DOI: 10.11799/ce202503011
Mechanism and prevention technology of roof water inrush in low-lying section of thin coal seam mining face
LI Ji
WU Jieqi
CHEN Chaosen
DONG Jihui
QIANG Xubo
ZHENG Yingjian
CHEN Zhong
Abstract：Aiming at the problem of frequent roof water gushing in the mining face of Xuyong No.1 Coal Mine with soft bedrock in Guxu Mining area,we adopted the methods of field measurement,similar material simulation and numerical simulation to probe the damage range of the overlying rock of 1599 working face,and probed into the failure characteristics of the overlying rock and the evolution law of the"vertical three zones"of the working face.On this basis,the development characteristics of overlying rock water gushing channel and roof water gushing mechanism of thin coal seam with soft bedrock were revealed.The research results show that the strike distribution of the C19 coal seam is uneven,and when the 1599 working face is drawn to the 80 m low-lying section,under the influence of mining,two key layers in the overlying rock are broken,and longitudinal cracks develop upward to form water gushing channels and connects to the Changxing aquifer,and a large amount of water gushed to the working face causes frequent water gushing.For this reason,the joint control of deep and shallow hole grouting and advance drainage measures was put forward for the roof strata in the low-lying section of 1599 working face.
Keywords：soft bedrockthin coal seamoverburden failurewater inrush channel
Publication Date：2025-03-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 72-79 )