New Progress on the Coal Fines Affecting the Development of Coalbed Methane

Objective The production of coal fines is very common in the development of coalbed methane（CBM）in the eastern margin of the Ordos Basin,China.A large amount of produced coal fines seriously affect the productivity of CBM wells（Wei Yingchun et al.,2013）.Therefore,the production problems of CBM wells caused by coal fines have attracted extensive attention.

An analysis of new generation coal gasification projects

The global trends of increasing oil and gas costs have compelled coal possessing countries to start long term underground coal gasification （UCG） projects. These enhance national energy security and are among the cleanest, ecologically safest coal utilization technologies. This paper delineates the major characteristics of such technologies and analyzes technical solutions. Highlighting the desire to develop large scale industrial UCG plants, pilot level projects are presented using a new UCG method developed in Russia by Joint Stock Company Gazprom Promgaz. This method is distinct for its high controllability, stability, and energy efficiency. New, efficient technical solutions have been developed over the last 10-15 years and are patented in Russia. They guarantee controllability and stability of UCG gas produc- tion. Over one hundred iniection and gas production wells have been operated simultaneously.

New Breakthroughs in China's Coal Gasification Technology

It is learned from the 2013 Summit Forum on Strategic Development of Coal-to-Natural Gas in China that the China Sedin Engineering Company,Ltd.has developed with independent intellectual property rights two experimental furnaces for pressurized gasification of crushed coal,5 m

New world record of coal consumption hit in China

Through more than two months of trial operation,a heat recovery system, called broad-sense heatrecovery system, was put into operation in Shanghai Waigaoqiao Third Power Generation Corporation

Application of A New Anchor Cable Mounting Rod in the Lower Soft Coal Seam of Splitting and Merging Coal

To obtain the deep displacement of the coal seam in the working face,multi-point displacements were installed in the coal seam, but the installation of multi-point displacement is differen tunder different geological conditions. This paper is based on the splitting and merging of 7_1 coal and 7_2 coal in Huaibei Mining(Group) Co., Ltd., and analyzes properties of the roof andcoal in the 7_2 coal of the lower coal seam of bifurcation area, and calculates the damage depth of the floor in the process of 7_1 coal mining. The multi-point displacement meter installation is often challenged by hole collapse, stuck pole and broken installation rod in 7_2 coal of the soft coal seam of bifurcation area, as a result, the base points can't be installed in the specified location. In view of this, this paper adopts a new anchor cable mounting rod which can install the whole base points to the specified location without stuck pole or broken mounting stem. All the basic displacement data can be obtained, and the law of mine pressure appearance in stope and tunnel can be accurately controlled, which can be used to maintain the stability of roadway and the safety of stope.

大规模CCUS在新型燃煤发电机组中的应用

本文对燃煤电厂度电碳排放强度进行测算,提出新型燃煤发电机组二氧化碳捕集装置规模的建议,介绍醇胺吸收法在大规模二氧化碳捕集和封存利用(CCUS/CCS)中的应用及主要技术经济指标,针对实现燃煤电厂碳排放强度低于600 g CO_(2)/kWh要求的CCUS/CCS技术路线,详细分析了对原有系统的影响并提出了蒸汽和冷却水等系统优化方案,估算降低碳排放强度600 gCO_(2)/kWh条件下的CCUS/CCS运行费用及其对机组度电成本的影响。

新型煤矿机械在煤炭开采中的应用

文章探讨了新型煤矿机械在煤炭开采中的应用,通过文献综述、案例分析等研究方法,分析了高效采煤机、运输设备、支护设备及通风除尘设备等新型机械的应用情况。研究结果表明,应用新型煤矿机械显著提升了开采效率、煤炭产量与质量,同时获得了技术投资的高回报率。因此,新型煤矿机械是推动煤炭工业技术进步与可持续发展的重要力量,未来应加强技术研发与创新,进一步提升机械设备的安全性与环保性。

陶粒轻型高钛渣混凝土叠合板的研究进展

陶粒轻型高钛渣混凝土叠合板是一种利用工业固体废弃物、陶粒轻型骨料作混凝土原材料,内含钢筋桁架的新型装配式叠合板,因其性能优异、低碳环保而被逐渐应用于实际工程建设。系统梳理了陶粒轻型高钛渣混凝土叠合板在实际应用方面的进展,阐述该新型叠合板的原料来源、物理性能、力学性能、施工工艺、在混凝土中的利用方式以及配比设计等,对现阶段研究中存在的不足提出了相应的建议。

Basic theory research of coal spontaneous combustion

Discussed latest research results of basic theory research of coal spontaneous combustion in detail,with quantum chemical theory and method and experiment syste- matically studied chemical structure of coal molecule,adsorption mechanism of coal sur- face to oxygen molecule and chemical reaction mechanism and process of spontaneous combustion of organic macromolecule and low molecular weight compound in coal from microcosmic view,and established complete theoretical system of the mechanism of coal spontaneous combustion.

煤炭工业数字智能绿色三化协同模式与新质生产力建设路径

煤炭工业是支撑我国经济社会高速发展和保障国家能源安全的压舱石与稳定器,承担着能源保供与支撑新能源稳定发展的时代使命,煤炭工业的高质量发展既是落实我国能源安全新战略与产业体系变革的关键,也是推进能源产业可持续发展与促进国家高质量发展的基础。当前我国煤炭工业高质量发展已取得阶段成效,能源保供成绩显著,产业结构不断优化,科技创新能力显著提高,绿色开发与清洁高效利用持续推进。但当前煤炭工业仍面临诸多挑战,发展水平与中国式现代化的国家需求差距较大,可持续发展受多重因素制约,数字技术与煤炭开发利用尚未深度融合,智能化建设仍处于示范培育阶段,绿色化发展不平衡且矛盾突出,煤炭工业的转型升级仍然任重道远。结合当前煤炭工业发展现状与挑战,提出了数字化、智能化、绿色化(三化)协同的发展模式,明确了煤炭新质生产力的核心内涵,构建了三化协同发展煤炭新质生产力的总体架构,阐述了通过数字化变革生产要素创新配置、智能化引领关键技术跨越突破、绿色化主导传统产业深度转型三大要素催生煤炭新质生产力的技术路径,提出了六大技术体系:通过研发全产业链数据高效采集与深度治理技术体系,打通煤炭产—运—储—销—用全流程的数据壁垒;通过研发构建煤炭行业知识图谱与智能决策管控技术体系,深度挖掘煤炭产业上下游各业务场景的关联关系与价值,为煤炭生产利用全流程的自主决策与智能控制奠定基础;开展煤炭资源智能-绿色-高效开发技术体系、煤炭产业安全协同保障技术体系、矿区生态智能监测-预警-修复技术体系、煤炭柔性开发与清洁低碳利用技术体系研究,实现煤炭开发利用全产业链、全流程的三化协同发展,培育形成煤炭新质生产力,为煤炭工业的整体形象带来根本性变革提升。

Production of synthetic hydrocarbons from coal through its underground gasification

The problem of the high-level processing of coal into synthetic motor fuels assumes worldwide actual meaning nowadays. Thereat, it is important especially for countries and regions which possess extensive coal resources and are forced to be guided by the import of liquid and gas hydrocarbons. However, a greater emphasis is paid to the given issue in Russia-The development of the federal program for highlevel processing of coal into synthetic motor fuels was initiated. This article describes options of underground coal gasification (UCG) use for the generation of hydrocarbons from UCG gas in the process of the Fischer-Tropsch synthesis (FTS). The technical and economic analysis of the integrated UCG-FTS powerchemical factories has detected their investment attractiveness and practicability of experimental-industrial testing at coal deposits of the Russian Federation.

Current Status of the Research on Coal Geology in China

Coal is the main energy in China, which has already played and will continue to play an important role in the national economy. Coal geology, as a practical science, has an access to gradual development with the growth and prosperity of China. From the meaning of the coalfield geology, this paper introduces the research progress and status of coalfield geology, including the research on coal basin, stratigraphy of coal-bearing stratigraphic sequences, coal-forming process, structural geology of coalfields, and exploration and development status of coal resources. The paper specially focuses on coal-forming process, including coal formation in terrestrial facies and transgressive / regression events, and introduces new technology which has been applied to research progress in structural geology of coalfield. This paper puts forward a new comprehensive exploration system for coal exploration and reviews regional coal geological exploration results in recent years, such as coal-poor regions of seven provinces in southern China and the coal resources area in northwest China, which will be an important coal-producing area in the future .

新型能源体系发展背景下煤炭清洁高效转化的挑战及途径

当今世界地缘政治风险加剧、气候环境问题凸显,能源转型变革加快。在此背景下,构建更加适应形势变化的能源体系对提高我国能源供应系统的可持续性及安全稳定性意义重大。目前我国化石能源仍占据主体地位。油气资源存在能源安全问题及新能源技术水平有待提升,中国短期内对煤炭能源仍将保持较高依赖性。因此,推进煤炭清洁高效转化对于新型能源体系的构建具有重要意义。首先对新型能源体系的具体内涵与构建方向展开讨论,并在此基础上,对新时代中国煤化工产业的发展现状以及面临的机遇与挑战进行了阐述,以期为煤炭的清洁高效转化技术的进步及煤化工产业的未来发展提供建议。新时代要求赋予新型能源体系更多的内涵。因此从战略上看,未来能源体系应具备“安全高效、清洁低碳、多元协同、智能普惠”多个特征,这也对煤炭产业的清洁高效发展提出了更高的要求。我国的煤炭清洁高效转化已取得显著进步,但多个关键技术仍亟待突破。结合煤炭产业转型发展与“双碳”目标关系的系统性认识,在新型能源体系建设的需求下,推进煤炭清洁高效转化对于社会经济发展、助力“双碳”目标实现具有重要意义,其关键在于加强该领域相关学科专业的基础研究和煤炭清洁高效转化技术的创新开发。

碳中和目标下中国天然气工业进展、挑战及对策

天然气在21世纪中叶将迈入“鼎盛期”,“天然气时代”正在到来。回顾全球天然气工业历程,梳理美国页岩革命启示,总结中国天然气发展历史与成果进展,分析天然气在能源绿色低碳转型中的地位与挑战,提出当前和未来中国天然气工业的发展对策。中国天然气工业经历了起步、增长、跨越3个发展阶段,已成为世界第4大天然气生产国与第3大消费国;天然气勘探开发理论技术取得重大成就,为储量产量规模增长提供了重要支撑。碳中和目标下,推动绿色可持续发展,天然气工业发展挑战与机遇并存。天然气低碳优势显著,“气电调峰”助力新能源发展;同时,开采难度与成本加大等问题更突出。为保障国家能源安全,实现经济社会与生态环境和谐共生,碳中和进程中,立足“统筹布局、科技创新;多能互补、多元融合;灵活高效、优化升级”,完善产供储销体系建设,加速推动天然气工业发展:①加大天然气勘探开发力度,规划部署重点勘探开发领域,突破关键理论,强化技术攻关,持续支撑增储上产;②推进天然气绿色创新发展,突破新技术,拓展新领域,融合新能源;③优化天然气供需转型升级,加大管道气、液化天然气布局和地下储气库建设,建立储备体系,提升应急调节能力和天然气一次能源消费比例,助力能源消费结构转型,实现资源利用低碳化、能源消费清洁化。

Micro shape of coal particle and crushing energy

A large amount of energy is consumed in a coal and gas outburst since a mass of coal is pulverized and ejected, accompanying a great quantity of gas emitted, resulting in a major mining hazard in underground coal mining around the world. Understanding how potential energy stored in gassy coal seams dissipates in the process of outbursting may possibly be a key to clarify the mechanisms responsible for coal and gas outburst. The present study was aimed to evaluate energy for crushing coal to various size fractions in coal and gas outbursts through theoretical and experimental investigation into the shape of fine coal particles and their equivalent diameter. Theoretical analysis indicates that the shape of a particle has a significant impact both on its equivalent diameter and hence on its outer surface area.Microscopic observations demonstrate the particle fraction with diameters less than 0.075 mm, produced from crushing coal samples, mostly takes on a spherical or ellipsoidal shape, and experimental data also show this part of particles consists of 30%–50% surface area newly generated from crushing operation,though these fine coal accounts for only less than ten percentages by weight. Further, analysis of experimental data indicates that the total surface area of this particle size fraction varies exponentially with input crushing energy, and the specific area energy is not a constant but probably in association with physical properties and textures of material.

新型螺旋钻采煤机的设计及试验

针对旧式螺旋钻采煤机工作过程存在机组体积庞大笨重、拆装钻杆难度大、效率低等问题,设计出一种适合400~500 mm厚极薄煤层开采的新型螺旋钻采煤机。采用四钻头结构,通过左右钻杆传递动力给前端传动齿轮箱,带动四个钻头同时钻进。该采煤机在试验过程中取得了良好的效果,提高了工作效率,降低了工人的劳动强度。

“双碳”目标下我国煤炭利用面临的挑战与机遇——立足能源与材料双视角,探讨煤炭综合利用新途径

实现“碳达峰、碳中和”是我国现阶段能源发展的重要战略目标。煤炭作为我国能源最富足的炭基资源,其低碳发展更是刻不容缓。习近平总书记明确指出,如期实现“双碳”目标,需要持续深入推进我国在产业结构、能源结构等方面转型升级。该文从现阶段我国煤炭利用与碳排放情况出发,科学认识煤炭综合利用与双碳双控政策,厘清煤炭如何科学减量化、如何转变煤炭利用属性、如何高效高质量低碳化综合利用的问题,进而对我国煤炭综合利用路线进行分析并提出合理建议。

煤炭与新能源融合发展场景与关键技术

煤炭与新能源融合发展对我国能源转型和能源安全稳定供应具有重要的支撑作用。本文立足我国资源禀赋并考虑能源保供与转型需求,阐述了煤炭与新能源融合发展的重要意义,系统剖析了煤炭与新能源融合发展具备的基础条件。从煤炭开发,燃煤发电,煤化工,碳捕集、利用与封存(CCUS)分别与新能源融合的4个场景角度出发,总结了当前煤炭与新能源融合的主要形式、技术特征、应用情况等。着重关注煤炭开发与新能源融合、“风光火储”联合调度、太阳能光热与燃煤发电融合、太阳能光热与CCUS融合、绿氢与煤化工融合等5类技术,深入分析了煤炭与新能源融合技术体系的发展挑战与突破方向。研究建议,将煤炭与新能源融合发展上升为国家战略,系统推进煤炭与新能源融合发展,加大煤炭与新能源科技研发力度,完善煤炭与新能源融合发展相关的财政、金融和人才支持政策。

新质生产力背景下煤氢产业协同助力煤炭行业绿色转型路径浅析

为了推动煤炭行业新质生产力加快发展,需提升煤炭行业的科技与绿色生产力,进一步加强煤炭清洁高效利用。通过探讨煤氢协同与煤炭新质生产力形成的关联关系,进而提出煤氢协同促进煤炭新质生产力形成的路径与对策。研究认为,煤氢协同能够促进煤炭行业新质生产力的形成,煤炭助力氢能,即通过煤制氢、副产气制氢并结合CCUS技术,实现煤氢绿色发展;氢能助力煤炭,即在煤炭运输环节中降低碳排放量,助力煤炭行业的绿色转型。同时,将我国煤炭新质生产力划分为科技化与绿色化两方面,并提出煤氢协同促进煤炭行业绿色转型的阶段性挑战与相关对策。