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Bearing pressure on the upper and lower sides of the coal face and near the original cut
Release time:
2022-12-14
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Bearing pressure on the upper and lower sides of the coal face and near the original cut
On the coal body near the original cut along the slope up and down of the long wall working face and behind the working face, the same can be
Formation of bearing pressure. It does not advance with the coal face.
Significant changes occur, so it is also called fixed bearing pressure. solid
The distribution form of the fixed support pressure is compared with the moving support pressure,
The peak value is far into the coal body, and the influence range is relatively large.
Small. In addition, the upper bearing pressure compared to the lower, the upper
The range of influence is slightly larger than below.
The original cut above and below the working face and the rear of the working face is attached.
The fixed bearing pressure on the near coal body is the goaf of the working face.
The components of the surrounding bearing pressure are distributed in the form
Fig.
1 Front support pressure of a working face; 2, 3, 4
Upper and lower and rear support pressure of working face
Figure 3-4 Distribution of Supporting Pressure around Goaf
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