stratification plane

stratification plane

[‚strad·ə·fə′kā·shən ‚plān]
(geology)
A demarcation between two layers of sedimentary rock, often signifying that the layers were deposited under different conditions.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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Since the well will not only cross the stratification plane, but elastically hanging bedrocks and caved in bedrocks in the goaf that also contain gas, calculation of production rate in these bedrocks can be made by the equation for calculating filtration into the well (see Figure 2, b).
This increases permeability of bedrock roof due to creation of stratification planes that act as filtering areas (free surface through which methane can be filtered) and gas "delivery channels" from location of its desorption to the well.
In zone B, stratification planes occur in roof bedrock at a greater distance from developed bedrock, as compared to zone A, and is characterized by smaller size along the wall length, but greater size along the length of extraction column.