变形的分布

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60098-X

MA Jun , GE Shi-rong , ZHANG De-kun

引用次数: 35

Numerical simulation of rock deformation during the mineralization of the Xiangshan uranium deposit, Jiangxi province, south China 江西象山铀矿床成矿过程中岩石变形的数值模拟

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60072-3

ZHOU Ye , LIN Ge , YANG Li-qiang

{"title":"Numerical simulation of rock deformation during the mineralization of the Xiangshan uranium deposit, Jiangxi province, south China","authors":"ZHOU Ye , LIN Ge , YANG Li-qiang","doi":"10.1016/S1006-1266(08)60072-3","DOIUrl":"10.1016/S1006-1266(08)60072-3","url":null,"abstract":"<div><p>The Xiangshan uranium deposit in Jiangxi province is one of the most important uranium deposits in China. The aim of our study is to obtain a better understanding of rock deformation and dilation associated with mineralization, to predict the most favorable locations of mineralization, and to assist with future mineral exploration in this deposit. On the basis of geological and structural data from previous studies, we have constructed a coupled deformation and fluid flow numerical model and simulated the faulting deformation and major mechanical factors controlling mineralization in the deposit. Particular attention has been paid to variations in regional stress, distributions of shear strain, volumetric strain and pore pressure. The relationship between the structural/faulting movement and mineralization is obtained through analyzing the deformation state of fault zones. The results suggest that the mineralization is related to volumetric strain, shear strain and pore pressures. The locations displaying all these factors represent the most favorable sites for mineralization. These model results are important for guiding the exploration of new uranium deposits in Xiangshan.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 3","pages":"Pages 342-346"},"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)60072-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86938220","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: 3

Structural motion of water-resisting key strata lying on overburden 覆岩上阻水关键层的构造运动

Journal of China University of Mining and Technology Pub Date : 2008-09-01 DOI: 10.1016/S1006-1266(08)60074-7

PU Hai , MIAO Xie-xing , YAO Bang-hua , TIAN Mu-jun

引用次数: 5