Title: Determination of reasonable position of cut open for lower layer in mining of the close coal seams
Abstract: In China,close distance seams group take up great percentage in coal resource distribution. To ensure reasonable position of cut open of lower layer in mining of the close coal seams,based on the work face 10- 110 of MU- Gua mine,numerical UDEC was used to simulate the mining process of the10 coal seam and analyze the movement form of overlying strata of 10 coal seam. We obtained the reasonable position of cut open of lower layer in mining of the close coal seams. The main conclusions are as follows: after the upper coal seam mined,at a distance of 5 m cut gob edge stress concentration peak position from open cut 15 m occurred the minimum stress,the open cut should be arranged in this area;the supremacy of coal seam occurs the larger pressure in where mines open cut and stopping line position,should take special support measures. The study provides technological support for safe mining of open cut in close coal seams.
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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