Coal mine composite roof support and control method
A composite roof and roof support technology, which is applied in mine roof support, mining equipment, earthwork drilling, etc., can solve problems such as roof fall accidents, unreasonable support methods, difficulties in advance support and end support, and achieve The effect of preventing unsafe hidden dangers and safe and efficient production
Inactive Publication Date: 2017-04-05
XINWEN MINING GROUP ZHAI TOWN COAL MINE
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Problems solved by technology
In the process of coal mine production, since the composite roof is directly above the mining coal seam, the composite roof is often pre-excavated when tunneling the roadway, so that the normal coal seam is below the roadway floor, which provides advance support and end support during the mining of the working face. It has brought great difficulties. Some enterprises have tried to support the composite roof construction during the excavation process, but due to unreasonable support methods, large-scale roof fall accidents have occurred many times
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[0017] according to Figure 1-Figure 4 Shown: a kind of coal mine composite roof support and control method of the present invention, comprising: the roof support mode when the thickness of the composite roof of the excavation roadway≤1 meter; the roof support mode when the thickness of the composite roof of the excavation roadway is 1-3 meters; The roof support method when the thickness of the composite roof of the roadway is ≥ 3 meters; the roof support method when there is no delamination within 3 meters above the roof of the excavation roadway, and the rock is hard and stable.
[0018] The specific method is:
[0019] like figure 1 Shown: The roof support method when the thickness of the composite roof of the excavation roadway is ≤1 meter: adopt the "anchor belt net + anchor cable" support method, the roof adopts a metal anchor rod with a diameter of 20mm×length 2000mm, and the shoulder socket adopts a diameter of 20mm×length 2200mm Metal bolts with a length of 2.0 mete...
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Abstract
The invention relates to a coal mine composite roof support and control method. The coal mine composite roof support and control method comprises a roof support mode when the thickness of a driving tunnel composite roof is smaller than or equal to 1 m; a roof support mode when the thickness of the driving tunnel composite roof ranges from 1 m to 3m; a roof support mode when the thickness of the driving tunnel composite roof is larger than or equal to 3m; and a roof support mode when no layering exists within a 3 m scope above the driving tunnel roof, and rocks are hard and stable. The coal mine composite roof support and control method is advantaged in that safe and efficient production on the composite roof working face can be achieved, potential risks brought by roof leakage of the coal working face machine channel roof can be effectively prevented, the normal advance speed of the working face can be prevented from being affected, construction of the driving tunnel under the composite roof can be achieved, advance support and end support problems generated due to construction on the coal working face through destroying the composite roof are solved, and a foundation is laid for high-yield high-efficiency production on the composite roof working face.
Description
technical field [0001] The invention relates to a composite roof control method, in particular to a coal mine composite roof support and control method. Background technique [0002] Composite roof, also known as detached roof, is essentially a direct roof with a special combination of one or more layers of soft rock and hard rock. It is easy to separate from the upper hard rock layer, especially when it is affected by factors such as mine pressure, geological structure, and water, it is more likely to cause separation and roof fall, and the roof is unstable and difficult to control. The composite roof has always been one of the main factors restricting the mining efficiency, production capacity and safety status of coal enterprises. In the process of coal mine production, since the composite roof is directly above the mining coal seam, the composite roof is often pre-excavated when tunneling the roadway, so that the normal coal seam is below the roadway floor, which provid...
Claims
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Login to View More IPC IPC(8): E21D23/00
CPCE21D23/0047
Inventor 崔树彬郑永胜卢鑫高德波高坤梁光录刘学麟
Owner XINWEN MINING GROUP ZHAI TOWN COAL MINE