Smart industrial IoT empowered crowd sensing for safety monitoring in coal mine

The crowd sensing technology can realize the sensing and computing of people,machines,and environment in smart industrial IoT-based coal mine,which provides a solution for safety monitoring through distributed intelligence optimization.However,due to the difficulty of neural network training to achieve global optimality and the fact that traditional LSTM methods do not consider the relationship between adjacent machines,the accuracy of human body position prediction and pressure value prediction is not high.To solve these problems,this paper proposes a smart industrial IoT empowered crowd sensing for safety monitoring in coal mine.First,we propose a Particle Swarm Optimization-Elman Neural Network(PE)algorithm for the mobile human position prediction.Second,we propose an ADI-LSTM neural network prediction algorithm for pressure values of machines supports in underground mines.Among them,our proposed PE algorithm has the lowest average cumulative prediction error,and the trajectory fit rate is improved by 24.1%,13.9%and 8.7%compared with Kalman filtering,Elman and Kalman plus Elman algorithms,respectively.Meanwhile,compared with single-input ARIMA,RNN,LSTM,and GRU,the RMSE values of our proposed ADI-LSTM are reduced by 36.6%,52%,32%,and 13.7%,respectively;and the MAPE values are reduced by 0.0003%,0.9482%,1.1844%,and 0.3620%,respectively.

China＇s Progress for Modern Coal-chemical Industry

介绍了我国现代煤化工项目的投产情况以及近年来取得的自主技术装备广泛应用、带动资源地区经济转型发展等业绩;指出煤化工产业仍存在工艺技术需进一步优化、产业布局难度大、环境保护和碳排放压力大、盈利能力受能源价格影响大等问题;提出扎实做好已投产示范工程达标达产、适时推进升级示范工程有序建设的发展趋势。

CO2 and SO2 emission characteristics of the whole process industry chain of coal processing and utilization in China

The total coal consumption in China is on the rise.The characteristics of CO2 and SO2 emissions in the whole process of coal processing and utilization in China are worthy of study.Based on the five links of the whole process of coal production and utilization,including coal production,raw coal processing,logistics and transportation,conversion and utilization and resource utilization,this paper summarized and analyzed the energy consumption and pollutant emission sources of these five links,combined with the US Environmental Protection Agency’s AP-42 method and IPCC method,to calculate total pollutant discharge and emission factors,where the emission factors were corrected by conversion efficiency.At the same time,uncertainty analysis is performed about CO2 and SO2 emissions.The results showed that CO2 emissions were 3.657 billion tons,and emission reductions were 61 million tons,and SO2 emissions were 4,844,500 tons,and emission reductions were 10.3595 million tons in 2015.

The catalytic effect of the Na and Ca-rich industrial wastes on the thermal ignition of coal combustion

The catalytic effects of four industrial wastes,namely,the soap residue(SR),brine sludge(BS),calcium carbide residue(CCR),and white lime mud(WLM),on coal thermal ignition were investigated.The acidity of palmitate anion associated with Na+in SR was lower than that of chloride anion combined with Na+in BS,which resulted in an improved the combustion of SR.The acidity of OH-anion combined with Ca2+in CCR was lower than that of CO32-anion combined with Ca2+in WLM,resulting in CCR exhibiting a better catalytic effect on coal ignition.The alkaline metal Na had lower initial ionisation energy than the alkaline earth metal Ca.Therefore,the Na-rich SR exhibited higher catalytic activity on coal ignition than Ca-rich CCR.The ignition temperature of coal with 0.5%SR decreased from 544 to 503°C.

Potential Impact of Carbon Emission Tax on Coal Chemical Industry

In the case of carbon emission tax,implementation target and effect of carbon emission tax are analyzed. For development status of Chinese coal chemical industry,carbon emission data of traditional and new coal chemical industries are contrasted and analyzed,and the impact of levying carbon emission tax on coal chemical industry is studied. Promotion implementation opinions of carbon emission tax in coal chemical industry are proposed,and coordinated development between China environmental taxation system and relevant industries is further explored.

Status and Suggestion for Modern Coal Chemical Industry and Coal Clean Technology

Coal is fossil fuel abundant and widespread all over the world. It is a vital resource for energy security in our country, because the supply is stable. In this paper, the important role of coal played in the total primary energy supply was described, and the status of modern coal chemical industry and clean coal technologies was analyzed. Based on the scientific research experiences of author, strategy and suggestion for Chinese development were proposed according to the regulation of scientific panning. In China, there are more social benefits and strategic meaning for developing the coal high-efficiency utilization technology. Considering of the general situation of our countries, these technologies with the features of can be industrialized, advanced, applicative, mature and feasible should be developed preferentially. The high-expend, low economic effectiveness and behindhand technologies should be abandoned. So, the development of coal clean technology in China should meet the natural resources, restrictive condition and elements of our countries industry situations. Based on these analysis, the most important technologies and fundamental researches should be prior developed in China.

China's Strategic Measures to Develop Coal Industry During the Period of the Ninth Five-Year Plan

A reporter for China’s Foreign Tradehas learned from the Ministry of theCoal Industry that China will takethe following steps to develop its coal industryduring the ninth five-Year plan period. 1. To regulate the policy for buildupthe coal industry and to make a good job ofthe comprehensive development of buildinga number of key coal production bases.

Major Changes in Coal Industry

In recent years, facing the unprecedented difficulties andchallenges such as fuel price increase, supply tension of powercoal and increasing pressure of environmental protection, thesurvival of power enterprises is subjected to certain squeeze.Theimpactofcoalindustryonthepowerindustryisincreasing.Since the foundation of the new China, coal is prominentin China's primary energy production and consumption. Inrecent years, with the continuing rise of the international oilprice, coal becomes more important i...

The Goal Set For China's Coal Industry During the Ninth Five-Year Plan Period

Coal is China’s principal source of energy,accounting for about 75percent of primary energy.This pattern will remain unchanged fora long period of time from now on.Thanks to the efforts made duringthe Eighth Five-Year Plan period,the general situation for the coalindustry is now good.

Analysis of Contradiction Between Coal and Power Industry

At the beginning of 2008, the Central, East and South China suffered a rare snow and ice disaster. After the disaster, power generation and power grid enterprises faced a big problem of power coal supply.

Present Status of China's Coal Industry

Coal is China’s principal source ofenergy, accounting for about 75percent of primary energy. This patternwill remain unchanged for a long period oftime from now on. Thanks to the effortsmade during the Eighth Five-Year Plan period,the general situation for the coal industry isnow good.

Prospect of Clean Coal Technologies to be Used in Fujian Province Power Industry

This paper is based on the existing status and development prediction of Fujian power industry, and describes that the structure of energy sources for generating power which will mainly use coal, will not be changed in the 2010s and 2020s in Fujian Province. In order to meet the requirements of high efficiency and envirofimental protection, the usage of clean coal technologies for power generating will be an inevitable option and the technologies will occupy the important position in Fujian power industry. This paper puts forward the staged targets and measures of developing and utilizing clean coal technologies, suggests that all government depotments related should give support and guarantee in policies and conditions, and welcome technical and economic cooperation at home and abroad, which is good for co-development of both parties.

Semi-Industrial Test of Underground Coal Gasification In Well No.2 in Xinhe, Xuzhou

The necessity of underground coal gasification is explained. The condition,technology character,and process of the semi-industrial test of underground coal gasification in well No. 2 at Xinhe, Xuzhou,are introduced. The test results indicate that the technique of long tunnel,large sectiou,two stage underground coal gasification can obtain a large output of coal gas with a high heat value, making the working process stable. So the feasibility of the new techuology is verified. It can be concluded that there will have a good application prospect of the technique in China.

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。

中国露天煤矿70年成就回顾及高质量发展架构体系

露天煤矿作为我国煤炭工业的重要组成部分,具有生产能力大、开采成本低、安全条件好等优势,近年来在建设规模、生产总量、开采工艺及技术装备等多方面均取得了跨越式的发展,有力保障了煤炭作为国家能源安全稳定供应的“压舱石”地位。首先回顾了新中国成立后我国露天煤矿70年来的发展历程,将其划分为起步恢复阶段(1949—1979年)、快速发展阶段(1980—1999年)、综合发展阶段(2000—2020年)和智能化初级发展阶段(2021年以后)4个时期;系统总结了每个时期的产量与数量规模、开采理论与技术、开采工艺与装备、资源开发与环境保护方面取得的突出成就。然后,探讨了现阶段露天煤矿发展面临的4个方面的主要问题,包括发展布局不均衡、可持续发展面临瓶颈、关键技术难题需深入攻关、人才短缺培养机制不完善。最后,提出构建以“安全、高效、绿色、低碳、智能”为总体目标的全链条、全周期、全要素露天煤矿高质量发展架构体系,其内涵特征包括以时效边坡理论、开采扰动指数理论、绿色开采理论、生态型开采理论、零碳负碳开采理论、智能化开采理论6种学术思想为理论基础,以灾害安全监测防控、复杂条件协同保障、生态源头减损开采、节能减污清洁利用、数字-自动-智能同建5类技术体系为核心支撑,以透明地质模型动态重构、边坡蠕滑全程精准预测、深大孔低扰动控制爆破、采空区超前探测与处置、粉尘抑制及煤自燃防治等30项关键技术为重点突破,以设计理念先进化、安全保障标准化、建设规模大型化、生产工艺综合化、开采装备智能化、核心制造国产化、矿区生态绿色化、煤炭利用清洁化、组织管理科学化、人才队伍国际化的“十化型”露天矿山为建设任务;同时给出了以规划引领为基础,以科技创新为驱动,以人才培育为保障的露天煤矿高质量发展实现路径。最终为推动我国露天煤矿向持续健康高质量方向发展提供指导。

冲击载荷下含瓦斯煤动力学破坏特征与瓦斯渗流规律分析

为探究不同冲击载荷和瓦斯压力作用下的含瓦斯煤动力学特征、裂隙扩展及瓦斯渗流变化规律,采用含瓦斯煤岩冲击损伤-渗流试验系统开展含瓦斯煤冲击试验以及原位渗流测试,并结合工业CT扫描系统进行试样裂隙结构的三维重构,分析含瓦斯煤内部裂隙扩展特征及其对瓦斯渗流的影响规律。研究结果表明,冲击载荷和瓦斯压力对含瓦斯煤的动力学性质、变形过程、裂隙扩展和渗流规律均具有重要影响,具体表现在:①受围压和轴压的影响,冲击载荷耦合瓦斯压力条件下的含瓦斯煤应力-应变曲线无明显压密阶段;含瓦斯煤的变形过程主要经历了弹性变形阶段、应变强化阶段及破坏阶段。②冲击载荷的增加对含瓦斯煤动力学参数具有强化作用,气体压力的升高则劣化了含瓦斯煤动力学参数;冲击载荷越大,瓦斯压力越高,含瓦斯煤的裂隙扩展愈充分,所形成的裂隙结构愈复杂。③含瓦斯煤的渗流规律受控于裂隙扩展,冲击载荷耦合瓦斯压力作用下,含瓦斯煤中存在孔隙流动、孔隙流动-裂隙流动并存及裂隙流动等3种气体流动形式;含瓦斯煤冲击破坏后,随着气体压力增加以及气楔作用的增强,瓦斯流动形式可由孔隙流动依次转变为孔隙流动-裂隙流动并存和裂隙流动;裂隙扩展和流动形式共同影响含瓦斯煤渗流规律,含瓦斯煤渗透率随瓦斯压力的增大总体上符合先增大后减小的变化趋势。

废弃煤矸石资源化利用研究进展

随着社会的高速发展,工业废物堆积造成的环境问题日渐严重.煤矸石是一种煤炭开采和洗选过程中产生的典型工业废弃物.其大量堆积不仅占用土地资源,而且还会污染环境,引起地下水污染,造成山体滑坡、塌陷等地质灾害,严重威胁人类生存环境.近年来,“以废治废”模式成为了工业废弃物处置的研究热点之一,也是生态修复的重要研究方向.本文综述了煤矸石资源化利用的研究进展,进一步阐述了污泥改性煤矸石在生态修复与土壤改良方面的进展,为后期煤矸石和污泥的高值化利用奠定基础.

关于黑龙江省水煤浆产业发展的建议

为促进黑龙江水煤浆产业发展,分析水煤浆产业发展现状,探讨进一步加快发展水煤浆产业的建议,如政府主导统筹协调发展,地方推动配套工程示范,坚定落实绿色发展战略,增加核心技术储备等。

“6矿”协同视角下促进煤炭新质生产力形成的路径与对策

发展新质生产力给煤炭行业的转型升级与高质量发展持续注入新的动能。本文通过梳理我国煤炭新质生产力形成的基础条件,以矿工、矿山、矿企、矿城、矿区、矿业(“6矿”)为切入点,创新性地从“6矿”理念出发探讨“6矿”协同与煤炭新质生产力形成的关联关系,进而提出了“6矿”协同促进煤炭新质生产力形成的路径与任务。研究认为,我国发展煤炭新质生产力已经具备一定的基础,通过“6矿”协同将形成以矿工为中心、矿山为基石、矿企为抓手的煤炭行业优势生产力,向矿城、矿区的推广辐射将形成煤炭行业融合生产力,最终形成代表先进矿业形态的煤炭行业衍生生产力。同时,划分我国煤炭新质生产力的形成阶段为优势发展期、融合发展期和衍生发展期,提出了以“6矿”协同促进煤炭行业高质量发展与煤炭新质生产力形成的主要路径、阶段性任务与相关建议。