Advances in Research

The cement − water glass double liquid grouting material is often used in the early reinforcement and temporary plugging of the mine, so the lower material is often subject to greater maintenance pressure. In order to explore the field working performance of cement − water glass double liquid grouting material, this paper explores the influence of different water glass content ( volume ratio of 40 %, 50 % and 60 % respectively ) on the physical density and setting time of the consolidation body based on the indoor test, and simulates three kinds of deep well high water pressure environment ( 0.5Mpa, 1Mpa, 2Mpa ) to analyze the influence of curing pressure on the 7d strength of the consolidation body. The results show that with the increase of water glass content, the density of cement slurry decreases and the gelation time prolongs. With the increase of curing pressure, compared with the consolidation body under normal pressure curing, the compressive strength of the consolidation body with water glass content of 40 % and 50 % decreased first and then increased. When the curing pressure was 0.5 ~ 1Mpa, the compressive strength of the two consolidation bodies decreased by about 23 % and 47 % respectively compared with the control group under normal pressure. When the curing pressure was 1 ~ 2Mpa, the compressive strength of the two consolidation bodies increased by about 10 % and 25 % respectively compared with the control group under normal pressure. The compressive strength of the consolidated body with 60 % water glass content did not change much under three pressure environments.