Mine filling slurry conveying pipe and method for preventing vertical filling drilling from being scrapped

Abstract

The present invention discloses a filling slurry conveying pipe for use in mines and a method for preventing the scrapping of vertical filling drilling holes. The filling slurry conveying pipe includes a vertical pipe, a transition pipe, a reducer pipe, and a horizontal main pipe. The small end of the reducer pipe is connected to the horizontal main pipe, and the large end is connected to the transition pipe. The transition pipe is connected to the side wall of the vertical pipe. The vertical pipe has a detachable closed bottom end, which is used to open the bottom end of the vertical pipe in the event of an accident to empty the slurry in the vertical pipe. The method for preventing the scrapping of vertical filling drilling holes is to use blasting to dismantle the closed bottom end of the vertical pipe when a pipe blockage occurs, thereby releasing the filling slurry in the vertical main pipe; after the filling slurry is emptied and the pipeline is cleared, the bottom end of the vertical pipe is sealed. This can effectively prevent the slurry in the vertical pipe from solidifying and thus causing the scrapping of the vertical filling drilling hole, a permanent project.

Description

Technical Field

[0001] The present invention relates to the technical field of mine filling, in particular to a filling slurry conveying pipe for mines. Background Art

[0002] When filling operations are carried out in mines, it is often necessary to transport filling slurry from the surface to the underground through filling slurry conveying pipes. Among them, vertical filling boreholes are called permanent projects and need to be protected to prevent them from being scrapped. The existing filling slurry conveying pipe structure is composed of a large diameter vertical pipe, a bend pipe, a reducer pipe, and a horizontal main pipe connected in sequence. Figure 1 , where the elbow is connected to the bottom end of the vertical pipe. This type of filling slurry conveying pipe is prone to blockage accidents at two locations: the elbow and the reducer. Once a blockage occurs, the pipe must be dismantled starting from the end of the horizontal pipe to prevent the slurry from staying in the pipe for a long time and solidifying. The longer the horizontal main pipe, the greater the risk of the filling slurry staying in the vertical pipe or even solidifying. Once the slurry in the vertical pipe solidifies, the filling borehole will be scrapped, especially the scrapping of the vertical filling borehole, which will cause huge economic losses and seriously affect the production schedule of the mine. Therefore, how to avoid the risk of filling slurry solidifying in the vertical pipe is an urgent problem to be solved. Summary of the Invention

[0003] The object of the present invention is to provide a mine filling slurry conveying pipe and method thereof for preventing the filling drill hole from being scrapped.

[0004] The filling slurry conveying pipe for mines provided by the present invention includes a vertical pipe, a transition pipe, a reducer pipe, and a horizontal main pipe. The small end of the reducer pipe is connected to the horizontal main pipe, and the large end is connected to the transition pipe. The transition pipe is connected to the side wall of the vertical pipe. The vertical pipe has a detachable closed bottom end, which is used to open the bottom end of the vertical pipe in the event of an accident to release the slurry in the vertical pipe.

[0005] As a preferred embodiment, the transition pipe includes a section of transition inclined pipe and a section of transition horizontal pipe connected to each other, wherein the transition inclined pipe is connected to the side wall of the vertical pipe, and the transition horizontal pipe is connected to the large end of the reducer.

[0006] Preferably, the vertical pipe comprises a vertical main pipe and a short pipe. The short pipe is connected to the lower end of the vertical main pipe and has a closed bottom end, which serves as the closed bottom end of the vertical pipe. The transitional inclined pipe is connected to the side wall of the vertical main pipe. The short pipe is connected to the vertical main pipe via a flange. The short pipe is sealed with a steel plate.

[0007] Preferably, the downward angle between the transition inclined pipe and the vertical pipe is 40-50 degrees. The length of the transition inclined pipe and the horizontal transition pipe is about 1 meter.

[0008] The method for preventing vertical filling boreholes from being scrapped using the above-mentioned mine filling slurry delivery pipe of the present invention comprises the following steps:

[0009] (1) When pipe blockage occurs, the closed bottom end of the vertical pipe is demolished by blasting to release the filling slurry in the vertical main pipe;

[0010] (2) After the filling slurry is drained and the pipeline is cleared, the bottom end of the vertical pipe is sealed.

[0011] Preferably, after the filling slurry in step (2) is drained, the short pipe is replaced.

[0012] Since the present invention provides a detachable closed bottom end for the vertical pipe and arranges the transition pipe on the side wall of the vertical pipe, when a blockage accident occurs in the transition pipe or the horizontal main pipe, the closed bottom end of the vertical pipe can be immediately blasted open to discharge the slurry in the vertical pipe, and the bottom end of the vertical pipe can be closed again after the fault is eliminated. In this way, the possibility of the vertical pipe being blocked is effectively and quickly eliminated, and the filling drilling, a permanent project, is protected. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural diagram of the prior art.

[0014] Figure 2 It is a structural schematic diagram of the filling slurry conveying pipe of the present invention.

[0015] Vertical pipe 1, closed bottom end 11, vertical main pipe 12, short pipe 13; transition pipe 2, transition inclined pipe 21, transition horizontal pipe 22; reducer 3, horizontal main pipe 4 DETAILED DESCRIPTION

[0016] Implementation method one:

[0017] from Figure 2 It can be seen that the filling slurry conveying pipe of the present invention still includes a vertical pipe 1, a transition pipe 2, a reducer 3, and a horizontal main pipe 4, wherein the vertical pipe 1 has a detachable closed bottom end 11, the transition pipe 2 is connected to the side of the vertical pipe 1, the large end of the reducer 3 is connected to the transition pipe 2, and the small end is connected to the horizontal main pipe 4.

[0018] In the present implementation method of the filling slurry conveying pipe, when the filling slurry blocks the pipe, the accident is first judged. If the fault cannot be eliminated in a short time, and there is a fear that the slurry in the vertical pipe 1 will solidify over time, the closed bottom end 11 of the vertical pipe 1 is blasted open to release the slurry therein, thereby preventing the slurry from solidifying in the vertical pipe 1 and effectively protecting the filling vertical borehole.

[0019] Implementation method 2:

[0020] from Figure 2It can be seen that the design of the vertical pipe 1 in this embodiment is different from that in the first embodiment, and the transition pipe 2 is also designed differently.

[0021] Vertical pipe 1: In this embodiment, the vertical pipe 1 includes a vertical main pipe 12 and a short pipe 13. The closed bottom end 11 is welded to the bottom of the short pipe 13 with a steel plate, and the short pipe 13 is connected to the vertical main pipe 12 through a flange 14. When the slurry is blocked in the pipe and the slurry in the vertical pipe 1 must be released immediately, the closed bottom end is still blasted to drain the slurry. Then the short pipe 13 can be removed and replaced with a new short pipe 13. The closed bottom end 11 can be welded to the short pipe 14 with a steel plate in advance, which is much more convenient and quick. It should be noted that the blasting force should be controlled and care should be taken not to damage the vertical main pipe above the short pipe 13. After the slurry in the vertical pipe 1 is released, it can be replaced together with the short pipe according to the damage caused by the blasting and then welded with a steel plate to form a closed bottom end. Then, flushing or processing of other pipelines can be carried out.

[0022] Transition pipe 2: Utilizing a "straight instead of curved" design, it is formed by connecting a transition slant pipe 21 and a horizontal transition pipe 22. Both transition slant pipes 21 and 22 are approximately one meter long straight pipes. The transition slant pipe 21 is welded to the side of the vertical main pipe 12 at an angle, preferably between 40° and 50°, with a typical angle of approximately 45° being sufficient. The transition slant pipe 21 can also be connected using two short pipe sections connected by high-pressure flanges, facilitating processing, installation, and disassembly for maintenance. One end of the horizontal transition pipe 22 is connected to the transition slant pipe 21, and the other end is connected to the large end of the reducer pipe 3. The small end of the reducer pipe 3 is connected to the horizontal main pipe 4. This design significantly increases its equivalent turning radius and is easy to process and manufacture on-site. After being buffered by the horizontal transition pipe, the reducer pipe reduces the risk of slurry blockage. This embodiment utilizes two short straight pipe sections to replace the traditional vertical curved pipe, significantly increasing its equivalent turning radius and reducing the flow resistance of the slurry and the frequency of slurry blockages.

Claims

1. A method for preventing vertical filling drilling from being scrapped by a filling slurry delivery pipe for a mine, characterized by: The conveying pipe used in the method includes a vertical pipe, a transition pipe, a reducer pipe, and a horizontal main pipe. The small end of the reducer pipe is connected to the horizontal main pipe, and the large end is connected to the transition pipe. The transition pipe is connected to the side wall of the vertical pipe. The vertical pipe has a detachable closed bottom end, which is used to open the bottom end of the vertical pipe in the event of an accident to unload the slurry in the vertical pipe. The transition pipe includes a section of mutually connected transition inclined pipe and a section of transition horizontal pipe, wherein the transition inclined pipe is connected to the side wall of the vertical pipe, and the transition horizontal pipe is connected to the large end of the reducer pipe; the vertical pipe includes a section of vertical main pipe and a section of short pipe, the short pipe is connected to the lower end of the vertical main pipe, the short pipe has a closed bottom end, and the closed bottom end serves as the closed bottom end of the vertical pipe; the transition inclined pipe is connected to the side wall of the vertical main pipe; the short pipe is connected to the vertical main pipe through a flange; The specific steps are as follows: (1) When pipe blockage occurs, the closed bottom end of the vertical pipe is demolished by blasting to release the filling slurry in the vertical main pipe; (2) After the filling slurry is drained and the pipeline is cleared, the bottom end of the vertical pipe is sealed; (3) After the filling slurry is released, replace the short pipe.

2. The method for preventing vertical filling drilling from being scrapped by a filling slurry conveying pipe for mines according to claim 1, characterized in that The short pipe is sealed with a steel plate at the bottom.

3. The method for preventing vertical filling drilling from being scrapped by a filling slurry conveying pipe for mines according to claim 1, characterized in that The downward angle between the transition inclined pipe and the vertical pipe is 40-50 degrees.

4. The method for preventing vertical filling drilling from being scrapped by a filling slurry delivery pipe for mines according to claim 1, characterized in that The length of the transition inclined pipe and the horizontal transition pipe is 1 meter.

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