Abstract
Summary In order to identify the occurrence conditions and structural development characteristics of the main mineable coal seams in coal mining area, permanent downhole fiber-optical distributed Acoustic sensing deployment was implemented in two boreholes in the Ningtiaota Coal Mining Area in Northern Shaanxi Province, China. DAS seismic data are acquired according to the designed zero offset and offset VSP geometry. The original single shot data acquired by this DAS test have achieved high signal-to-noise ratio of direct arrival and strong reflection of upgoing primary wave in coal seams, which can accurately reflect the actual depth position of coal seam, and the quality of seismic data is good. Compared with conventional VSP, DAS has the advantages of simple operation and low cost and will become a new technology of coal downhole seismic data acquisition.
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