CN113266418B - Method for filling fan-shaped radial cemented paste in gob-side entry retaining side goaf - Google Patents
Method for filling fan-shaped radial cemented paste in gob-side entry retaining side goaf Download PDFInfo
- Publication number
- CN113266418B CN113266418B CN202110581705.7A CN202110581705A CN113266418B CN 113266418 B CN113266418 B CN 113266418B CN 202110581705 A CN202110581705 A CN 202110581705A CN 113266418 B CN113266418 B CN 113266418B
- Authority
- CN
- China
- Prior art keywords
- filling
- gob
- curtain
- fan
- goaf
- 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
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a method for filling fan-shaped radial cemented paste in a gob at the gob side of a gob retained roadway, which comprises material preparation and filling construction, wherein isolation airbags are arranged at a support node to form a gob curtain area, and two adjacent isolation airbags are separated by a support node; the method comprises the following steps that a curtain grouting hole and an inner grouting hole are arranged, the curtain grouting hole is arranged along two sides of a curtain area and is arranged in a fan shape, and the inner grouting hole is arranged in the middle of the curtain area and is arranged in a fan shape; filling materials with slurry concentration of 75% are injected into the curtain grouting holes, and 30% of filling materials are injected into the inner grouting holes, and the fan-shaped distribution form is adopted between each set cycle, so that the strength of the fan-shaped filling areas between two cycles is mutually assisted, the strength of the filling area formed at the joint position of the two cycles is similar to that of the fan-shaped middle filling area, the bearing capacity of the whole fan-shaped filling area formed by the method is equal, the overlying rock of the goaf is uniformly borne, and the overall subsidence of the earth surface is slowed down.
Description
Technical Field
The invention relates to the technical field of underground goaf filling and mining, in particular to a fan-shaped radial cemented paste filling method for a goaf at a gob-side entry retaining side.
Background
At present, the traditional goaf filling material is pure cement grouting or double-liquid grouting, cement has a large proportion, more cement needs to be consumed, the cost is high, and in addition, the goaf filling part has high strength due to the large specific gravity of the cement, so that the ground surface subsidence is uneven. The strength of the common goaf treatment is more than 0.5MPa, and is equivalent to the strength of the surrounding coal rock mass, and unnecessary waste is caused by no high-strength filling. The mining filling cost is greatly reduced due to the paste filling, and the roof contact performance and the integrity of the filling body are good, so that the ground pressure can be effectively controlled, and the safety level of mining activities is improved; at present, paste filling mining provides a safe and efficient way for mining mineral resources with the characteristics of deep burial, roof breaking and the like, and has the advantages of unique technology economy, environmental protection and safety. Therefore, aiming at the problems, the invention provides a fan-shaped radial cemented paste filling method for a gob-side entry retaining side goaf, which is a method for filling an in-situ goaf by taking waste rocks of a deep mine as a base material and cementing a high-water material into paste.
Disclosure of Invention
The invention provides a method for filling a sector radial cemented paste in a gob side gob of a gob side entry retaining side, which aims to ensure that the bearing capacity of a filling area is equal, gob overlying strata are uniformly loaded, and the bearing strength of the gob is equivalent to that of surrounding rock masses.
A method for filling a fan-shaped radial cemented paste in a gob-side gob, which comprises the following steps:
step 4, arranging curtain grouting holes and inner grouting holes in the goaf curtain area, wherein the curtain grouting holes are arranged along two sides of the goaf curtain area and are arranged in a fan shape, and the inner grouting holes are arranged in the middle of the goaf curtain area and are arranged in a fan shape;
step 5, filling materials with slurry concentration of 75% are injected into the curtain grouting holes, after slurry in the curtain grouting holes is solidified, filling materials with slurry concentration of 30% are injected into the inner grouting holes, and filling of a roadside filling body is finished;
step 6, repeating the steps 4-5 to complete a gob-side filling cycle;
and 7, repeating the steps 3-6 to finish the gob side filling along the gob entry.
Further, the preparation method of the filling material in the step 1 comprises the following steps:
11, after the mined raw coal is sorted by an underground sorting system, the sorted gangue is crushed into two coarse and fine aggregates with the grain sizes of 8mm and not more than 3mm by using a jaw crusher;
and step 12, mixing the high-water-content material with the gangue aggregate with the particle size of 8mm to obtain the filling material with the slurry concentration of 75%, and mixing the high-water-content material with the gangue aggregate with the particle size of not more than 3mm to obtain the filling material with the slurry concentration of 30%.
Further, in the step 4, the aperture of the curtain grouting hole is 120mm, the grouting diffusion radius is 5-10m, and the hole spacing is 8 m; the aperture of the inner grouting holes is 100mm, the grouting diffusion radius is 15-20m, and the hole distance between adjacent inner grouting holes is 20 m.
Further, in step 5, after grouting and filling are carried out at the curtain grouting hole, a conical or trapezoidal filling area is formed.
Assuming that the working face length is L, the method aims to completely fill the goaf, and only aims at describing the detailed filling method of the L/2 goaf on the gob-side entry retaining side in order to highlight the side key point of the method; the filling mode of the non-gob-side entry retaining side can adopt a conventional goaf filling method or the fan-shaped radial filling method.
Has the advantages that: the invention aims to equalize the whole bearing capacity of the goaf and simultaneously consider the economic benefit and the cost benefit, and the goaf is filled with the interval fan-shaped grouting. It is worth to be noted that, in each cycle set in the invention, due to the fan-shaped distribution form, the fan-shaped grouting filling areas between the two cycles have a strong and weak mutual assistance effect, so that the filling areas formed at the joint positions of the two cycles are similar to the fan-shaped middle filling area in strength, and finally, the whole fan-shaped filling areas formed in the invention have equal bearing capacity, uniformly bear overlying rocks of the goaf and slow down the overall subsidence of the earth surface.
Drawings
FIG. 1 is a global view of the goaf sector radial filling method of the present invention;
FIG. 2 is a schematic view of the goaf filling and forming effect of the present invention;
FIG. 3 is a layout view of sector radial grouting holes in a goaf;
FIG. 4 is a diagram illustrating the effect of performing the grouting of the curtain grouting holes.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the preferred embodiment of the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention.
The embodiments of the invention will be further described with reference to the accompanying drawings in which:
(1) and a preparation stage:
firstly, separating mined raw coal by an underground separation system, and crushing separated gangue into coarse and fine aggregates with particle sizes of 8mm and not more than 3mm by using a jaw crusher.
Secondly, mixing the high-water material with two kinds of thick and thin aggregates with the particle size of 8mm and not more than 3mm after crushing, and stirring and mixing to obtain filling materials with slurry concentration of 75% and 30%.
(2) And a concrete filling step:
firstly, assuming that the working face is L in length, the invention aims to completely fill the goaf, and in order to highlight the side key point of the invention, the detailed filling method is only described for the L/2 goaf along the gob-side entry retaining side, and the filling of the non-goaf side is not considered temporarily.
From the working face opening and cutting, three roadside filling bodies 3 are planned to be erected as a goaf filling circulation;
thirdly, calculating and determining corresponding support nodes according to the filling area of the L/2 goaf at the gob-side entry retaining side, and arranging isolation airbags at the corresponding support nodes along with the operation process of the coal cutter on the working face along the coal seam inclination to form a fixed-point goaf curtain area;
and fourthly, arranging curtain grouting holes and internal grouting holes in the goaf curtain area, respectively filling and grouting filling materials with slurry concentration of 75% and 30% into corresponding curtain grouting holes 1 and internal grouting holes 2 according to two determined grouting hole positions shown in the figure 3, wherein the curtain grouting holes are arranged along two sides of the goaf curtain area and are arranged in a fan shape, the aperture of each curtain grouting hole is 120mm, the grouting diffusion radius is 5-10m, the hole spacing is 8m, the internal grouting holes are arranged in the middle of the goaf curtain area and are arranged in a fan shape, the aperture of each internal grouting hole is 100mm, the grouting diffusion radius is 15-20m, and the hole spacing between every two adjacent internal grouting holes is 20 m. Wherein, the inner grouting holes are filled by grouting with slurry concentration of 30 percent, and the curtain grouting holes are filled by grouting with slurry concentration of 75 percent;
after grouting and filling the curtain grouting holes, a conical or trapezoidal filling area shown in figure 4 can be formed, and a certain bearing isolation wall is formed at the boundary of the curtain area formed by the isolation air bag;
after slurry in the curtain grouting hole is solidified, slurry with high fluidity is filled in the inner grouting hole, and a goaf filling area as shown in figure 2 is finally formed, so that the strong and weak mutual effect of the goaf filling area is achieved;
and seventhly, in order to enable the whole bearing capacity of the goaf to be equal and consider economic and cost benefits, the goaf is filled with interval fan-shaped grouting. It is worth to be noted that, in each cycle set in the invention, due to the fan-shaped distribution form, the fan-shaped grouting filling areas between the two cycles have a strong and weak mutual assistance effect, so that the filling areas formed at the joint positions of the two cycles are similar to the fan-shaped middle filling area in strength, and finally, the whole fan-shaped filling areas formed in the invention have equal bearing capacity, uniformly bear overlying rocks of the goaf and slow down the overall subsidence of the earth surface.
The sealing area formed in fig. 2 is filled with slurry, and the deeper the blackness is, the stronger the characteristic strength is.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.
Claims (3)
1. A method for filling a fan-shaped radial cemented paste in a gob-side gob-side is characterized by comprising the following steps:
step 1, preparing two filling materials with slurry concentration of 30% and 75%;
step 2, determining the position of a roadside filling body at the gob-side entry retaining side from the beginning of opening the working face, and setting three roadside filling bodies as a gob-side goaf filling circulation at the gob-side entry retaining side;
step 3, calculating and determining the position of a bracket node corresponding to a working surface bracket in a gob filling cycle on the gob side according to the gob with the length of one half of the working surface on the gob side, wherein each isolation air bag is arranged at each corresponding determined bracket node to form a fixed-point gob curtain region, and a bracket node is arranged between two adjacent isolation air bags;
step 4, arranging curtain grouting holes and inner grouting holes in the goaf curtain area, wherein the curtain grouting holes are arranged along two sides of the goaf curtain area and are arranged in a fan shape, and the inner grouting holes are arranged in the middle of the goaf curtain area and are arranged in a fan shape;
step 5, filling materials with slurry concentration of 75% are injected into the curtain grouting holes, after slurry in the curtain grouting holes is solidified, filling materials with slurry concentration of 30% are injected into the inner grouting holes, and filling of a roadside filling body is finished;
step 6, repeating the steps 4-5 to complete a gob-side filling cycle;
7, repeating the steps 3-6 to finish the gob side filling along the gob entry;
the preparation method of the filling material in the step 1 comprises the following steps:
11, after the mined raw coal is sorted by an underground sorting system, the sorted gangue is crushed into two coarse and fine aggregates with the grain sizes of 8mm and not more than 3mm by using a jaw crusher;
and step 12, mixing the high-water-content material with the gangue aggregate with the particle size of 8mm to obtain the filling material with the slurry concentration of 75%, and mixing the high-water-content material with the gangue aggregate with the particle size of not more than 3mm to obtain the filling material with the slurry concentration of 30%.
2. The method for filling the fan-shaped radial cemented paste in the gob-side entry retaining side goaf according to claim 1, wherein in step 4, the diameter of the curtain grouting hole is 120mm, the grouting diffusion radius is 5-10m, and the hole spacing is 8 m; the aperture of the inner grouting holes is 100mm, the grouting diffusion radius is 15-20m, and the hole distance between adjacent inner grouting holes is 20 m.
3. The method for filling the fan-shaped radial cemented paste in the gob-side entry retaining side goaf according to claim 1, wherein in step 5, after grouting at the curtain grouting hole, a conical or trapezoidal filling area is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110581705.7A CN113266418B (en) | 2021-05-24 | 2021-05-24 | Method for filling fan-shaped radial cemented paste in gob-side entry retaining side goaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110581705.7A CN113266418B (en) | 2021-05-24 | 2021-05-24 | Method for filling fan-shaped radial cemented paste in gob-side entry retaining side goaf |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113266418A CN113266418A (en) | 2021-08-17 |
| CN113266418B true CN113266418B (en) | 2022-04-15 |
Family
ID=77233030
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110581705.7A Active CN113266418B (en) | 2021-05-24 | 2021-05-24 | Method for filling fan-shaped radial cemented paste in gob-side entry retaining side goaf |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113266418B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS217356B1 (en) * | 1980-11-10 | 1983-01-28 | Antonin Mira | Curtain filling wall for advancing supports |
| CN102409997A (en) * | 2011-12-09 | 2012-04-11 | 中国矿业大学 | Curtain grouting anti-burst method for cutting through coal and gas bursting seam in shaft |
| CN102852552A (en) * | 2012-09-17 | 2013-01-02 | 扬州中矿建筑新材料科技有限公司 | High-water material filling column and construction method thereof |
| CN109899109A (en) * | 2019-04-04 | 2019-06-18 | 中国矿业大学(北京) | The grouting filling method in irregular goaf |
-
2021
- 2021-05-24 CN CN202110581705.7A patent/CN113266418B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CS217356B1 (en) * | 1980-11-10 | 1983-01-28 | Antonin Mira | Curtain filling wall for advancing supports |
| CN102409997A (en) * | 2011-12-09 | 2012-04-11 | 中国矿业大学 | Curtain grouting anti-burst method for cutting through coal and gas bursting seam in shaft |
| CN102852552A (en) * | 2012-09-17 | 2013-01-02 | 扬州中矿建筑新材料科技有限公司 | High-water material filling column and construction method thereof |
| CN109899109A (en) * | 2019-04-04 | 2019-06-18 | 中国矿业大学(北京) | The grouting filling method in irregular goaf |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113266418A (en) | 2021-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106869931B (en) | A kind of barren rock and cementing layering wedging mining with stowing technique and its structure | |
| CN106223958B (en) | The slant middle thick orebody subregion rock drilling stage falls ore deposit afterwards filling collaboration mining codes | |
| CN103590831B (en) | A kind of gentle dip is thin-the novel mining methods of middle thickness orebody | |
| CN206571487U (en) | A kind of barren rock and cementing layering wedging mining with stowing structure | |
| CN105041314A (en) | Method for united mining of deep subsequent stoping chamber and layered stoping jamb | |
| CN111608726A (en) | Method for reducing damage of spaced overlying rock crushed-expansion filling steel reinforcement cage bag by grouting | |
| CN105649631A (en) | Efficient mechanical mining method for gently-inclined thin ore bodies | |
| CN102168579A (en) | Rib-pillar-free continuous sublevel filling method for mining preparation in medium-thickness slope crushed ore body vein | |
| CN112360462A (en) | Mining process for filling and grouting short-wall fully-mechanized mining gangue | |
| CN104847406B (en) | Method for fracturing retained filled wall of adjacent coal face | |
| CN103437768B (en) | Pre-set space filling mining method without top column and bottom column | |
| CN107893658A (en) | Big thick ore body stage open stope afterwards filling mining methods in pole under strong ground pressure ring border | |
| CN112377196B (en) | Underground mining method for steeply inclined thin ore body with broken ore body and surrounding rock | |
| CN107829739B (en) | Mining method of steeply inclined thin vein | |
| CN105507947B (en) | A kind of networking waste filling method | |
| WO2022247176A1 (en) | Filling caving mining method | |
| CN103590851A (en) | Underground waste-rock concrete preparation, pumping and filling system and method | |
| CN104989408A (en) | Safe and high-efficiency mining method for metal mine in mountainous area | |
| CN201982137U (en) | Underground preparation device taking waste rock as aggregate concrete filling material | |
| CN114622953B (en) | Coal mine gangue and CO 2 Mining overburden rock isolation grouting filling emission reduction method | |
| CN109899070B (en) | Slow-inclination medium-thickness ore body solid-waste-free filling mining method based on ellipsoid ore drawing structure | |
| CN105863727B (en) | Method for treating pillar goaf | |
| CN113266418B (en) | Method for filling fan-shaped radial cemented paste in gob-side entry retaining side goaf | |
| CN203614129U (en) | Underground waste rock concrete preparation, pumping and filling system | |
| CN211587914U (en) | Shield debris recycling system |
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 |