Abstract: The paper described the principle and plan of the compact grouting technology,introduced the application of this technology in civil engineering construction at Tianzhuang coal preparation plant,and analyzed the benefit obtained by using this technology in Tianzhuang coal preparation. The construction practice show that by using the compact grouting technology,effectively avoided the effect of digging pit in the workshop on the safety running of equipment,and greatly improved the bearing capacity of foundation,solved the problems of uneven settlement of and unstable of backfill material.