Determination on Rational Location of Final Terminal Mining Line for Protective Seam Pressure Releasing and Mining in Two Seams
Abstract：In order to study the stress distribution evolution of the surrounding rock during the protective seam mining process and to study the dynamic law influenced to the front floor gateway, based on the transmission law of the mining support stress in the front seam and seam floor, the FLAC2D was applied to simulate and analyze the surrounding rock stress distribution features of the mining face with differ- ent coal pillar width under the protective seam mining process in No. 11 seam as in No. 13 seam. The FLAC2D was also applied to monitor and measure the surrounding rock deformation of the gateway. The results showed that during the low protective mining process, 110 m coal pillar left could reduce the mining activities affected to the front floor gateway and when the mining operation was in the top protected seam, the final terminal mining lines set for the two seams should be eliminated at the same location and the distance between the two lines should be 30 - 50 m in order to reduce the overlying influences of the mining stress.
Keywords：protective seam mininglocation of final terminal mining linesurrounding rock stresswidth of coal pillar
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)