Grouting system for seepage prevention of ore heap side slope

Abstract

The utility model provides a grouting system for seepage prevention of an ore heap side slope, a plurality of grouting pipes are connected through connecting pipes, a tie bar is arranged between any two adjacent grouting pipes, and the length of the tie bar is matched with the slurry seepage range of the grouting pipes; a plurality of transverse grouting mechanisms are arranged on the grouting pipe, the multiple sets of transverse grouting mechanisms are evenly distributed in the length direction of the grouting pipe, and each set of transverse grouting mechanism comprises branch pipes extending towards the two sides of the grouting pipe. The transverse grouting mechanism is arranged on the grouting pipe, multiple sets of transverse branch pipes are arranged on the grouting pipe, the grouting pipe is connected with the main grouting pipe through the cross joint, multi-direction uniform diffusion of grout is achieved, the vertical grouting and the transverse grouting achieve the synergistic effect, an original ore heap and a newly-stacked seepage interception dam can be solidified, and therefore the stability of a side slope is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mine tailings seepage prevention and repair, and particularly relates to a grouting system for preventing seepage of a mine heap slope. BACKGROUND

[0002] In the process of mineral exploitation, the stability of the mine heap slope directly affects production safety and the ecological environment. The existing mine heap is usually designed with a seepage interception dam for seepage prevention, and the seepage prevention structure of the seepage interception dam is mostly a seepage prevention geomembrane. The seepage interception dam is generally constructed gradually with the accumulation of tailings. During the accumulation process, the seepage prevention geomembrane is subjected to soil pressure and is pulled and stretched. The joint of the seepage prevention geomembrane is prone to have a problem of poor sealing, resulting in an unsatisfactory seepage prevention effect. Since the seepage prevention geomembrane needs to be laid in combination with the construction progress of the seepage interception dam, it is difficult to maintain the seepage prevention geomembrane after it is laid, so that the seepage interception dam is difficult to repair when it seeps.

[0003] Therefore, it is necessary to provide an improved technical solution for the above-mentioned deficiencies of the prior art. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at overcoming the deficiencies of the prior art, and provides a grouting system for preventing seepage of a mine heap slope.

[0005] In order to achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A grouting system for preventing seepage of a mine heap slope comprises:

[0007] A plurality of grouting pipes are connected through connecting pipes, and a tensile bar is arranged between any two adjacent grouting pipes, the length of the tensile bar being matched with the slurry permeation range of the grouting pipe.

[0008] A plurality of transverse grouting mechanisms are arranged on the grouting pipe, and a plurality of groups of the transverse grouting mechanisms are uniformly distributed along the length direction of the grouting pipe, each group of the transverse grouting mechanisms comprising branch pipes extending to both sides of the grouting pipe.

[0009] Preferably, the transverse grouting mechanism further comprises a cross joint, the grouting pipe comprises a plurality of sections, any two adjacent sections of the grouting pipe are connected through the cross joint, and the two branch pipes are respectively assembled on both sides of the cross joint.

[0010] Preferably, the end of the branch pipe is a closed conical structure.

[0011] Preferably, the diameter of the branch pipe is not greater than that of the grouting pipe, and a grout outlet hole is arranged on the branch pipe.

[0012] Preferably, one end of the connecting pipe is a closed end, the other end is connected to a grouting pump, and a plurality of connecting heads corresponding to the grouting pipes are arranged on the connecting pipe.

[0013] Beneficial effects: The grouting pipe is provided with a transverse grouting mechanism, a plurality of groups of transverse branch pipes are arranged on the grouting pipe, and the transverse branch pipes are connected with the main grouting pipe through cross joints, so that the slurry is uniformly diffused in multiple directions, the vertical and transverse grouting are cooperated, the original mine heap and the newly accumulated seepage cutoff dam can be consolidated, and the stability of the slope is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0014] The drawings accompanying the specification of this application form a part of this application and serve to further provide a further understanding of the present application, the illustrative embodiments of the present application and its description serve to explain the present application, and do not constitute an improper limitation on the present application. Among them:

[0015] Fig. 1 The structure diagram of the grouting system in the specific embodiment provided by the present application is shown in the figure;

[0016] Fig. 2 The consolidation schematic diagram of the water curtain in the specific embodiment provided by the present application is shown in the figure;

[0017] Fig. 3 The installation schematic diagram of the conical sleeve in the specific embodiment provided by the present application is shown in the figure.

[0018] In the figure: 1, connecting pipe; 2, connecting head; 3, grouting pipe; 4, cross joint; 5, branch pipe; 6, grouting hole; 7, tie bar; 8, connecting plate; 9, grouting pump; 10, water curtain; 11, newly accumulated seepage cutoff dam; 12, original mine heap; 13, conical sleeve; 14, strip-shaped gap. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art belong to the scope of protection of the present application.

[0020] In the description of the present application, the orientation or position relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom" and the like is the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and does not require the present application to be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the present application. The terms "connected", "connected" used in the present application should be understood in a broad sense, for example, it can be fixed connection, or detachable connection; it can be directly connected, or indirectly connected through an intermediate part. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0021] The utility model will be explained in detail below with reference to the drawings and in combination with the embodiments. It should be noted that the embodiments in the utility model and the features in the embodiments can be combined with each other without conflict.

[0022] As Figs. 1-3 The grouting system for preventing seepage of the mine heap slope mainly is used for repairing when the seepage dam seeps, and specifically, the original mine heap 12 of the seepage dam is excavated by the excavator, the excavation face is formed after the excavation is completed, the grouting system is arranged behind the excavation face, the new seepage dam is formed by piling up the raw soil, cement soil and the like at the excavation face, and then the grouting pipe 3 is grouted to form the waterproof curtain 10.

[0023] The grouting system comprises the grouting pipe 3 and the transverse grouting mechanism, the grouting pipe 3 is multiple, the multiple grouting pipes 3 are connected through the connecting pipe 1, the connecting pipe 1 is used for connecting the grouting pump 9, so that the grouting pipe 3 can be pumped into the grout, so that the original mine heap 12 and the newly butt-jointed mine heap are consolidated, the drawbar 7 is arranged between any two adjacent grouting pipes 3, the length of the drawbar 7 is matched with the grout permeation range of the grouting pipe 3, the grouting ranges of the grouting pipes 3 are intersected by using grouting, the waterproof curtain 10 is formed, the grouting pipes 3 are connected into an integrated whole through the drawbar 7, the strength of the waterproof curtain 10 is improved, in order to ensure the consolidation stability of the newly piled seepage dam 11 and the original mine heap 12, multiple transverse grouting mechanisms are arranged on the grouting pipe 3 in the application, the transverse grouting mechanisms extend to the newly piled seepage dam 11 and the original mine heap 12 respectively and then grout, so that the consolidation capacity and range are improved, the multiple groups of transverse grouting mechanisms are distributed along the length direction of the grouting pipe 3, each group of transverse grouting mechanisms comprises the branch pipe 5 extending to the two sides of the grouting pipe 3, the diameter of the branch pipe 5 is less than or equal to the grouting pipe 3, the branch pipe 5 is provided with the grout outlet hole, and the end of the branch pipe 5 is a closed conical structure. Generally, after the original mine heap 12 is excavated, the branch pipe 5 is inserted into the corresponding excavation slope face through external force, and then the new seepage dam is piled up, so that the seepage dam and the original mine heap 12 are engaged together through the transverse grouting mechanism.

[0024] In the embodiment, the grouting pipe 3 is made of steel, and the spacing between the two adjacent grouting pipes 3 is matched with the grouting permeation range of the grouting pipe 3.

[0025] According to the actual situation on site, the curtain thickness should be 1 m in the preliminary design. The spacing (L) of the grouting pipe 3 and the grout diffusion radius (R) are related as follows under the condition that the grouting pipe 3 grouting grout diffusion radius and mutual connection:

[0026] L = 2Rgcosα

[0027] In order to maximize the single-hole curtain water plugging effect, the intersection angle (a) is generally selected as about 45°, and in this case, the relationship among the spacing (L), the curtain thickness (H) and the slurry diffusion radius (R) is as follows:

[0028] L = H = 2Rsin45° = 1.414R

[0029] Therefore, according to the above analysis and calculation, the curtain thickness is 1 m, and the slurry diffusion radius is 0.71 m. According to the slurry diffusion radius and in combination with the actual situation on site, the injection holes 6 are arranged on the branch pipes 5 and the grouting pipes 3, and the spacing of the injection holes 6 is set as 150-450 mm.

[0030] The water-cement ratio of the slurry is 0.7-1 (which can be adjusted according to the diffusion degree on site), the designed final-hole grouting pressure is 2 MPa, in order to enhance the fluidity of the cement, enhance the bonding strength of the cement, ensure the stability of the slurry, increase the quality of the cement by 10%-20%, and according to the gushing water during the drilling construction, the injection can add the accelerator by 2%-10% of the quality of the cement, and the cement strength is not less than C30.

[0031] In an optional embodiment, a plurality of connecting plates 8 corresponding to the reinforcing bars 7 are arranged on the outer wall of the grouting pipe 3, the reinforcing bars 7 can be thin steel bars or steel cables, and the two ends are detachably connected to the connecting plates 8 between the adjacent two grouting pipes 3, and not less than three reinforcing bars 7 are arranged on the grouting pipe 3 in the axial direction.

[0032] In an optional embodiment, the transverse grouting mechanism further comprises a cross joint 4, the grouting pipe 3 comprises a plurality of sections, and any two adjacent sections of the grouting pipe 3 are connected through the cross joint 4, the two sections of the cross joint 4 are connected to the adjacent two sections of the grouting pipe 3 in the form of threaded connection, and the two branch pipes 5 are respectively assembled on the two interfaces on the two sides of the cross joint 4, so that the length of the grouting pipe 3 can be adjusted according to the actual demand.

[0033] The grouting pipe 3 is in multiple sections, and each section of the grouting pipe 3 corresponds to a reinforcing bar 7. One end of the connecting pipe 1 is a closed end, and the other end corresponds to the connection of the grouting pump 9. A plurality of connecting heads 2 corresponding to the grouting pipes 3 are arranged on the connecting pipe 1, a pressure pump corresponding to each grouting pipe 3 is arranged on the connecting head 2, a control valve is arranged on the connecting head 2, and the grouting can be synchronous or independent.

[0034] In an optional embodiment, the newly accumulated seepage control dam 11 is accumulated by cement soil or plain soil, and is accumulated in layers, a geogrid is arranged between the adjacent two layers, a 45-degree slope surface is arranged outside the newly accumulated seepage control dam, and a shotcrete layer is sprayed, the shotcrete layer is provided with a drainage hole, and the drainage hole is used for draining the seepage water inside the seepage control dam.

[0035] In actual use, the branch pipe 5 on one side of the grouting pipe (the side of the original mine heap 12) is set by applying pressure to the original mine heap 12 through a pressure device or a pile driving device. In order to reduce the difficulty of setting, the bottom of the grouting pipe is provided with a tapered bottom. Further, in order to avoid the soil in the original mine heap 12 from blocking the grouting hole 6 during the setting process, a tapered sleeve 13 corresponding to each group of grouting holes 6 (each group of grouting holes 6 includes 3-4 grouting holes 6 uniformly distributed in the circumferential direction of the branch pipe 5, and there are not less than two groups of grouting holes 6 in the length direction of the branch pipe 5) is arranged on the outer wall of the branch pipe 5. The smaller end of the tapered sleeve 13 is welded to the lower edge of the grouting hole 6 by welding, and the larger end extends upward to block the grouting hole 6, so as to prevent soil from entering the grouting pipe 6. Further, a plurality of strip-shaped notches 14 extending along the tapered sleeve 13 are arranged on the tapered sleeve 13. When the grouting pipe 6 is four, the strip-shaped notches 14 are four, and are staggered with the grouting holes. Thus, under the premise of blocking the grouting hole 6, the direction of the slurry flow is improved, and the formation of the waterproof curtain is ensured.

[0036] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application is within the scope of protection of the claims of the present application.

Claims

1. A grouting system for preventing seepage of a mine heap slope, characterized by, The application relates to a slurry injection pipe and a slurry injection mechanism. The slurry injection pipe is connected by connecting pipes, and a reinforcing bar is arranged between any two adjacent slurry injection pipes; the length of the reinforcing bar is matched with the slurry permeation range of the slurry injection pipe. The slurry injection pipe is provided with a plurality of transverse slurry injection mechanisms, and a plurality of groups of the transverse slurry injection mechanisms are distributed along the length direction of the slurry injection pipe; each group of the transverse slurry injection mechanisms comprises branch pipes extending to both sides of the slurry injection pipe.

2. The grouting system for preventing seepage of a mine heap slope according to claim 1, characterized in that, The transverse slurry injection mechanism further comprises a cross joint, the slurry injection pipe comprises a plurality of sections, any two adjacent sections of the slurry injection pipe are connected by the cross joint, and the two branch pipes are respectively assembled on both sides of the cross joint.

3. The system for the anti-seepage grouting of the heap slope according to claim 2, characterized in that, The end of the branch pipe is a closed conical structure.

4. The system for the anti-seepage grouting of the heap slope according to claim 3, characterized in that, The diameter of the branch pipe is not larger than that of the slurry injection pipe, and the branch pipe is provided with a slurry outlet hole.

5. The system for the anti-seepage grouting of the mine heap slope according to claim 1, characterized in that, One end of the connecting pipe is a closed end, and the other end is connected with a slurry injection pump; the connecting pipe is provided with a plurality of connecting heads corresponding to the slurry injection pipes.

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