Study on the Mechanical Relationship among the Backfilling Mining Support, Roof Rock Beam, and Gangue Filling Body in Comprehensive Mechanized Filling Mining Process
Table 2
The lithological characteristics of the strata.
Stratum position
Rock name
Lithology description
Depth (m)
Thickness (m)
Overlying strata
Siltstone
Dark grey; broken locally; uneven cross section and inclined fracture.
105.30
1.17
Sandy mudstone
Dark grey; flat section, small wavy bedding, and inclined fracture.
110.95
5.65
Siltstone
Dark grey; highly-weathered and broken locally; flat section.
114.90
3.95
Sandy mudstone
Dark grey; wavy bedding; vertical fracture.
117.10
2.20
Fine-grained sandstone
Light grey; broken locally; sub angular in shape and medium in sorting.
119.05
1.95
Mudstone
Dark grey; highly-weathered; flat section and inclined fracture.
120.30
1.25
Fine-grained sandstone
Light grey; not weathered; medium sorted; cross bedded, subangular, vertical fracture, and occasionally inclined fracture.
122.65
2.35
Sandy mudstone
Dark grey; flat section; strongly weathered.
123.15
0.50
Coal seam
Coal
Black, massive and fragmentary; glass luster.
124.80
1.65
Mudstone
Dark grey; highly-weathered; flat section; wavy bedding; inclined fracture.
125.05
0.25
Coal
Black, massive and fragmentary; glass luster.
125.66
0.61
Floor stratum
Mudstone
Grey; highly-weathered; wavy bedding; flat section and inclined fracture.
