CN217204150U - Be used for prosthetic stake anchor wall combination reinforced structure of mine maintenance road - Google Patents

Abstract

The utility model discloses a pile-anchor wall combined reinforcing structure for repairing mine maintenance roads, which is formed by combining steel rail piles (1), anchor cables (2), anchor rods (3), reinforced concrete plate walls (4) and backfilled plain concrete (7); backfilling plain concrete (7) and a reinforced concrete slab wall (4) are respectively poured on the sliding surface of the mine side slope from inside to outside; the bottom of the reinforced concrete plate wall (4) is provided with a bottom beam (5), and a cross beam (6) is arranged in the reinforced concrete plate wall (4); the anchor cable (2) penetrates through the concrete plate wall (4) and a concrete anchor pier (10) is poured on the outer surface of the concrete plate wall (4); the outer anchor end of the anchor rod is bent and connected with a cross beam in the concrete slab wall; the exposed section of the steel rail pile outside the drilled hole is welded with a bottom beam in the concrete plate wall to form a whole with the concrete plate wall. The damaged mine maintenance road can be quickly repaired, secondary collapse and landslide can be effectively avoided, and safe production of the mine is guaranteed.

Description

Pile-anchor wall combined reinforcing structure for repairing mine road

Technical Field

The utility model belongs to the technical field of open mine side slope support, concretely relates to prosthetic reinforced structure of mine maintenance road.

Background

At present, most strip mines in China adopt an interrupted-continuous mining process, wherein ores are loaded on a working face by an electric shovel, transported to a crushing station by an automobile, crushed by a crusher and transported out of a stope by a belt for a belt conveyor. In order to ensure the normal operation of the crusher belt conveyor, an equipment maintenance road is arranged so that fault maintenance workers and related large-scale mechanical equipment can pass through the equipment maintenance road, and therefore the equipment maintenance road occupies an important position in mine production.

With the progress of mining activities, the height of the strip mine side slope is continuously increased, and the probability of side slope damage is continuously increased. In addition, continuous blasting operation is needed in mining, the mine side slope is always under the action of frequent blasting vibration load, and in addition, the phenomena of collapse, landslide and the like are frequently generated locally due to the influence of the adverse structural surface combination of the rock strata of the side slope. The common treatment measures of the mine side slope mainly include slope cutting load reduction, anchor rod and anchor cable reinforcement, anchor net spraying slope protection, frame beam reinforcement and the like. The single reinforcing mode is prone to failure under the action of complex load stress, so that multiple reinforcing modes are adopted for combined supporting at present, but the problem that the mine repair road cannot pass due to slope collapse and landslide cannot be solved by the conventional combined reinforcing and supporting mode. Therefore, in order to ensure the safe production of mines, a reinforcing mode which can improve the stability of mine side slopes and recover the passing of mine maintenance roads is urgently needed.

Disclosure of Invention

In order to realize the above object of the utility model, the utility model provides a be used for prosthetic stake anchor wall combination reinforcement structure of mine maintenance road with fail safe nature is high, the construction cost is low, construction cycle is short.

For realizing the above purpose of the utility model, the utility model relates to a be used for prosthetic stake anchor wall of mine access road to combine reinforced structure adopts following technical scheme to realize:

the utility model relates to a pile-anchor wall combined reinforcing structure for repairing mine maintenance roads, which is formed by combining steel rail piles, anchor cables, anchor rods, reinforced concrete plate walls and backfilled plain concrete; the steel rail piles are arranged in a row of drilled holes at the bottom of the mine side slope; the anchor rods are arranged in rows in anchor rod mounting holes drilled in the mine side slope sliding surface, the anchor cables are arranged in rows in anchor cable mounting holes drilled in the mine side slope sliding surface, the total row number of the anchor cables and the anchor rods is 4-6, the first row and the third row from top to bottom are the anchor cables, the other rows are the anchor rods, and the reinforcing structure and the mine side slope can be connected into a whole by utilizing the 4-6 rows of the anchor cables and the anchor rods, so that the stability is improved; the backfilling plain concrete and the reinforced concrete slab wall are respectively poured on the sliding surface of the mine side slope from inside to outside, wherein the gradient of the reinforced concrete slab wall is not less than the original designed gradient of the mine side slope, but not more than 1 degree at most; the bottom beam is arranged at the bottom of the reinforced concrete slab wall in the horizontal direction, the cross beams are arranged in the reinforced concrete slab wall in the horizontal direction, the row number of the cross beams is equal to the total row number of the anchor cables and the anchor rods, and the positions of the cross beams correspond to the positions of the anchor cables and the anchor rods; the outer anchor end of the anchor rod is provided with a bend; the anchor cable penetrates through the concrete plate wall and a concrete anchor pier is poured on the outer surface of the concrete plate wall; the outer anchor end of the anchor rod is bent and is connected with a cross beam inside the concrete plate wall in an anchoring mode; the exposed section of the steel rail pile outside the drilled hole is welded and fixed with the bottom beam in the concrete plate wall to form a whole with the concrete plate wall, and the shear strength of the reinforced structure and the bearing capacity of the reinforced structure to upper load can be effectively improved by using the steel rail pile.

Through a large number of experimental researches, calculations and experimental verifications, the horizontal distance between adjacent anchor cables in the same row is 3-4 m, the horizontal distance between adjacent anchor rods in the same row is 3-4 m, and the distance between adjacent steel rail piles is 3-4 m; the thickness of the reinforced concrete plate wall is 60-80 cm.

The gradient of the reinforced concrete slab wall is equal to the original design gradient of the mine side slope.

The utility model relates to a be used for prosthetic stake anchor wall of mine access road to combine to reinforce structure adopts above technical scheme after, has following positive effect: through the combined reinforcing structure, the restoration of the maintenance road can be rapidly and effectively realized, and the safety production of mines is guaranteed. The single anchor cable and anchor rod reinforcing mode is connected with the cross beam in the concrete slab wall in an anchoring mode, so that the overall stability of the reinforcing structure can be improved; through the anchoring connection of the steel rail piles and the bottom beam of the concrete plate wall, the shear strength of the whole reinforced structure is effectively improved, the reinforced structure is guaranteed not to slide along the original sliding surface, and meanwhile, the bearing capacity of the whole reinforced structure to the upper moving load is also improved. By using a plurality of rows of anchor cables and anchor rods which penetrate into the bed rock of the side slope and the steel rail piles, the stress state at the potential sliding surface in the side slope can be effectively improved, and the stability of the local area of the side slope is improved; meanwhile, the side slope and the concrete board wall can form an integral area, secondary collapse and landslide can be effectively avoided, and safe production of mines is guaranteed.

Drawings

Fig. 1 is a schematic sectional view of a pile-anchor wall combined reinforcing structure for repairing a mine maintenance road of the present invention;

fig. 2 is a schematic cross-sectional view of a drain hole used in the present invention.

Reference numerals: 1-steel rail pile; 2-anchor cable; 3-anchor rod; 4-reinforced concrete panel wall; 5-a bottom beam; 6-a cross beam; 7-backfilling plain concrete; 8-a drain hole; 9-a drainage ditch; 10-concrete anchor piers; 11-flexible permeable pipe; 12-terylene geotextile.

Detailed Description

For further description the utility model discloses, it is right below with the accompanying drawing the utility model relates to a be used for prosthetic stake anchor wall of mine access road to combine reinforced structure further detailed description.

By figure 1 the utility model relates to a be used for prosthetic stake anchor wall of mine access road to combine reinforced structure section schematic diagram to see out, the utility model relates to a be used for prosthetic stake anchor wall of mine access road to combine reinforced structure to adopt following technical scheme to implement:

1) the method comprises the steps of cleaning pumice at the bottom of a mine side slope of a collapsed landslide, vertically arranging a row of drill holes downwards along the bottom of the mine side slope according to the designed hole depth and the distance of 3-4 m, inserting steel rail piles 1 into the drill holes, filling C20 fine stone concrete into the steel rail piles 1 after the exposed sections of the steel rail piles 1 outside the drill holes are larger than or equal to 30 cm.

2) Drilling 5 rows of anchor rod/anchor cable mounting holes on the sliding surface of the mine side slope, wherein the distance between adjacent anchor rod/anchor cable mounting holes in the same row is 3-4 m, the first row and the third row from top to bottom are anchor cable mounting holes, and the rest are anchor rod mounting holes; one end of the anchor rod 3 is injected into the anchor rod mounting hole, M30 cement mortar is used for grouting and compacting, and the outer anchor end of the anchor rod 3 is bent; one end of the anchor cable 2 extends into the bedrock and is tightly filled with cement slurry; thereby forming an anchor cable-anchor rod arrangement structure on the sliding surface of the mine side slope from top to bottom.

3) Pouring backfill plain concrete 7 and a reinforced concrete plate wall 4 on the sliding surface of the mine side slope from inside to outside respectively, wherein the gradient of the reinforced concrete plate wall 4 is equal to the original design gradient of the mine side slope; the bottom of the reinforced concrete slab wall 4 is provided with a bottom beam 5 in the horizontal direction, cross beams 6 are arranged in the reinforced concrete slab wall 4 in the horizontal direction, the row number of the cross beams 6 is equal to the total row number of the anchor cables 2 and the anchor rods 3, and the positions of the cross beams 6 correspond to the positions of the anchor cables 2 and the anchor rods 3; the reinforced concrete slab wall 4 and the backfilled plain concrete 7 are poured simultaneously, pouring is completed according to the height of a mine step for 3-4 times, and roughening treatment needs to be carried out on the concrete surface of the previous layer when the next layer is poured; through a large amount of experimental research and economic comparison, the thickness of the reinforced concrete slab wall 4 is preferably 60-80 cm.

4) The outer anchor end of the anchor rod 3 is bent by more than or equal to 40 cm; the anchor cable 2 is a prestressed anchor cable, needs to penetrate through the concrete slab wall 4 and be arranged on the concrete slab wall 4, is tensioned after the construction of the reinforced concrete slab wall 4 is completed and reaches a certain strength, and is poured with a concrete anchor pier 10 on the outer surface of the reinforced concrete slab wall 4; the outer anchor end of the anchor rod 3 is bent and welded with a cross beam 6 in the concrete plate wall 4 by adopting a steel bar; the exposed section of the steel rail pile 1 outside the drilled hole is welded with a bottom beam 5 in the concrete plate wall 4 through steel bars and forms a whole with the concrete plate wall 4;

the upper surface of the step of the mine side slope which is reinforced and repaired by the procedures is used as the pavement of the mine maintenance road.

The cross-sectional view of the drainage hole adopted in the practical application of the utility model shown in fig. 2 is combined with fig. 1 to see that a drainage system is also arranged on the step of the mine side slope, the drainage system is composed of drainage holes 8 arranged on the slope surface of the mine side slope and drainage ditches 9 arranged on the slope toe, the drainage holes 8 are synchronously formed when the anchor cable holes and the anchor rod holes are constructed, and the pre-buried PVC pipe passes through the concrete slab wall 4 before the concrete pouring construction; the inside of the drain hole 8 is composed of a soft permeable pipe 11 and a terylene geotextile 12 wrapped on the soft permeable pipe 11; the number of the rows of the drain holes 8 is 2-3. In practical application, the diameter of the soft water permeable pipe 11 is 80mm, and the specification of the terylene geotextile 12 is 300g per square meter; the drainage ditch 9 is a grouted stone drainage ditch, the bottom of the ditch is coated with mortar, and the size of the ditch is 40cm multiplied by 40 cm.

The utility model relates to a be used for prosthetic stake anchor wall of mine access road to combine reinforced structure to carry out experimental application in internal certain large-scale open-air iron ore, certain large-scale non ferrous metal ore deposit. Practical application shows, adopts the utility model discloses the method can be fast restores the mine maintenance road that has destroyed, utilizes rail pile, anchor rope stock to link reinforced concrete siding wall and mine side slope as an organic whole, has high security and wholeness, can effectively avoid the secondary landslide that collapses, and guarantee mine safety in production receives user's high evaluation.

Claims (4)

1. The utility model provides a be used for prosthetic stake anchor wall of mine maintenance road to combine reinforced structure which characterized in that: the steel rail anchor cable is formed by combining a steel rail pile (1), an anchor cable (2), an anchor rod (3), a reinforced concrete plate wall (4) and backfill plain concrete (7); the steel rail piles (1) are arranged in a row of drilled holes at the bottom of the mine slope; the anchor rods (3) are arranged in rows in anchor rod mounting holes drilled on the sliding surface of the mine side slope, the anchor cables (2) are arranged in rows in anchor cable mounting holes drilled on the sliding surface of the mine side slope, the total row number of the anchor cables (2) and the anchor rods (3) is 4-6, the first row and the third row from top to bottom are the anchor cables (2), and the other rows are the anchor rods (3); the backfilling plain concrete (7) and the reinforced concrete slab wall (4) are respectively poured on the sliding surface of the mine side slope from inside to outside, wherein the gradient of the reinforced concrete slab wall (4) is not less than the original design gradient of the mine side slope, but not more than 1 degree at most; a bottom beam (5) is arranged at the bottom of the reinforced concrete slab wall (4) in the horizontal direction, cross beams (6) are arranged in the reinforced concrete slab wall (4) in the horizontal direction, the row number of the cross beams (6) is equal to the total row number of the anchor cables (2) and the anchor rods (3), and the positions of the cross beams (6) correspond to the positions of the anchor cables (2) and the anchor rods (3); the outer anchor end of the anchor rod (3) is provided with a bend; the anchor cable (2) penetrates through the concrete plate wall (4) and a concrete anchor pier (10) is poured on the outer surface of the concrete plate wall (4); the outer anchor end of the anchor rod (3) is bent and is in anchoring connection with a cross beam (6) in the concrete plate wall (4); the exposed section of the steel rail pile (1) outside the drilled hole is welded and fixed with a bottom beam (5) in the concrete plate wall (4) and is integrated with the concrete plate wall (4).

2. The pile-anchor wall combined reinforcing structure for repairing the mine access road as claimed in claim 1, wherein: the horizontal distance between adjacent anchor cables (2) in the same row is 3-4 m, the horizontal distance between adjacent anchor rods (3) in the same row is 3-4 m, and the distance between adjacent steel rail piles (1) is 3-4 m; the thickness of the reinforced concrete plate wall (4) is 60-80 cm.

3. The pile-anchor wall combined reinforcing structure for repairing the mine access road according to claim 1 or 2, wherein: the gradient of the reinforced concrete slab wall (4) is equal to the original design gradient of the mine side slope.

4. The pile-anchor wall combined reinforcing structure for repairing the mine access road as claimed in claim 3, wherein: the total row number of the anchor cables (2) and the anchor rods (3) is 4-5.

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