New Inorganic Grouting Material Applied to Reinforce Broken Surrounding Rock
WANG Mao-sheng
WANG Meng
DU Hai-long
Abstract：In order to analyze the performances of new organic grouting material and applied effect in the broken surrounding rock,a lab ex-periment method was applied to study a water cement ratio affected to three indexes of grout fluidity,setting time and compressive strength and an observation was conducted on the surrounding deformation value and surrounding broken condition of the trial roadway.The results showed that the higher the water cement ratio was and the higher the fluidity would be.When the water cement ratio was 0.7 : 1.0,the spreading degree of the grout would be 265 mm and could meet the requirements.The compressive strength would be reduced with the water cement ratio increased.When the water cement ratio was over 0.9 : 1.0,the compressive strength could not meet the requirements.There-fore,the water cement ratio should be(0.7~0.9): 1.0.After the grouting operation completed,the cracks in the coal would be backfilled and consolidated.The grout consolidation in the borehole would be in sheet with different thickness or in strip,thus the spaces in the bore-hole were compacted and the coal integrality and stability were improved.
Keywords：organic grouting materialbroken surrounding rockgrouting reinforcementstability of surrounding rock
Publication Date：2014-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：4( 8-11 )