Mining technology gob key to the success depends on a stable overlying strata gob of time and location. Mining stope surrounding rock stress redistribution exercise-induced dynamic stresses acting on the rock pit and make state disaster is the root cause of mine disaster occurred. Layered thick seam fully mechanized roadway layout (including internal fault

external fault and vertical)

reasonably determine the coal pillar size

roadway methods and parameters to the greatest possible self-supporting ability to play rock

is to improve the stability of the important roadway guaranteed. Stable internal stress field in the range of small pillar supporting roadway layout

can significantly improve the surrounding rock stress state

greatly improving the recovery rate. Through theoretical analysis

numerical simulation and field measurement methods such as

for layering under thick seam gob roadway layout small pillar of different designs

through analyzing and comparing the stress and strain and displacement of pillars to determine the thick coal seam under the sub-layer along gob roadway reasonable position and pillar dimensions and overlying strata control techniques

and get engineering validation is accurate and reliable

Thus little thick seam mining technology provides an important scientific basis.