%0 Journal Article
%T The Impact of Different Mining and Releasing Ratios on the Over-Support Pressure of Header Working Face
%A Huaji Zhang
%J World Journal of Engineering and Technology
%P 526-535
%@ 2331-4249
%D 2023
%I Scientific Research Publishing
%R 10.4236/wjet.2023.113037
%X Through
the theoretical analysis of overburden destabilization mechanism, FLAC 3D
simplified plane numerical simulation method and field measurement method, we
compared the relationship of overburden support pressure <span>at 35</span></span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:&quot;\">m of
workface recovery, </span><span style=\"font-family:&quot;\">and </span><span style=\"font-family:&quot;\">the peak overburden support pressure decreased</span><span style=\"font-family:&quot;\"> from 13.85</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:&quot;\">Mpa to
11.97</span><span style=\"font-family:&quot;\"> </span><span style=\"font-family:&quot;\">Mpa
from 1:1 to 1:3. With the increase of mining ratio, the peak over-supporting
pressure decreases</span><span style=\"font-family:&quot;\">: </span><span style=\"font-family:&quot;\">with the increase of top coal recovery thickness, the peak
over-supporting pressure and the influence range will be further expanded, and
the distance between the peak over-supporting pressure and the coal wall of the
working face will be further increased and the high stress zone of the peak
area will be expanded simultaneously.
%K Different Extraction and Release Ratios
%K Overburden Support Pressure
%K Overburden Destabilization Mechanism
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=126836