CN112761718B - Method for controlling residual subsidence of earth surface by filling paste material structure - Google Patents
Method for controlling residual subsidence of earth surface by filling paste material structure Download PDFInfo
- Publication number
- CN112761718B CN112761718B CN202110028989.7A CN202110028989A CN112761718B CN 112761718 B CN112761718 B CN 112761718B CN 202110028989 A CN202110028989 A CN 202110028989A CN 112761718 B CN112761718 B CN 112761718B
- Authority
- CN
- China
- Prior art keywords
- filling
- working face
- pier
- bag
- wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 51
- 239000000463 material Substances 0.000 title claims abstract description 30
- 239000003245 coal Substances 0.000 claims abstract description 41
- 238000005065 mining Methods 0.000 claims description 16
- 239000000945 filler Substances 0.000 claims description 13
- 210000001624 hip Anatomy 0.000 claims description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000004568 cement Substances 0.000 claims description 7
- 239000010881 fly ash Substances 0.000 claims description 5
- 239000011435 rock Substances 0.000 claims description 5
- 239000004567 concrete Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 238000013278 delphi method Methods 0.000 claims description 3
- 238000002474 experimental method Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims description 2
- 235000011837 pasties Nutrition 0.000 claims 4
- 238000009827 uniform distribution Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 4
- 238000009415 formwork Methods 0.000 description 11
- 239000010883 coal ash Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000012447 hatching Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000001808 coupling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/005—Methods or devices for placing filling-up materials in underground workings characterised by the kind or composition of the backfilling material
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/02—Supporting means, e.g. shuttering, for filling-up materials
- E21F15/04—Stowing mats; Goaf wire netting; Partition walls
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F15/00—Methods or devices for placing filling-up materials in underground workings
- E21F15/08—Filling-up hydraulically or pneumatically
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a method for controlling surface residual settlement by filling a paste material structure, which comprises the following steps: before the working face begins to produce, the condition of the overlying strata of the mine and the working face parameters are investigated, and calculation is carried out according to the investigated data; after the working face begins to produce, a boundary strip wall with the length equal to that of the working face is built after the working face is tightly attached to the working face in the incision hole, so that lateral supporting force is provided for the coal wall after the working face, and the coal wall is prevented from caving after the working face; and (4) filling the strip-pier column spacing structure according to the actual condition of the working face. The method can save filling materials, reduce the filling cost and simultaneously obtain excellent filling effect.
Description
Technical Field
The invention relates to a method for controlling surface residual settlement by filling a paste material structure, and belongs to the technical field of mine engineering.
Background
Coal is an important component of the energy market in China and plays an indispensable role in the development of national economy. The mining forms of coal resources are mainly divided into two types: surface mining and well mining. In our country, coal is mined by a well-working method in most mining areas because of the deep burial of the coal. Therefore, the ground surface subsidence caused by coal mining has the impact of the damage to the terrain caused by the ground surface subsidence, and the irreversibility of the damage to cultivated land and houses becomes the environmental problem caused by coal mining, which has the largest influence range and most attracts the wide attention of the society. With the increasing attention to environmental problems of the country and society in recent years, most coal mines pay attention to and manage surface subsidence, and the existing methods for managing the surface subsidence mainly comprise two methods, namely coal pillar mining and filling mining. Filling mining gradually becomes a main means for controlling surface subsidence because of the advantages of high mining rate, ecological environment protection and the like. However, at present, the filling and mining still faces many problems, and on one hand, the current filling and mining scheme focuses on surface subsidence, and the control on residual subsidence cannot be realized mainly during surface movement. However, the existing research shows that the residual subsidence is a long-term slow process, and secondary severe subsidence is easily generated under the influence of ground construction and adjacent working face mining, and the surface ecological environment and the landform are seriously damaged. On the other hand, the problem that the existing filling material has overhigh cost is caused because the ratio of the coal mine solid waste is low and cannot meet the filling requirement.
The reason is that the residual deformation of the earth surface mainly occurs after the disturbance caused by mining is finished, and the mechanism of the residual deformation is different from the mechanism of subsidence in the moving period of the earth surface. During the residual subsidence, the boundary cavity of the goaf is closed under the action of the pressure of the overlying strata, meanwhile, the filling materials of the goaf are influenced by factors such as water and pressure, cracks appear inside the goaf and then are damaged, and the space of the goaf is further compressed. The deformation of the goaf is reflected to the surface along with the migration of the overlying strata, namely the residual subsidence. Therefore, there is a need for an effective filling material and associated apparatus and method that can effectively control the residual surface subsidence.
The ground surface subsidence control scheme mostly adopts a goaf filling method, and the existing filling scheme does not design residual subsidence, so that the problems of goaf boundary cavity closure causing the residual subsidence and filler damage caused under the water and pressure coupling action cannot be solved; and the output rate of the coal mine solid waste is low, so that the requirement of the filling material cannot be met, and the cost is increased.
Disclosure of Invention
In order to solve the problem that the existing filling scheme cannot solve the residual subsidence of the ground surface and reduce the filling cost, the invention provides a device and a method for controlling the residual subsidence of the ground surface by filling a paste material structure.
The paste material structure filling provided by the invention is a concept provided by the subject group, and aims to plan before mining through coal seam distribution characteristics and the like, and then fill through a filling body with a column (pier) shaped or strip-shaped structure, so that the paste material structure filling is called as structure filling, the environment can be protected, and the filling cost can be reduced.
The invention aims to provide a method for controlling surface residual settlement by filling a paste material structure, which comprises the following steps:
a. the method comprises the following steps of (1) surveying the condition of an overlying rock stratum of a mine and working surface parameters before the working surface starts to produce, determining the length L of the working surface according to the surveyed data, uniformly distributing loads q on the overlying rock stratum, and measuring the compressive strength F of a strip filling body and the maximum bearing capacity F of a pier-shaped filling body through a rock experiment;
b. calculating according to the investigated data to make the bearing ratio of the filling strip to the pier-shaped filling body be 1: 2; determining the distance between the filling strip walls and calculating according to the investigated data to ensure that the bearing ratio of the filling strips to the pier-column-shaped filling bodies is 1: 2; determining the filling strip wall spacing a = k 1 L, strip wall width
The number of rows of pier-shaped filling bodies between every two strip walls
Each row ofThe number of the pier-shaped filling bodies is
Interval of each row of pier-column-shaped filling bodies
Distance between pier column-shaped filling bodies in row
Wherein k is 1 、k 2 、k 3 、k 4 A safety factor is set;
c. after the working face begins to produce, a boundary strip wall with the length equal to that of the working face is built after the working face is tightly attached to the working face in the incision hole, so that lateral supporting force is provided for the coal wall after the working face, and the coal wall is prevented from caving after the working face;
d. when the working face is pushed to a position 2-3m away from the preset first row of pier columnar filling bodies, the distance from the goaf to the upper bottom boundary a of the strip wall 1 At the beginning, with the advance of the working surface, at an interval a 1 Equidistant masonry n 1 The distance between every two pier column-shaped filling bodies in the row is a 2 ；
e. When the working face is pushed to a position 2-3m away from the preset strip wall filling position, filling the gob strip wall at a position a away from the previous strip wall;
f. repeating the steps d and e until the stoping is finished to the stoping line of the working face;
g. after the working face equipment is withdrawn, a boundary strip wall with the length equal to that of the working face is built in the stopping line and clings to the coal wall of the stopping line, so that lateral supporting force is provided for the coal wall of the stopping line, and the side wall caving of the coal wall of the stopping line is prevented.
The safety factor k in the step b 1 、k 2 、k 3 、k 4 The determination method is the Delphi method.
The devices involved in the above methods are of two kinds. One is a pier column-shaped filling body template, and the other is a strip wall template.
The pier-column-shaped filling body template consists of a shell and a template hung in the shellThe water-proof filling bag consists of two parts. The shell is a bottomless truncated cone-shaped shell formed by connecting two half parts with the same appearance. The upper part of the shell is provided with a through hole as a filling hole, and filling paste can be injected from the through hole; a row of hooks are arranged on the upper edge inside the shell and are matched with the hanging holes on the filling belt; two pairs of pin lugs are arranged at the joint of the two parts forming the shell, and the two half parts can be fixed through pins; the diameter of the upper bottom inside the shell is d 1 The diameter of the lower bottom is d 2 And the included angle between the side surface and the bottom surface is alpha. The water-proof filling bag is formed by sleeving an inner bag and an outer bag which are different in size through a support frame. The inner bag and the outer bag are circular truncated cone-shaped bag bodies without an upper bottom and a lower bottom; the shape and the size of the outer bag are the same as those of the inner surface of the shell, the upper part of the outer bag is provided with a filling hole corresponding to the position of the filling hole of the shell, and the upper edge of the outer bag is provided with a hanging hole corresponding to the position of a hook of the shell, so that the waterproof filling bag can be hung on the shell; the height of the inner bag is the same as that of the outer bag, the difference between the radius of the upper bottom of the inner bag and the radius of the upper bottom of the outer bag is equal to the difference between the radius of the lower bottom of the inner bag and the radius of the lower bottom of the outer bag, so that the volume of the inner bag is 1/2 of that of the outer bag, and the upper part of the inner bag is provided with filling holes corresponding to the positions of the filling holes of the outer bag. The supporting frame is a cross formed by vertically connecting two rods, and the upper part and the lower part of the waterproof filling bag are respectively provided with one supporting frame, so that the relative positions of the inner bag and the outer bag are fixed.
Further, the method for building the pier-column-shaped filling body comprises the following steps: the waterproof filling bag is hung on the outer shell through the upper part, then the soft paste filling material is filled into the inner bag through the filling hole, after the inner bag is filled, the hard paste filling material is filled into the outer bag, after the outer bag is filled, a pier-column-shaped filling body with hard outer part and soft inner part is formed, and then the process is repeated until all pier-column-shaped filling bodies are filled in a preset range.
The strip wall template is divided into two types, one type is a boundary strip wall template, and the other type is a goaf strip wall template. The two connection modes are the same, and are both a connection body formed by connecting the left plate and the right plate through four cross beams at the corners, and the right plate is provided with through holes as filling holes. The difference is that the cross section of the boundary strip wall template is in a right trapezoid shape, one waist is vertical to the lower bottom, the included angle between the other waist and the lower bottom is 45 degrees, the length of the upper bottom is b, and the length of the lower bottom is 2b; the cross section of the gob stripe wall template is isosceles trapezoid, the included angles between the two waists and the lower bottom are both 45, the length of the upper bottom is b, and the length of the lower bottom is 3b.
Further, the method for building the boundary strip wall comprises the following steps: connecting a plurality of boundary strip wall templates end to end, enabling the waist vertical to the lower bottom to be tightly attached to the coal wall, and filling hard paste fillers into the templates through filling holes in each boundary strip wall template. After filling, a boundary strip wall with the length of l, the cross section of right trapezoid, the upper bottom of b and the lower bottom of 2b is formed.
The goaf strip wall filling method comprises the following steps: and connecting a plurality of goaf strip wall templates end to end, and filling the hard paste filler into the templates through the filling holes on each goaf strip wall template. After filling, a goaf strip wall with the length of l, the cross section of isosceles trapezoid, the upper bottom of b and the lower bottom of 3b is formed.
The hard paste filler in the filling method is characterized in that: the mass ratio of coal gangue to waste concrete to fly ash to cement to water is =3:2:2:1:0.3.
the soft paste filler in the filling method is characterized in that: the mass ratio of coal gangue to coal ash to cement to water is =3:3;1:2.
the invention has the beneficial effects that:
(1) The method carries out strip-pier column spacing structure filling according to the actual condition of the working face, can save filling materials, reduce filling cost and obtain excellent filling effect;
(2) Aiming at the problem of rib caving of the residual sunk coal wall, a boundary strip wall is arranged on a cutting hole and a stoping line to provide lateral supporting pressure for the coal wall, so that rib caving of the coal wall is prevented;
(3) Aiming at the problem of water erosion of residual settlement, a waterproof film is arranged outside the formed pier-column-shaped filling body, so that the filling column can be prevented from being eroded by accumulated water in an old vacant area;
(4) Aiming at the problem of failure after the damage of the residual settlement, the formed pier-column-shaped filling body is divided into two layers, the hard filling paste is arranged outside the pier-column-shaped filling body, the soft filling paste is arranged inside the pier-column-shaped filling body, and the soft filling paste can provide lateral supporting pressure for the hard filling paste to prevent the pier-column-shaped filling body from being damaged; and after the broken, the pier column shaped filling body can continuously play a certain supporting role due to the residual stress of the internal soft filling paste.
Drawings
FIG. 1 is a schematic view of a pier-column-shaped filling body template;
FIG. 2 is a view showing the structure of a water-proof filling bag;
FIG. 3 is an enlarged view of the hook and hanging hole of FIG. 1;
FIG. 4 is a diagram of a border strip wall form;
fig. 5 is a structural view of a gob strip wall formwork.
FIG. 6 is a top view of the filling effect;
FIG. 7 is a view of the structure of FIG. 6 taken along the line I-I.
In the figure 1, a pier column-shaped filling body template; 2. a housing; 3. a waterproof filling bag; 4. a housing fill hole; 5. hooking; 6. hanging holes; 7. a pin lug; 8. an inner bag; 9. an outer bag; 10. a support frame; 11. filling holes of the outer bag; 12. filling holes of the inner bag; 13. a border strip wall form; 14. a goaf strip wall template; 15. filling holes in the boundary strip wall template; 16. filling holes of the strip wall template in the goaf; 17. a boundary strip wall; 18. pier-column-shaped filling bodies; 19. goaf stripe wall.
Detailed Description
The present invention is further illustrated by, but is not limited to, the following examples.
As shown in fig. 1 to 7, the present invention first prepares two filling templates. One is a pier column-shaped filling body template 1, and the other is a strip wall template.
As shown in fig. 1-2, the pier-column-shaped filling body template 1 is composed of a shell 2 and a water-proof filling bag 3 hung in the shell. The shell 2 is a button-shaped shell formed by connecting two half parts with the same appearance. The side surface of the upper part of the shell 2 is provided with a through hole as a shell filling hole 4, and filling paste can be injected from the through hole; a hook 5 is arranged in the upper edge of the shell 2 and is matched with a hanging hole 6 on the filling belt; two pairs of pin lugs 7 are arranged at the joint of the two half parts forming the shell 2, and the two half parts of the shell can be connected and fixed through pins; the diameter of the upper bottom in the shell 2 is 150mm, the diameter of the lower bottom is 450mm, and the included angle between the side surface and the bottom surface is 45 degrees. The water-resisting filling bag 3 is formed by sleeving an inner bag 8 and an outer bag 9 which are different in size through a support frame 10. The inner bag 8 and the outer bag 9 are buckled bowl-shaped bag bodies without upper and lower bottoms; the shape and the size of the outer bag 9 are the same as those of the inner surface of the shell 2, the upper part of the outer bag is provided with an outer bag filling hole 11 corresponding to the position of the shell filling hole 4, and the upper edge of the outer bag is provided with a hanging hole 6 corresponding to the position of the shell hook 5 so that the waterproof filling bag 3 can be hung on the shell 2; the height of the inner bag 8 is the same as that of the outer bag 9, the difference between the radius of the upper bottom of the inner bag 8 and the radius of the upper bottom of the outer bag 9 is equal to the difference between the radius of the lower bottom of the outer bag 9 and the radius of the lower bottom of the inner bag 8, so that the volume of the inner bag 8 is 1/2 of that of the outer bag 9, and the upper part of the inner bag 8 is provided with inner bag filling holes 12 corresponding to the positions of the outer bag filling holes 11. The support frame 10 is a cross formed by vertically connecting two rods, and the upper part and the lower part of the waterproof filling bag 3 are respectively provided with one support frame, so that the relative positions of the inner bag 8 and the outer bag 9 are fixed.
As shown in fig. 3 to 4, the strip wall formworks are divided into two types, one is a boundary strip wall formwork 13, and the other is a gob strip wall formwork 14. The connection mode of the two boards is the same, the two boards are connected by four beams at the corners to form a connector, and a boundary strip wall template filling hole 15 and a goaf strip wall template filling hole 16 are respectively arranged on the right side board. The difference is that the cross section of the boundary strip wall template 13 is in a right trapezoid shape, one waist is vertical to the lower bottom, the included angle between the other waist and the lower bottom is 45 degrees, the length of the upper bottom is 2.5m, and the length of the lower bottom is 5m; the cross section of the gob strip wall formwork 14 is isosceles trapezoid, the included angles between the two waists and the lower bottom are both 45, the length of the upper bottom is 2.5m, and the length of the lower bottom is 7.5m.
The method provided by the invention comprises the following steps:
a. the method comprises the steps of surveying the conditions of the overlying strata of the mine and the parameters of the working face before the working face starts to produce, determining the length of the working face to be 200m according to the surveyed data, uniformly distributing the load on the overlying strata to be 20mpa, and determining the caving step distance of a pier column top plate to be 25m, and determining the compressive strength of a strip filling body to be 9mpa and the maximum bearing capacity of a pier column filling body to be 3000KN through a rock experiment.
b. According to the data, the loading ratio of the filling strips to the pier-shaped filling bodies is 1:2. The space between filling strip walls is determined to be 18m, and the width of the strip walls is determined to be 2.5m. The number of rows of the pier-column-shaped filling bodies between every two strip walls is 2, the number of the pier-column-shaped filling bodies in each row is 20, the distance between every two rows of the pier-column-shaped filling bodies is 1.5m, and the distance between every two rows of the pier-column-shaped filling bodies is 4.5m.
c. After the working face begins to produce, a boundary strip wall 17 with the length equal to that of the working face is built after the working face is tightly attached to the working face in the incision hole, so that lateral supporting force is provided for the working face to the coal wall, and the working face is prevented from caving to the coal wall.
d. After the working face is pushed for a certain distance, 2 rows of pier-column-shaped filling bodies 18 are built at equal intervals of 1.5m from the position of the goaf 1.5m away from the bottom boundary of the strip wall, and the distance between the pier-column-shaped filling bodies in the rows is 4.5m.
e. After the working face is pushed for a certain distance, filling the goaf strip wall 19 at a position 18m away from the previous strip wall.
f. And d, repeating the step d and the step e until the stoping is finished to the stoping line of the working face.
g. After the working face equipment is withdrawn, a boundary strip wall 17 with the length equal to that of the working face is built in the stopping line and clings to the coal wall of the stopping line, so that lateral supporting force is provided for the coal wall of the stopping line, and the coal wall of the stopping line is prevented from caving.
FIGS. 6 and 7 are views illustrating the filling effect of the present invention, and FIG. 7 is a view illustrating the structure of FIG. 6 along the section line I-I; the hatching I-I is to show the structure and the appearance of the filling strips and the filling piers, and both adopt section hatching.
The safety factor k in the step b 1 、k 2 、k 3 、k 4 The determination method is a Delphi method.
The masonry method of the boundary strip wall 17 comprises the following steps: a plurality of boundary strip wall formworks 13 are connected end to end, so that the waist perpendicular to the lower bottom is tightly attached to the coal wall, and then hard paste fillers are filled into the formworks through filling holes 15 on each boundary strip wall formwork 13. After filling, a boundary strip wall 17 with the length of 200m, the cross section of right trapezoid, the upper bottom of 2.5m and the lower bottom of 7.5m is formed.
The building method of the pier columnar filler 18 comprises the following steps: the waterproof filling bag 3 is hung on the shell 2 through the upper part, then the soft paste filling material is filled into the inner bag 8 through the filling hole 4, after the inner bag 8 is filled, the hard paste filling material is filled into the outer bag 9, after the outer bag 9 is filled, a pier-column-shaped filling body 18 with hard outside and soft inside is formed, and then the process is repeated until all pier-column-shaped filling bodies 18 are filled in a preset range.
The goaf strip wall 19 filling method comprises the following steps: a plurality of goaf strip wall formworks 14 are connected end to end, and then a hard paste filler is filled into the formworks through filling holes 16 on each goaf strip wall formwork 14. After filling, a goaf stripe wall 19 with the length of 200m, the cross section of isosceles trapezoid, the upper bottom of 2.5m and the lower bottom of 7.5m is formed.
The hard filling paste in the filling method is characterized in that: the mass ratio of coal gangue to waste concrete to fly ash to cement to water is =3:2:2:1:0.3.
the soft filling paste in the filling method is characterized in that: the mass ratio of coal gangue to coal ash to cement to water is =3:3;1:2.
Claims (10)
1. a method for controlling surface residual subsidence by filling a paste material structure is characterized by comprising the following steps:
a. the method comprises the steps of surveying the conditions of the overlying strata of the mine and the parameters of the working face before the working face begins to produce, determining the length L of the working face, the uniform distribution of loads q on the overlying strata, the caving step L of a pier column top plate according to the surveyed data, and measuring the compressive strength f of a strip filling body through a rock experiment 1 The maximum bearing capacity F of the pier column-shaped filling body;
b. calculating according to the investigated data to make the bearing ratio of the filling strip to the pier-shaped filling body be 1: 2; determining fill strip wall spacing a = k 1 L, strip wall width
The number of rows of pier-shaped filling bodies between every two strip walls
The number of each row of pier-shaped filling bodies is
Interval of each row of pier-column-shaped filling bodies
Distance between pier column-shaped filling bodies in row
Wherein k is 1 、k 2 、k 3 、k 4 The safety factor is set; d is a radical of 2 Representing the diameter of the lower bottom of the pier column-shaped filling body template;
c. after the working face begins to produce, a boundary strip wall with the length equal to that of the working face is built after the working face is tightly attached to the working face in the incision hole, so that lateral supporting force is provided for the coal wall after the working face, and the coal wall is prevented from caving after the working face;
d. when the working face is pushed to a position 2-3m away from the preset first row pier columnar filling body, the distance from the goaf to the upper bottom boundary a of the strip wall 1 At the beginning, advancing with the working surface, at an interval a 1 Equidistant masonry n 1 The distance between every two pier column-shaped filling bodies is a 2 ；
e. When the working face is pushed to a position 2-3m away from the preset strip wall filling position, filling the goaf strip wall at a position a away from the previous strip wall;
f. repeating the step d and the step e until the working surface stops the mining line;
g. after the working face equipment is withdrawn, a boundary strip wall with the length equal to that of the working face is built in the stopping line and clings to the coal wall of the stopping line of the working face, so that lateral supporting force is provided for the coal wall of the stopping line, and the side wall caving of the coal wall of the stopping line is prevented.
2. According to claimThe method for controlling surface residual settlement by filling the paste material structure according to claim 1, wherein: the safety factor k in the step b 1 、k 2 、k 3 、k 4 The determination method is the Delphi method.
3. The method of controlling surface subsidence of a pasty material structure filling of claim 1, wherein: when the pier-column-shaped filling body is built, a pier-column-shaped filling body template is used, and the pier-column-shaped filling body template consists of a shell and a waterproof filling bag hung in the shell; the shell is a bottomless truncated cone-shaped shell formed by connecting two half parts with the same appearance; the upper part of the shell is provided with a through hole as a filling hole, and filling paste can be injected from the through hole; a row of hooks are arranged at the upper edge inside the shell and are matched with the hanging holes on the filling bag; two pairs of pin lugs are arranged at the joint of the two parts forming the shell, and the two parts can be fixed through pins; the diameter of the upper bottom inside the shell is d 1 The diameter of the lower bottom is d 2 The included angle between the side surface and the bottom surface is alpha; the waterproof filling bag is formed by sleeving an inner bag and an outer bag which are different in size through a support frame; the inner bag and the outer bag are circular truncated cone-shaped bag bodies without an upper bottom and a lower bottom; the shape and the size of the outer bag are the same as those of the inner surface of the shell, the upper part of the outer bag is provided with a filling hole corresponding to the position of the filling hole of the shell, and the upper edge of the outer bag is provided with a hanging hole corresponding to the position of a hook of the shell, so that the waterproof filling bag can be hung on the shell; the height of the inner bag is the same as that of the outer bag, the difference between the radius of the upper bottom of the inner bag and the radius of the upper bottom of the outer bag is equal to the difference between the radius of the lower bottom of the inner bag and the radius of the lower bottom of the outer bag, so that the volume of the inner bag is 1/2 of that of the outer bag, and the upper part of the inner bag is provided with filling holes corresponding to the positions of the filling holes of the outer bag.
4. A method of controlling surface subsidence by structural filling of a paste material according to claim 3, wherein: the support frame is a cross formed by vertically connecting two rods, and the upper part and the lower part of the waterproof filling bag are respectively provided with one support frame, so that the relative positions of the inner bag and the outer bag are fixed.
5. A method of controlling surface subsidence by structural filling of a paste material according to claim 3, wherein: the building method of the pier-shaped filling body comprises the following steps: the waterproof filling bag is hung on the outer shell through the upper part, then the soft paste filling material is filled into the inner bag through the filling hole, after the inner bag is filled, the hard paste filling material is filled into the outer bag, after the outer bag is filled, a pier-column-shaped filling body with hard outer part and soft inner part is formed, and then the process is repeated until all pier-column-shaped filling bodies are filled in a preset range.
6. The method of controlling surface subsidence of a pasty material structure filling of claim 5, wherein: the hard paste filler in the filling method comprises coal gangue, waste concrete, fly ash, cement and water in a mass ratio of (3: 2:1: 0.3);
in the filling method, the mass ratio of the soft paste filler to the coal gangue, the fly ash, the cement and the water is =3: 1:2.
7. The method of controlling surface subsidence of a pasty material structure filling of claim 1, wherein: when the goaf strip wall is built, a goaf strip wall template is used; when the boundary strip wall is built, a boundary strip wall template is used; the goaf strip wall template and the boundary strip wall template are both connectors formed by connecting a left plate and a right plate through four cross beams at corners, and a through hole is formed in the right side plate to serve as a filling hole; the boundary strip wall template is characterized in that the cross section of the boundary strip wall template is in a right trapezoid shape, one waist is vertical to the lower bottom, the included angle between the other waist and the lower bottom is 45 degrees, the length of the upper bottom is b, and the length of the lower bottom is 2b; the cross section of the goaf strip wall template is isosceles trapezoid, the included angles between the two waists and the lower bottom are both 45, the length of the upper bottom is b, and the length of the lower bottom is 3b.
8. The method of controlling surface subsidence of a pasty material construction pack of claim 7, wherein: the method for building the boundary strip wall comprises the following steps: connecting a plurality of boundary strip wall templates end to end, enabling the waist vertical to the lower bottom to be tightly attached to the coal wall, and then filling hard paste filler into the templates through the filling holes in each boundary strip wall template; after filling, a boundary strip wall with the length of l, the cross section of right trapezoid, the upper bottom of b and the lower bottom of 2b is formed.
9. The method for controlling residual ground subsidence by structural filling of a paste material according to claim 7, wherein: the goaf strip wall filling method comprises the following steps: connecting a plurality of goaf strip wall templates end to end, and filling hard paste fillers into the templates through filling holes in each goaf strip wall template; after filling, a goaf strip wall with the length of l, the cross section of isosceles trapezoid, the upper bottom of b and the lower bottom of 3b is formed.
10. The method for controlling surface residual settlement by filling a paste material structure according to claim 8 or 9, wherein: the mass ratio of the hard paste filler in the filling method is that coal gangue, waste concrete, fly ash, cement and water is =3:2: 1:0.3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110028989.7A CN112761718B (en) | 2021-01-11 | 2021-01-11 | Method for controlling residual subsidence of earth surface by filling paste material structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110028989.7A CN112761718B (en) | 2021-01-11 | 2021-01-11 | Method for controlling residual subsidence of earth surface by filling paste material structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112761718A CN112761718A (en) | 2021-05-07 |
| CN112761718B true CN112761718B (en) | 2023-03-10 |
Family
ID=75701240
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110028989.7A Active CN112761718B (en) | 2021-01-11 | 2021-01-11 | Method for controlling residual subsidence of earth surface by filling paste material structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112761718B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337904A (en) * | 2011-09-09 | 2012-02-01 | 贾民 | Method for retaining gob-side tunnel |
| CN105019924A (en) * | 2015-07-30 | 2015-11-04 | 中国矿业大学 | Strong roof support pier column and method for protecting section coal pillar |
| CN106150546A (en) * | 2016-08-05 | 2016-11-23 | 太原理工大学 | A kind of method carrying out goaf part filling according to earth's surface subsidence |
| CN108180038A (en) * | 2017-12-18 | 2018-06-19 | 太原理工大学 | A kind of pier stud type filling template and its application method |
| CN110307034A (en) * | 2019-04-04 | 2019-10-08 | 中国矿业大学(北京) | The strip-type grouting filling method in goaf |
-
2021
- 2021-01-11 CN CN202110028989.7A patent/CN112761718B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102337904A (en) * | 2011-09-09 | 2012-02-01 | 贾民 | Method for retaining gob-side tunnel |
| CN105019924A (en) * | 2015-07-30 | 2015-11-04 | 中国矿业大学 | Strong roof support pier column and method for protecting section coal pillar |
| CN106150546A (en) * | 2016-08-05 | 2016-11-23 | 太原理工大学 | A kind of method carrying out goaf part filling according to earth's surface subsidence |
| CN108180038A (en) * | 2017-12-18 | 2018-06-19 | 太原理工大学 | A kind of pier stud type filling template and its application method |
| CN110307034A (en) * | 2019-04-04 | 2019-10-08 | 中国矿业大学(北京) | The strip-type grouting filling method in goaf |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112761718A (en) | 2021-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101806226B (en) | Mined out space dam-type filling method | |
| CN104532818A (en) | Treatment method for strip mine goaf | |
| CN105370304B (en) | High stress strong disturbance coal seam gob side entry retaining multistage reinforcement means | |
| CN102071940A (en) | Construction method for mine shaft through multilayer goaf | |
| CN103967031A (en) | Caisson and pile combined foundation of consolidated subsoil and construction method of caisson and pile combined foundation | |
| CN105756091B (en) | A kind of Metro station excavation construction method of control adjacent building composition deformation | |
| CN212641473U (en) | Foundation pit supporting structure adjacent to existing building | |
| CN105201001A (en) | Composite seepage preventing structure for large karst cave in karst region and construction method thereof | |
| CN111663950A (en) | Advanced support and earth pressure unloading mining method | |
| CN111101540A (en) | Construction method for passing existing electric power tunnel on open cut tunnel | |
| CN104863177A (en) | Composite retaining wall structure and construction method thereof | |
| CN109403332A (en) | The wide shallow river valley deep basal pit layering bench of sandy gravel thick-covering combines excavation method | |
| CN103114854A (en) | Pillar robbing method of reconstructed artificial stud | |
| CN202954371U (en) | Vertical combined type seepage-proofing waterproof curtain structure | |
| CN212175793U (en) | Underground protective structure based on underground diaphragm wall and steel open caisson combination formula | |
| CN112761718B (en) | Method for controlling residual subsidence of earth surface by filling paste material structure | |
| CN111236949B (en) | Small-angle cross tunnel construction method | |
| CN107503345A (en) | A kind of deep water foundation pile foundation construction process | |
| CN111042161A (en) | Slope collapse high slope flexible processing structure and construction method thereof | |
| CN105696701A (en) | Along-slope shear wall building development platform and construction method thereof | |
| CN115821997A (en) | Construction method for actively controlling deformation of building through multi-row grouting | |
| CN212003214U (en) | Open-face tunnel lining structure passing through giant karst cave | |
| CN210507458U (en) | Vertical anchor supporting system that draws of foundation ditch | |
| CN109611114B (en) | Underground space excavation method for existing tunnel lying below soil-rock composite stratum | |
| CN214196326U (en) | Open cut combines reverse construction method tunnel entrance to a cave structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |