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Types and Characteristics of Roof Accidents
Release time:
2023-01-10
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Types and Characteristics of Roof Accidents
According to the range of roof falling at one time and the number of casualties, common roof accidents can be divided into local roof falling.Accidents and large area cutting top accident two categories.
1. Local roof fall accident
Local roof caving in coal mining face is easy to occur in caving line, coal wall line, upper and lower outlets of working face and groundThe area of structural change.
Local roof caving in the tunneling face is easy to occur in the empty roof operation site of the tunneling face and the support of the wooden shed.Roadway, inclined roadway, rock roadway, coal roadway opening, geological structure change zone and driving roadway workFace through the old lane and so on.
2. Large area roof cutting accident
The cause of the large area cutting top accident (referred to as the collapse surface) is caused by the large area movement of the direct top and the basic top.The collapse accident caused by the direct top movement, according to the nature of the force and the initial direction of the top plate movement.Different, can be divided into the following two categories:
(1) Pushing collapse type accident.
(2) Crash type accident.
The collapse accident caused by the basic roof movement is different according to the nature of the force and the starting direction of the roof movement,It can also be divided into the following two categories:
(1) Impact and collapse type (I. e. smashing type) accidents.
(2) Crush accident
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