Coal gangue is the basis of coal seam structure division,but also an important factor for the impact of coal quality.Therefore,to find out the spatial distribution of coal gangue and the characteristics of coal gangue is a premise to realize the efficient washing and separation of coal and gangue and to control related disasters.Taking the 5-2 coal of Qinglongsi coal mine as the research object,the comprehensive technical means of geological drilling,mine geological survey,petrological a-nalysis,mineralogical analysis and disaster analysis are adopted to find that the lithology of gangue in coal mine is mainly mudstone and kaolinite mudstone,which is distributed in the middle of coal seam and in the whole mine field.By means of rock slice,scanning electron microscope,XRF and whole rock composition analysis,it is found that the mineral composition of gangue is irregular in boundary,the particle size is 0.12～1.8 mm,and the rock cuttings contain extremely fine carbon debris.The samples were moderately dense and developed moderate iron alteration.The primary detritus is brown-red in col-or,or microstructure and dense granular after fire,which is black and opaque.The fissures are developed,and the fissures are filled with calcite.Finally,based on the geological survey and geological drilling,we analyze comprehensively the hazards caused by the mud and slurry of coal gangue,and put forward the corresponding prevention measures.
关键词
夹矸/烧变岩/岩石薄片/扫描电镜/矿井地质调查/地质钻探/青龙寺煤矿
Key words
gangue/burnt rock/rock slice/scanning electron microscope/mine geological survey/geological drilling/Qin-glongsi Coal Mine
万方数据