front abutment pressure

front abutment pressure

[¦frənt ə′bət·mənt ‚presh·ər]
(geophysics)
The release of energy in the superincumbent strata above the seam induced by the extraction of the seam.
References in periodicals archive ?
We can see from Figure 4 that when the distance between the working face and the fault reduces from 90 m to 40 m, due to the cutting action of fault, stress concentration degree in front of the coal wall is high and the front abutment pressure peak increased gradually from 25.
When the distance between the working face and fault decreases from 40 m to 10 m, the bearing capacity of the coal pillar decreases, and the front abutment pressure gradually decreases, and the stress transfers to the high-located strata, which have a strong bearing capacity.
Figure 6 shows that when the distance between the working face and the fault is reduced from 90 m to 30 m, the front abutment pressure peak gradually increased from 26.