36 Research and Application of Foundation Treatment Technology for Building in Goaf of Small Coalmine

The greatest difficulty for building house on top of the goaf is the foundation treatment. The foundation treatment technology for goaf of normalized coalmine is relatively direct, while for the small coalmine, due to simple extraction mode, random arrangement of excavating faces, and complex conditions of substructure, its foundation shall require unique treatment mode to ensure economy and safety of the buildings. Here, a mode on basis of the geological exploration data of a goal and in combination of natural foundation and various pile foundations with the grout injection solves the problems in foundation treatment, realizes the predicted purpose, and may be helpful for other similar projects.