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近水平复合煤层露天矿备采煤量留设位置与保有期优化 被引量:4
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作者 刘闯 白润才 +1 位作者 刘光伟 曹博 《重庆大学学报(自然科学版)》 EI CAS CSCD 北大核心 2017年第1期41-47,共7页
为了确定经济合理的露天矿备采煤量留设位置和保有期,运用露天开采基本原理与统计分析方法,分析新时期露天煤矿的发展变化特点及其对备采煤量留设位置和保有期的影响;以经济效益最优为判断准则,研究复合煤层露天矿备采煤量留设位置与内... 为了确定经济合理的露天矿备采煤量留设位置和保有期,运用露天开采基本原理与统计分析方法,分析新时期露天煤矿的发展变化特点及其对备采煤量留设位置和保有期的影响;以经济效益最优为判断准则,研究复合煤层露天矿备采煤量留设位置与内排运距的关系,建立备采煤量留设位置优化模型;研究季节性剥离露天矿备采煤量保有期与剥离成本、运输成本以及资金时间价值的关系,建立备采煤量保有期优化模型。以内蒙古东部地区某露天矿为研究实例,确定了该矿经济合理的备采煤量保有期为6.5个月,备采煤量应全部留在1号煤层。研究结果表明:该优化模型可用于指导露天矿生产,有效降低剥离成本,提高经济效益。 展开更多
关键词 露天矿 近水平复合煤层 采煤量保有期 采煤量留位置 季节性剥离
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谈煤矿采煤技术的发展与自动化技术应用 被引量:2
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作者 苏东然 《科技与企业》 2012年第24期189-189,共1页
文章结合采煤机在煤矿开采上的应用现状及综合机械化采煤技术概况,详细说明了利用电气自动化技术,可以发挥机电一体化作用,对建设高效高产矿井,实现现代化煤矿具有重要作用。
关键词 煤矿企业 自动化技术 设采煤备
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New development of longwall mining equipment based on automation and intelligent technology for thin seam coal 被引量:10
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作者 Guo-fa WANG 《Journal of Coal Science & Engineering(China)》 2013年第1期97-103,共7页
The paper introduced complete sets of automatic equipment and technology used in thin seam coal face, and proposed the comprehensive mechanization and automation of safe and high efficiency mining models based on the ... The paper introduced complete sets of automatic equipment and technology used in thin seam coal face, and proposed the comprehensive mechanization and automation of safe and high efficiency mining models based on the thin seam drum shearer. The key technology of short length and high power thin seam drum shearer, and new type roof support with big extension ratio and plate canopy were introduced. The new research achievement on automatic control system of complete sets of equipment for the thin seam coal, which composed of electronic-hydraulic system, compact thin seam roof supports, high effective shearer with intelligent control system, and characterized by automatical follow-up and remote control technology, was described in this paper.. 展开更多
关键词 longwall mining thin coal seam complete sets of equipment automatic system intelligent system
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Infrastructure-based localisation of automated coal mining equipment 被引量:31
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作者 Chad O. Hargrave Craig A. James Jonathon C. Ralston 《International Journal of Coal Science & Technology》 EI 2017年第3期252-261,共10页
A novel radar-based system for longwall coal mine machine localisation is described. The system, based on a radar-ranging sensor and designed to localise mining equipment with respect to the mine tunnel gate road infr... A novel radar-based system for longwall coal mine machine localisation is described. The system, based on a radar-ranging sensor and designed to localise mining equipment with respect to the mine tunnel gate road infrastructure, is developed and trialled in an underground coal mine. The challenges of reliable sensing in the mine environment are considered, and the use of a radar sensor for localisation is justified. The difficulties of achieving reliable positioning using only the radar sensor are examined. Several probabilistic data processing techniques are explored in order to estimate two key localisation parameters from a single radar signal, namely along-track position and across-track position, with respect to the gate road structures. For the case of across-track position, a conventional Kalman filter approach is sufficient to achieve a reliable estimate. However for along-track position estimation, specific infrastructure elements on the gate road rib-wall must be identified by a tracking algorithm. Due to complexities associated with this data processing problem, a novel visual analytics approach was explored in a 3D interactive display to facilitate identification of significant features for use in a classifier algorithm. Based on the classifier output, identified elements are used as location waypoints to provide a robust and accurate mining equipment localisation estimate. 展开更多
关键词 Localisation · Waypoint navigation · Machine learning · Radar ·Underground · Longwall mining· Automation
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Hazard identification for equipment-related fatal incidents in the U.S.underground coal mining 被引量:1
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作者 VladislavKecojevic ZainalabidinMdNor 《Journal of Coal Science & Engineering(China)》 2009年第1期1-6,共6页
Based on the number of fatalities per year, a persistent area of concern in mine safety continues to be equipment related. Data from the period 1995 through 2007 were studied in order to identify major hazards for und... Based on the number of fatalities per year, a persistent area of concern in mine safety continues to be equipment related. Data from the period 1995 through 2007 were studied in order to identify major hazards for underground mining equipment-related fatal incidents and to perform an analysis of those that occurred over the last 13 years. Reports on equipment-related fatal incidents were obtained from the Mine Safety and Health Administration (MSHA). The results show that underground mining equipment including continuous miner, shuttle car, roof bolter, load-haul-dump (LHD), Iongwall and hoisting contributed to a total of 69 mining-related fatalities. The study reveals that the major hazard for continuous mining equipment-related fatal incidents is "Failure of victim to respect equipment working area", while the highest number of fatalities for shuttle car is attributed to the hazard "Failure of mechanical components." The study further reveals that the highest number of fatalities for roof bolter, LHD, and Iongwall are attributed to the hazards "Working under unsupported roof", "Failure of management to provide safe working conditions", and "Failure of mechanical components", respectively. It is determined that one fatality for the hoisting system is attributed to the hazard "Failure of mechanical components" and one to the hazard "Failure to follow safe maintenance procedure". Finally, approaches to prevention were also discussed in this paper. 展开更多
关键词 coal mining safety EQUIPMENT fatal incidents HAZARD
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Equivalent-resistance based on the analysis of inductor-disconnected discharge behavior for intrinsic safety Buck converters 被引量:2
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作者 刘树林 刘健 +1 位作者 李艳 毛鸿 《Journal of Coal Science & Engineering(China)》 2008年第3期485-488,共4页
An Equivalent-Resistance based Analysis Method (ERAM) was proposed, which can convert the Inductor-Disconnected Discharge (IDD) behavior of the Intrinsically Safe Buck Converter (ISBC) into that of an Equivalent Simpl... An Equivalent-Resistance based Analysis Method (ERAM) was proposed, which can convert the Inductor-Disconnected Discharge (IDD) behavior of the Intrinsically Safe Buck Converter (ISBC) into that of an Equivalent Simple-Inductive-Circuit (ESIC). According to the inductor disconnected equivalent circuit corresponding to the most dan- gerous operating case of the converter,the arc discharge time and the variation of out- put-voltage during the IDD were deduced based on the simple current linear attenuation model.According to the energy equivalence,the equivalent inductor-current of the ESIC was obtained.It is pointed out that although the inductor-current of the Buck converter is much lower than that of the published ignition curve,ignition still occurs and the ignition ability is strengthened with increase of the output capacitance.The proposed analyzing method is verified by the experiment results on IEC standard spark ignition apparatus. 展开更多
关键词 Buck converter Intrinsically safe Buck converter energy equivalence inductor-current
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Key technologies and equipment for a fully mechanized top-coal caving operation with a large mining height at ultra-thick coal seams 被引量:61
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作者 Jinhua Wang Bin Yu +4 位作者 Hongpu Kang Guofa Wang Debing Mao Yuntao Liang Pengfei Jiang 《International Journal of Coal Science & Technology》 EI 2015年第2期97-162,共66页
Thick and ultra-thick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines, which accounts for 44 % of the total minable coal reserve. A fully mechanized top-coal caving mi... Thick and ultra-thick coal seams are main coal seams for high production rate and high efficiency in Chinese coal mines, which accounts for 44 % of the total minable coal reserve. A fully mechanized top-coal caving mining method is a main underground coal extraction method for ultra-thick coal seams. The coal extraction technologies for coal seams less than 14 m thick were extensively used in China. However, for coal seams with thickness greater than 14 m, there have been no reported cases in the world for underground mechanical extraction with safe performance, high efficiency and high coal recovery ratio. To deal with this case, China Coal Technology & Engineering Group, Datong Coal Mine Group, and other 15 organizations in China launched a fundamental and big project to develop coal mining technologies and equipment for coal seams with thicknesses greater than 14 m. After the completion of the project, a coal extraction method was developed for top-coal caving with a large mining height, as well as a ground control theory for ultra-thick coal seams. In addition, the mining technology for top-coal caving with a large mining height, the ground support technology for roadway in coal seams with a large cross-section, and the prevention and control technology for gas and fire hazards were developed and applied. Furthermore, a hydraulic support with a mining height of 5.2 m, a shearer with high reliability, and auxiliary equipment were developed and manufactured. Practical implication on the technologies and equipment developed was successfully completed at the No. 8105 coal face in the Tashan coal mine, Datong, China. The major achievements of the project are summarized as follows: 1. A top-coal caving method for ultra-thick coal seams is proposed with a cutting height of 5 m and a top-coal caving height of 15 m. A structural mechanical model of overlying strata called cantilever beam-articulated rock beam is established. Based on the model, the load resistance of the hydraulic support with a large mining height for top-coal caving method is determined. With the analysis, the movement characteristics of the top coal and above strata are evaluated during top-coal caving operation at the coal face with a large mining height. Furthermore, there is successful development of comprehensive technologies for preventing and controlling spalling of the coal wall, and the top-coal caving technology with high efficiency and high recovery at the top-coal caving face with a large mining height. This means that the technologies developed have overcome the difficulties in strata control, top-coal caving with high efficiency and high coal recovery, and enabled to achieve a production rate of more than 10 Mtpa at a single top-coal caving face with a large mining height in ultra-thick coal seams; 2. A hydraulic support with 5.2 m supporting height and anti-rockburst capacity, a shearer with high reliability, a scraper conveyor with a large power at the back of face, and a large load and long distance headgate belt conveyor have been successfully developed for a top-coal caving face with large mining height. The study has developed the key technologies for improving the reliability of equipment at the coal face and has overcome the challenges in equipping the top-coal caving face with a large mining height in ultra-thick coal seams; 3. The deformation characteristics of a large cross-section roadway in ultra-thick coal seams are discovered. Based on the findings above, a series of bolt materials with a high yielding strength of 500-830 MPa and a high extension ratio, and cable bolt material with a 1 × 19 structure, large tonnage and high extension ratio are developed. In addition, in order to achieve a safe roadway and a fast face advance, installation equipment for high pre-tension bolt is developed to solve the problems with the support of roadway in coal seams for top-coal caving operation with a large mining height; 4. The characteristics of gas distribution and uneven emission at top-coal caving face with large mining height in ultra-thick coal seams are evaluated. With the application of the technologies of gas drainage in the roof, the difficulties in gas control for high intensive top-coal caving mining operations, known as "low gas content, high gas emission", are solved. In addition, large flow-rate underground mobile equipment for making nitrogen are developed to solve the problems with fire prevention and safe mining at a top-coal caving face with large mining height and production rate of more than 10 Mtpa. A case study to apply the developed technologies has been conducted at the No. 8105 face, the Tashan coal mine in Datong, China. The case study demonstrates that the three units of equipment, i.e., the support, shearer and scraper conveyor, are rationally equipped. Average equipment usage at the coal face is 92.1%. The coal recovery ratio at the coal face is up to 88.9 %. In 2011, the coal production at the No. 8105 face reached 10.849 Mtpa, exceeding the target of 10 Mtpa for a topcoal caving operation with large mining height performed by Chinese-made mining equipment. The technologies and equipment developed provide a way for extracting ultra-thick coal seams. Currently, the technologies and equipment are used in 13 mining areas in China including Datong, Pingshuo, Shendong and Xinjiang. With the exploitation of coal resources in Western China, there is great potential for the application of the technologies and equipment developed. 展开更多
关键词 Ultra-thick coal seams Top-coal caving mining Large mining height Mining method - Mining equipment Roadway support Safety guarantee
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The adjusting mining technology of combining fully mechanized with individual prop,rotating,hilt,irregular form,and double unit face on thin coal seam of Tianchen Mine 被引量:1
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作者 宋华岭 温国锋 李金克 《Journal of Coal Science & Engineering(China)》 2008年第1期44-48,共5页
Analyzed the situations and characteristics of thin coal seam mining and its mining technologies,and introduced the mining innovation technology used by Tianchen Coal Mine of Zhaozhuang Coal Company of China.This inno... Analyzed the situations and characteristics of thin coal seam mining and its mining technologies,and introduced the mining innovation technology used by Tianchen Coal Mine of Zhaozhuang Coal Company of China.This innovation technology combined the fully mechanized mining with individual props,and the working face of mining is over length,irregular form and double units.The rotational adjusting mining technology on thin coal seam is also practiced in this new mining technology.The detail technologies,such as outlays of working face and ways,mining methods,equipments of cutting,transporting and sporting,have been introduced.So that,using the synthetic and creative mining tech- nologies,Tianchen Coal Mine solves the mining problems of thin coal seam successfully. 展开更多
关键词 mining of thin coal seam double unit face rotational and adjusting mining
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Sensing for advancing mining automation capability:A review of underground automation technology development 被引量:39
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作者 Ralston Jonathon Reid David +1 位作者 Hargrave Chad Hainsworth David 《International Journal of Mining Science and Technology》 SCIE EI 2014年第3期305-310,共6页
This paper highlights the role of automation technologies for improving the safety, productivity, and environmental sustainability of underground coal mining processes. This is accomplished by reviewing the impact tha... This paper highlights the role of automation technologies for improving the safety, productivity, and environmental sustainability of underground coal mining processes. This is accomplished by reviewing the impact that the introduction of automation technology has made through the longwall shearer automation research program of Longwall Automation Steering Committee(LASC). This result has been achieved through close integration of sensing, processing, and control technologies into the longwall mining process. Key to the success of the automation solution has been the development of new sensing methods to accurately measure the location of longwall equipment and the spatial configuration of coal seam geology. The relevance of system interoperability and open communications standards for facilitating effective automation is also discussed. Importantly, the insights gained through the longwall automation development process are now leading to new technology transfer activity to benefit other underground mining processes. 展开更多
关键词 Mining automation Longwal mining Longwal Automation Steering Committee Interoperability Inertial navigation Coal seam sensing
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New development of sets equipment technologies for coal mine longwall face in China 被引量:9
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《Journal of Coal Science & Engineering(China)》 2012年第1期1-9,共9页
Background of the development and achievement on sets equipment technologies for coal mine longwall face in China was reviewed initially. On the theoretical side, a coupling model of hydraulic support and surrounding ... Background of the development and achievement on sets equipment technologies for coal mine longwall face in China was reviewed initially. On the theoretical side, a coupling model of hydraulic support and surrounding rock, support pa- rameters optimization and threedimensional (3D) dynamic design method were presented. On the practical side, this paper out lined some of practical issues and discussed some relative methods and technologies. In thin seam coal longwall mining, how to lower equipment height is the first problem that should be solved. Roof pressure regularity, control of rooffall and collapse, and hydraulic support stability were investigated preferentially in 5-7 m coal seam longwall mining. The application of equip- ment for longwall mining with 5-7 m cutting height in China was concluded. The characteristics of full-mechanized top coal caving for extra thick seam coal were presented. The automation of top-caving hydraulic support and relevant equipment have achieved important breakthrough. At the end of this paper, further development of China's coal industry and longwall mining technologies and equipment were prospected in brief. This paper gives readers a comprehensive understanding of China's coal mine longwall face equipment technologies. It will give help to other countries on its coal mining development. 展开更多
关键词 sets equipment longwall mining coupling of hydraulic support and rock working face automation
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