Sentence examples for roof strata from inspiring English sources
The term 'roof strata' is correct and can be used in written English when referring to the physical layer of roofing material, such as shingles or tiles, on top of a roof which is protecting the structure beneath it
For example, "New roof strata were required after the intense storm damaged the existing shingles."
The factors affecting the stability of the overburden in solid dense filling mining were also analyzed, including the thickness and elasticity modulus of the main roof strata, overlying strata loads, advanced distance and length of workface, and elastic foundation coefficient of backfill body.
Compared to strata before mining, roof strata collapse or generate fractures due to mining activities, which leads to seismic waves are absorbed when propagating in the strata and seismic wave frequency also decreases.
After 4 months' deposition stable period (Fig. 7d), the seismic frequency of near-surface strata increases significantly compared to that of coal roof strata, which indicates the self-heal capability of near-surface strata is stronger than that of coal roof strata.
The penetration can be deeper for competent roof strata and more level seams.
After early trials about 1920, they were developed in the 1940s for strengthening laminated roof strata in mines.
Caving of roof strata typically occurs immediately behind the face shield supports.
Most of the OSD is associated with mining of immediate roof strata.
Open image in new window Fig. 5 Distribution of damage in the roof strata.
Furthermore, the settlement of the roof strata was small and no disaster occurred.
The roof strata satisfying the ∆ j − ∆ m ≤ 0 condition are defined as immediate roof while the roof strata satisfying the ∆ j − ∆ m > 0 condition are defined as upper roof.
The scope of the tributary area method ends with high percentage of extraction and roof strata failure.
