Technical Overview
Gainike Inorganic High-Efficiency Filling Material for Closed Wall (JCT-Ⅰ) is a specially developed inorganic filling material for efficient filling and blocking of permanent closed walls. The material consists of two powder components, Material A and Material B. According to on-site requirements, it is mixed with water in a certain proportion to make a premix, which is then fully mixed by a slurry mixing device to form an inorganic solid material. After the mixed slurry is poured into the cavity of the permanent closed wall, on the one hand, it has a good function of penetrating and blocking broken holes and cracks in the surrounding rock; on the other hand, it can achieve a complete roof-contacting effect.
Compared with traditional loess filling, which has practical problems such as large transportation volume, difficulty in roof contact, and long-term sedimentation leading to air leakage, this filling material features efficient construction, sufficient roof contact, and good effect stability.

Technical Characteristics
(1) High construction efficiency: Transporting 1 ton of the material can fill 10 cubic meters of space, and its efficiency is more than 10 times that of loess-based filling materials.
(2) Excellent roof-contacting effect: The highly permeable slurry, with pressure grouting, can completely fill the space inside the wall, including the surrounding rock pores, achieving 100% roof-contacting and full filling. This can effectively ensure the air leakage blocking effect of the permanent closed wall and surrounding rock.
(3) Good long-term blocking effect: The final formed high-solid-water hardened consolidated body has no sedimentation or shrinkage. After consolidation, the material can form a stable filling body with the surrounding rock, featuring good and long-lasting air leakage blocking performance.

Application Process
The preparation of Gainike Inorganic High-Efficiency Filling Material for Closed Wall (JCT-Ⅰ) involves adding two powder components (A and B) into the preparation system in a 1:1 ratio respectively. In the preparation system, an agitator is used to fully stir the aqueous solutions of Material A and Material B (with a water-to-material ratio ranging from 3:1 to 10:1). A pneumatic grouting pump is then used to extract the uniformly stirred aqueous solutions of A and B, which are fully mixed in a mixer. Finally, grouting and filling construction is carried out in the permanent closed wall through grouting pipelines.