Experimental Research on Influencing Factors and Ratio Optimization of New High Fluidity Borehole Sealing Material

Abstract

This paper takes the fluidity of the sealing material as the main research indicators. Using the Design-Expert 8.0.5 trial software designed orthogonal experiments and establishing a quadratic model between liquidity and each test factor, which showed the impact of each key factor on the fluidity, the optimal ratio of high-fluidity borehole sealing materials was obtained. The results showed that the key factors had the following order of significance: water-cement reducing agent > water-cement ratio > retarder > expansion agent, comprehensive consideration of expansion rate, compressive strength and setting time. The optimal percentages were found for the high-fluidity borehole sealing material: a water-cement ratio of 1, along with 0.03% retarder, 0.5% water reducer, and 8% expansion agent. These research results could provide a reference for improving the performance of gas drainage borehole sealing materials and enhancing the effect of gas drainage.

Keywords

• borehole sealing material
• high fluidity
• optimal ratio
• orthogonal experiment
• significance