Design of Section Coal Pillar Based on Breaking Characteristics of Key Blocks
In order to quickly determine the width of the coal pillar in the section of the 42204 working face of Buertai Coal Mine,the influence of different key blocks on the bearing characteristics of the coal pillar was analyzed by means of numerical simulation,and combined with the limit equilibrium theory,the best design was determined that the width of the coal pillar in the section was 25 m.The practical engineering application results show that the 25 m section coal pillar effectively maintains the stability of the roadway,and the lateral displacement of the coal pillar is within a reasonable range.While ensuring the stability of the roadway,it indirectly improves the economic benefits of the mine and meets the production needs of the mine.