CN106285674A - The method of impact soft seam tunnel with meeting head on release pressure energy - Google Patents
The method of impact soft seam tunnel with meeting head on release pressure energy Download PDFInfo
- Publication number
- CN106285674A CN106285674A CN201610915601.4A CN201610915601A CN106285674A CN 106285674 A CN106285674 A CN 106285674A CN 201610915601 A CN201610915601 A CN 201610915601A CN 106285674 A CN106285674 A CN 106285674A
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- Prior art keywords
- tunnel
- hole
- major diameter
- depth
- head
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C37/00—Other methods or devices for dislodging with or without loading
-
- 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
Abstract
The method that the invention discloses a kind of impact soft seam tunnel with meeting head on release pressure energy, first it determine the region that impact soft seam tunnel meets head on to have danger of burst；Determining to meet head in the tunnel with the rock burst fatalness area, move towards along tunnel, cross section perpendicular centrage both sides same level line is arranged two major diameter pilot holes, manifest situation according to rate of penetration with creeping into power simultaneously, determine that stress of coal seam situation of change, when determining that stress of coal seam is unchanged, continues to tunnel forward；When determining that stress of coal seam changes, when driving has the depth location 4m of shock hazard to distance, stop driving, move towards construction vibrations hole along tunnel in both sides, tunnel, after once detonation blast hole explosion, the crack between major diameter pilot hole is turned on, formed and destroy band, removal surge.Unloading pressure by blasting is played excessive lead effect by the present invention, forms " convex " type damage-form, in advance, releases energy in order, fundamentally reduces damaging impact dangerous.
Description
Technical field
The invention belongs to Coal Mining Technology field.
Background technology
In coal mining, the hardness Protodyakonov coefficient f coal seam less than or equal to 1.0 belongs to soft seam.China Mine Geological bar
Part is complicated and changeable, and along with the increase of the pit mining degree of depth, soft seam bump is increasingly severe, and this soft seam belongs to impact
Property soft seam.The front of meeting head on of tunnelling process is often accompanied by the situation such as structure, coal rock layer textural anomaly, gas exception,
Therefore, impact soft seam tunnelling Controlling of Coal Outburst of meeting head in deep is the technical barrier that solution is presently required.Occur in lane
Pressing the danger caused to be continuously increased, impact soft seam is particularly acute the damaging impact met head in road, current this kind of impact ground
The prevention and controls of pressure mainly takes unloading pressure means of holing, and this method easily induces impact failure under the conditions of impact soft seam,
Cause shake top, stuck rig phenomenon.Along with mining depth increases, it is extremely difficult to reduce the purpose of impact soft seam degree of danger.
Simultaneously because there is disguised disturbance induction danger, it is abnormal difficult that it controls difficulty, owing to current boring pressure relief method is formed
Relief range little, between boring, release is insufficient, causes heavily stressed transfer not in place, and energy release is insufficient, and bump is difficult
To control, and it is susceptible to the energy release that rank is bigger, causes great loss.When tunnel meets head on to there is the abnormal region of high stress
Time, when carrying out the boring release of routine, also occur creeping into difficulty phenomenon, solve danger effect poor.The most up to the present, Gao Ying
Meet head on the degree that bump the most fundamentally reaches to control completely in impact soft seam tunnel under the conditions of power, great burying.
Invent and a kind of use boring to guide to meet head on the technical side of bump with vibrations propagation property method preventing and treating impact soft seam tunnel
Method has Great significance.
Summary of the invention
In order to overcome the deficiencies in the prior art, fundamentally reaching the degree controlled completely, the present invention proposes a kind of impact
Property soft seam tunnel meet head on release ground pressure energy method.The method is guided by boring and releases energy with vibrations propagation property.
For reaching above-mentioned purpose, the present invention adopts the technical scheme that:
The method of a kind of impact soft seam tunnel with meeting head on release pressure energy, it is characterised in that step is as follows:
The first step, determine the region that impact soft seam tunnel meets head on to have danger of burst
At impact soft seam boring head, by analogy, the analysis of adjacent stope pressure bump behavior feature, on-the-spot reality
Observation judges, determines the region with danger of burst；
Second step, construction guidance hole
Determining to meet head in the tunnel with the rock burst fatalness area, moving towards along tunnel, in cross section perpendicular centrage both sides
The major diameter pilot hole of two more than diameter 115mm is arranged, it is desirable to hole depth 20m, orifice position distance base plate on same level line
1.2-1.6m, two spacings of wells 0.6-0.8m；12m is often tunneled in tunnel, continues to creep into forward 20m by two borings, maintains
The buffer protection band of the 8m degree of depth；During drilling construction, manifest situation according to rate of penetration with creeping into power, determine coal seam
Situation of change is strong and weak with stress, it is thus achieved that the depth of shock hazard；On the other hand two borings are played the increase scope of freedom and are led
To the effect of release；
When determining that stress of coal seam is unchanged, continue to tunnel forward, often tunnel 12m, stop driving, two borings are continued
Creep into forward the 20m degree of depth, keep the buffer protection band of the front at least 8m degree of depth；
3rd step, concussion of blasting release
When determining that stress of coal seam changes, when driving has the depth location 4m of shock hazard to distance, stop
Driving, move towards along tunnel in both sides, tunnel construction vibrations hole, every side construct three shake holes, including two diameter 115mm with
On major diameter emptying aperture and a diameter 42mm blast hole, major diameter void depth 10m, blast hole degree of depth 8m, three vibrations holes
Arrange in the same horizontal line, the elevation angle 0～3 °, distance bottom plate heights 1.2-1.5m；Two major diameter emptying aperture spacing 0.8-1m, its
In near inboard major diameter emptying aperture distance pilot hole 0.5m, blast hole is arranged in the middle of two major diameter emptying apertures；Major diameter is empty
Hole not powder charge, as the broken swollen space of explosion, blast hole loaded length 1.0-1.5m, is evenly arranged two thunders in parallel in blast hole
Pipe, wired in series outside hole, once detonation；Being turned in crack between major diameter pilot hole after explosion, formed and destroy band, removal rushes
Hit pressure.
Operation principle and the good effect of the present invention be: 1, by construction large-diameter deep pilot hole, on the one hand obtains impact
Dangerous trickle distribution, on the other hand plays the effect guiding release with the scope of freedom；2, after vibrations hole explosion, major diameter is empty
Crack conducting between hole, is formed and destroys band, has ensured the safety during region driving of meeting head on；3, advanced pilot hole is constructed in advance,
Unloading pressure by blasting is played excessive lead effect, forms " convex " type damage-form, in advance, release energy in order, fundamentally reduce
Damaging impact is dangerous.
Accompanying drawing explanation
The enforcement of the present invention is described below in conjunction with the accompanying drawings.
Fig. 1 is pilot hole of the present invention and the schematic diagram of vibrations pore cross section layout drawing；
Fig. 2 is the A-A direction view of Fig. 1, i.e. pilot hole and the schematic diagram of vibrations hole site plan.
In figure: 1-major diameter pilot hole, 2-major diameter emptying aperture, 3-powder stick, 4-blast hole, 5-meets head in tunnel.
Detailed description of the invention
As depicted in figs. 1 and 2, the method for the impact soft seam tunnel of the present invention with meeting head on release pressure energy is as follows:
One, the region that impact soft seam tunnel meets head on to have danger of burst is determined
At impact soft seam boring head, by analogy, the analysis of adjacent stope pressure bump behavior feature, on-the-spot reality
Observation judges, determines the region with danger of burst；
Two, construction guidance hole
As depicted in figs. 1 and 2, determining that the tunnel with the rock burst fatalness area meets head on 5, moving towards along tunnel, disconnected
The major diameter pilot hole 1 of two more than diameter 115mm is arranged, it is desirable to hole depth h1=on the same level line of vertical center line both sides, face
20m, orifice position distance bottom plate heights H=1.2-1.6m, pitch of holes a=0.6-0.8m；During drilling construction, according to
Rate of penetration manifests situation with creeping into power, determines that coal seam situation of change is strong and weak with stress, it is thus achieved that the position of shock hazard is deep
Degree；On the other hand the effect increasing scope of freedom guiding release is played in two borings；
When determining that stress of coal seam is unchanged, can continue to tunnel forward, often tunnel 12m, stop driving, by two major diameters
Pilot hole 1 continues to creep into forward the 20m degree of depth, keeps the buffer protection band of the front at least 8m degree of depth；
Three, concussion of blasting release
When further determining that stress of coal seam changes, there is to distance at driving the depth location 4m of shock hazard
Time, stopping driving, move towards construction vibrations hole in both sides, tunnel along tunnel, three vibrations holes of every side construction, including two diameters
The major diameter emptying aperture 2 of more than 115mm and a diameter 42mm blast hole 4, major diameter emptying aperture 2 degree of depth h2=10m, blast hole 4 is deep
Degree h3=8m, in the same horizontal line, the elevation angle 0～3 °, apart from bottom plate heights h4=1.2-1.5m for three vibrations holes layouts；Two
Major diameter emptying aperture spacing c=0.8-1m, wherein near distance b=0.5m of inboard major diameter emptying aperture 2 with pilot hole 1, explosion
Hole 4 is arranged in the middle of two large diameter holes 2；Major diameter emptying aperture 2 not powder charge is as the broken swollen space of explosion, and blast hole 4 is equipped with powder stick
3, powder stick 3 loaded length 1.0-1.5m, be evenly arranged two detonators in parallel, wired in series outside hole, once rise in blast hole 4
Quick-fried；After explosion, the crack between major diameter emptying aperture 2 is turned on, formed and destroy band, removal surge.
Claims (1)
1. the method for impact soft seam tunnel with meeting head on a release pressure energy, it is characterised in that step is as follows:
The first step, determine the region that impact soft seam tunnel meets head on to have danger of burst
At impact soft seam boring head, see by analogy, the analysis of adjacent stope pressure bump behavior feature and scene are actual
Survey and judge, determine the region with danger of burst；
Second step, construction guidance hole
Determining to meet head in the tunnel with the rock burst fatalness area, moving towards along tunnel, same in cross section perpendicular centrage both sides
The major diameter pilot hole of two more than diameter 115mm is arranged, it is desirable to hole depth 20m, orifice position distance base plate 1.2-on horizontal line
1.6m, two spacings of wells 0.6-0.8m；12m is often tunneled in tunnel, continues to creep into forward 20m by two borings, maintains 8m deep
The buffer protection band of degree；During drilling construction, manifest situation according to rate of penetration with creeping into power, determine stress of coal seam
Situation of change, it is thus achieved that the depth of shock hazard；On the other hand the work increasing scope of freedom guiding release is played in two borings
With；
When determining that stress of coal seam is unchanged, continue to tunnel forward, often tunnel 12m, stop driving, two borings are continued forward
Creep into the 20m degree of depth, keep the buffer protection band of the front at least 8m degree of depth；
3rd step, concussion of blasting release
When determining that stress of coal seam changes, when driving has the depth location 4m of shock hazard to distance, stop driving,
Move towards construction vibrations hole along tunnel in both sides, tunnel, construct three vibrations holes in every side, big including two more than diameter 115mm
Diameter emptying aperture and a diameter 42mm blast hole, major diameter void depth 10m, blast hole degree of depth 8m, three vibrations holes are arranged in
On same level line, the elevation angle 0～3 °, distance bottom plate heights 1.2-1.5m；Two major diameter emptying aperture spacing 0.8-1m, the most close
Inboard major diameter emptying aperture distance pilot hole 0.5m, blast hole is arranged in the middle of two major diameter emptying apertures；Major diameter emptying aperture does not fills
Medicine, as the broken swollen space of explosion, blast hole loaded length 1.0-1.5m, is evenly arranged two detonators in parallel, outside hole in blast hole
Wired in series, once detonation；After explosion, the crack between major diameter pilot hole is turned on, formed and destroy band, removal surge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915601.4A CN106285674A (en) | 2016-10-20 | 2016-10-20 | The method of impact soft seam tunnel with meeting head on release pressure energy |
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| CN201610915601.4A CN106285674A (en) | 2016-10-20 | 2016-10-20 | The method of impact soft seam tunnel with meeting head on release pressure energy |
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| CN106285674A true CN106285674A (en) | 2017-01-04 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952809A (en) * | 2018-07-11 | 2018-12-07 | 黑龙江科技大学 | A method of prevention and treatment bump is guided using energy |
| CN109915140A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | Press control method to a kind of irregular gob-surrounded pillar roadway bump |
| CN110005431A (en) * | 2019-04-13 | 2019-07-12 | 山东科技大学 | A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method |
| CN110185448A (en) * | 2019-05-19 | 2019-08-30 | 中铁十九局集团矿业投资有限公司 | A kind of ground fracturing and underground blasting control deep orebody rock burst method |
| CN113914859A (en) * | 2021-09-07 | 2022-01-11 | 中煤科工开采研究院有限公司 | Method for preventing rock burst during coal mine tunneling roadway fault crossing |
| CN115263318A (en) * | 2022-06-29 | 2022-11-01 | 中国矿业大学 | Combined pressure relief method for head-on blasting and cracking of rock burst mine excavation roadway |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108952809A (en) * | 2018-07-11 | 2018-12-07 | 黑龙江科技大学 | A method of prevention and treatment bump is guided using energy |
| CN108952809B (en) * | 2018-07-11 | 2020-01-14 | 黑龙江科技大学 | Method for preventing rock burst by energy guide |
| CN109915140A (en) * | 2019-04-13 | 2019-06-21 | 山东科技大学 | Press control method to a kind of irregular gob-surrounded pillar roadway bump |
| CN110005431A (en) * | 2019-04-13 | 2019-07-12 | 山东科技大学 | A kind of irregular gob-surrounded pillar working face Controlling of Coal Outburst method |
| CN110185448A (en) * | 2019-05-19 | 2019-08-30 | 中铁十九局集团矿业投资有限公司 | A kind of ground fracturing and underground blasting control deep orebody rock burst method |
| CN113914859A (en) * | 2021-09-07 | 2022-01-11 | 中煤科工开采研究院有限公司 | Method for preventing rock burst during coal mine tunneling roadway fault crossing |
| CN113914859B (en) * | 2021-09-07 | 2023-12-19 | 中煤科工开采研究院有限公司 | Method for preventing rock burst through fault of coal mine tunneling roadway |
| CN115263318A (en) * | 2022-06-29 | 2022-11-01 | 中国矿业大学 | Combined pressure relief method for head-on blasting and cracking of rock burst mine excavation roadway |
| CN115263318B (en) * | 2022-06-29 | 2023-09-19 | 中国矿业大学 | Combined pressure relief method for head-on explosion rupture hole of rock burst mine tunneling roadway |
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| C06 | Publication | ||
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| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170104 |
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| RJ01 | Rejection of invention patent application after publication |