Open-Pit Mine Geological Model Construction and Composite Rock Blasting Optimization Research

Table 1

1290 flatbed map.

Stratum position	Stratum name	Stratum thickness (m)	Lithology related characteristics
Upper middle	Powder, fine sandstone	3.00–9.30	Light gray and gray sandstones are mainly dense and hard with a small amount of dark gray, and yellowish-brown fine sandstone.
Middle part	Clay with silt fine sandstone	3.10–5.60	Gray-yellow, gray-white, the medium-density to dense, mainly in the medium-density state, saturated, with silty sand, fine sand interlayer, shaking response, and poor gloss.
Middle and lower part	Moderately weathered argillaceous sandstone	3.49–5.85	Dark red, purple-red, hard to hard, argillaceous structure, thickly layered structure, dense cementation, relatively complete core, and brittle hammering sound.
Very few areas in the lower part	Strongly weathered argillaceous sandstone	1.10–1.60	Purple-red, dense state, loose structure, and the greater degree of weathering.