Detection of Water Abundance of Short-interval Roof Limestone and Research on Water Inrush Risk
ZHU Hengzhong
LIU Ping
WANG Huajun
Abstract：To counter to the situation whether the water inrush hazard existed or not in the short-interval roof limestone aquifer in 1102 working face in a mine, deep study was carried out on the division of the water abundance zone in the roof limestone, the stability of overburden rock structure and the development characteristics of the water flowing fractures with transient electromagnetic detection method and UDEC numerical simulation method. The study results showed that: ① The roof limestone aquifer has two strong water-bearing zones, one moderate water-bearing zone and two weak water-bearing zones; ②The developed fractures in the overburden rock of coal 1 concentrated in the backside of the mined-out area, the front coal wall and the middle bed-separation zone of the working face, the fracture developmental height nonlinearly increased with the increase of the gob span, the fracture developmental height increased suddenly in 40 ~120m eavation, the fractures developed to the limestone aquifer in 70m excavation and 22m development height;③15m-thick sandstone acted as a water-resisting layer, and less water inrush hazard existed in the working face;④A new chemical grouting material - the modified urea formaldehyde resin was successfully applied for the water control test in the working face and remarkable effect was obtained.
Keywords：roof limestone aquiferfracture developmentwater inrush hazardflooding prevention and controlmaterial for block-up water grouting
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 60-63 )