Study of roof rock movement depending on the technology of seam excavation
Abstract
The generally accepted method of research of rock pressure manifestations, based on the analysis of average roof displacements at different distances from the face, does not provide an opportunity to assess the condition of the roof and to choose a rational characteristic of the support. According to this methodology, the movement of the roof rocks is conventionally recognized as continuous, and the measured changes in sinking velocities during individual operations are practically not used. Due to the unequal duration of measuring points and different duration of individual operations, not only the character of the roof displacement curve (when moving away from the face) but also the final results are distorted.
References
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