Survey technology of hidden disaster causing factors on the surface of shallow buried coal seams
Shallow buried coal seam surface of various hidden disaster causing factors restrict the safe,efficient and green mining of coal mines,how to quickly and efficiently identify the types and properties of hidden disaster causing factors on the surface and analyze the state of the mine in combination with mine production is the first problem that needs to be solved.Taking the Qinglongsi Coal Mine in the shallow buried coal seam Xinmin mining area of the Jurassic coal seam in northern Shaanxi as the research object,through satellite remote sensing,low-altitude unmanned aerial vehicles,ground geological surveys,geological surveys,sampling tests,comprehensive anal-ysis and other technologies,the hidden disaster causing factors on the surface was quickly identified.By combining techniques such as underground water inflow observation,multi method exploration of water conducted zone height,big data analysis of mine pressure,gas monitoring and analysis in goaf,numerical simulation,and similar material simulation,a comprehensive study was conducted on the rela-tionship between surface hidden disaster causing factors and mine water damage,roof,fire,etc.The results showed that the hidden disas-ter cansuing factors in the surface of the wellfield were over-deep trench mining,thin bedrock-weathered bedrock,surface open-pit min-ing and its water accumulation,backfilling of open-pit mining,and spontaneous combustion of coal seam outcrops.The above-mentioned hidden disaster causing factors can induce mine disasters such as roofing,moving ore pressure,water and sand collapse,and the influx of toxic and harmful gases.The research results can provide a reference for the investigation and analysis of various hidden disaster factors in coal mines,and provide a basis for the accurate management and disaster prevention of hidden disaster factors on the surface of shal-low buried coal seams.
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