Workers use cut granite to make arched doors for cave dwellings

Описание: In cave dwellings, workers use cut granite (compressive strength 150 MPa, 50-100 mm thick) to create arched doors (spans 1.5-2 m), enhancing the structural aesthetics and stability. Using a diamond saw (5 kW, 3000 rpm) and templates, cutting tolerances are less than 1 mm, with surface roughness Ra less than 1.0 μm. Integrating traditional stone masonry techniques with CNC cutting improves construction efficiency by 40%. From an architectural perspective, this process enhances the compressive strength of door openings by 30%, making it suitable for traditional cave dwellings and cultural buildings while reducing maintenance costs by 20%. However, stone splicing accuracy and dust control require optimization. The introduction of laser positioning and dust extraction systems can improve both process precision and sustainability.