Height of water-conducting fracturedzone in fully-mechanized top-caving mining under weakly cemented sandy conglomerate aquifers
SUN Weitao
WANG Wenjie
Abstract：Water-sand inrush disaster are easy to occur when mining under weakly cemented sandy conglomerate aquifers.The height of water-conducting fractured zone is an important parameter for weak cemented roof water prevention and control.Based on the conditions of fully-mechanized top-caving mining under weakly cemented sandy conglomerate aquifers in the I01163上01 working face of Mindong No.1 Mine,the development height of water-conducting fracture zone was studied using a combination of field test and numerical simulation.The observation of drilling flushing fluid leakage and groundwater level shows that the development height of water-conducting fractured zone is 85.50m,and the ratio of the height of water-conducting fractured zone to the mining height is 10.69.ADINA numerical simulation shows that the development height of water-conducting fractured zone is 70m,and the ratio of the height of water-conducting fractured zone to the mining height is 8.75.Based on the combination of two technical methods,the ratio of the height of water-conducting fractured zone to the mining height was determined to be 10.7.The research results have reference value for the prevention and control of weak cemented sandy conglomerate roof water under fully-mechanized top-caving mining.
Keywords：weakly cemented sandy conglomeratefully-mechanized top-caving miningwater-conducting fractured zoneADINA
Publication Date：2024-11-28
Online Publishing Date：2025-12-24(First online date of this platform, not the publication date of the document)
Pages：5( 111-115 )