检索结果-南通市图书馆

Three-dimensional stability calculation method for high and large co.posite slopes formed by mining stope and inner dump in adjacent open pits

引用

International Journal of Mining Science and Technology 2024年第4期34卷 507-520页

作者： Zuchao Liang Dong Wang Guanghe Li Guangyu Sun Mingyu Yu Dong Xia Chunjian Ding co.lege of Mining Engineering Liaoning Technical UniversityFuxin 123000China Inner Mongolia Pingxi Baiyinhua co.l Industry co. Ltd.Xilingol League 026000China guoneng baorixile energy co. Ltd.Hulunbuir 021008China

The 2D limit equilibrium method is widely used for slope stability ***,with the advancement of dump engineering,co.posite slopes often exhibit significant 3D mechanical ***,it is of significant importance to develop an effective 3D stability calculation method for co.posite slopes to enhance the design and stability co.trol of open-pit slope *** the co.posite slope formed by the mining stope and inner dump in Baiyinhua No.1 and No.2 open-pit co.l mine as a case study,this research investigates the failure mode of co.posite slopes and establishes spatial shape equations for the sliding *** integrating the shear resistance and sliding force of each row of microstrip co.umns onto the bottom surface of the strip co.responding to the main sliding surface,a novel 2D equivalent physical and mechanical parameters analysis method for the strips on the main sliding surface of 3D sliding masses is ***,a co.prehensive 3D stability calculation method for co.posite slopes is developed,and the quantitative relationship between the co.rdinated development distance and its 3D stability co.fficients is *** analysis reveals that the failure mode of the co.posite slope is characterized by cutting-bedding sliding,with the arc serving as the side interface and the weak layer as the bottom interface,while the destabilization mechanism primarily involves shear *** spatial form equation of the sliding mass co.prises an ellipsoid and weak plane *** analysis revealed that when the co.rdinated development distance is 1500 m,the error rate between the 3D stability calculation result and the 2D stability calculation result of the co.posite slope is less than 8%,thereby verifying the proposed analytical method of equivalent physical and mechanical parameters and the 3D stability calculation method for co.posite ***,the3D stability co.fficient of the co.posite slope exhibits an exponential co

关键词： co.posite slope Destabilization mechanism 3D mechanical effect Three-dimensional stability co.rdinated development distance

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Potential evaluation of saline aquifers for the geological storage of carbon dioxide: A case study of saline aquifers in the Qian-5 member in northeastern Ordos Basin

引用

China Geology 2024年第1期7卷 12-25页

作者： Yan Li Peng Li Hong-jun Qu Gui-wen Wang Xiao-han Sun Chang Ma Tian-xing Yao guoneng Jinjie energy co. Ltd.Shenmu 719319China Department of Geology Northwest UniversityXi’an 710069China Carbon Neutrality co.lege(Yulin) Northwest UniversityXi’an 710069China National&Local Joint Engineering Research Center of Carbon Capture and Storage Technology Xi’an 710069China

The well-developed co.l electricity generation and co.l chemical industries have led to huge carbon dioxide(co.(2))emissions in the northeastern Ordos *** geological storage of co.(2) in saline aquifers is an effective backup way to achieve carbon *** this case,the potential of saline aquifers for co.(2) storage serves as a critical basis for subsequent geological storage *** study calculated the technical co.trol capacities of co.(2) of the saline aquifers in the fifth member of the Shiqianfeng Formation(the Qian-5 member)based on the statistical analysis of the logging and the drilling and co.e data from more than 200 wells in the northeastern Ordos Basin,as well as the sedimentary facies,formation lithology,and saline aquifer development patterns of the Qian-5 *** results show that(1)the reservoirs of saline aquifers in the Qian-5 member,which co.prise distributary channel sand bodies of deltaic plains,feature low porosities and permeabilities;(2)The study area hosts three NNE-directed saline aquifer zones,where saline aquifers generally have a single-layer thickness of 3‒8 m and a cumulative thickness of 8‒24 m;(3)The saline aquifers of the Qian-5 member have a total technical co.trol capacity of co.(2) of 119.25×10^(6) *** the largest scale and the highest technical co.trol capacity(acco.nting for 61%of the total technical co.trol capacity),the Jinjie-Yulin saline aquifer zone is an important prospect area for the geological storage of co.(2) in the saline aquifers of the Qian-5 member in the study area.

关键词： Carbon burial Carbon neutral co.(2) storage in saline aquifer Distributary channel sand body Potential evaluation Technical co.trol capacity co.(2)geological storage engineering Ordos Basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Experimental study on NO_(x)emission characteristics under oxy-fuel co.bustion

引用

Clean energy 2023年第3期7卷 595-601页

作者： Haibo Wu Zhiyong An Kai Zhang Yu Mao Zhimin Zheng Zhaohui Liu Tianjin guoneng Panshan Power Generation co. LtdTianjin301907China China energy Investment co.poration Beijing100011China Dongfang Boiler(Group)co. Ltd.Zigong643001China Anhui University of Technology MaanshanAnhui243099China Huazhong University of Science and Technology WuhanHubei430074China

This study focuses on the emission characteristics of NO_(x)under oxy-fuel co.bustion co.ditions.A co.parative analysis with air co.bustion was ***_(x)emission,co.trol measures and influence factors under different working co.ditions were *** were carried out on a 3-MWth test platform and a laboratory ***‘π’-type furnace was adopted,with the fur-nace width of 2.6 m,depth of 2.0 m and height of 10.5 m for the 3-MWth co.l-fired ***_(x)emissions at different oxygen co.cen-trations and different air distribution were investigated;the effects of H2O and co.(2)co.centration on denitrification efficiency and SO_(2)/SO_(3)co.version rate were *** results suggest that,co.pared with air co.bustion,NO co.centration(volume basis)at the furnace outlet under oxy-fuel co.bustion is higher than that of air co.bustion,but the amount of NO_(x)emissions in the discharged gas significantly decrease co.pared to the air co.bustion *** addition,the formation of NO_(x)can be effectively co.trolled through staged ***,the selective catalytic reduction(SCR)denitrification efficiency and the co.-version rate of SO_(2)to SO_(3)decreases when the co.(2)co.centration and the H2O co.tent increase,indicating that co.(2)and H2O have an adverse effect on the performance of the ***,co.pared with co.(2)co.centration,H2O co.tent has a greater effect on catalyst performance.

关键词： experimental research NO_(x) oxy-fuel co.bustion SO_(2)/SO_(3)

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Post-co.bustion slipstream co.(2)-capture test facility at Jiangyou Power Plant, Sichuan, China: performance of a membrane separation module under dynamic power-plant operations

引用

Clean energy 2021年第4期5卷 742-755页

作者： Qian Cui Baodeng Wang Xinglei Zhao Guoping Zhang Zhendong He Yinhua Long Yongwei Sun Anthony Y.Ku National Institute of Clean-and-Low-Carbon energy Beijing 102209P.R.China guoneng Jiangyou Thermal Power co. LtdSichuanP.R.China NICE America Research Mountain ViewCA 94043USA

Membrane-based separation technologies have the potential to lower the co.t of post-co.bustion co.(2) capture from power-plant flue gases through reduced energy and capital co.ts relative to co.ventional solvent *** have shown promise under co.trolled co.ditions,but there is a need for data on performance and reliability under field ***-fired power plants in China operate in a dynamic manner,with increases and decreases in output causing changes in flue-gas *** this paper,we describe the first field test of a membrane-based post-co.bustion co.(2)-capture system co.nected to a dynamically operating power plant in *** report the performance of a Membrane Technology Research,Inc.(MTR)Polaris^(TM) membrane-based capture system over a range of plant operating loads ranging from 54%to 84%and co.ducted an operational stability test over a 168-h period during which the power plant was operating at an average load of 55%,but ramped as high as 79%and as low as 55%.Our results co.firm the ability of a membrane capture system to operate effectively over a wide range of host-plant operating co.ditions,but also identity several issues related to plant integration,system co.trol and resilience in the face of host-plant upsets that require attention as membrane separation systems move towards co.mercial use.

关键词： China co.(2)capture membrane co.l power post-co.bustion capture

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

A calibration-free model for laser-induced breakdown spectrosco.y using non-gated detectors

引用

Frontiers of physics 2022年第6期17卷 175-183页

作者： Zongyu Hou Weilun Gu Tianqi Li Zhe Wang Liang Li Xiang Yu Yecai Zhang Zijun Liu State Key Lab of Power System Department of Energy and Power EngineeringInternational Joint Laboratory on Low Carbon Clean Energy InnovationTsinghua UniversityBeijing 100084China Shanxi Research Institute for Clean energy Tsinghua UniversityTaiyuan 030032China Beijing Research Institute of Chemical Engineering and Metallurgy Beijing 101149China China National Uranium co.poration Beijing 100013China guoneng Shenwan energy co. LtdChina Jinneng Holding Tashan Power Generation co. LtdChina

Calibration-free(CF)laser-induced breakdown spectrosco.y(LIBS)is normally only applicable for gated detectors due to its dependence on the assumption of a steady-state ***,most currently available LIBS systems are equipped with non-gated detectors such as chargeco.pled device(CCD),which degrades the accuracy of CF *** this paper,the reason for the less satisfactory quantification performance of CF for LIBS with non-gated detectors was clarified and a time-integration calibration-free(TICF)model was proposed for applications with non-gated *** was based on an assumed temporal profile of plasma properties,including temperature and electron density,obtained from another *** line intensity at different time during the signal co.lection time window was estimated with self-absorption co.rection acco.ding to the temporal profile of the plasma *** proposed model was validated on titanium alloys and co.pared with traditional *** accuracy of elemental co.centration measurement was improved significantly:the average relative error of aluminum and vanadium decreased from 6.07%and 22.34%to 2.01%and 1.92%,*** quantification results showed that TICF method was able to extend the applicability of CF to LIBS with non-gated detectors.

关键词： laser-induced breakdown spectrosco.y calibration-free nongated detector self-absorption co.rection

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Research and application of thermal insulation effect of natural gas hydrate freezing co.er based on the wireline-co.ing principle

引用

Petroleum Science 2022年第3期19卷 1291-1304页

作者： Yun-Qi Hu Jing Xie Shou-Ning Xue Meng Xu Cheng-Hang Fu Hui-Lan He Zhi-Qiang Liu Shao-Ming Ma Si-Qing Sun Chuan-Liu Wang School of Mechanical Engineering Sichuan UniversityChengdu610065China MOE Key Laboratory of Deep Underground Science and Engineering Sichuan UniversityCollege of Water Resource and HydropowerSichuan UniversityChengdu610065China Zhensha Hydropower co.struction Management Branch of guoneng Dadu River Basin Hydropower Development co.Ltd Leshan614700SichuanChina Jin Shi Drill Tech co. LtdTangshan063004HebeiChina Xi'an Research Institute China Coal Technology&Engineering Group CorpXi'an710077ShaanxiChina

Natural gas hydrate(NGH)holds great promise as a source of clean *** is critical for acquiring the largest possible in situ NGH co.e for NGH eigen features and resource ***,the existing NGH co.ing technology has limitations,such as temperature increments,limited co.ing diameters,low co.ing rates,and co.plex co.ing ***,this study designs and proposes an NGH freezing co.ing(NGHFC)method and verifies the freezing and co.ing capacities of the NGHFC method in laboratories and experimental *** suggest that NGHFC shows good freezing and heat-retention properties.A freezing co.e heat transfer model is *** to the actual air temperature and operating time,the optimum initial temperature of the co.d source can be determined using this *** average co.ing rate of NGHFC can reach 77.86%.The research results will provide a new idea of co.ing gas hydrates.

关键词： Natural gas hydrate co.ing co.d source freezing In situ temperature and pressure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A data selection method for matrix effects and uncertainty reduction for laser-induced breakdown spectrosco.y

引用

Plasma Science and Technology 2023年第7期25卷 82-89页

作者：龙杰宋惟然侯宗余王哲 State Key Laboratory of Power System Operation and co.trol Systems International Joint Laboratory on Low Carbon Clean Energy InnovationDepartment of Energy and Power EngineeringTsinghua UniversityBeijing 100084People’s Republic of China Shanxi Research Institute for Clean energy Tsinghua UniversityTaiyuan 030032People’s Republic of China

Severe matrix effects and high signal uncertainty are two key bottlenecks for the quantitative performance and wide applications of laser-induced breakdown spectrosco.y(LIBS).Based on the understanding that the superposition of both matrix effects and signal uncertainty directly affects plasma parameters and further influences spectral intensity and LIBS quantification performance,a data selection method based on plasma temperature matching(DSPTM)was proposed to reduce both matrix effects and signal *** selecting spectra with smaller plasma temperature differences for all samples,the proposed method was able to build up the quantification model to rely more on spectra with smaller matrix effects and signal uncertainty,therefore improving final quantification *** applied to quantitative analysis of the zinc co.tent in brass alloys,it was found that both accuracy and precision were improved using either a univariate model or multiple linear regression(MLR).More specifically,for the univariate model,the root-mean-square error of prediction(RMSEP),the determination co.fficients(R^(2))and relative standard derivation(RSD)were improved from 3.30%,0.864 and 18.8%to 1.06%,0.986 and 13.5%,respectively;while for MLR,RMSEP,R^(2)and RSD were improved from 3.22%,0.871 and 26.2%to 1.07%,0.986 and 17.4%,*** results prove that DSPTM can be used as an effective method to reduce matrix effects and improve repeatability by selecting reliable data.

关键词： laser-induced breakdown spectrosco.y(LIBS) quantification uncertainty univariate/multivariate analysis matrix effects temperature matching

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

煤矿充填固碳理论基础与技术构想

引用

煤炭科学技术 2024年第2期52卷 292-308页

作者：刘浪方治余王双明高过斌张波赵玉娇朱梦博刘志超王晶钰周静李艳王美张小艳 ZHOU Song 贾奇锋西安科技大学能源学院陕西西安710054 西安科技大学煤炭绿色开采地质研究院陕西西安710054 西安科技大学地质与环境学院陕西西安710054 国能锦界能源有限责任公司陕西榆林719300 武汉理工大学材料科学与工程学院湖北武汉430070 西安财经大学商学院陕西西安710100 CSIRO energy 10 Murray Dwyer CctMayfield West NSW 2304

在国家“双碳”目标背景下,如何减少煤炭行业的碳排放、实现碳封存已成为亟待解决的难题。煤炭行业作为高碳化石能源生产者和主体碳排放源提供者,在生产和消费过程中引发的大宗固废堆存、大型采空区形成和大量co.(2)排放是制约煤炭可持... 详细信息

在国家“双碳”目标背景下,如何减少煤炭行业的碳排放、实现碳封存已成为亟待解决的难题。煤炭行业作为高碳化石能源生产者和主体碳排放源提供者,在生产和消费过程中引发的大宗固废堆存、大型采空区形成和大量co.(2)排放是制约煤炭可持续开发利用与绿色健康发展的瓶颈所在。为协同解决二氧化碳封存与矿山固废消纳问题,将大宗固废处置、固废高值化利用、co.(2)封存、采空区利用有机结合,提出了二氧化碳充填的理念,从碳汇能力评估角度界定了二氧化碳充填的3种类型。具体开展工作包括:①分析了co.(2)充填料浆输运过程和矿化反应过程涉及到的基础理论,给出了各个过程的数学方程以及碳封存量计算公式,指出了温度、湿度等因素对矿化反应机理、碳封存量和充填体强度的影响规律。②总结了现阶段co.(2)矿化的工艺方法、主要碱性工业固废的co.(2)封存能力和co.(2)矿化强化措施。在此基础上提出了基于直接湿法矿化和间接矿化的2种co.(2)充填材料制备工艺,满足矿井充填的流动性、凝固特性和强度要求。③针对co.(2)充填过程中的co.(2)物理封存问题,提出了窄条带式胶结充填和综采架后胶结充填2种技术路径,前者通过在弱充填条带中构筑多贯通孔隙的充填体co.(2)物理封存,后者借助充填支架和链式自行充填挡板在长壁工作面采空区中间断构筑充填带,控制顶板垮落,形成co.(2)物理化学封存空间。④为了评估co.(2)充填的碳平衡效果,依据全生命周期法界定了co.(2)充填中碳足迹及碳消纳的计算边界。然后,梳理了co.(2)充填过程中的碳足迹及碳消纳,分别考虑了co.(2)的来源、用量、损耗、转化等因素。给出了包括原料运输、充填料浆制备、井下注入与充填等过程中的碳足迹及碳消纳计算方法。研究成果有望降低co.(2)封存的能耗及成本,对煤炭绿色开采及其可持续开发利用具有深远的意义。

关键词： co.(2)封存间断充填充填固碳碳足迹碳消纳

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：