CN110409360B - A staged construction method of pit bottom reservoir based on the middle bridge of inner row open pit mine - Google Patents
A staged construction method of pit bottom reservoir based on the middle bridge of inner row open pit mine Download PDFInfo
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- 238000003860 storage Methods 0.000 claims abstract description 43
- 238000005086 pumping Methods 0.000 claims abstract description 14
- 239000002689 soil Substances 0.000 claims abstract description 9
- 238000009411 base construction Methods 0.000 claims abstract description 6
- 238000011065 in-situ storage Methods 0.000 claims abstract description 6
- 239000004927 clay Substances 0.000 claims description 35
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- 239000000463 material Substances 0.000 claims description 19
- 229910000831 Steel Inorganic materials 0.000 claims description 14
- 239000010959 steel Substances 0.000 claims description 14
- 238000007789 sealing Methods 0.000 claims description 10
- 239000003245 coal Substances 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 8
- 238000002955 isolation Methods 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 7
- 239000011435 rock Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 239000004746 geotextile Substances 0.000 claims description 3
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
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- E01D18/00—Bridges specially adapted for particular applications or functions not provided for elsewhere, e.g. aqueducts, bridges for supporting pipe-lines
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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
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/22—Lining sumps in trenches or other foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
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Abstract
本发明公开了一种基于内排露天矿中间桥的坑底水库分期建设方法，首期水库建设步骤如下：S1：排土场施工；S2：基底施工；S3：抽水设备布置；S4：桥体施工；S5：隔水墙补充建设；S6：原位建桥；S7：储水层排弃；S8：封顶；S9：排水设备布置；S10：封库；后期水库建设是指在上述首期水库建设完成后，以封库隔水墙作为下一阶段的排土场隔水墙，沿着露天矿的推进方向逐步建设多期水库，形成连续水库群；水资源存储是指通过排水管路将水资源注入坑底水库。本发明的有益效果为：将露天矿采场中间搭桥与坑底水库建设相结合，充分利用露天矿坑底空间资源，坑底水库建设成本低。
The invention discloses a staged construction method for a pit bottom reservoir based on an intermediate bridge of an inner row open pit mine. The first stage reservoir construction steps are as follows: S1: soil dump construction; S2: base construction; S3: arrangement of pumping equipment; S4: bridge body Construction; S5: Supplementary construction of water-resisting wall; S6: In-situ bridge construction; S7: Water storage layer disposal; S8: Capping; S9: Drainage equipment arrangement; S10: Reservoir closure; After the construction is completed, the closed reservoir water barrier will be used as the next stage of the dump site water barrier, and multi-phase reservoirs will be gradually built along the advancing direction of the open-pit mine to form a continuous reservoir group; Water is injected into the bottom reservoir. The beneficial effects of the invention are as follows: the bridge in the stope of the open pit mine is combined with the construction of the bottom reservoir, the space resources at the bottom of the open pit mine are fully utilized, and the construction cost of the bottom reservoir is low.
Description
Technical Field
The invention particularly relates to a pit bottom reservoir staged construction method based on an internal drainage strip mine intermediate bridge, and belongs to the field of mining exploitation and mining area environment management.
Background
The open pit mining is a process of removing a covering on an ore body and mining useful minerals from an open-surface mining field, and the inner-discharging open pit mining is an operation method that stripped materials are directly discharged to a goaf to form an inner-discharging field and the inner-discharging field and coal mining steps of the open pit mining are synchronously pushed. For a strip mine with a nearly horizontal occurrence, in order to shorten the inner-row transportation distance of the stripping materials, the stripping materials are often transported through a middle bridge which is constructed to communicate a stope and an inner-row earth field. The middle bridge is a dynamic bridge, the materials of the middle bridge are stripped materials of the strip mine in the early stage of the bridge use, the unexplored coal in the later stage is used from the beginning of the bridge use to the position where the bridge body materials are changed into the coal, the length of the middle bridge is the shifting step distance of the middle bridge, and the shifting step distance is generally smaller than the stope width of the strip mine with the horizontal bridge floor and is about 200-300 m. In order to ensure the smoothness of a transportation channel, two dynamic intermediate bridges are generally arranged in the strip mine for alternate use, namely: when one bridge is transported, the other intermediate bridge is dismantled, the pressed coal of the bridge body is recovered, and a new bridge is constructed to prepare for the next connection. Generally, the distance between the two middle bridges is 100-300m, the space between the two bridge bodies is huge, and the comprehensive utilization prospect is wide.
In northern areas of China, the climate is arid, the annual evaporation capacity is far larger than the precipitation, and the reclamation demand of open-pit mining areas leads the water resource consumption to be increased sharply, so that the method has important significance for constructing a water storage system to carry out cross-season allocation of water resources in open-pit mines with large water inflow. However, the traditional surface open-air water storage device has the problems of large water resource evaporation loss, serious resource waste and the like, and the construction of the closed water storage device has the defects of high cost, large occupied space and the like, so that the mine water storage and reclamation cost can be greatly increased. The middle bridge is a main transportation channel with the lower part stripped from the inner row of the step, and the high-density vehicle compaction obviously reduces the permeability of bridge materials, so that the middle bridge becomes a good water-stop wall. Therefore, space resources formed by moving the intermediate bridge are effectively integrated with storage of water resources, the stope space utilization rate can be improved, and an effective scheme is provided for storage of the water resources.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a pit bottom reservoir staged construction method based on an intermediate bridge of an inner-drainage strip mine, so as to solve the problems of large water resource storage requirement, high difficulty and waste of intermediate bridge space in a northern strip mine area, improve the water resource storage capacity and realize the utilization of the intermediate bridge space.
In order to achieve the purpose, the invention adopts the technical scheme that:
a pit bottom reservoir stage construction method based on an inner row open pit intermediate bridge comprises first-stage reservoir construction, later-stage reservoir construction and water resource storage, wherein the first-stage reservoir construction comprises the following steps:
s1: constructing a dump in a stope, and when a working line of the lowest floor of the dump in an open pit is 20-30m away from a coal-rock interface of an intermediate bridge, dumping clay from the step of the lowest floor of the dump, wherein the dumping range is 0-200m inside the intermediate bridge, the inner side is between the current intermediate bridge and a second intermediate bridge arranged in the future, the dumping thickness of the clay is 20-30m, a dump waterproof wall is formed, and after the dump waterproof wall is formed, the propulsion is stopped at the position of the lowest step of the dump in the open pit;
s2: the base construction is that after the construction of the dump is finished and the dump waterproof wall is formed, a layer of clay is laid on the inner side of the open pit bottom intermediate bridge by 0-200 and compacted to form the pit bottom waterproof wall, the surface of the pit bottom waterproof wall forms a slope of three thousandths, the position near the dump waterproof wall is lower and gradually increases along the advancing direction of the open pit, and a rectangular pit bottom water collecting tank is arranged near the position near the dump waterproof wall on the surface of the pit bottom waterproof wall;
s3: the arrangement of pumping equipment refers to that after the construction of a foundation is finished and a pit bottom water-stop wall is formed, a pumping pipeline is arranged on the surface of the water-stop wall of the refuse dump, a steel pipe is continued to the pit bottom from the ground surface along the water-stop wall of the refuse dump, one end of the pit bottom is positioned in a pit bottom water collecting tank, the tail end of the pit bottom is provided with a filter head, and one end of the ground surface is connected with a water pump;
s4: constructing a bridge body, namely after the process is finished, beginning to construct a new middle bridge, repeatedly compacting clay at 10-20m of the inner side of the new middle bridge to form a middle bridge waterproof wall, connecting the bottom of the new middle bridge with the pit bottom waterproof wall, connecting the end part of the new middle bridge with the refuse dump waterproof wall, penetrating the refuse dump and stripping steps until the vehicle can be driven, then moving the current middle bridge to a set step pitch, removing the bridge body from one side close to the refuse dump, removing stripped objects in the bridge body, and then beginning to mine coal in the bridge body;
s5: the method comprises the following steps of (1) supplementing and constructing a waterproof wall, namely paving a layer of clay with the length of 20-30m and the width of 50-100m at the lowest step of a dumping site in an open pit along the propelling direction in the current middle bridge dismantling process to ensure that one side of the clay is connected with the dumping site waterproof wall formed in the dumping site construction process, and meanwhile, paving the clay at the bottom of the open pit with the height of 2-4m to form a cuboid middle bridge to ensure that one side of the clay is connected with the pit bottom waterproof wall formed in the base construction process;
s6: building a bridge in situ, namely building a new intermediate bridge at the position of the removed current intermediate bridge as a new intermediate bridge at the next stage, wherein the construction method is the same as that of the new intermediate bridge;
s7: water storage layer discharge, namely, after the construction, starting to discharge materials in a strip mine pit on the inner side of the intermediate bridge to serve as a water storage layer, wherein the discharged materials are massive gravels which are peeled off from the strip mine and do not disintegrate in the presence of water and are not deformed, and pores among the internally discharged materials are large, and the discharge height of the water storage layer is the height of the lowest step of the strip mine dump;
s8: capping, namely laying geotextile at a position reaching a design height in the water storage layer discharge process to form a top plate water-stop wall, and normally discharging soil in an upper soil discharge yard after the top plate water-stop wall is formed;
s9: arranging drainage equipment, namely, mounting a drainage pipeline on the surface of the lowest step of the inner dump when the surface is close to a coal-rock interface of a middle bridge by 20-30m along the gradual forward propulsion of the dump in the strip mine, continuing a steel pipe from the ground surface to a water storage layer along a water-stop wall of the dump, locating one end of the steel pipe on the surface of the water storage layer, and connecting one end of the ground surface with a water pump;
s10: the step of sealing the reservoir means that after the process is finished, clay begins to be discharged and compacted at the lowest step of the inner soil discharge field, and the clay is used as a reservoir sealing water-stop wall to seal a water storage layer, so that the first-stage reservoir construction is finished;
the later stage reservoir construction means that after the first stage reservoir construction is completed, a reservoir sealing water partition wall is used as a refuse dump water partition wall of the next stage, the steps are repeated, and a multi-stage reservoir is built step by step along the advancing direction of the strip mine to form a continuous reservoir;
water resource storage means, and the first reservoir construction is accomplished the back, pours into the water resource into the bottom of the hole reservoir through water drainage pipe way, and water resource storage is between the hole of grit, and a plurality of groups of moisture sensor of symmetrical arrangement are arranged respectively to every isolation layer both sides, and the earth's surface is taken out to the water resource through water pumping pipeline when the soil moisture condition of real-time supervision position needs the water, and the catch basin is collected to what the water resource can be guaranteed to the bottom of the hole diaphragm wall slope, guarantees the access effect.
Preferably, the clay laid in the step 2 in the first reservoir construction is 2-4m thick.
Furthermore, the method is characterized in that a reinforcing mesh is laid on the upper surface of the pit bottom water collecting tank in the step 2 in the first-stage reservoir construction.
Furthermore, the clay in all the isolation layers can be replaced by reinforced concrete.
Preferably, the method is characterized in that in the first stage of reservoir construction, the water pumping equipment in the step 3 and the water draining equipment in the step 9 are arranged, and pipelines are selected to be high-strength compression-resistant steel pipes with the diameters of 500 mm.
The invention has the beneficial effects that: the space between the intermediate bridges of the strip mines is used for reservoir construction and water storage, a large amount of in-situ deep storage of water resources is realized, water evaporation is reduced, most of reservoir construction raw materials come from the strip mines, outsourcing is not needed, and the reservoir construction cost is reduced. Meanwhile, the pit bottom space resources of the strip mine are fully utilized, and water resource guarantee is provided for environmental management of the strip mine. The whole construction process can be mutually connected with strip mine production, the production cost of the strip mine is not increased, the middle bridge of the strip mine stope is combined with the construction of a pit bottom reservoir, and pit bottom space resources of the strip mine are fully utilized.
Drawings
FIG. 1 is a schematic view showing the construction of a refuse dump and the construction of a new intermediate bridge,
figure 2 is a schematic view of the prior middle bridge dismantling and the supplementary construction of a water-stop wall,
figure 3 is a schematic diagram of in-situ bridging,
FIG. 4 is a schematic view of a package,
figure 5 is a side view of the reservoir construction process,
figure 6 is a schematic view of the first stage reservoir construction,
FIG. 7 is a side view of a center bridge diaphragm wall;
in the figure: 1. a refuse dump; 2. a pit bottom; 3, stope mining; 4. a new intermediate bridge; 5. a refuse dump diaphragm wall; 6. a current intermediate bridge; 7. a new intermediate bridge of the next stage; 8. sealing a warehouse and isolating a water wall; 9. a water pumping pipeline; 10. a pit bottom water collecting tank; 11. a pit bottom diaphragm wall; 12. a water storage layer; 13. a roof diaphragm wall; 14. a drain line; 15. intermediate bridge diaphragm wall.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the pit bottom reservoir stage construction method based on the intermediate bridge of the inner row strip mine comprises first-stage reservoir construction, later-stage reservoir construction and water resource storage, wherein the first-stage reservoir construction comprises the following steps:
s1: the construction of the refuse dump 1 in the stope 3, when the working line of the lowest floor of the refuse dump 1 in the strip mine is 20-30m away from the coal rock interface of the intermediate bridge, clay is discarded from the step of the lowest floor of the refuse dump 1, the discarding range is 0-200m inside the intermediate bridge, the clay discarding thickness is 20-30m between the current intermediate bridge 6 and a second intermediate bridge arranged in the future on the inner side, and the refuse dump waterproof wall 5 is formed, and after the refuse dump waterproof wall 5 is formed, the propulsion of the refuse dump 1 at the lowest step is stopped in the strip mine.
S2: the base construction means that after the construction of the dump 1 is completed and the dump 1 waterproof wall is formed, a layer of clay is laid on the inner side of a middle bridge of the bottom 2 of the open pit and compacted within 0-200m, and the thickness of the laid clay is 2-4m as an optimal scheme, so that waste caused by excessive clay can be avoided, the waterproof effect can be ensured, and the situation that the water cannot be blocked due to insufficient use amount is avoided. The pit bottom water-stop wall 11 is formed, the slope of three thousandths is formed on the surface of the pit bottom water-stop wall 11, the position near the dump site water-stop wall 5 is lower, the position is gradually increased along the advancing direction of the strip mine, the rectangular pit bottom water collecting tank 10 is arranged near the dump site water-stop wall 5 on the surface of the pit bottom water-stop wall 11, and as an optimal scheme, a reinforcing mesh is laid on the upper surface of the pit bottom water collecting tank 10, so that the filtering effect can be achieved, and massive materials are prevented from falling into water resources.
S3: and (2) water pumping equipment arrangement, namely, after the construction of the foundation is finished and a pit bottom water-stop wall 11 is formed, installing a water pumping pipeline 9 on the surface of the drainage field water-stop wall 5, continuing a steel pipe from the ground surface to the pit bottom 2 along the drainage field water-stop wall 5, arranging one end of the pit bottom 2 in a pit bottom water collecting tank 10, installing a filter head at the tail end of the pit bottom, and connecting one end of the ground surface with a water pump.
S4: and (3) bridge construction, namely after the process is completed, a new middle bridge 4 is built, clay is adopted for 10-20m of the inner side of the new middle bridge 4 and repeatedly compacted to form a middle bridge waterproof wall 15, the bottom of the new middle bridge 4 is connected with the pit bottom waterproof wall 11, the end part of the new middle bridge is connected with the refuse dump waterproof wall 5, the new middle bridge 4 penetrates through the refuse dump 1 and a stripping step until the vehicle can be driven, then the current middle bridge 6 reaches a transfer step distance, the dismantling is started from one side close to the refuse dump 1, stripped objects in the bridge are removed, and then the coal in the bridge starts to be excavated.
S5: and the step of the supplement construction of the waterproof wall refers to that in the process of the current dismantling work of the intermediate bridge 6, a layer of clay with the length of 20-30m and the width of 50-100m is paved at the lowest step of the refuse dump 1 in the strip mine along the propelling direction, and one side of the clay is ensured to be connected with the waterproof wall of the refuse dump 1 formed in the construction process of the refuse dump 1. Meanwhile, the height of clay laid at the pit bottom 2 of the strip mine is 2-4m, a cuboid intermediate bridge 6 is formed, and one side of the intermediate bridge is connected with a pit bottom water-stop wall 11 formed in the base construction process.
S6: and building the bridge in situ, namely newly building an intermediate bridge at the position of the removed current intermediate bridge 6 to serve as a new intermediate bridge 7 at the next stage, wherein the construction method is the same as that of the new intermediate bridge 4.
S7: the water storage layer 12 is discarded, namely after the construction, materials are discarded from the pit of the strip mine on the inner side of the intermediate bridge to serve as the water storage layer 12, the discarded materials are massive gravels which are peeled off from the strip mine, do not disintegrate when meeting water and are not deformed and have large pores between the materials after internal discharge, and the discarding height of the water storage layer 12 is the height of the lowest step of the strip mine waste dump 1.
S8: capping means that geotextile is laid at a position where the water storage layer 12 reaches a designed height in the process of discharging the water storage layer 12 to form a top plate water-stop wall 13, and after the top plate water-stop wall 13 is formed, the upper part waste dump 1 discharges waste normally.
S9: the arrangement of drainage equipment refers to that when the earth discharge field 1 in an open pit is gradually pushed forward and approaches a coal-rock interface of a middle bridge by 20-30m, a drainage pipeline 14 is installed on the surface of the lowest step of the earth discharge field 1, a steel pipe extends from the earth surface to a water storage layer 12 along a water-stop wall 5 of the earth discharge field, one end of the steel pipe is positioned on the surface of the water storage layer 12, and one end of the earth surface is connected with a water pump. Preferably, in the first reservoir construction, the water pumping equipment in the step 3 and the water draining equipment in the step 9 are arranged, the pipeline is a high-strength compression-resistant steel pipe with the diameter of 500mm, the steel pipe with the standard is selected to ensure that the flow and the flow speed of water are applicable, the construction beat is not influenced, and the compression strength of the steel pipe in the bottom layer can also be ensured.
S10: the step of reservoir sealing is that after the process is completed, the clay begins to be discharged and compacted at the lowest step of the waste dump 1, and the clay is used as a reservoir sealing water-stop wall 8 to seal the water storage layer 12, so that the first-stage reservoir construction is completed, as shown in fig. 4-7.
And the later-stage reservoir construction means that after the first-stage reservoir construction is finished, the reservoir sealing water-stop wall 8 is used as the refuse dump water-stop wall 5 of the next stage, the steps are repeated, the multi-stage reservoir is built step by step along the advancing direction of the strip mine to form a continuous reservoir, and in order to achieve the purpose of better water-stop effect, clay in all the isolation layers can be replaced by reinforced concrete or other artificial water-stop materials.
The water resource storage means, after the first reservoir construction is completed, pour into the 2 reservoirs at the bottom of the hole with the water resource through water drainage pipeline 14, the water resource storage is between the hole of grit, a plurality of groups of water content sensor of symmetrical arrangement are arranged respectively to every isolation layer both sides, the position soil moisture condition of real-time supervision place, when needing the water, take out the earth's surface through water pumping pipeline 9 with the water resource, the bottom of the hole water-stop wall 11 slope guarantees that the water resource can collect the catch basin to the maximum possible, guarantee the access effect, in the in-service use process, when the moisture sensor data of burying in the isolation layer both sides are reduced gradually for an hour, show that the water-stop effect of isolation layer begins to descend, the water-stop layer efficiency is.
Claims (5)
1. A pit bottom reservoir staged construction method based on an inner-discharging strip mine intermediate bridge is characterized by comprising first-stage reservoir construction, later-stage reservoir construction and water resource storage, wherein the first-stage reservoir construction comprises the following steps:
s1: constructing a dump (1) in a stope (3), when a working line of the lowest layer of the dump (1) in an open pit is 20-30m away from a coal-rock interface of an intermediate bridge, dumping clay from the step position of the lowest part of the dump (1), wherein the dumping range is 0-200m inside the intermediate bridge, the inner side is between a current intermediate bridge (6) and a second intermediate bridge arranged in the future, the dumping thickness of the clay is 20-30m, a dump waterproof wall (5) is formed, and after the dump waterproof wall (5) is formed, the dump (1) in the open pit stops propelling at the position of the lowest step;
s2: the foundation construction is that after the construction of the dump (1) is finished and the dump (1) waterproof wall is formed, a layer of clay is laid 0-200m inside a middle bridge at the bottom of the open pit (2) and compacted to form the pit bottom waterproof wall (11), the surface of the pit bottom waterproof wall (11) forms a slope of three thousandths, the position near the dump waterproof wall (5) is lower and gradually increased along the advancing direction of the open pit, and a rectangular pit bottom water collecting tank (10) is arranged on the surface of the pit bottom waterproof wall (11) close to the position near the dump waterproof wall (5);
s3: the arrangement of pumping equipment refers to that after the construction of a base is finished and a pit bottom water-stop wall (11) is formed, a pumping pipeline (9) is arranged on the surface of the drainage field water-stop wall (5), a steel pipe is continued to the pit bottom (2) from the earth surface along the drainage field water-stop wall (5), one end of the pit bottom (2) is positioned in a pit bottom water collecting tank (10), the tail end of the pit bottom is provided with a filter head, and one end of the earth surface is connected with a water pump;
s4: constructing a bridge body, namely after the process is completed, beginning to construct a new middle bridge (4), repeatedly compacting clay on 10-20m of the inner side of the new middle bridge (4) to form a middle bridge waterproof wall (15), connecting the bottom of the new middle bridge (4) with a pit bottom waterproof wall (11), connecting the end part of the new middle bridge with the waterproof wall of the refuse dump (1), penetrating the refuse dump (1) and stripping steps through the new middle bridge (4) until the vehicle can be driven, then moving the middle bridge (6) to a step distance, beginning to dismantle from one side close to the refuse dump (1), removing stripped objects in the bridge body, and then beginning to dig coal in the bridge body;
s5: the method comprises the steps of supplementing and constructing a waterproof wall, namely paving a layer of clay with the length of 20-30m and the width of 50-100m at the lowest step of a dump (1) in an open pit along the propelling direction in the current dismantling process of an intermediate bridge (6), ensuring that one side of the clay is connected with a dump waterproof wall (5) formed in the construction process of the dump (1), and meanwhile, paving the clay at the pit bottom (2) of the open pit with the height of 2-4m to form a cuboid intermediate bridge (6), and ensuring that one side of the clay is connected with a pit bottom waterproof wall (11) formed in the base construction process;
s6: building a bridge in situ, namely newly building an intermediate bridge at the position of the removed current intermediate bridge (6) to be used as a new intermediate bridge (7) in the next stage, wherein the construction method is the same as that of the new intermediate bridge (4);
s7: the water storage layer (12) is discarded, namely materials are discarded as the water storage layer (12) from the pit of the strip mine at the inner side of the intermediate bridge after the construction, the discarded materials are massive gravels which are peeled from the strip mine, do not disintegrate when meeting water and are not deformed and have large pores among the internally-discharged materials, and the discarding height of the water storage layer (12) is the height of the lowest step of the strip mine refuse dump (1);
s8: capping, namely laying geotextile at the position where the water storage layer (12) reaches the designed height during the discharge process of the water storage layer (12) to form a top plate water-stop wall (13), and normally discharging soil in the upper soil discharge yard (1) after the top plate water-stop wall (13) is formed;
s9: the arrangement of drainage equipment refers to that along with the gradual forward propulsion of an earth discharge field (1) in an open pit mine, when the earth discharge field approaches a middle bridge coal rock interface by 20-30m, a drainage pipeline (14) is installed on the surface of the lowest step of the inner earth discharge field (1), a steel pipe extends from the earth surface to a water storage layer (12) along a water-stop wall (5) of the earth discharge field, one end of the steel pipe is positioned on the surface of the water storage layer (12), and one end of the earth surface is connected with a water pump;
s10: the step of sealing the reservoir means that after the process is finished, clay begins to be discharged and compacted at the lowest step of the refuse dump (1) and serves as a reservoir sealing water-stop wall (8) to seal the water storage layer (12), and the first-stage reservoir construction is finished;
the later-stage reservoir construction means that after the first-stage reservoir is constructed, a reservoir sealing water partition wall (8) is used as a refuse dump water partition wall (5) of the next stage, the steps are repeated, and a multi-stage reservoir is built step by step along the advancing direction of strip mines to form a continuous reservoir;
water resource storage means, after the first reservoir construction is completed, water resources are injected into the pit bottom (2) reservoir through a drainage pipeline (14), the water resources are stored between the holes of the sand stones, a plurality of groups of water sensors are symmetrically arranged on two sides of each isolation layer respectively, the soil moisture condition of the position of the location is monitored in real time, when water is needed, the water resources are pumped to the earth surface through a water pumping pipeline (9), and the slope of a pit bottom water-stop wall (11) ensures that the water resources can be collected into the water collecting tank, so that the storing and taking effect is guaranteed.
2. The staged construction method for a pit bottom reservoir based on an intermediate bridge of an inner-drainage strip mine according to claim 1, wherein the clay laid in the step 2 in the first stage reservoir construction is 2-4m thick.
3. The staged construction method for a pit bottom reservoir based on an internal drainage open pit mine intermediate bridge, according to claim 1, characterized in that a mesh reinforcement is laid on the upper surface of the pit bottom water collecting tank (10) in the step 2 in the first stage reservoir construction.
4. The method for the staged construction of the pit bottom reservoir based on the intermediate bridge of the inner-drainage strip mine according to claim 1, wherein the clay in all the isolation layers can be replaced by reinforced concrete or other artificial water-proof materials.
5. The staged construction method for the pit bottom reservoir based on the intermediate bridge of the inner-drainage strip mine according to claim 1, wherein the water pumping equipment arrangement in step 3 and the water drainage equipment arrangement in step 9 in the first-stage reservoir construction are high-strength compression-resistant steel pipes with the diameter of 500 mm.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113026817A (en) * | 2021-04-02 | 2021-06-25 | 中国矿业大学 | Strip mine foundation pit reconstruction underground reservoir and construction method thereof |
| CN113106988B (en) * | 2021-04-14 | 2022-01-25 | 中国矿业大学 | Internal dam body construction method for refuse dump of internal-discharge strip mine |
| CN113107061A (en) * | 2021-04-15 | 2021-07-13 | 中国矿业大学 | Stratum reconstruction method for near-urban abandoned strip mine |
| CN113622364B (en) * | 2021-07-27 | 2022-09-27 | 中国矿业大学 | A construction method for open pit underground reservoirs in poor water areas with a depth greater than 100m |
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| CN113833522B (en) * | 2021-08-20 | 2023-08-11 | 中国恩菲工程技术有限公司 | Method for collecting acidic water in dumping site |
| CN114467704B (en) * | 2022-01-28 | 2022-09-27 | 中国矿业大学 | Open-pit mine dump with near-surface soil sequence reconstruction and its deep water replenishment method |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811129A (en) * | 2005-10-15 | 2006-08-02 | 中国矿业大学 | Walking and bridging inner transport passage for open cast coal mine |
| RU2433268C1 (en) * | 2010-04-12 | 2011-11-10 | Государственное образовательное учреждение высшего профессионального образования "Иркутский государственный технический университет" (ГОУ ИрГТУ) | Method of quarries reclamation (versions) |
| CN102767302A (en) * | 2012-07-23 | 2012-11-07 | 中国神华能源股份有限公司 | Distributed underground reservoir and construction method thereof |
| CN103670419A (en) * | 2013-11-20 | 2014-03-26 | 中国矿业大学 | Run-through inner dumping method between mining areas for opencast coal mine during period of diversion |
| WO2016149850A1 (en) * | 2015-03-24 | 2016-09-29 | Jri Ingenieria S.A. | Integral wasteless mining process |
| CN106761584A (en) * | 2017-02-25 | 2017-05-31 | 太原理工大学 | Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions |
| CN107701229A (en) * | 2017-09-29 | 2018-02-16 | 华北理工大学 | Surface mining landfill is administered and underground head stage casings goaf filling draining Synergistic method |
| CN108716402A (en) * | 2018-05-21 | 2018-10-30 | 中国矿业大学 | A kind of Semicontinuous Technology in Surface Coal Mines intermediate axle arrangement |
| CN109026152A (en) * | 2018-08-27 | 2018-12-18 | 清华大学 | A kind of open coal mine underground reservoir comprising core-wall enrockment checkdam structure |
| CN109057861A (en) * | 2018-08-28 | 2018-12-21 | 清华大学 | A kind of open coal mine underground reservoir, reservoir water storage tank and reservoir capacity calculation method |
-
2019
- 2019-06-20 CN CN201910535712.6A patent/CN110409360B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1811129A (en) * | 2005-10-15 | 2006-08-02 | 中国矿业大学 | Walking and bridging inner transport passage for open cast coal mine |
| RU2433268C1 (en) * | 2010-04-12 | 2011-11-10 | Государственное образовательное учреждение высшего профессионального образования "Иркутский государственный технический университет" (ГОУ ИрГТУ) | Method of quarries reclamation (versions) |
| CN102767302A (en) * | 2012-07-23 | 2012-11-07 | 中国神华能源股份有限公司 | Distributed underground reservoir and construction method thereof |
| CN103670419A (en) * | 2013-11-20 | 2014-03-26 | 中国矿业大学 | Run-through inner dumping method between mining areas for opencast coal mine during period of diversion |
| WO2016149850A1 (en) * | 2015-03-24 | 2016-09-29 | Jri Ingenieria S.A. | Integral wasteless mining process |
| CN106761584A (en) * | 2017-02-25 | 2017-05-31 | 太原理工大学 | Abandoned mine goaf coal bed gas ground discharge and mining method under a kind of aqueous conditions |
| CN107701229A (en) * | 2017-09-29 | 2018-02-16 | 华北理工大学 | Surface mining landfill is administered and underground head stage casings goaf filling draining Synergistic method |
| CN108716402A (en) * | 2018-05-21 | 2018-10-30 | 中国矿业大学 | A kind of Semicontinuous Technology in Surface Coal Mines intermediate axle arrangement |
| CN109026152A (en) * | 2018-08-27 | 2018-12-18 | 清华大学 | A kind of open coal mine underground reservoir comprising core-wall enrockment checkdam structure |
| CN109057861A (en) * | 2018-08-28 | 2018-12-21 | 清华大学 | A kind of open coal mine underground reservoir, reservoir water storage tank and reservoir capacity calculation method |
Non-Patent Citations (1)
| Title |
|---|
| 露天煤矿中间搭桥适用条件与关键参数的确定;刘福明等;《煤炭学报》;20150131;第40卷(第1期);第73-79页 * |
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