Design and Effectiveness Evaluation of Automatic Tunneling without Coal Pillars for Roof Cutting and Pressure Relief
In response to the problems of high roof pressure and low coal resource recovery rate in a certain coal mine,an implementation plan for pre cracking and cutting seams of the roof was formulated,and a temporary support plan for the roadway was designed.Through actual experiments,the results showed that the bottom bulge was about 98 mm,the subsidence of the roadway roof was about 177 mm,the deformation of the solid coal slope was about 88 mm,the deformation of the goaf slope was about 125 mm,and the shrinkage rates of the two sides and the roof were 4.26％and 8.6％,respectively.This reduced the roof pressure,extended the service life of the mine,and generated a total revenue of about 8.9 million yuan.
top cutting pressure reliefnon pillar miningconceptual design
NETL
NSTL
万方数据
