CN112682098A - Large vertical-depth large-aperture coal gangue feeding hole and construction method thereof - Google Patents
Large vertical-depth large-aperture coal gangue feeding hole and construction method thereof Download PDFInfo
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Abstract
The invention relates to a large vertical-depth large-aperture coal gangue feeding hole and a construction method thereof, wherein the large vertical-depth large-aperture coal gangue feeding hole comprises a feeding pipe, a through-the-sky spiral pipe and a wellhead pipe which are sequentially distributed from inside to outside, wherein the aperture of the wellhead pipe is 1020mm, the wall thickness is 12mm, and the length range is X1m, is arranged underground 0-X1Position of m, X1In the range of 9-11 m; the hollow spiral tube has a hole diameter of 850mm, a wall thickness of 12mm and a length of X2m, setting up0-X underground2m, wherein the bottom end of the Tongtian spiral pipe enters the bedrock by 3-5m and is positioned inside the wellhead pipe; a feeding pipe with a 586mm aperture, a 50mm wall thickness and an X length3m, is arranged underground 0-X3m, the distance from the bottom end of the feeding pipe to the coal seam is X4m，X4In the range of 30-50 m. The invention has the advantages of high automation degree of gangue transportation, high efficiency, simple process and less required posts.
Description
Technical Field
The invention relates to the field of mining area environment protection, in particular to a large vertical depth and large aperture coal gangue feeding hole and a construction method thereof.
Background
At present, most of coal mine waste filling mining in China still adopts an underground waste rock on-site transportation filling mode, and a few of coal mine waste rocks adopt ground waste rock feeding to enter a well to fill and mine, so that the coal mine waste filling mining method has the characteristics of small mine depth, simpler feeding condition and the like.
The well of the Dong mine is deep, the design depth of the feeding holes of the Dong mine is 771 meters, the method has the advantages of being high in gangue feeding speed, easy to block the holes, severe in gangue friction on the feeding holes and the like, engineering experience (615 meters in Tangshan mine and 450 meters in Chen Tai mine) with similar depth does not exist in the range of China, requirements on setting precision and welding process are high, hoisting weight is large, special buffering devices and facilities are needed, and the method has great creativity and challenges.
Disclosure of Invention
In view of the above problems, the present invention is proposed to provide a large vertical depth large aperture coal gangue charging hole and a construction method thereof, which overcome the above problems or at least partially solve the above problems.
According to a first aspect, the large-vertical-depth large-aperture coal gangue feeding hole comprises a feeding pipe, a through-the-sky spiral pipe and a wellhead pipe which are sequentially distributed from inside to outside, wherein the wellhead pipe is 1020mm in aperture, 12mm in wall thickness and X in length range1m, is arranged underground 0-X1Position of m, X1In the range of 9-11 m; the hollow spiral tube has a hole diameter of 850mm, a wall thickness of 12mm and a length of X2m, is arranged underground 0-X2m, wherein the bottom end of the Tongtian spiral pipe enters the bedrock by 3-5m and is positioned inside the wellhead pipe; a feeding pipe with a 586mm aperture, a 50mm wall thickness and an X length3m, is arranged underground 0-X3m, the distance from the bottom end of the feeding pipe to the coal seam is X4m，X4In the range of 30-50 m.
In one possible embodiment, the gangue buffer bin is arranged from the bottom end of the feeding pipe to the rock stratum between the coal seams.
In one possible embodiment, the length of the wellhead tubing is 10 m.
In one possible embodiment, the length of the sunrise coil is 245 m.
In a possible embodiment the length of the feeding tube is 771 m.
According to a second aspect, the construction method of the large vertical depth and large aperture coal gangue feeding hole in the first aspect is provided, and the method comprises the step S1 of firstly constructing a guide hole with a small aperture and drilling a hole to a coal seam by using a wireless drilling inclinometer, a screw directional drilling tool and a phi 216mm drill bit to ensure that the hole bottom displacement meets the design requirement;
step S2, conventional physical logging is carried out to obtain geological data;
step S3, reaming to the hole depth X by using a phi 510mm combined roller bit5m, wherein X5And X3The difference range of (a) is 1-3 m;
step S4, using phi 1100mm combined toothReaming of wheel/PDC composite sheet drill bit to hole depth X1m；
Step S5, adding phi 1020mm, the wall thickness is 12mm, and the length is X1m of wellhead tubing;
step S6, solidifying the pipe with cement and waiting for solidification;
step S7, reaming to the hole depth X by using a phi 980mm combined roller bit2m, simultaneously adopting drill bits with phi 510mm and phi 216mm to carry out through holes;
step S8, adding phi 980mm, the wall thickness is 14mm, and the length is X2m of all-weather spiral pipes, wherein the bottom ends of all-weather spiral pipes enter bedrocks by 3-5 m;
step S9, solidifying the pipe with cement and waiting for solidification; performing a water pressing test to check the quality of the fixed pipe;
step S10, reaming to the hole depth X by using a phi 860mm combined cone/PDC composite sheet drill bit5m, simultaneously adopting drill bits with phi 510mm and phi 216mm to carry out through holes;
step S11, adding phi 586mm with wall thickness of 50mm and length of X3m wear-resistant steel pipes are used as feeding pipes;
and step S12, solidifying the pipe by cement and waiting for solidification.
In a possible implementation, after step S12, the method further includes: and step S13, testing the quality of the cement pipe fixing by ground wellhead pressure test/water pressing, removing residual slurry accumulated water in the hole by using a steel wire rope and a bucket, and checking and accepting the hole.
In one possible embodiment, the feeding pipe in step S12 is a bimetal composite wear-resistant pipe.
In one possible embodiment, the drill bit drills to a hole depth of 810m in step S1.
In one possible embodiment, X5Greater than X3，X5And X3The difference of (a) is 2 m.
The invention has the beneficial effects that: the method has the advantages of high automation degree of gangue transportation, high efficiency, simple process and less required posts.
The foregoing description is only an overview of the technical solutions of the present invention, and the embodiments of the present invention are described below in order to make the technical means of the present invention more clearly understood and to make the above and other objects, features, and advantages of the present invention more clearly understandable.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a large vertical depth large-aperture coal gangue charging hole provided by the embodiment of the invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
The terms "comprises" and "comprising," and any variations thereof, in the present description and claims and drawings are intended to cover a non-exclusive inclusion, such as a list of steps or elements.
The technical solution of the present invention is further described in detail with reference to the accompanying drawings and embodiments.
Referring to fig. 1, an embodiment of the present invention provides a large vertical depth large aperture coal gangue feeding hole, which includes a feeding pipe 3, a through-the-sky spiral pipe 2 and a wellhead pipe 1 that are sequentially distributed from inside to outside:
a wellhead pipe 1 with a hole diameter of 1020mm, a wall thickness of 12mm and a length of X1m, is arranged underground 0-X1Position of m, X1In the range of 9-11 m;
a Tongtian spiral tube 2 with the aperture of 850mm, the wall thickness of 12mm and the length of X2m, is arranged underground 0-X2m ofThe bottom end of the Tongtian spiral pipe 2 enters 3-5m of bedrock and is positioned inside the wellhead pipe 1;
a feeding pipe 3 with the aperture of 586mm, the wall thickness of 50mm and the length of X3m, is arranged underground 0-X3m, the distance range from the bottom end of the feeding pipe 3 to the coal seam is X4m，X4In the range of 30-50 m.
A waste rock buffer bin is arranged between the bottom end of the feeding pipe 3 and a rock stratum between coal beds, and a waste rock buffer device is arranged in a roadway at the upper opening of the bin;
the wellhead pipe 1, the hollow spiral pipe 2 and the feeding pipe 3 are connected through cement pouring.
In one example, the length X of the wellhead tube 11Is 10 m.
In one example, the length X of the weather coil 22In the range of 245m, the total of the components,
in one example, the length X of the feeding tube 33771 m.
In one example, X4Is 40 m.
The invention also provides a construction method of the large vertical depth large-aperture coal gangue feeding hole, which comprises the following steps:
and step S1, in order to ensure that the hole bottom displacement meets the design requirement, a small-aperture construction guide hole is firstly used, and a wireless inclinometer, a screw directional drilling tool and a phi 216mm drill bit are used for drilling to the coal seam.
And step S2, conventional physical logging is carried out to obtain geological data.
Step S3, reaming to the hole depth X by using a phi 510mm combined roller bit5m, wherein X5And X3The difference of (a) is in the range of 1-3 m.
Step S4, reaming to the hole depth X by using a phi 1100mm combined cone/PDC composite sheet drill bit1m。
Step S5, adding phi 1020mm, the wall thickness is 12mm, and the length is X1m of wellhead pipe 1.
And step S6, solidifying the pipe by cement and waiting for solidification.
Step S7, reaming to the hole depth X by using a phi 980mm combined roller bit2m, while using phi 510mmA drill of 216mm diameter.
Step S8, adding phi 980mm, the wall thickness is 14mm, and the length is X2m of the solstice spiral pipe 2, and the bottom end of the solstice spiral pipe 2 enters the bedrock by 3-5 m.
Step S9, solidifying the pipe with cement and waiting for solidification; and performing a water pressing test to check the quality of the fixed pipe.
Step S10, reaming to the hole depth X by using a phi 860mm combined cone/PDC composite sheet drill bit5m (designing the position of the lower pipe), and simultaneously adopting drill bits with phi 510mm and phi 216mm to carry out through holes.
Step S11, adding phi 586mm with wall thickness of 50mm and length of X3m, as a feeding pipe 3.
And step S12, solidifying the pipe by cement and waiting for solidification.
In one example, after step S12, the method further includes:
and step S13, testing the quality of the cement pipe fixing by ground wellhead pressure test/water pressing, removing residual slurry accumulated water in the hole by using a steel wire rope and a bucket, and checking and accepting the hole.
In one example, the feeding pipe 3 in step S12 is a bimetal composite wear resistant pipe.
In one example, in step S1, the drill bit drills to a hole depth of 810 m.
In one example, X5Greater than X3，X5And X3The difference of (a) is 2 m. The reaming depth is several meters greater than the depth of the designed feeding hole because a slurry buoyancy method is adopted for installation, particularly when an abrasion-resistant steel pipe with the thickness of phi 586mm being 50mm is installed, the bottom needs to be plugged by the slurry buoyancy method because the total weight of the mass casing pipe is 535.4559 tons, and the plugging length is 2.0m for an example.
In one example, the X5Is 773 m.
Connecting a sleeve: the welding connection is adopted, so that the welding quality is ensured to have no rosin joint, no air leakage and no sand hole, a welding reinforcing hoop is additionally arranged at the sleeve connection position, the sleeve connection strength is ensured, and the feeding pipe is sunk by adopting a floating method; and (5) stopping water and cementing wells, and adopting 425# cement whole-hole closed pipe fixing.
The application process comprises the following steps: coal washery (hillock) → ground gangue station → large vertical deep large-aperture coal gangue charging hole → buffer device → buffer bin → gangue transporting roadway → working face goaf.
In one example, the feeding hole is a vertical hole, and the verticality is controlled within 1 per thousand.
The invention has the advantages that: the method has the advantages of high automation degree of gangue transportation, high efficiency, simple process and less required posts. The key points are as follows: the design of the feeding hole has the advantages of advancement, scientific and reasonable material selection, scientific and strict construction organization and long service life.
In order to solve the problems in the background technology, when a feeding hole is constructed, an inclinometer and a directional instrument are adopted to monitor the drilling condition and adjust the drilling angle to control the drilling precision, the technical means of carbon dioxide protection welding and a high-precision laser demarcation device (vertical positioning) are adopted to carry out verification and approval, ultrasonic wave is adopted to carry out inspection and the like to ensure the welding quality requirement, the double-crane hoisting, elevator clamping and slurry buoyancy methods are adopted to carry out installation, and a reinforced conical wear-resistant buffer and a bottom sealing pressure regulating facility are specially designed to carry out feeding buffering and speed control. Meanwhile, in order to ensure that the feeding holes are not abraded and can normally serve mine production for a long time, the chendong mine is selectively provided with a bimetal composite wear-resistant pipe in the feeding holes, and the pipe diameter of the pipe is
The wall thickness is 50mm (wearing layer wall thickness is 30mm, outer pipe wall thickness is 20mm), its outer layer is 16 manganese steel, the inside lining is high chromium wear-resisting alloy (KMTBCr28), its pipeline wholly compounds under the high temperature hot cast (welding) state, wearability and toughness organic combination, the performance advantage is complementary, have good scour and wear resistance and pressure-bearing shock resistance, whole performance improves by a wide margin, can be suitable for the serious dry material transport of wearing and tearing.
The above embodiments are provided to further explain the objects, technical solutions and advantages of the present invention in detail, it should be understood that the above embodiments are merely exemplary embodiments of the present invention and are not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. A large vertical depth large-aperture coal gangue feeding hole is characterized by comprising a feeding pipe (3), a through-the-sky spiral pipe (2) and a wellhead pipe (1) which are sequentially distributed from inside to outside;
wherein the aperture of the wellhead pipe (1) is 1020mm, the wall thickness is 12mm, and the length range is X1m, is arranged underground 0-X1Position of m, X1In the range of 9-11 m;
the diameter of the through-the-sky spiral pipe (2) is 850mm, the wall thickness is 12mm, and the length is X2m, is arranged underground 0-X2m, wherein the bottom end of the Tongtian spiral pipe (2) enters 3-5m of bedrock and is positioned inside the wellhead pipe (1);
a feeding pipe (3) with the aperture of 586mm, the wall thickness of 50mm and the length of X3m, is arranged underground 0-X3m, the distance range from the bottom end of the feeding pipe (3) to the coal seam is X4m，X4In the range of 30-50 m.
2. The large vertical depth large aperture coal gangue feeding hole as claimed in claim 1, wherein a gangue surge bin is arranged from the bottom end of the feeding pipe (3) to the rock stratum between the coal seams.
3. The large vertical depth large aperture coal gangue charging hole as defined in claim 1, wherein the length of the wellhead pipe (1) is 10 m.
4. The large vertical depth large aperture coal gangue charging hole as claimed in claim 1, wherein the length of the sky-passing spiral pipe (2) is 245 m.
5. The large vertical depth large aperture coal gangue feeding hole as defined in claim 1, wherein the length of the feeding pipe (3) is 771 m.
6. The construction method of the large vertical depth large-aperture coal gangue charging hole as defined in any one of claims 1 to 5, characterized by comprising the following steps:
step S1, in order to ensure that the hole bottom displacement meets the design requirement, a small-aperture construction pilot hole is firstly used, and a wireless inclinometer, a screw directional drilling tool and a phi 216mm drill bit are used for drilling to the coal seam;
step S2, conventional physical logging is carried out to obtain geological data;
step S3, reaming to the hole depth X by using a phi 510mm combined roller bit5m, wherein X5And X3The difference range of (a) is 1-3 m;
step S4, reaming to the hole depth X by using a phi 1100mm combined cone/PDC composite sheet drill bit1m；
Step S5, adding phi 1020mm, the wall thickness is 12mm, and the length is X1m of wellhead pipes (1);
step S6, solidifying the pipe with cement and waiting for solidification;
step S7, reaming to the hole depth X by using a phi 980mm combined roller bit2m, simultaneously adopting drill bits with phi 510mm and phi 216mm to carry out through holes;
step S8, adding phi 980mm, the wall thickness is 14mm, and the length is X2m of all-weather spiral pipe (2), wherein the bottom end of the all-weather spiral pipe (2) enters the bedrock by 3-5 m;
step S9, solidifying the pipe with cement and waiting for solidification; performing a water pressing test to check the quality of the fixed pipe;
step S10, reaming to the hole depth X by using a phi 860mm combined cone/PDC composite sheet drill bit5m, simultaneously adopting drill bits with phi 510mm and phi 216mm to carry out through holes;
step S11, adding phi 586mm with wall thickness of 50mm and length of X3m wear-resistant steel pipes are used as feeding pipes (3);
and step S12, solidifying the pipe by cement and waiting for solidification.
7. The construction method according to claim 6, further comprising, after step S12:
and step S13, testing the quality of the cement pipe fixing by ground wellhead pressure test/water pressing, removing residual slurry accumulated water in the hole by using a steel wire rope and a bucket, and checking and accepting the hole.
8. Construction method according to claim 6, characterized in that the feeding pipe (3) in step S12 is a bimetal composite wear-resistant pipe.
9. The construction method according to claim 6, wherein the drill is drilled to a hole depth of 810m in step S1.
10. Construction method according to claim 6, characterised in that X5Greater than X3，X5And X3The difference of (a) is 2 m.
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| CN202011578109.5A CN112682098A (en) | 2020-12-28 | 2020-12-28 | Large vertical-depth large-aperture coal gangue feeding hole and construction method thereof |
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| CN202011578109.5A CN112682098A (en) | 2020-12-28 | 2020-12-28 | Large vertical-depth large-aperture coal gangue feeding hole and construction method thereof |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102865100A (en) * | 2012-09-20 | 2013-01-09 | 河北煤炭科学研究院 | Coal mine goaf filling method |
| CN202745931U (en) * | 2012-06-20 | 2013-02-20 | 鄂托克前旗长城煤矿有限责任公司 | Underground backfilling and conveying system for ground gangue of coal mine |
| CN104929567A (en) * | 2015-04-30 | 2015-09-23 | 山西蓝焰煤层气集团有限责任公司 | Low-cost construction process for passing through goaf |
| CN111115293A (en) * | 2020-01-15 | 2020-05-08 | 山东康格能源科技有限公司 | Vertical feeding buffer device for large-diameter solid materials in coal mine |
| CN112901247A (en) * | 2021-04-06 | 2021-06-04 | 中国矿业大学 | Coal mine underground multistage sleeve long-distance fire prevention and extinguishing drilling construction method |
-
2020
- 2020-12-28 CN CN202011578109.5A patent/CN112682098A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202745931U (en) * | 2012-06-20 | 2013-02-20 | 鄂托克前旗长城煤矿有限责任公司 | Underground backfilling and conveying system for ground gangue of coal mine |
| CN102865100A (en) * | 2012-09-20 | 2013-01-09 | 河北煤炭科学研究院 | Coal mine goaf filling method |
| CN104929567A (en) * | 2015-04-30 | 2015-09-23 | 山西蓝焰煤层气集团有限责任公司 | Low-cost construction process for passing through goaf |
| CN111115293A (en) * | 2020-01-15 | 2020-05-08 | 山东康格能源科技有限公司 | Vertical feeding buffer device for large-diameter solid materials in coal mine |
| CN112901247A (en) * | 2021-04-06 | 2021-06-04 | 中国矿业大学 | Coal mine underground multistage sleeve long-distance fire prevention and extinguishing drilling construction method |
Non-Patent Citations (2)
| Title |
|---|
| 张强: "林西矿深部开采充填投料钻孔施工技术研究", 《煤炭与化工》, 30 November 2018 (2018-11-30), pages 45 - 47 * |
| 王晓民等: "超深、超重井管大口径特殊钻孔施工工艺研究与应用", 《煤炭与化工》, vol. 43, no. 8, 31 August 2020 (2020-08-31), pages 24 - 26 * |
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Application publication date: 20210420 |