A coal mine roadway geotechnical reinforcement anti-slump hole drill bit
A technology for coal mine tunnels and anti-slump holes, which is applied to drill bits, earthwork drilling, drilling equipment, etc., can solve problems such as hidden dangers of coal mine safety production, waste of drill bits, and inability to remove drill bits and drill pipes.
Active Publication Date: 2017-01-04
TIANDI SCI & TECH CO LTD +1
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Problems solved by technology
[0006] The technical problem to be solved by the present invention is: in order to solve the problem that the drill bit and the drill pipe cannot be taken out after the existing coal seam drilling hole collapses, the drill bit is seriously wasted; Big security issue
Method used
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Embodiment Construction
[0018] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0019] Such as figure 1 As shown, a kind of colliery roadway geotechnical reinforcement anti-collapse hole drill bit of the present invention comprises front drill bit 1 and rear drill bit 2, and front drill bit 1 and rear drill bit 2 are coaxial but set on the back, promptly both drill bit directions are all outward, so The present invention can respectively drill holes forward or backward along with the rotation of the drill rod, can drill holes forward, and can also clean up the collapsed rock and soil when retreating, so that the drill bit and the drill rod are withdrawn; the diameter of the front drill bit 1 is greater than The diameter of the rear drill bit 2 enable...
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The invention belongs to the field of rock and soil reinforcement of coal mine roadways, and discloses an anti-slump hole drill bit for rock and soil reinforcement of coal mine roadways, comprising a front drill bit and a rear drill bit arranged coaxially, the front drill bit and the rear drill bit are arranged away from each other, and the diameter of the rear drill bit is It is smaller than the diameter of the front drill bit; the rear drill bit is provided with a drill rod installation hole, and the drill rod installation hole is coaxially arranged with the rear drill bit. By connecting the rear drill bit in the opposite direction at the tail of the front drill bit, the coal rock mass after the collapsed hole can be cleaned by the rear drill bit when the rod is withdrawn, so that the drill bit and the drill pipe can be withdrawn easily; the diameter of the rear drill bit is smaller than that of the front drill bit. , to facilitate the smooth discharge of the rock and soil drilled by the front bit.
Description
technical field [0001] The invention relates to the technical field of coal mine roadway rock and soil reinforcement, in particular to a coal mine roadway rock and soil reinforcement anti-collapse hole drill bit. Background technique [0002] The roadway surrounding rocks in coal mines are mainly sedimentary rocks, and the strength of sedimentary rocks is low, and the coal rock mass is subject to multiple influences such as ground stress and mining, which will lead to the development of coal rock mass cracks and the coal rock mass fragmentation. The grouting reinforcement construction is the main means of repairing broken roadways, and it is widely used in the field of geotechnical engineering in my country, especially for coal mine roadways. The grouting reinforcement construction has become the main means of repairing complex and difficult roadways in coal mines. [0003] The grouting reinforcement construction is mainly to set the grouting borehole in the coal rock mass a...
Claims
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IPC IPC(8): E21B10/00
Inventor 李文洲吴拥政王艳军李洪涛籍志强董飞
Owner TIANDI SCI & TECH CO LTD