Actual Measurement of Development Height of Caving Zone and Water Flowing Fracture Zone
On the basis of theoretical calculation considering roof conditions,a new equipment—double-end water-stopped device was used for field measurement,and the height development law of 9+10#coal seam caving zone and water flowing fracture zone in A Coal Mine was studied more accurately by using the underground upward hole subsection water injection leak detection technology.The results indicate that good results were achieved,providing important reference basis for the layout of the working face and water prevention work,ensuring safe and efficient production of the mine.
double-end water-stopped deviceheight of caving zoneunderground upward hole
NETL
NSTL
万方数据
