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Catalytic effects of trace ruthenium on oxidation of dimethyl yellow with bromate and its application 微量钌对溴酸盐氧化二甲黄的催化作用及其应用
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60304-1
Zhi-rong ZHOU , Qun WANG , Shu-yuan ZHANG
{"title":"Catalytic effects of trace ruthenium on oxidation of dimethyl yellow with bromate and its application","authors":"Zhi-rong ZHOU ,&nbsp;Qun WANG ,&nbsp;Shu-yuan ZHANG","doi":"10.1016/S1006-1266(08)60304-1","DOIUrl":"10.1016/S1006-1266(08)60304-1","url":null,"abstract":"<div><p>A spectrophotometric method for the determination of ruthenium(III) is described, based on its catalytic effect on the oxidation reaction of dimethyl yellow (DMY) with potassium bromate in an acid solution medium and in the presence of an OP emulsifier (<em>p</em>-<em>iso</em>-octyl phenoxy polyethoxy ethanol) at 100 °C. This reaction was followed spectrophotometrically by measuring the decrease in the absorbance at 530 nm of the catalytic reaction of DMY. The calibration curve for the recommended method was linear in the concentration range over 0.0–1.0 μg/Land the detection limit of the method for Ru(III) was 0.01 μg/L. The method is highly sensitive, selective and very stable and has been successfully applied for the determination of trace amounts of ruthenium in some ores and metallurgy products with the relative standard deviations (RSD) over 1.6%–2.8% and a recovery over 98.7%–104.0%.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 4","pages":"Pages 613-617"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60304-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82043779","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: 4
Sensor deployment strategy for chain-type wireless underground mine sensor network 链式无线井下矿井传感器网络的传感器部署策略
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60294-1
Guang-zhu CHEN, Zhen-cai ZHU, Gong-bo ZHOU, Chun-feng SHEN, Yan-jing SUN
{"title":"Sensor deployment strategy for chain-type wireless underground mine sensor network","authors":"Guang-zhu CHEN,&nbsp;Zhen-cai ZHU,&nbsp;Gong-bo ZHOU,&nbsp;Chun-feng SHEN,&nbsp;Yan-jing SUN","doi":"10.1016/S1006-1266(08)60294-1","DOIUrl":"10.1016/S1006-1266(08)60294-1","url":null,"abstract":"<div><p>Wireless sensor networks (WSNs) are very important for monitoring underground mine safety. Sensor node deployment affects the performances of WSNs. In our study, a chain-type wireless underground mine sensor network (CWUMSN) is first presented. A CWUMSN can monitor the environment and locate miners in underground mines. The lowest density deployment strategies of cluster head nodes are discussed theoretically. We prove that the lifetime of CWUMSN with a non-uniform deployment strategy is longer than with a uniform deployment strategy. Secondly, we present the algorithm of non-uniform lowest density deployment of cluster head nodes. Next, we propose a dynamic choice algorithm of cluster head nodes for CWUMSN which can improve the adaptability of networks. Our experiments of CWUMSN with both non-uniform lowest density and uniform lowest density deployments are simulated. The results show that the lifetime of CWUMSN with non-uniform lowest density deployment is almost 2.5 times as long as that of the uniform lowest density deployment. This work provides a new deployment strategy for wireless underground mine sensor networks and then effectively promotes the application of wireless sensor networks to underground mines.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 4","pages":"Pages 561-566"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60294-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84101230","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: 60
Waste-filling in fully-mechanized coal mining and its application 煤矿综采废石充填及其应用
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60279-5
Xie-xing MIAO , Ji-xiong ZHANG , Mei-mei FENG
{"title":"Waste-filling in fully-mechanized coal mining and its application","authors":"Xie-xing MIAO ,&nbsp;Ji-xiong ZHANG ,&nbsp;Mei-mei FENG","doi":"10.1016/S1006-1266(08)60279-5","DOIUrl":"10.1016/S1006-1266(08)60279-5","url":null,"abstract":"<div><p>A fully-mechanized coal mining (FMCM) technology capable of filling up the goaf with wastes (including solid wastes) is described. Industrial tests have proved that by using this technology not only can waste be re-used but also coal resources can be exploited with a higher recovery rate without removing buildings located over the working faces. Two special devices, a hydraulic support and a scraper conveyor, run side-by-side on the same working face to simultaneously realize mining and filling. These are described in detail. The tests allow analysis of rock pressure and ground subsidence when backfilling techniques are employed. These values are compared to those from mining without using backfilling techniques, under the same geological conditions. The concept of equivalent mining height is proposed based on theoretical analysis of rock pressure and ground subsidence. The upper limits of the rock pressure and ground subsidence can be estimated in backfilling mining using this concept along with traditional engineering formulae.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 4","pages":"Pages 479-482"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60279-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87742156","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: 50
Comprehensive analysis of slope stability and determination of stable slopes in the Chador-Malu iron ore mine using numerical and limit equilibrium methods 用数值法和极限平衡法对Chador-Malu铁矿边坡稳定性进行综合分析，确定稳定边坡
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60281-3
M. Ataei, S. Bodaghabadi
{"title":"Comprehensive analysis of slope stability and determination of stable slopes in the Chador-Malu iron ore mine using numerical and limit equilibrium methods","authors":"M. Ataei, S. Bodaghabadi","doi":"10.1016/S1006-1266(08)60281-3","DOIUrl":"https://doi.org/10.1016/S1006-1266(08)60281-3","url":null,"abstract":"","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"159 1","pages":"488-493"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73472481","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: 21
Time-depth conversion of transient electromagnetic method used in coal mines 煤矿用瞬变电磁法进行时深转换
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60291-6
Jing-cun YU, Yang-zhou WANG, Jian LIU, Xiao-bo ZENG
{"title":"Time-depth conversion of transient electromagnetic method used in coal mines","authors":"Jing-cun YU,&nbsp;Yang-zhou WANG,&nbsp;Jian LIU,&nbsp;Xiao-bo ZENG","doi":"10.1016/S1006-1266(08)60291-6","DOIUrl":"10.1016/S1006-1266(08)60291-6","url":null,"abstract":"<div><p>Accuracy of time-depth conversion in data processing of transient electromagnetic prospecting always affects the accurate positioning of water bodies in coal mines. In order to improve the accuracy of time-depth conversion, we established a mathematical model of time-depth conversion for a transient electromagnetic method based on the theory of “double smoke ring effect” of full space transient electromagnetic field transmission. Using a 3-layer as well as a 4-layer geo-electric model for roadway floors, we performed the time-depth conversion of theoretical curves of apparent resistance varying over time. In these curves, the depth corresponding to extreme value points is nearly the same as the depth of a geo-electric model. The position of water body determined by our time-depth conversion method agrees well with the result of borehole drilling, indicating that the established time-depth conversion model can clearly improve the accuracy of spatial positioning of water bodies in coal mines.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 4","pages":"Pages 546-550"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60291-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90180036","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: 14
Quick determination of gas pressure before uncovering coal in cross-cuts and shafts 在横切和竖井开煤前快速测定瓦斯压力
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60282-5
Chenglin Jiang, Chen Wang, Xiaowei Li, Chen Yujia, Qing-Yin Xie, Ying Liu, Tang Jun, Fei Yang, Fakai Wang, Suoping Deng, Zhang Chaojie, S. Cheng, Shusheng Lv
{"title":"Quick determination of gas pressure before uncovering coal in cross-cuts and shafts","authors":"Chenglin Jiang, Chen Wang, Xiaowei Li, Chen Yujia, Qing-Yin Xie, Ying Liu, Tang Jun, Fei Yang, Fakai Wang, Suoping Deng, Zhang Chaojie, S. Cheng, Shusheng Lv","doi":"10.1016/S1006-1266(08)60282-5","DOIUrl":"https://doi.org/10.1016/S1006-1266(08)60282-5","url":null,"abstract":"","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"39 1","pages":"494-499"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89243192","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: 15
Effect of pre-tensioned Rock Bolts on Stress Redistribution Around a Roadway-Insight from Numerical Modeling 预张锚杆对巷道周边应力重分布的影响——基于数值模拟的洞察
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60285-0
F. Gao, Hong-pu Kang
{"title":"Effect of pre-tensioned Rock Bolts on Stress Redistribution Around a Roadway-Insight from Numerical Modeling","authors":"F. Gao, Hong-pu Kang","doi":"10.1016/S1006-1266(08)60285-0","DOIUrl":"https://doi.org/10.1016/S1006-1266(08)60285-0","url":null,"abstract":"","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"30 1","pages":"509-515"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72644966","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: 26
Mine-hoist fault-condition detection based on the wavelet packet transform and kernel PCA 基于小波包变换和核主成分分析的矿井提升机故障状态检测
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60295-3
Shi-xiong XIA, Qiang NIU, Yong ZHOU, Lei ZHANG
{"title":"Mine-hoist fault-condition detection based on the wavelet packet transform and kernel PCA","authors":"Shi-xiong XIA,&nbsp;Qiang NIU,&nbsp;Yong ZHOU,&nbsp;Lei ZHANG","doi":"10.1016/S1006-1266(08)60295-3","DOIUrl":"10.1016/S1006-1266(08)60295-3","url":null,"abstract":"<div><p>A new algorithm was developed to correctly identify fault conditions and accurately monitor fault development in a mine hoist. The new method is based on the Wavelet Packet Transform (WPT) and kernel PCA (Kernel Principal Component Analysis, KPCA). For non-linear monitoring systems the key to fault detection is the extracting of main features. The wavelet packet transform is a novel technique of signal processing that possesses excellent characteristics of time-frequency localization. It is suitable for analysing time-varying or transient signals. KPCA maps the original input features into a higher dimension feature space through a non-linear mapping. The principal components are then found in the higher dimension feature space. The KPCA transformation was applied to extracting the main nonlinear features from experimental fault feature data after wavelet packet transformation. The results show that the proposed method affords credible fault detection and identification.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 4","pages":"Pages 567-570"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60295-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77351222","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: 5
Laws of motion of particles in a jigging process 跳汰过程中粒子的运动规律
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60297-7
Ya-li KUANG , Jin-wu ZHUO , Li WANG , Chao YANG
{"title":"Laws of motion of particles in a jigging process","authors":"Ya-li KUANG ,&nbsp;Jin-wu ZHUO ,&nbsp;Li WANG ,&nbsp;Chao YANG","doi":"10.1016/S1006-1266(08)60297-7","DOIUrl":"10.1016/S1006-1266(08)60297-7","url":null,"abstract":"<div><p>The laws of motion of particle groups in a jigging process are studied. These describe the macroscopic phenomena that occur during jigging. During jigging the heavier and bigger particles concentrate at the bed bottom while lighter and smaller particles move to the upper part of the bed. Particles with equivalent properties tend to concentrate at a certain position centered around the inherent height of their distribution. The particle distribution variance gradually diminishes to some asymptotic value. The state equation group of the jigging bed is deduced and a calculation method, called the λ value judgment method, is proposed. The method is used to calculate the layer number and the inherent height of each particle group. A mathematical expression for the particle distribution variance is also given.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 4","pages":"Pages 575-579"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60297-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76429051","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: 6
Forecasting water disaster for a coal mine under the Xiaolangdi reservoir 小浪底水库下煤矿水害预测
Journal of China University of Mining and Technology Pub Date : 2008-12-01 DOI: 10.1016/S1006-1266(08)60286-2
Ya-jun SUN , Zhi-min XU , Qing-hong DONG , Sheng-dong LIU , Rong-bin GAO , Yu-hai JIANG
{"title":"Forecasting water disaster for a coal mine under the Xiaolangdi reservoir","authors":"Ya-jun SUN ,&nbsp;Zhi-min XU ,&nbsp;Qing-hong DONG ,&nbsp;Sheng-dong LIU ,&nbsp;Rong-bin GAO ,&nbsp;Yu-hai JIANG","doi":"10.1016/S1006-1266(08)60286-2","DOIUrl":"10.1016/S1006-1266(08)60286-2","url":null,"abstract":"<div><p>Xin'an coal mine, Henan Province, faces the risk of water inrush because 40% of the area of the coal mine is under the surface water of the Xiaolangdi reservoir. To forecast water disaster, an effective aquifuge and a limit of water infiltration were determined by rock-phase analysis and long term observations of surface water and groundwater. By field monitoring, as well as physical and numerical simulation experiments, we obtained data reflecting different heights of a water flow fractured zone (WFFZ) under different mining conditions, derived a formula to calculate this height and built a forecasting model with the aid of GIS. On the basis of these activities, the coal mine area was classified into three sub-areas with different potential of water inrush. In the end, our research results have been applied in and verified by industrial mining experiments at three working faces and we were able to present a successful example of coal mining under a large reservoir.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 4","pages":"Pages 516-520"},"PeriodicalIF":0.0,"publicationDate":"2008-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60286-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77631742","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: 24
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