Ключевые слова: access, active, cavern, complex, construction, control, dark, design, elements, energy, engineering, environment, equipment, facility, features, heavy, industrial, infrastructure, innovation, installation, layout, lighting, machinery, maintenance, management, mining, pipes, power, production, research, resources, safety, solutions, space, storage, structural, structure, supplies, surgery, systems, tanks, technology, tunnel, underground, utility, ventilation, wall,