Research on Retention and Grouting Reinforcement Technology of Small Coal Pillars in Fully Mechanized Mining Face
In response to the problems of excessive width of the protective coal pillar,resource waste,and severe deformation of the mining roadway in Changping Coal Industry Co.,Ltd.,Jinneng Holdings Equipment Manufacturing Group,the causes of coal side anchor mesh pockets and roadway bottom bulge were analyzed.Using field measurement and numerical simulation methods,the width of the small coal pillar was comprehensively determined to be 6.0 meters,and a grouting reinforcement control plan for the small coal pillar was proposed.On site indicator verification:The surrounding rock control effect of the small coal pillar roadway is good.
Protective coal pillarMining roadwaySurrounding rock deformationGrouting reinforcement
NETL
NSTL
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