Grouting transform technique of aquifer in coal bed floor in Hanwang Coal Mine

Abstract：The floor of 25111 working face has been transformed by using the technology of large_scale grouting transform of thin limestone in coal bed floor. Based on the analysis of hydrogeological conditions of the working face, the planar distribution and structure of blast hole and grouting techniques and so on have been designed in detail. The grouting practice indicats that 25111 working face can be mined safely because of the successful use of the grouting technology, and good effects have been obtained.

Keyword：grouting transform; aquifer; coal bed; floor;