Study On Carbon Emissions Accounting And Carbon Emission Reduction Approach Of Surface Coal Mine

The surface coal mines are active in the low-carbon production projects toenhance the effectiveness of green mining in the context of low-carbon economy. Thelow carbon benefit of energy conservation is obviously. But no clear quantitativeunderstanding for the level of carbon emissions in the process of surface coal mine,which gradually become the limiting factors of low-carbon production in surface coalmines.So this paper study on the low carbon emissions accounting and carbonemission reduction approach for the Surface Coal Mine.Through analyzed the mining process of surface coal mine, it had determined thedirect sources which were fuel (especially diesel, petrol), explosive, effusion,spontaneous combustion, and indirect souce electric power were the five main carbonemission sources. Explosive means the carbon emission caused by blasting. Effusionmeans mining activities that damaged the coal structure caused the greenhouse gasesreleased into the atmosphere. Spontaneous combustion means carbon emissions forcoal spontaneous combustion from coal face and dump. Based on the existingresearch results, the dissertation had provided the carbon emission factor of fuel,effusion, spontaneous combustion and electric power. Based on the explosive basicprinciple, the calculation method of explosive carbon emission factor had been putforward, carbon balance and B–Wilson method, and the carbon emission factor ofexplosive used in surface mine was calculated.With the two main lines of energy consumption and surface mining technologylinks, the dissertation had established two surface coal mine carbon emissionsaccounting models, one was preliminary and the other was based on mining links.Surface coal mine carbon emission preliminary accounting model was establishedaccording to the five parts of carbon emission sources. Surface coal mine carbonemission accounting model that based on production links treated production links asmain foundation and taken preliminary accounting model as auxiliary factor, andclassified perforation, blasting and mining, crushing, transportation, dump, effusionand spontaneous combustion source in surface coal mine, the model was completedbuilt with a total of nine parts.Based on the statistical data of representative surface coal mine in China, whichwere Anjialing, Heidaigou, Yiminhe and Buzhaoba surface coal mine, and accordingto carbon emissions preliminary accounting model for surface coal mine, it had got carbon emission level of these surface mines in past decade, and also contrasted thecarbon emission level of six mining systems. This dissertation had compared carbonemission level of different mining technology by carbon emissions accounting modelbased on the production links in surface coal mine with situation assumption.Theconclusion:when the lift-off system was shovel-truck technology, the comparisonresult of carbon emission level(from high to low） were semi-continuous(crushed inthe pit bottom）, shovel-truck technology, semi-continuous(half of raw coal wascrushed by self-moving crusher in the pit bottom and another half was crushed in theground）, semi-continuous(crushed in the end wall）, semi-continuous(the raw coalwas crushed in the ground）. Transport and mining links had a key impact for the levelof carbon emissions, the proportion about80%in the carbon emissions.When the accumulation years of greenhouse effect was different, the globalwarming potential values of three main greenhouse gases in intergovernmentalclimate change report were different. Accounting the carbon emissions for Anjialingcoal mine in2010with different cumulative years were20,100and500years, thechange for carbon emissions was little that less than1%. Based on the research, studythe the carbon emission accouting in surface coal mine based on timeliness, thegreenhouse effect was allocated to the lifetime, and the corresponding formula wasderivad. Compared with traditional methods, the method which includes timelinesshad a good reflection for the greenhouse effect of greenhouse gases.The carbonemissions of Anjialing n years with the timeliness method was less than traditionalmethods.Combined with the existing technological conditions, it had put forward thecarbon emission reduction countermeasures of surface mine, and also put forwardsome detailed measures to reduce carbon emission, for example reducing diesel andpower carbon emission factor, updating mining system and reclamation in time, etc.For stripping and mining with discontinuous technology, and four kinds of differentforms of semi-continuous technology, the dissertation had quantitative analyzed thecarbon emission reduction ways of technology, electric power and diesel, which hadgood guidance value for surface mine low carbon development.