Greenhouse gas emissions from shallow uncovered coal seams

查看全文 作　　者：Saghafi [1]Abouna

机构地区：[1]CSIRO Energy Technology North Ryde, NSW 1670, Australia

出　　处：《International Journal of Mining Science and Technology》索引2014年第24卷第3期,共4页

基　　金：the CSIRO;the Australian Coal Association Research Program 摘　　要：This study discusses a method of quantifying emissions from surface coal mining that has been trialled in Australia. The method is based on direct measurement of surface emissions from uncovered coal seams in mine pits, concurrent measurement of residual gas content of blasted coal in mine pits, and measurement of pre-mining gas content of the same seam from cores retrieved from exploration boreholes drilled away from active mining. The results from one of the mines studied are presented in this paper. In this mine,the pre-mining gas content of the target seam was measured using cores from an exploration borehole away from active mining. Gas content varied from 0.7 to 0.8 m3/t and gas composition varied from16% to 21% CH4(84–79% CO2). In-pit measurements included seam surface emissions and residual gas content of blasted and ripped coal. Residual gas content varied from 0.09 to 0.15 m3/t, less than twofold across the mine pit. Composition of the residual gas was in general 90% CO2and 10% CH4, with slight variation between samples. Coal seam surface emissions varied from 1.03 to 7.50 mL of CO2-e per minute and per square meter of the coal seam surface, a sevenfold variation across the mine pit. 关键词：温室气体排放量煤层露天煤矿开采同时测量气体含量组成变化残留气体澳大利亚

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Greenhouse gas emissions from shallow uncovered coal seams

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