Experimental research on the movement process of mixed water and sand flow across overburden fissures in thin bedrock induced by mining
Abstract：Based on the engineering geological modes of quicksand inrush induced by coal mining under the thin bedrock and thick unconsolidated formations,a test model of the mixed water and sand flow transfer and inrush was designed.The variation characteristics of water pressure in different position of the fissure channel were revealed by considering the various compositions of the flow and variations of the width of the fractured channel under the water pressure of 0.05 MPa and 0.10 MPa.Geological information of the mixed water and sand flow transfer for the various compositions of the flow,water pressure and the channel feature was quantitatively studied.The water pressure variation curves in the different positions were gained from different model tests.The relations between the channel width and the velocity of the mixed water and sand flow in the fractured channel were analyzed.The relationship between time and sand production volume of the mixed water and sand flow channel overflows was obtained from observational results.
Keywords：thin bedrockfissure channelmixed water and sand flowmodel test
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)