Abstract:

Take Sangshuping coal mine as an example, the author studied the application of fine aggregate in large flow hydrodynamic grouting. The paper summarized the closure materials of hydrodynamic grouting in grouting, stated the process of water inrush and plugging, analyzed the mechanism of aggregate closure technology and the possibility of hydrodynamic closure with fine aggregate, discussed the technology and method of closure with fine aggregate, and researched the conditions of hydrodynamic closure in Sangshuping coal mine. Practice shows that the mission of closure can be accomplished only using fine aggregate in hydrodynamic plugging that the water inrush flow was 8000m3/h. the analysis shows that it was related to the low hydrodynamic pressure and the large discharge area that the closure mission was completed with sand in Sangshuping coal mine.