Table 1 Simulation parameters for native rock and similar materials.
From: Physical simulation study on grouting water plugging of flexible isolation layer in coal seam mining
Rock lithology | Native rock | Similar material | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
Elastic modulus (GPa) | Cohesion (MPa) | Strata thickness (m) | Cohesion (MPa) | Elastic modulus (MPa) | Strata thickness (mm) | Block material elastic modulus (GPa) | Cementing materials cohesion (MPa) | Block material ratio | Cementing materials ratio (Sand:gypsum:white powder:water) | |
Naoro Formation lower section | ||||||||||
Gritstone | 45.7 | 3.96 | 12.7 | 24.76 | 285.7 | 95.6 | 284.3 | 25.99 | Cement:latex:sand = 1:0.1:4 | 4:2:1.5:2 |
Siltstone | 44.4 | 1.94 | 10.6 | 12.14 | 277.4 | 79.6 | 278.1 | 12.88 | Cement: JS polymer compound = 1.2:1 | 1:2:1:1 |
Gritstone | 45.7 | 2.82 | 10.1 | 17.65 | 285.7 | 76.6 | 284.3 | 17.27 | Cement: latex:sand = 1:0.1:4 | 2:2:1.5:1.5 |
Yan'an Formation | ||||||||||
Medium grained sandstone | 59.5 | 3.42 | 2.2 | 21.37 | 371.7 | 16.6 | 365.3 | 20.80 | Cement:latex:sand = 1:0.5:2 | 2:2.5:1.5:1.5 |
Siltstone | 40.0 | 4.30 | 1.7 | 26.85 | 250.0 | 12.6 | 254.2 | 24.60 | Cement:latex:sand = 1:0.2:3 | 4:2:1:1.5 |
Mudstone | 10.5 | 0.41 | 0.8 | 2.56 | 65.5 | 6 | 54.6 | 3.84 | Cement: JS polymer compound = 1.0:1 | 3:2:1:1 |
Siltstone | 42.2 | 2.40 | 0.4 | 15.00 | 263.8 | 3 | 254.2 | 14.50 | Cement:latex:sand = 1:0.2:3 | 2:1.5:1.5:1.5 |
No.2 Coal seam | 3.3 | 0.84 | 0.2 | 5.24 | 20.8 | 1.5 | 17.9 | 6.90 | Nail free adhesive | 1:1:1:1 |
