Abstract:

China is a country with abundant reserves of thick coal seam, based on this background, research to improve the special thick seam mining rate method. By using FLAC2D numerical simulation software to analyse the different coal pillar width internal stress and displacement distribution, analysis of Y direction of displacement and stress of knowledge with small coal pillars and width of coal pillar of roadway to protect basic agreement. In 1210 working face roadway with small coal pillar during 5m and 30m wide coal pillar to industrial test in site, and through the comparison of the different coal pillar width range electromagnetic radiation data and vibration spectrum prove that 5m small coal pillar can stable to roadway protection, as the special thick seam raise stoping rate provides a the new train of thought.

Key words: special thickness seam, coal pillar width, FLAC2D numerical simulation, electromagnetic emission, vibration spectrum