CN108468564B - Near-horizontal coal seam roadway type cemented filling method - Google Patents
Near-horizontal coal seam roadway type cemented filling method Download PDFInfo
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- CN108468564B CN108468564B CN201810200934.8A CN201810200934A CN108468564B CN 108468564 B CN108468564 B CN 108468564B CN 201810200934 A CN201810200934 A CN 201810200934A CN 108468564 B CN108468564 B CN 108468564B
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- 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
- E21F15/08—Filling-up hydraulically or pneumatically
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- 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
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- 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
- E21F17/02—Suspension devices for tubes or the like, e.g. for ventilating ducts
Abstract
The invention discloses a near-horizontal coal seam roadway type cementing filling method which is characterized by comprising the following steps of: 1) forming a filling roadway after mining a nearly horizontal coal seam by utilizing a roadway mining technology, chiseling a filling pipeline hole in a top plate of the filling roadway, and arranging a filling pipe in the filling pipeline hole; 2) constructing a sealing retaining wall at the end of the filling roadway and inside the filling roadway to divide the sealing retaining wall into a plurality of sections of filling sealing spaces; 3) excavating a roof chamber at a roof at an intermediate location of each of said sections of packed containment; 4) arranging ventilation pipes along the bottom surface of the top plate of the filling roadway; 5) and filling the filling roadway by using a cemented filling technology. The invention achieves the following beneficial effects: the method is applied to the tunnel type cemented filling process of the nearly horizontal coal seam, can greatly improve the filling and roof-contacting rate of the nearly horizontal coal seam, and effectively solves the problems that a filling body cannot contact the roof and the filling compactness is not high due to bleeding shrinkage of a colloid filling material.
Description
Technical Field
The invention relates to a near-horizontal coal seam roadway type cemented filling method, and belongs to the technical field of coal seam filling and recycling.
Background
Western coal resources in China are rich, medium and small coal mines in western mining areas occupy a large proportion, and a roadway mining method is mostly adopted for the medium and small coal mines due to factors such as backward mining technology and mining equipment, so that a large amount of strip coal pillars are left in a goaf. In order to avoid great waste of lane type left-over coal pillars and disasters such as mine earthquake, surface subsidence and the like caused by instability of the coal pillars in the goaf, the lane type cemented filling coal mining technology is widely applied to the coal mines.
The traditional lane type cementing, filling and coal mining technology is generally applied to inclined coal seams and has poor application effect in nearly horizontal coal seams. Because the inclination angle of the nearly horizontal coal seam is small, the cemented filling material is difficult to fill the goaf under the condition of gravity flow, and effective roof contact cannot be achieved. How to improve the roof contact rate in the near-horizontal coal seam roadway cementing filling process becomes a great difficult problem to be solved urgently.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to provide a near-horizontal coal seam lane type cemented filling method, so as to further improve the roof contact rate of filling materials during near-horizontal coal seam lane type cemented filling and better control the movement of overlying strata.
In order to achieve the above object, the present invention adopts the following technical solutions:
A near-horizontal coal seam roadway type cementing and filling method is characterized by comprising the following steps:
1) Forming a filling roadway after mining a nearly horizontal coal seam by utilizing a roadway mining technology, chiseling a filling pipeline hole in a top plate of the filling roadway, and arranging a filling pipe in the filling pipeline hole;
2) Constructing a sealed retaining wall at the end head and inside the filling roadway, and dividing the filling roadway into a plurality of sections of filling sealed spaces;
3) A top chamber is drilled at the top plate of the middle position of each section of filling sealed space, and the top of the chamber is communicated with the filling pipeline hole;
4) Arranging ventilation pipes along the bottom surface of the top plate of the filling roadway; one end of the ventilating pipe is bent upwards and positioned in the chamber, and one end of the filling pipe is bent downwards and positioned in the chamber;
5) And filling the filling roadways by using a cemented filling technology, wherein the adjacent three filling roadways are a group, and sequentially filling each section of filling sealed space in the three filling roadways to a compact roof until the cemented filling operation of the whole group of filling roadways is completed.
The nearly horizontal coal seam roadway type cemented filling method is characterized in that the path of the filling pipeline hole in the step 1) is an inclined section on one side of the filling roadway air return roadway, and the length of the inclined section is determined by factors such as the width of the air return roadway, the pressure intensity in the filling pipe, the characteristics of the cemented filling material, the distance between the filling pipeline hole and the coal seam and the like.
The near-horizontal coal seam roadway type cemented filling method is characterized in that the filling flow of three adjacent filling roadways in the step 5) is as follows:
51) Filling the unfilled filling sealed space at the innermost layer of the filling roadway, wherein cemented filling materials flow from the top chamber to the unfilled filling sealed space at the innermost layer along the filling pipe, and when colloid filling materials flow out from the pipe orifice of the ventilation pipe, the filling is finished, and then the unfilled filling sealed spaces at the innermost layer of the adjacent filling roadway are sequentially filled;
52) Repeating the step 51) to sequentially fill the just filled filling sealed space for 2 times;
53) And repeating the steps 51) to 52) until the cement filling operation of the three adjacent filling roadways is completed.
The near-horizontal coal seam roadway type cemented filling method is characterized in that in the step 4), the height of the port of the ventilation pipe is lower than that of the port of the filling pipe in the chamber.
The invention achieves the following beneficial effects: the method is applied to the nearly horizontal coal seam roadway type cemented filling process, and the filling pipe is arranged in the top plate, so that the filling roadway is segmented to carry out multiple times of cemented filling operation, the filling roof-contacting rate of the nearly horizontal coal seam can be greatly improved, and the problems that a filling body cannot be in roof-contacting, the filling compactness is low and the like caused by bleeding shrinkage of a colloid filling material are effectively solved. The whole filling method is convenient to use, safe, reliable and strong in adaptability, and has wide adaptability and field applicability in near-horizontal coal seam roadway type cementing filling.
Drawings
FIG. 1 is a schematic front view of the structure of the present method;
FIG. 2 is a schematic top view of the structure of the present method;
FIG. 3 is a sectional view I-I of the front view of the structure of the method;
The meaning of the reference symbols in the figures:
1-return air drift, 2-transport drift, 3-filling drift, 4-sealed retaining wall, 5-filled sealed space, 6-top plate, 7-filled pipeline hole, 8-filled pipe, 9-top chamber, 10-ventilation pipe, 1-1, 1-2, 1-3, 2-1, 2-2, 2-3, 3-1, 3-2 and 3-3-filled sealed space.
Detailed Description
The invention is further described below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
As shown in fig. 1 to 3, in the method, a filling roadway 3 is formed by mining coal in a near-horizontal coal seam by using a roadway mining technology, and sealed retaining walls 4 are constructed at two ends of the filling roadway and in the filling roadway 3 at certain intervals, so that the filling roadway 3 is divided into three sections of roadway filling sealed spaces 5.
From one side of the return air gallery 1, a filling pipeline hole 7 is drilled in a filling gallery top plate 6 to be above the filling sealed space 5, and a filling pipe 8 is installed in the filling pipeline hole 7.
A roof chamber 9 is bored at a roof 6 at a middle position of the filling seal space 5, and a nozzle of a filling pipe 8 is disposed at an upper position of the roof chamber 9 and bent downward.
A small hole is left in the sealed retaining wall 4 near the top plate, from which a ventilation pipe 10 is arranged along the top plate to the top chamber 9, and the orifice of the ventilation pipe 10 is bent upward at a position lower than the top chamber 9.
The horizontal height of the orifice of the filling pipe 8 in the top chamber 9 is higher than that of the ventilation pipe-10.
When filling operation is carried out, every three adjacent filling roadways 3 are in a group (according to engineering practical experience and time spent in each process, three groups are finally determined as one group, but if other groups are possible, only 3 groups have the best effect), firstly, cementing filling is carried out on the filling sealed space 1-1 in the roadway, cementing filling materials flow into the filling sealed space 1-1 through the top chamber 9 along the filling pipe 8, when the cementing filling materials flow out from the ventilation pipe 10, the filling is finished, and then, cementing filling is carried out on the filling sealed spaces 2-1 and 3-1 in the roadway in sequence.
When the filling of the sealing spaces 1-1, 2-1 and 3-1 in the lane is finished, the filling pipe at the innermost layer is discarded, and when the filling of the sealing spaces 1-2, 2-2 and 3-2 in the lane is finished, the filling pipe 8 is cut off in the top chamber 9, and the outlet of the filling pipe is reinstalled for the filling operation of the sealing spaces 1-2, 2-2 and 3-2 in the lane. The filling operation of filling the sealed spaces 1-2, 1-3, 2-2, 2-3, 3-2 and 3-3 in the lane is the same as the above, and ventilation pipes are required to be installed.
And repeating the above processes to carry out cementing filling on the filling sealed spaces 1-1, 2-1 and 3-1 for two times again to ensure that the filling bodies in the filling sealed spaces 5 in the three roadways are closely connected to the top, so as to prevent the filling bodies from being not closely packed due to the bleeding shrinkage of the colloid filling material, and repeating the above filling steps to carry out filling operation on the filling sealed spaces 1-2, 2-2, 3-2, 1-3, 2-3 and 3-3 in the roadways until the filling operation of the three adjacent filling roadways 3 is completed.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (1)
1. A near-horizontal coal seam roadway type cementing and filling method is characterized by comprising the following steps:
1) Forming a filling roadway after mining a nearly horizontal coal seam by utilizing a roadway mining technology, chiseling a filling pipeline hole in a top plate of the filling roadway, and arranging a filling pipe in the filling pipeline hole;
2) Constructing a sealed retaining wall at the end head and inside the filling roadway, and dividing the filling roadway into a plurality of sections of filling sealed spaces;
3) A top chamber is drilled at the top plate of the middle position of each section of filling sealed space, and the top of the chamber is communicated with the filling pipeline hole;
4) Arranging ventilation pipes along the bottom surface of the top plate of the filling roadway; one end of the ventilating pipe is bent upwards and positioned in the chamber, and one end of the filling pipe is bent downwards and positioned in the chamber;
5) Filling the filling roadways by using a cemented filling technology, wherein each adjacent three filling roadways form a group, and sequentially filling each section of filling sealed space in the three filling roadways to a compact roof until the cemented filling operation of the whole group of filling roadways is completed; the path of the filling pipeline hole in the step 1) is an inclined section at one side of the return air drift of the filling roadway, and the length of the inclined section is determined by factors such as the width of the return air drift, the pressure intensity in the filling pipe, the self characteristic of the cemented filling material and the distance between the filling pipeline hole and the coal seam according to empirical values;
In the step 4), the port height of the ventilation pipe is lower than that of the filling pipe in the chamber;
The filling process of the adjacent three filling roadways in the step 5) is as follows:
51) Filling the unfilled filling sealed space at the innermost layer of the filling roadway, wherein cemented filling materials flow from the top chamber to the unfilled filling sealed space at the innermost layer along the filling pipe, and when colloid filling materials flow out from the pipe orifice of the ventilation pipe, the filling is finished, and then the unfilled filling sealed spaces at the innermost layer of the adjacent filling roadway are sequentially filled;
52) Repeating the step 51) to sequentially fill the just filled filling sealed space for 2 times;
53) And repeating the steps 51) to 52) until the cement filling operation of the three adjacent filling roadways is completed.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200934.8A CN108468564B (en) | 2018-03-12 | 2018-03-12 | Near-horizontal coal seam roadway type cemented filling method |
| PCT/CN2018/102418 WO2019174188A1 (en) | 2018-03-12 | 2018-08-27 | Roadway-type cementing filling method for nearly-horizontal coal seam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810200934.8A CN108468564B (en) | 2018-03-12 | 2018-03-12 | Near-horizontal coal seam roadway type cemented filling method |
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| CN108468564A CN108468564A (en) | 2018-08-31 |
| CN108468564B true CN108468564B (en) | 2020-07-17 |
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| CN201810200934.8A Active CN108468564B (en) | 2018-03-12 | 2018-03-12 | Near-horizontal coal seam roadway type cemented filling method |
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| CN (1) | CN108468564B (en) |
| WO (1) | WO2019174188A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108468564B (en) * | 2018-03-12 | 2020-07-17 | 中国矿业大学 | Near-horizontal coal seam roadway type cemented filling method |
| CN109882173A (en) * | 2019-04-30 | 2019-06-14 | 长沙有色冶金设计研究院有限公司 | Big thick ore body vertically Two step mining stope filling system and placement method |
| CN112253115B (en) * | 2020-10-14 | 2023-06-16 | 中国矿业大学(北京) | Near-horizontal coal seam roadway type cemented filling mining method |
| CN114961844A (en) * | 2022-06-17 | 2022-08-30 | 中南大学 | Method for improving large-section drift filling mining efficiency and roof contact rate |
| CN117514329B (en) * | 2024-01-05 | 2024-03-19 | 中煤科工能源科技发展有限公司 | Mining cave filling method |
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| SU756043A1 (en) * | 1978-07-04 | 1980-08-15 | Inst Gornogo Dela An Kazakhsk | Method of filling-up underground working |
| US4463807A (en) * | 1981-06-15 | 1984-08-07 | In Situ Technology, Inc. | Minimizing subsidence effects during production of coal in situ |
| FR2573475B1 (en) * | 1984-11-16 | 1987-10-16 | Soletanche | NEW PROCESS FOR THE EXPLOITATION OF ORE DEPOSITS |
| CN103046955A (en) * | 2012-12-24 | 2013-04-17 | 河北钢铁集团矿业有限公司 | Large-range goaf group filling method |
| CN103527200B (en) * | 2013-10-25 | 2015-12-09 | 河北省矾山磷矿有限公司 | Bottom-column-free sectional Rhombic room afterwards filling mining method |
| CN103758567B (en) * | 2014-01-26 | 2016-02-03 | 山东科技大学 | A kind of breaking roof Collapsed zone grouting filling method |
| CN103821558B (en) * | 2014-02-14 | 2016-02-24 | 安徽理工大学 | Coal mine gob filling mining and gob side entry retaining filling process |
| CN103821515B (en) * | 2014-02-20 | 2016-05-04 | 山西晋煤集团技术研究院有限责任公司 | A kind of double face filling coal mining technique |
| CN104453904B (en) * | 2014-11-24 | 2017-01-11 | 西北矿冶研究院 | Sublevel filling mining method without drawing groove |
| CN104532818A (en) * | 2014-12-02 | 2015-04-22 | 辽宁工程技术大学 | Treatment method for strip mine goaf |
| CN204716289U (en) * | 2015-06-29 | 2015-10-21 | 云南驰宏锌锗股份有限公司 | The on-site control device of Tight filling in a kind of closed partition wall |
| CN106050300B (en) * | 2016-07-07 | 2017-12-01 | 山东黄金矿业(莱州)有限公司焦家金矿 | A kind of Tight filling method for owing to adopt to route superelevation on |
| CN108468564B (en) * | 2018-03-12 | 2020-07-17 | 中国矿业大学 | Near-horizontal coal seam roadway type cemented filling method |
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- 2018-03-12 CN CN201810200934.8A patent/CN108468564B/en active Active
- 2018-08-27 WO PCT/CN2018/102418 patent/WO2019174188A1/en active Application Filing
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| WO2019174188A1 (en) | 2019-09-19 |
| CN108468564A (en) | 2018-08-31 |
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