Abstract
With the gradual development of deep coal mining, the demand for roadway support strength is also increasing. For ordinary grouting materials, it cannot be injected into ultra-fine pores, and the tensile strength of its consolidated body is not high. Therefore, in this paper, ultra-fine cement and carbon fiber are used as the raw materials of the grouting fluid to increase the injectability of its fine pores and the tensile strength of the consolidated body. By designing experiments with different carbon fiber content, the grouting material with the best mix ratio was formulated. The test results show that: after the grouting material is mixed with graded sand to prepare a test block, the mechanical properties of the grouting material are optimal when the carbon fiber content is 1%, and the compressive strength is 17MPa and the tensile strength is 1.34MPa.
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