Study of water-flow fractur-zone height based on the critical value of rock angular displacement
Abstract：The fractured zone through which water flows is one of the important passages where roof crevice water enters the working face. The spatial pattern of the goaf and the characteristic overstress and limited space were used to formulate a criterion for deducing the height of this water-flow fractured zone. The criterion was based on the critical value of rock angular dis- placement. The formula is correct and reliable compared to measured data obtained from the Renlou coal mine. The formula shows that the height of the water-flow fractured zone is linear- ly related to the mining height, the coefficient of bulk, and the critical value of rock angular displacement. As these decrease the height of the water-flow fractured zone increases. The mining height and coefficient of bulk have more influence on the height of the fractured zone through which water flows.
Keywords：water flowing fractured zoneoverstresslimited spacerock angular displacement
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)