CN114858019B - Roof cutting blasting method for transportation lane - Google Patents
Roof cutting blasting method for transportation lane Download PDFInfo
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- CN114858019B CN114858019B CN202210730118.4A CN202210730118A CN114858019B CN 114858019 B CN114858019 B CN 114858019B CN 202210730118 A CN202210730118 A CN 202210730118A CN 114858019 B CN114858019 B CN 114858019B
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- energy
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- collecting pipe
- roof
- detonators
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- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005422 blasting Methods 0.000 title claims abstract description 19
- 238000005553 drilling Methods 0.000 claims description 10
- 239000011435 rock Substances 0.000 claims description 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 6
- 239000003245 coal Substances 0.000 claims description 3
- 238000005065 mining Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002360 explosive Substances 0.000 description 2
- 241001391944 Commicarpus scandens Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/006—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries by making use of blasting methods
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D1/00—Blasting methods or apparatus, e.g. loading or tamping
- F42D1/08—Tamping methods; Methods for loading boreholes with explosives; Apparatus therefor
- F42D1/18—Plugs for boreholes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42D—BLASTING
- F42D3/00—Particular applications of blasting techniques
- F42D3/04—Particular applications of blasting techniques for rock blasting
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Abstract
The invention discloses a roof cutting blasting method for a transport roadway, which comprises the following steps: the height of the truncated roof exceeds that of the old roof, the length of the blasthole is 20m, the hole pitch of the blasthole is m x W, m is the dense coefficient of the blasthole, m=0.6-0.8, and W is the minimum resistance line; and a uncoupled charge structure is adopted, the charge coefficient is D/R, wherein D is the hole diameter of the gun, R is the diameter of the cartridge, and R=32. The problem that a centralized return airway in the prior art can be affected by dynamic pressure of a mining face is solved.
Description
Technical Field
The invention relates to a roof cutting blasting method for a transport roadway, and belongs to the technical field of blasting methods.
Background
When the mining face and the concentrated return air roadway tunneling working face are pushed in opposite directions, if the transportation roadway and the concentrated return air roadway are close to each other at the same level, the concentrated return air roadway is affected by dynamic pressure of the mining face when the distance between the two working faces is smaller than 150 m.
Disclosure of Invention
The invention aims to solve the technical problems that: the deep high-stress composite soft rock roadway support method is provided to overcome the defects in the prior art.
The technical scheme of the invention is as follows: a method of roof-cutting blasting for a transportation roadway, the method comprising:
the height of the truncated roof exceeds that of the old roof, the length of the blasthole is 20m, the hole pitch of the blasthole is m x W, m is the dense coefficient of the blasthole, m=0.6-0.8, and W is the minimum resistance line;
and a uncoupled charge structure is adopted, the charge coefficient is D/R, wherein D is the hole diameter of the gun, R is the diameter of the cartridge, and R=32.
Further, the minimum resistance line is equal to k×d, where K is a calculation coefficient, generally k=15 to 25, the soft rock takes a maximum value, the hard rock takes a minimum value, and the rock hardness medium takes k=20.
Further, the method further comprises the following steps:
the length of the energy collecting pipe is set to be 18m, and 12 energy collecting pipes are installed in each drilling hole;
the energy collecting pipe adopts a special energy collecting pipe, the outer diameter of the special energy collecting pipe is 42mm, the inner diameter of the special energy collecting pipe is 36.5mm, the length of each pipe is 1500mm, the two ends of the special energy collecting pipe are designed into big and small heads which are convenient to connect, and energy collecting holes with the diameter of 4mm are constructed on the two sides at intervals of 30 mm.
Further, the method further comprises the following steps:
the energy gathering holes must be drilled directly opposite the slits on both sides.
Further, the method further comprises the following steps:
and before charging, each energy-collecting blast hole begins to continuously charge from the bottom of the hole according to the design parameters of blasting charging in a roadway, a detonator and a lead wire are arranged, then the lead wire passes through a second energy-collecting pipe, the second energy-collecting pipe is connected with a first energy-collecting pipe by a special connecting piece, then the continuous charging is started in the second pipe, the lead wire is arranged, and the charging of all the energy-collecting pipes is completed in sequence according to the method, wherein each energy-collecting pipe is provided with a detonator, and the detonator is not needed when the energy-collecting pipes are not charged.
Further, the method further comprises the following steps:
the hole sealing section is sealed by yellow mud, and the hole sealing length is not less than 2.0m.
Further, the method further comprises the following steps:
the coal mine is detonated by adopting an electric detonator with a permissible millisecond, and single drilling holes are connected in series, and the number of each Kong Leiguan section is: 1-2 sections of detonators are assembled in a energy-gathering tube, 2 sections of detonators are assembled in a energy-gathering tube of 3-4 sections of detonators, 3 sections of detonators are assembled in a tube of 4-5 sections of detonators, 4 sections of detonators are assembled in a tube of 5-6 sections of energy-gathering tubes, 5 sections of detonators are assembled in a tube of 9-11 sections of energy-gathering tubes, and each drilling hole is connected in series.
The beneficial effects of the invention are as follows: compared with the prior art, the invention has the advantages that the roof cutting blasting is carried out, the roof cutting height is set to exceed the old roof, the blast hole length, the blast hole pitch and the blast hole density are specifically set, the uncoupled charging structure is adopted, the depth of the presplitting blasting crack is deepest, the orifice damage is minimized, the final result shows that the distance between the blasted area and the non-blasted area of the concentrated return air roadway transportation roadway is reduced by 300mm, and no obvious pressure appears in the blasted area of the concentrated return air roadway.
Drawings
FIG. 1 is a schematic cross-sectional view of a kerf drilling layout of the present invention;
FIG. 2 is a schematic diagram of a charge configuration of the present invention;
fig. 3 is a schematic diagram of the detonation network structure of the present invention.
Detailed Description
In order to better understand the above technical solutions, the following detailed description will refer to the accompanying drawings and specific embodiments.
Implementation example 1: referring to fig. 1 and 3, the present embodiment adopts a method for roof-cutting blasting in a transport roadway, which includes: the height of the truncated roof exceeds that of the old roof, the length of the blasthole is 20m, the hole pitch of the blasthole is m x W, m is the dense coefficient of the blasthole, m=0.6-0.8, and W is the minimum resistance line; and a uncoupled charge structure is adopted, the charge coefficient is D/R, wherein D is the hole diameter of the gun, R is the diameter of the cartridge, and R=32.
By roof cutting and blasting, the roof cutting height is set to exceed the old roof, the blast hole length, the blast hole pitch and the blast hole density are specifically set, a non-coupling charging structure is adopted, the depth of a presplitting blasting crack is deepest, the damage of an orifice is minimized, and the final result shows that the blasted area and the non-blasted area of the concentrated return air roadway transportation roadway are reduced by 300mm in the approaching amount of the roof and the bottom plate, and no obvious pressure is displayed in the blasted area of the concentrated return air roadway.
Further, the minimum resistance line is equal to k×d, where K is a calculation coefficient, generally k=15 to 25, the soft rock takes a maximum value, the hard rock takes a minimum value, and the rock hardness medium takes k=20.
Further, the method further comprises the following steps: the length of the energy collecting pipe is set to be 18m, and 12 energy collecting pipes are installed in each drilling hole; the energy collecting pipe adopts a special energy collecting pipe, the outer diameter of the special energy collecting pipe is 42mm, the inner diameter of the special energy collecting pipe is 36.5mm, the length of each pipe is 1500mm, the two ends of the special energy collecting pipe are designed into big and small heads which are convenient to connect, and energy collecting holes with the diameter of 4mm are constructed on the two sides at intervals of 30 mm.
And the energy-gathering tube is adopted for lancing, so that the lancing effect is improved. The energy collecting pipe is changed into a big end and a small end from the original connecting sleeve joint, so that the charging efficiency is improved, and the charging efficiency is improved from the original charging of one hole in 25 minutes to the charging of one hole in 20 minutes.
Further, the method further comprises the following steps: the energy gathering holes must be drilled directly opposite the slits on both sides.
The principle is as follows: the explosive energy firstly works towards two sides to play a role of lancing.
Further, the method further comprises the following steps: and before charging, each energy-collecting blast hole begins to continuously charge from the bottom of the hole according to the design parameters of blasting charging in a roadway, a detonator and a lead wire are arranged, then the lead wire passes through a second energy-collecting pipe, the second energy-collecting pipe is connected with a first energy-collecting pipe by a special connecting piece, then the continuous charging is started in the second pipe, the lead wire is arranged, and the charging of all the energy-collecting pipes is completed in sequence according to the method, wherein each energy-collecting pipe is provided with a detonator, and the detonator is not needed when the energy-collecting pipes are not charged.
The gap distance between the two groups of explosive is large, each energy gathering pipe is required to be provided with one detonator, and all the detonators are connected in series.
Further, the method further comprises the following steps: the hole sealing section is sealed by yellow mud, and the hole sealing length is not less than 2.0m.
Further, the method further comprises the following steps: the coal mine is detonated by adopting an electric detonator with a permissible millisecond, and single drilling holes are connected in series, and the number of each Kong Leiguan section is: 1-2 sections of detonators are assembled in a energy-gathering tube, 2 sections of detonators are assembled in a energy-gathering tube of 3-4 sections of detonators, 3 sections of detonators are assembled in a tube of 4-5 sections of detonators, 4 sections of detonators are assembled in a tube of 5-6 sections of energy-gathering tubes, 5 sections of detonators are assembled in a tube of 9-11 sections of energy-gathering tubes, and each drilling hole is connected in series.
The advantage is that the wire is less, the wire can be placed in the energy gathering tube and is not easy to break; in addition, whether the circuit is closed loop or not is convenient to detect.
The foregoing is a further detailed description of the invention in connection with the preferred embodiments, and it is not intended that the invention be limited to the specific embodiments described. It will be apparent to those skilled in the art that several simple deductions or substitutions may be made without departing from the spirit of the invention, and these should be considered to be within the scope of the invention.
Claims (5)
1. A method of roof cutting blasting for a transportation roadway, the method comprising:
the height of the truncated roof exceeds that of the old roof, the length of the blasthole is 20m, the hole pitch of the blasthole is m x W, m is the dense coefficient of the blasthole, m=0.6-0.8, and W is the minimum resistance line;
adopting a uncoupled charge structure, wherein the charge coefficient is D/R, D is the hole diameter of a blasthole, R is the diameter of a cartridge, and R=32;
the length of the energy collecting pipe is set to be 18m, and 12 energy collecting pipes are installed in each drilling hole;
the energy collecting pipe adopts a special energy collecting pipe, the outer diameter of the special energy collecting pipe is 42mm, the inner diameter of the special energy collecting pipe is 36.5mm, the length of each pipe is 1500mm, the two ends of the special energy collecting pipe are designed into big and small heads which are convenient to connect, and energy collecting holes with the diameter of 4mm are constructed on the two sides at intervals of 30 mm;
and before charging, each energy-collecting blast hole begins to continuously charge from the bottom of the hole according to the design parameters of blasting charging in a roadway, a detonator and a lead wire are arranged, then the lead wire passes through a second energy-collecting pipe, the second energy-collecting pipe is connected with a first energy-collecting pipe by a special connecting piece, then the continuous charging is started in the second pipe, the lead wire is arranged, and the charging of all the energy-collecting pipes is completed in sequence according to the method, wherein each energy-collecting pipe is provided with a detonator, and the detonator is not needed when the energy-collecting pipes are not charged.
2. The roof-cutting blasting method of claim 1, wherein the minimum resistance line is equal to K x D, where K is a calculation coefficient, generally taking k=15 to 25, soft rock takes a maximum value, hard rock takes a minimum value, and rock hardness medium takes k=20.
3. The transportation roadway roof-cutting blasting method of claim 1, further comprising:
the energy gathering holes must be drilled directly opposite the slits on both sides.
4. The transportation roadway roof-cutting blasting method of claim 1, further comprising:
the hole sealing section is sealed by yellow mud, and the hole sealing length is not less than 2.0m.
5. The transportation roadway roof-cutting blasting method of claim 1, further comprising:
the coal mine is detonated by adopting an electric detonator with a permissible millisecond, and single drilling holes are connected in series, and the number of each Kong Leiguan section is: 1-2 sections of detonators are assembled in a energy-gathering tube, 2 sections of detonators are assembled in a energy-gathering tube of 3-4 sections of detonators, 3 sections of detonators are assembled in a tube of 4-5 sections of detonators, 4 sections of detonators are assembled in a tube of 5-6 sections of energy-gathering tubes, 5 sections of detonators are assembled in a tube of 9-11 sections of energy-gathering tubes, and each drilling hole is connected in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210730118.4A CN114858019B (en) | 2022-06-24 | 2022-06-24 | Roof cutting blasting method for transportation lane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210730118.4A CN114858019B (en) | 2022-06-24 | 2022-06-24 | Roof cutting blasting method for transportation lane |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114858019A CN114858019A (en) | 2022-08-05 |
| CN114858019B true CN114858019B (en) | 2023-10-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210730118.4A Active CN114858019B (en) | 2022-06-24 | 2022-06-24 | Roof cutting blasting method for transportation lane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114858019B (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145326A (en) * | 2019-04-23 | 2019-08-20 | 中国矿业大学(北京) | Surrounding rock stability control method suitable for mine district main entry |
| CN112052574A (en) * | 2020-08-27 | 2020-12-08 | 东华理工大学 | Method for calculating explosive amount in coal pillar-free roof-cutting roadway-retaining presplitting blasting |
| CN112179228A (en) * | 2020-09-29 | 2021-01-05 | 太原理工大学 | Deep hole subsection blasting joint cutting control top plate overall collapse method |
| CN112179227A (en) * | 2020-10-10 | 2021-01-05 | 河南理工大学 | Coal face ultra-deep hole blasting roof cutting pressure relief control method and blasting charge structure |
| CN112377193A (en) * | 2020-10-16 | 2021-02-19 | 山东科技大学 | Deep well small coal pillar gob-side entry retaining method based on roof breaking and pressure relief of lower key layer of roof |
| CN112610218A (en) * | 2020-12-02 | 2021-04-06 | 中国矿业大学(北京) | Thick coal seam fully-mechanized top-tunneling top-cutting pressure relief automatic roadway forming method |
| CN113073978A (en) * | 2021-04-08 | 2021-07-06 | 中国矿业大学(北京) | Thick coal seam confined concrete pillar roof-cutting roadway coal-pillar-free mining method |
| CN113605893A (en) * | 2021-08-26 | 2021-11-05 | 河南理工大学 | Control method for pre-filled completely gob-side entry driving surrounding rock |
| CN113914858A (en) * | 2021-02-07 | 2022-01-11 | 中国矿业大学 | Basic top and top coal synchronous presplitting design method for shallow-buried double-hard extra-thick coal seam |
| CN114183138A (en) * | 2021-10-12 | 2022-03-15 | 安徽理工大学 | Coal seam end mining drilling hole presplitting blasting method |
-
2022
- 2022-06-24 CN CN202210730118.4A patent/CN114858019B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110145326A (en) * | 2019-04-23 | 2019-08-20 | 中国矿业大学(北京) | Surrounding rock stability control method suitable for mine district main entry |
| CN112052574A (en) * | 2020-08-27 | 2020-12-08 | 东华理工大学 | Method for calculating explosive amount in coal pillar-free roof-cutting roadway-retaining presplitting blasting |
| CN112179228A (en) * | 2020-09-29 | 2021-01-05 | 太原理工大学 | Deep hole subsection blasting joint cutting control top plate overall collapse method |
| CN112179227A (en) * | 2020-10-10 | 2021-01-05 | 河南理工大学 | Coal face ultra-deep hole blasting roof cutting pressure relief control method and blasting charge structure |
| CN112377193A (en) * | 2020-10-16 | 2021-02-19 | 山东科技大学 | Deep well small coal pillar gob-side entry retaining method based on roof breaking and pressure relief of lower key layer of roof |
| CN112610218A (en) * | 2020-12-02 | 2021-04-06 | 中国矿业大学(北京) | Thick coal seam fully-mechanized top-tunneling top-cutting pressure relief automatic roadway forming method |
| CN113914858A (en) * | 2021-02-07 | 2022-01-11 | 中国矿业大学 | Basic top and top coal synchronous presplitting design method for shallow-buried double-hard extra-thick coal seam |
| CN113073978A (en) * | 2021-04-08 | 2021-07-06 | 中国矿业大学(北京) | Thick coal seam confined concrete pillar roof-cutting roadway coal-pillar-free mining method |
| CN113605893A (en) * | 2021-08-26 | 2021-11-05 | 河南理工大学 | Control method for pre-filled completely gob-side entry driving surrounding rock |
| CN114183138A (en) * | 2021-10-12 | 2022-03-15 | 安徽理工大学 | Coal seam end mining drilling hole presplitting blasting method |
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| Publication number | Publication date |
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| CN114858019A (en) | 2022-08-05 |
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