CN114382096A - Mining area soil backfilling system and soil crack detection and repair method - Google Patents
Mining area soil backfilling system and soil crack detection and repair method Download PDFInfo
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- CN114382096A CN114382096A CN202210093973.9A CN202210093973A CN114382096A CN 114382096 A CN114382096 A CN 114382096A CN 202210093973 A CN202210093973 A CN 202210093973A CN 114382096 A CN114382096 A CN 114382096A
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- 230000008439 repair process Effects 0.000 title claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 73
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/20—Securing of slopes or inclines
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D1/00—Investigation of foundation soil in situ
- E02D1/02—Investigation of foundation soil in situ before construction work
- E02D1/027—Investigation of foundation soil in situ before construction work by investigating properties relating to fluids in the soil, e.g. pore-water pressure, permeability
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/11—Improving or preserving soil or rock, e.g. preserving permafrost soil by thermal, electrical or electro-chemical means
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
Abstract
The invention discloses a mining area soil backfill system and a soil crack detection and repair method, which are applied to a low-water-seepage ground, wherein a partition frame is distributed on the surface of the ground, a plurality of accommodating holes which are communicated up and down are formed in the partition frame, a filling layer is arranged in each accommodating hole, a liquid level sensor I is arranged in each filling layer, and a covering soil layer covers the partition frame, wherein a crack is generated on the surface of the ground close to a slope of the ground, the crack passes through the accommodating holes, water in each accommodating hole flows into the crack, the filling layer and the covering soil layer corresponding to the crack are peeled off, water in the crack is extracted, a saline solution is added into the crack, and a filling and sealing component is sealed at an opening of the crack; the mining area soil backfilling system and the soil crack detection and repair method achieve early warning of crack formation, detect the crack volume by reducing the concentration of the salt solution, and reduce expansion risks of the crack caused by icing due to the low freezing point of the salt solution in the crack.
Description
Technical Field
The invention relates to the technical field of soil backfilling, in particular to a mining area soil backfilling system and a soil crack detection and repair method.
Background
The water permeability of the ground of the quarry is poor, the vegetation is damaged seriously, the ground loses protective precipitation, soil infiltration adsorption and plant interception almost completely form surface runoff, the backflow time is short, the water flow potential energy is large, mud-rock flow or torrential flood is easily caused, the ground of the quarry is often backfilled by soil and plants are planted, the original stress balance of the side slope is broken due to mining damage or over-steep and over-high side slope, the risk of cracks on the surface of the side slope caused by stress change is increased, the cracks are easily expanded and developed to cause slope landslide collapse, and the cracks are difficult to observe after the ground is covered by soil.
Disclosure of Invention
The invention aims to overcome the existing defects and provides a mine area soil backfill system and a soil crack detection and repair method, which realize early warning of crack formation, detect the crack volume by adding a salt solution into the crack and utilizing the reduction of the concentration of the salt solution, reduce the expansion risk of the crack caused by icing due to the low freezing point of the salt solution in the crack and effectively solve the problems in the background technology.
The technical scheme adopted by the invention for solving the technical problem comprises the following steps:
on the one hand, the utility model provides a mining area soil backfilling system is applied to the ground of low infiltration, the frame is cut apart to the surface laid on the ground, cut apart the holding hole that is equipped with intercommunication about a plurality of on the frame, all be equipped with the filling layer in every holding hole, all be equipped with level sensor one in every filling layer, it has the earthing layer to cut apart the frame coats.
Wherein, the ground surface is close to its slope and produces the crack, and the crack is through holding the hole and the downthehole water of holding flows into the crack.
And stripping the filling layer and the covering soil layer corresponding to the crack, pumping water out of the crack, and adding a salt solution into the crack.
And the opening of the crack is sealed and filled with a sealing component.
The controller is adopted as a preferable technical scheme of the invention, the crack is provided with a second liquid level sensor near the opening, and the second liquid level sensor is positioned below the sealing component.
A covering strip is arranged on the upper side of the ground and completely covers the sealing component;
the controller is respectively and electrically connected with the first liquid level sensor and the second liquid level sensor to supply power to the liquid level sensors.
As a preferable technical scheme, the device further comprises at least two guide pipes, one end of each guide pipe is located in the crack, and the other end of each guide pipe penetrates through the sealing assembly and the covering strip and extends to the position above the covering strip.
And a plugging head is arranged at one end of the conduit above the covering strip.
As a preferred technical scheme of the invention, a straw layer is arranged between the covering soil layer and the partition frame.
As a preferred technical scheme of the invention, a water filtering layer is arranged between the straw layer and the partition frame, and a plurality of blind pipes are arranged between the water filtering layer and the partition frame.
As a preferred technical scheme of the invention, a plurality of metal anchor rods are arranged on the side slope of the ground.
In a preferred embodiment of the present invention, the sealing member is wax or asphalt.
In another aspect, a soil crack detection and remediation method includes:
the ground surface is close to the slope to generate cracks, the cracks pass through the containing holes, and water in the containing holes flows into the cracks.
And stripping the filling layer and the covering soil layer corresponding to the crack, pumping water in the crack, adding a salt solution into the crack, and measuring the concentration of the salt solution in the crack at intervals of 2-48 h.
The opening of the crack is closed by a filling and closing component.
As a preferable technical scheme of the invention, the number of the guide pipes is two, and the two guide pipes are close to two sides of the crack.
The crack continues to expand, causing the crack volume to increase and the liquid level in the crack to drop.
Hot water (or steam) is injected into the crack through one of the conduits, and the other conduit discharges water (or steam) outwards.
As a preferred technical scheme of the invention, after the opening of the crack is sealed and filled with the sealing component, the covering strip completely shields the sealing component.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the mine area soil backfilling system disclosed by the invention, the ground surface generates cracks near the slope, the cracks pass through the containing holes, water in the containing holes flows into the cracks, and the controller detects that the water level in part of the containing holes in the partition frame is reduced through the liquid level sensor I, so that the monitoring and early warning of the cracks are realized.
2. According to the mine area soil backfilling system disclosed by the invention, on one hand, a salt solution is added into the cracks, the salt solution is fully diffused in the water of the cracks, then the concentration of the salt solution in the cracks is measured, the volume of the cracks is obtained according to the reduction of the concentration of the salt solution, and the risk of side slope collapse caused by crack fracture is judged in an auxiliary manner; on the other hand, the cracks are filled with the salt solution, and the salt solution is lower than the freezing point of water, so that the risk of water freezing in the cracks caused by low temperature in winter is reduced, and the development and expansion of the cracks caused by freezing are avoided; on the other hand, when the crack expands to cause that the sealing assembly cannot effectively block the crack opening, hot water or steam is injected into the crack through one of the guide pipes, the sealing assembly is softened when being heated and blocks the crack opening, the covering strip blocks and enables the sealing assembly to be located at the crack opening, the sealing assembly enables the inside of the crack to be isolated from the partition frame, mixing of water in the partition frame accommodating hole and saline in the crack is avoided, and influence of the saline on plant growth on the covering soil layer is reduced.
3. According to the mining area soil backfilling system disclosed by the invention, the straw layer prevents the crushed soil from entering the clearance in the water filtering layer to influence the water accumulation effect of the water filtering layer in the process of laying the covering soil layer, the crushed soil of the covering soil layer is gradually changed into a whole, and the straw layer is fermented along with time to provide nutrients for the plants planted on the covering soil layer.
Drawings
FIG. 1 is a schematic view of a structure according to the present invention;
FIG. 2 is a schematic illustration of an explosive structure according to the present invention;
FIG. 3 is a structural schematic view of the fracture plugging state of the present invention;
fig. 4 is an enlarged view of a structure shown in fig. 3.
In the figure: the device comprises a covering soil layer 1, a ground 2, a controller 3, a straw layer 4, a water filtering layer 5, a blind pipe 6, a liquid level sensor I7, a filling layer 8, a partition frame 9, a guide pipe 10, a sealing assembly 11, a liquid level sensor II 12 and a covering strip 13.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows: referring to fig. 1-4, the embodiment discloses a mining area soil backfilling system, which is applied to a ground 2 with low water seepage, wherein the ground 2 is an operation surface left after mining in a quarry, partition frames 9 are distributed on the surface of the ground 2, the partition frames 9 are close to side slopes, a plurality of accommodating holes which are communicated up and down are formed in the partition frames 9, a filling layer 8 is arranged in each accommodating hole, a first liquid level sensor 7 is arranged in each filling layer 8, a soil covering layer 1 covers the partition frames 9, the filling layer 8 covers the soil covering layer 1, and the horizontal area of the soil covering layer 1 is 10-50 m.
A crack is generated on the upper surface of the ground 2 near the slope, the crack passes through the containing hole, water in the containing hole flows into the crack, then the filling layer 8 corresponding to the crack and the soil covering layer 1 are stripped, the water in the crack is pumped out, water remains at the lower part of the crack, a saline solution is added into the crack, and the volume and the concentration of the saline solution are not limited; the salt solution is preferably a saturated solution.
The opening of the slit is closed with a filling closure assembly 11.
Preferably, be equipped with straw layer 4 between cover soil layer 1 and cut apart the frame 9, further be equipped with water filtering layer 5 between straw layer 4 and the cut apart frame 9, be equipped with a plurality of blind pipe 6 between water filtering layer 5 and the cut apart frame 9.
A plurality of metal anchor rods are arranged on the side slope of the ground 2.
The closure assembly 11 of this embodiment is wax or asphalt; the wax is paraffin melting point 57-63 deg.C, polyethylene wax 102-115 deg.C, EVA wax melting point 93-100 deg.C or PP wax melting point 100-135 deg.C; the asphalt is preferably coal asphalt with a softening point lower than 70 ℃ or asphalt with a softening point lower than 100 ℃.
The covering soil layer 1 is mellow soil capable of planting plants; the filling layer 8 is sand, gravel or a plastic frame with a water through hole.
The embodiment also comprises a controller 3, and the controller 3 is electrically connected with the first liquid level sensor 7 to supply power to the first liquid level sensor.
The working process and principle of the embodiment are as follows:
a dividing frame 9 is arranged on the upper surface of the ground 2 in a range of 2-10m close to a side slope of the ground, a filling layer 8 is placed in an accommodating hole of the dividing frame 9, and then a soil covering layer 1 of 30-100cm is covered on the dividing frame 9.
After precipitation or irrigation, water permeates into the filling layer 8 from the soil covering layer 1, and water storage of the containing holes of the partition frames 9 is achieved.
When a crack is generated on the surface of the ground 2 close to the slope, the crack passes through the containing hole and water in the corresponding containing hole flows into the crack, the controller 3 detects that the water level in the containing hole in the partition frame 9 is reduced through the first liquid level sensor 7, and the formation monitoring of the crack is convenient to solve the problem that the blocking of soil to the crack is inconvenient to monitor the formation of the crack; stripping the filling layer 8 and the overburden layer 1 corresponding to the containing hole with the lowered liquid level to expose the crack, pumping out water in the crack, adding a salt solution into the crack at intervals of 2-48h, enabling the salt solution to be fully diffused in the water in the crack, then measuring the concentration of the salt solution in the crack, obtaining the approximate volume of the crack according to the reduction of the concentration of the salt solution, and assisting in judging the risk of side slope collapse caused by crack fracture.
Wherein the volume of the fracture is obtained from the decrease in the concentration of the salt solution, and is obtained by the following formula:
V2=V1×M1÷M2；
m1 saline solution pre-dilution concentration; concentration of M2 salt solution after dilution;
v1 saline solution pre-dilution volume; volume of V2 saline solution after dilution, i.e. volume of fracture; the inner wall of the crack is soaked by water entering at the early stage, the salt solution added later is adsorbed by the inner wall of the crack, the influence on the measurement of the volume of the crack is small, the concentration is measured at intervals of 2-48 hours after the salt solution is added, and the influence on the measurement of the volume of the crack caused by water evaporation is small; in addition, the measurement of the fracture volume in the embodiment is an approximate volume of the fracture which is obtained through error measurement and calculation, and the error is within an allowable range.
And (3) closing the opening of the crack, filling the sealing assembly 11, repairing the filling layer 8 and the partition frame 9, and backfilling the overburden 1.
The sealing assembly 11 prevents the salt solution in the crack from contacting with the water in the containing hole of the cutting frame 9, and prevents the salt solution in the crack from diffusing into the containing hole of the cutting frame 9 to influence the plants planted on the soil covering layer 1.
And (3) irrigating or dewatering, wherein water seeps downwards through the covering soil layer 1 and gathers in the filling layer 8, so that the plants planted on the covering soil layer 1 can be supplied with water in the growing process.
A straw layer 4 is arranged between the covering soil layer 1 and the partition frame 9, a water filtering layer 5 is further arranged between the straw layer 4 and the partition frame 9, and a plurality of blind pipes 6 are arranged between the water filtering layer 5 and the partition frame 9; the water filtering layer 5 is sand or gravel, water on the overburden layer 1 in the irrigation or precipitation process seeps downwards through the straw layer 4 and enters the water filtering layer 5 and the filling layer 8, the water in the water filtering layer 5 flows out to an external water accumulation position along the blind pipe 6, the water accumulation position is a water storage tank or a water storage pool, the water at the water accumulation position can be irrigated for the second time, and the water resource utilization rate is improved; straw layer 4 avoids laying 1 garrulous soil of overburden layer and enters into the 5 internal gaps of drainage layer and influence 5 ponding effects in drainage layer, and the kibbling soil of overburden layer becomes the monoblock gradually, and straw layer 4 ferments with time, provides the nutrient for the plant of planting on overburden layer 1.
Preferably, when the crack threat is too large, a metal anchor rod is arranged on the side slope corresponding to the crack to enhance the stability of the side slope; the resistance between the adjacent metal anchor rods is measured through an external resistance meter, when the measured resistance between the two metal anchor rods is smaller than a preset value, the measured metal anchor rods are in contact with a salt solution, and the expansion range of the crack in the vertical direction is convenient to determine.
The salt solution is sodium chloride solution, sodium bicarbonate solution, calcium sulfate solution, etc., and the salt solution does not react with the stone.
The partition frame 9 is cement poured on the ground 2; or the dividing frame 9 comprises clay and a wood plate frame, the wood plate frame is firstly placed on the upper surface of the ground 2, the middle part of the wood plate frame is provided with a communicated vertically-arranged placing hole, the clay is placed in the placing hole, and the clay is in contact with the ground 2; when water is accumulated in the containing holes of the partition frame 9, the water in the adjacent containing holes cannot flow through the partition frame 9.
Furthermore, the crack is filled with a salt solution, and the salt solution is lower than the freezing point of water, so that the risk of water freezing in the crack caused by low temperature in winter is reduced, and the development and expansion of the crack caused by freezing are avoided.
Furthermore, a retaining wall is arranged on the upper edge of the side slope.
Example two: as shown in fig. 3 and 4, the present embodiment discloses a mine soil backfill system, which has a structure substantially the same as that of the first embodiment, except that a second liquid level sensor 12 is disposed at a position close to an opening of a crack, and the second liquid level sensor 12 is disposed below a sealing assembly 11.
The upper side of the ground 2 is provided with a covering strip 13, and the covering strip 13 completely covers the sealing component 11.
The controller 3 is electrically connected with the second liquid level sensor 12 to supply power to the second liquid level sensor.
The preferred controller 3 is positioned above the overburden 1.
The controller 3 includes but is not limited to a single chip microcomputer, a PLC controller or a computer, the detection of the water level by the controller 3 through the first liquid level sensor 7 and the detection of the water level by the controller 3 through the second liquid level sensor 12 are common methods in the prior art, the controller 3, the first liquid level sensor 7, the second liquid level sensor 12 and the like used in the present invention are common electronic components in the prior art, the working mode and the circuit structure thereof are well known technologies, and no further description is provided herein.
Further, the second liquid level sensor 12 is a floating ball type liquid level sensor, an ultrasonic liquid level sensor or a radar liquid level sensor.
The closure member 11 is a soft rubber cloth or a water-tight and expandable adhesive cloth.
The working process and principle of the embodiment are as follows:
when the crack is expanded and developed after being treated, the water level of the saline solution in the crack is reduced due to the increase of the volume of the crack, and the controller 3 detects the water level reduction in the crack through the second liquid level sensor 12, so that the development condition of the crack can be conveniently mastered; the crack inner wall is its permeability of stone material poor, and the salt solution is little because of the loss that the infiltration caused, and the crack opening is sheltered from by seal assembly 11, the salt solution can not produce the loss because of the evaporation, guarantees that the error of testing result is in allowed range.
Further, the upper surface of the floor 2 is sprayed or brushed with a waterproof paint commonly used in the prior art.
Example three: as shown in fig. 3, the present embodiment discloses a backfill system for mine soil, which has a structure substantially the same as that of the second embodiment, except that the present embodiment further includes at least two guide pipes 10, one end of each guide pipe 10 is located in the crack, and the other end of each guide pipe 10 penetrates through the sealing assembly 11 and the covering strip 13 and extends to above the covering strip 13.
The end of the conduit 10 above the covering strip 13 is provided with a plugging head.
The working process and principle of the embodiment are as follows:
the controller 3 detects the water level reduction in the crack through the second liquid level sensor 12, namely the crack has the risk of expansion and development, the sealing component 11 can not effectively seal the crack opening, the sealing heads on the two guide pipes 10 are all taken down, saline is filled in the crack through the saline in the crack through one of the guide pipes 10, then hot water or steam is injected into the crack through one of the guide pipes 10, the sealing component 11 is softened when meeting heat and floats on the saline, the opening of the crack is sealed again when the sealing component 11 flows, the covering strip 13 blocks and enables the sealing component 11 to be located at the crack opening, the sealing component 11 enables the inside of the crack to be isolated from the partition frame 9, the mixing of the saline in the containing hole of the partition frame 9 and the saline in the crack is avoided, and the influence of the saline on the covering soil layer 1 on plant growth is avoided.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a mining area soil backfilling system, is applied to ground (2) of low infiltration, its characterized in that: a dividing frame (9) is arranged on the surface of the ground (2), a plurality of accommodating holes which are communicated up and down are formed in the dividing frame (9), a filling layer (8) is arranged in each accommodating hole, a first liquid level sensor (7) is arranged in each filling layer (8), and a soil covering layer (1) covers the dividing frame (9);
the surface of the ground (2) is close to the slope to generate the crack, the crack passes through the containing hole, and water in the containing hole flows into the crack;
wherein the filling layer (8) corresponding to the crack is stripped from the covering soil layer (1), and a salt solution is added into the crack;
the opening of the crack is sealed and filled with a sealing component (11).
2. The mining area soil backfilling system according to claim 1, wherein: the crack detection device comprises a controller (3), wherein a second liquid level sensor (12) is arranged at the position, close to the opening of the crack, and the second liquid level sensor (12) is located below a sealing component (11);
a covering strip (13) is arranged on the upper side of the ground (2), and the covering strip (13) completely covers the sealing component (11);
the controller (3) is respectively electrically connected with the first liquid level sensor (7) and the second liquid level sensor (12) to supply power to the liquid level sensors;
one end of the guide pipe (10) extends to the upper part of the soil covering layer (1).
3. The mining area soil backfilling system according to claim 2, wherein: the device is characterized by further comprising at least two guide pipes (10), wherein one ends of the guide pipes (10) are located in the cracks, and the other ends of the guide pipes (10) penetrate through the sealing assembly (11) and the covering strips (13) and extend to the upper parts of the covering strips (13);
and a plugging head is arranged at one end of the conduit (10) above the covering strip (13).
4. The mine soil backfilling system according to any one of claims 1-3, wherein: a straw layer (4) is arranged between the soil covering layer (1) and the partition frame (9).
5. The mining area soil backfilling system according to claims 1-4, wherein: a water filtering layer (5) is arranged between the straw layer (4) and the cutting frame (9), and a plurality of blind pipes (6) are arranged between the water filtering layer (5) and the cutting frame (9).
6. The mining area soil backfilling system according to claim 1, wherein: and a plurality of metal anchor rods are arranged on the side slope of the ground (2).
7. The mining area soil backfilling system according to claim 1, wherein: the closing component (11) is wax or asphalt.
8. A mining area ground crack detection and repair method is characterized by comprising the following steps: applying the mine soil backfill system according to any one of claims 1-7;
a crack is generated on the surface of the ground (2) near the slope, the crack passes through the containing hole, and water in the containing hole flows into the crack;
stripping a filling layer (8) and a covering soil layer (1) corresponding to the crack, adding a salt solution into the crack, and measuring the concentration of the salt solution in the crack at intervals of 2-48 h;
the opening of the crack is closed by a filling and closing component (11).
9. The method of claim 8, wherein:
the number of the guide pipes (10) is two, and the two guide pipes (10) are close to two sides of the crack;
the crack continues to expand, the crack volume is increased, and the liquid level in the crack is lowered;
hot water (or steam) is injected into the crack through one of the conduits (10), and the other conduit (10) discharges water (or steam) outwards.
10. The method for detecting and repairing ground cracks of mining areas according to claim 8, wherein: after the opening of the crack is sealed and filled with the sealing component (11), the covering strip (13) completely shields the sealing component (11);
and measuring the resistance between the adjacent metal anchor rods.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093973.9A CN114382096B (en) | 2022-01-26 | 2022-01-26 | Mining area soil backfill system and soil crack detection and repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210093973.9A CN114382096B (en) | 2022-01-26 | 2022-01-26 | Mining area soil backfill system and soil crack detection and repair method |
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| CN114382096B (en) | 2024-01-30 |
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