Prediction and Backfill Mining Technology of Ultra Thick Seam in Goaf of Small Mine
Abstract：According to No. 2 and No. 3 mining blocks affected by the mining failure in a small mine, the spontaneous combustion, un- certain conditions of mine water ponding and gas accumulation, poor roof support and others in the goaf of Underground No. 2 Mine, a transient electromagnetic method was firstly applied to determine the failure scope of the previous mine, then an advancing borehole was applied to detect the certain geology of the coal mining face and to detect the goal structure and surrounding rock stability of the previous small mine and finally to detect the accurate location of the gateway of the goaf in the small mine, the related location of the goaf space in the small mine, the inner space size of the goaf in the small mine, as well as the inner water, gas and upbuildings conditions in the goaf of the small mine. A certain backfill re-mining plan was determined finally according to the detection results. With the detection conduc- ted on No. B909 coal mining face, seven goaf in the small mine within the coal mining face were fully backfilled. When the coal mining face moved forward to the backfilled goaf, there was no roof leakage and spalling occurred.
Keywords：ultra thick seamgoaf of small minebackfill miningtransient electromagnetic methodadvance borehole detection
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 41-44,48 )