Research on Prevention and Mechanism of Roof Water Inrush Under Low Permeability Aquifer for Thick Coal Seam
LI Hong-jie
CHEN Qing-tong
MU Yi
Abstract：In order to obtain the water inrush mechanism of roof under ultra thick and low permeability aquifer,the variety of methods were carried,including observation of drilling fluid leakage volume,geophysical prospecting,observation of television and numerical simulation. The results showed that the presence of low permeability thick-sandstone aquifer underlying impermeable shale layer in the overburden rock and the ratio 12.51 of the height of the fractured zone to the mining height which spreaded to the sandstone aquifer provide water source,channels and other internal conditions. Through the study of mine transient electromagnetic method and numerical simulation,the storage water space which under mining conditions the combination structure of sandstone and shale( hard rock and soft rock)lead to dis-turbance shale remodeling to form was determined,when the water closed in the storage water space reached a certain degree,with the periedic weighting of main roof and a large area of collapse,the separation water bag burst and instantaneously spurtted into mine,leading to water irruption.On this basis,summing up the methods and experience of abscission layer water effective drainage in process of mining, which provided a valuable reference for similar to water damage prevention.
Keywords：roof water disasterseparation waterwater inrush mechanismheight of fissure zone and caving zonewater disaster prevention and control
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 28-31 )