Method for filling bilateral parts beside pillar with repeatedly-mined left-over coal pillars in residual mining area
A technology for leftover coal pillars and residual mining areas, which can be used in fillings, ground mining, mining equipment, etc., and can solve problems such as instability and damage, surface subsidence buildings, railway and water damage, rock bursts, etc.
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[0030] The present invention is further illustrated by the following examples, but not limited to the following examples.
[0031] The Baijiazhuang Coal Mine of Xishan Coal and Electricity Group is a typical resource-scarce old mine, facing many problems such as stabilizing output, increasing productivity and economic benefits. In the 1990s, the No. 8 coal seam 38502 (2), 38502 (3), 38502 (4) and 38502 (5) working faces of Baijiazhuang Coal Mine were mined by the knife column method, which made a large number of remaining coal pillars and Abandon mining. The remaining coal pillar in the knife pillar residual mining area of No. 8 coal seam has good mining value, and has increasingly become the focus of researchers and engineers in recent years. The re-mining of the remaining coal pillars in the residual mining area can not only recycle valuable coal resources, but also avoid the occurrence of dynamic disasters such as instantaneous instability or "domino" instability of the ...
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