A Preliminary Study on the Design Method for Large-Diameter Deep-Hole Presplit Blasting and Its Vibration-Isolation Effect

Table 1

Stratigraphic column through cast-blasting benches.

Stratigraphic order	Lithology	Lithological column	Depth (m)	Thickness (m)	Unit weight (Mg/m^3)	Uniaxial compressive strength (MPa)
10	Siltstone		91.6	5.4	2.4	43.4
11	Packsand		93.6	2.0	2.5	53.4
12	Mudstone		94.6	1.0	2.6	44.2
13	Siltstone		97.4	2.8	2.4	43.4
14	Packsand		101.8	4.4	2.5	53.4
15	Coarse sandstone		114.6	12.8	2.2	28.8
16	No. 5 coal seam		116.2	1.6	1.4	14.7
17	Sandy mudstone		120.7	4.5	2.5	47.7
18	Coarse sandstone		128.2	7.5	2.2	28.8