Analysis on the causes of ribspalling and roof fall in large mining height working face of coal mine and research on control technology
PENG Yanghao
FU Xiaolong
XUE Feisheng
JI Zhongpeng
LI Guozheng
JIA Xiaoyu
Abstract：During the mining process of thick coal seams with high mining height,rib spalling and roof fall ac-cidents often occur,and are more severe during the period of periodic pressure.Taking the 24208 high mining height working face of Shaqu Mine as the engineering background,comprehensive methods such as on-site mo-nitoring,theoretical analysis,and numerical simulation are used to analyze the main causes of rib spalling and roof fall at the working face,and corresponding prevention and control measures are proposed.The results show that the collapse of the direct roof has a significant impact on the working face,increasing the support load of the support,which is close to the support load when the basic roof is under pressure,causing varying degrees of rib spalling and roof fall at the working face;the support strength of the support,the cutting depth,and the ad-vance speed are the main factors affecting the rib spalling and roof fall at the high mining height working face.Measures to increase the support strength and initial support force,control the cutting depth,and accelerate the advance speed have been proposed.At the same time,the labor system has been changed from the original six-six-twelve system to the four-six system,effectively improving the sinking of the roof and the rib spalling and roof fall situation at the working face.
Keywords：thick coal seamhigh mining heightrib spalling and roof fallinfluencing factorscontrol measures
Publication Date：2024-10-28
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 20-28 )