Cause Analysis of Roadway Floor Heave and Its Control in Hongshiyan Coal Mine
ZHANG Enqiang
ZHANG Junhua
CHEN Yongguang
ZHENG Yanpeng
SONG Kun
JIA Yibing
Abstract：Severe deformation and failure often occurred in the floor of 12406 air-return way in IV winning district of Hongshiyan Mine, for this reason, analysis on the cause of deformation and failure of the soft rock roadway was made and the control measure by reinforcing the roadway side and relieving the floor pressure to control floor heave was put forward in this paper. Comparative study was carried out on the roof and floor displacement and the stress distribution of the roadway in three support patterns of no support, original support and combined support by grouting reinforcement and pressure relief slot with the numerical simulation method. The simulation results showed that the use of the combined support pattern by grouting reinforcement and pressure relief slot can decrease the heave amount of the roadway by half as compared to that by original support pattern and there is an obvious control effect on the floor heave. Calculation and analysis on the parameters of the grouting reinforcement and pressure relief slot were carried out, the combined support pattern can control the severe deformation of surrounding rock, the average heave amount reduced from 1 200 ~1 500 mm by original support pattern to 245 mm by the combined support pattern, this thus ensured the roadway stability.
Keywords：coal mine roadwayfloor heavesoft rockgrouting reinforcementpressure relief slot
Publication Date：2013-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 65-68 )