The scientific and technical journal, “Bulletin of the Association of Drilling Contractors”, is listed by the Higher Attestation Commission of the RF Ministry of Education and Science as one of the leading refereed journals and publications that feature main scientific results of doctoral and candidate’s dissertations.
The article describes general principles of production of the mineral-based fine powder «Microdur» and its applications in underground excavation and geotechnical engineering. As compared to other types of microcement, it has special mineral composition and grain size distribution. The maximum grain diameter is 6 μm («X» type), 9,5 μm («U» type), 16 μm («F» type). Microdur-based aqueous slurries with water/binder ratio of 2.0 äî 6.0 are characterized by high sedimentation resistance, enhanced capability to penetrate into porous and fractured materials thus improving their strength and density. Therefore, Microdur may be successfully used for both well drilling and workover.