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Supporting pressure of coal mining face
Release time:
2022-12-14
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Supporting pressure of coal mining face
Bearing pressure
Support pressure is in the rock roadway and in the coal seam mining, the roadway on both sides or mining workThe vertical concentrated stress formed in the coal wall around the surface is higher than the original rock stress. mining activity at the face has destroyedThe stress equilibrium state of the overlying strata caused stress redistribution and formed a stress rise near the working face.high zone and reduced stress zone. The pressure of the roof rock layer on the coal seam in the stress rising area is the support pressure, and the essenceIt is caused by the quality of the overhanging basic roof and its overlying strata above the stress reduction zone.
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