CN110374599A - A kind of coal petrography drills the method for forming tunnel erosion control weak structure repeatedly - Google Patents
A kind of coal petrography drills the method for forming tunnel erosion control weak structure repeatedly Download PDFInfo
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- CN110374599A CN110374599A CN201910665668.0A CN201910665668A CN110374599A CN 110374599 A CN110374599 A CN 110374599A CN 201910665668 A CN201910665668 A CN 201910665668A CN 110374599 A CN110374599 A CN 110374599A
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- coal
- tunnel
- rock
- weak structure
- erosion control
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- 239000003245 coal Substances 0.000 title claims abstract description 85
- 230000003628 erosive effect Effects 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000011435 rock Substances 0.000 claims abstract description 55
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 39
- 239000010959 steel Substances 0.000 claims abstract description 39
- 238000005553 drilling Methods 0.000 claims abstract description 22
- 230000000694 effects Effects 0.000 claims description 8
- 238000010276 construction Methods 0.000 claims description 7
- 238000003032 molecular docking Methods 0.000 claims description 4
- 230000003245 working effect Effects 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 8
- 230000006378 damage Effects 0.000 abstract description 6
- 241001074085 Scophthalmus aquosus Species 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000005065 mining Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
It drills repeatedly the method for forming tunnel erosion control weak structure the invention discloses a kind of coal petrography, is to be drilled using drilling machine in designated position, rotational burst coal and rock, forms tunnel erosion control weak structure layer repeatedly, absorbs the energy of impulsion pressure release.The present invention is to pass through drilling fracturing coal and rock in roadway's sides, 6~12m steel pipe is inserted in drilling, repeated multiple times coal and rock can be carried out fracturing release to form weak structure layer due to repeatedly drilling without destroying roadway support layer, while in 6~12m of steel pipe by steel pipe, absorb impulsion pressure energy.The present invention is under the premise of effective protection roadway support layer; impulsion pressure energy can effectively be absorbed; weaken impulsion pressure to the extent of the destruction in tunnel; it is of great significance for the prevention and treatment of impulsion pressure; and drilling is a kind of method of simple and effective fracturing coal and rock repeatedly; very extensive application is obtained in unloading blast, and there is very high practical value in coal mine.
Description
Technical field
The present invention relates to the use of pressure relief vent repeatedly fracturing coal mine down-hole tunnel realize weak structure application field.Especially one
Kind tunnels suitable for coal mine down-hole tunnel and forms the weak knot of tunnel erosion control with the coal petrography pressure relief vent fracturing exploited security technology area
The method of structure.
Background technique
According to statistics, overbump mine pressure (bump) occurs for existing 178 mines in China, and impulsion pressure not only occurs on depth
Portion's mine, superficial part mine impulsion pressure accident also gradually increase, with the continuous exploitation of coal resources, impulsion pressure mine quantity
Will gradually it increase, impulsion pressure once occurs, it will causes greatly to threaten to the life of miner, cause to mine huge
Loss.Impulsion pressure be in the recovery process of coal mine, due to mining influence make tunnel and the original mechanical balance of working face by
To destruction, elasticity can occur the dynamic phenomenon rapidly discharged, above ground structure can be involved when serious.Therefore, impulsion pressure is asked
Topic has become a big technical problem of coal mine driving with exploitation, threat mine safety.
Impulsion pressure frequency increases with seam mining depth is presented non-linear growth relationship, impulsion pressure Prevention Technique
Validity, directly determine that can the disaster of impulsion pressure be effectively reduced.Especially in the serious mine of some impulsion pressures,
Although taking a variety of Prevention Techniques, this disaster of impulsion pressure could not be eliminated.
Most of coal mine coal seam in China is hard or coal seam on have complete tight roof, due to the intensity of coal and rock
Greatly, hardness is high, and coal and rock is complete, is easy accumulation great number of elastic energy, influences tunnelling and the exploitation of working face, while to tunnel
Stability also constitute a threat to.Tunnel coal and rock is once caving suddenly, and a large amount of elasticity can discharge suddenly, and vibration is strong, is caused
The generation of coal and rock impulsion pressure also constitutes great threat to neighbouring tunnel or working face.
Using destressing borehole, fracturing coal and rock realizes that weak structure technology is a kind of for coal mine driving prevention and treatment impact mine repeatedly
The new concept of pressure, it is different from traditional prevention and treatment impulsion pressure technology.There is important meaning to the safe and efficient driving of coal mine.It unloads
Pressure hole, which unloads to be pressed in impulsion pressure coal mine, to be widely used, and by pressure relief vent, fracturing coal and rock realizes weak structure technology repeatedly, is absorbed
Impulsion pressure energy is of great significance to safe working, roadway support and the impulsion pressure prevention and treatment of impulsion pressure mine.
Summary of the invention
Technical problem: the invention aims to overcome shortcoming in the prior art, a kind of coal petrography is provided and is bored repeatedly
The method that hole forms tunnel erosion control weak structure, based on pressure relief vent, using drilling machine, fracturing coal and rock realizes weak structure layer repeatedly, absorbs
Impulsion pressure energy prevents the generation of impulsion pressure to weaken threat of the impulsion pressure energy to roadway's sides and top plate.
Technical solution: coal petrography of the invention drills the method for forming tunnel erosion control weak structure repeatedly, includes the following steps:
A. tunnel is helped to coal and rock specific bit with drilling machine in tunnel or so two respectively during the headwork surface construction
It sets and beats several pressure relief vents, the coal and rock designated position is determined according to coal petrography property and pressure observation record, what left and right two was helped
Destressing borehole (5) positional symmetry；
B. it is put into and destressing borehole diameter in the section of the aperture for several destressing boreholes that tunnel or so two helps construction to complete
Identical steel pipe plays the role of strengthening roadway support layer, later, continues to drill into destressing borehole out of steel pipe, utilizes
Going deep into tunnel or so two helps the drilling rod in destressing borehole to carry out fracturing to coal and rock, forms the erosion control weak structure of roadway's sides；
C. it after the erosion control weak structure of roadway's sides is compacted under the effect of coal and rock pressure, is bored out of steel pipe to release again
It is crept into hole, fracturing is carried out to the coal and rock that tunnel or so two is helped again, situation, weight are compacted according to roadway's sides erosion control weak structure
The multiple coal and rock fracturing helped to tunnel or so two is multiple, in the process, helps multiple steel pipes of arrangement to reinforce by tunnel or so two
Roadway support layer will not destressing borehole effect under make coal and rock relaxation zone expand.
0.8~3m is divided between several pressure relief vent apertures.
Several described pressure relief vent vertical workings two are helped to squeeze into.
The bore diameter of several pressure relief vents is 90~130mm, and hole depth is not less than 20m.
The length of the steel pipe is 6~12m.
The steel pipe short steel pipes male and female screw docking is coupled.
The utility model has the advantages that preventing impact mine by adopting the above-described technical solution, the present invention can absorb impulsion pressure energy
Pressure damages tunnel, by using steel pipe in the multiple pressure relief vents of roadway's sides symmetrical construction, and in multiple pressure relief vent aperture sections
Guard aperture strengthens roadway support layer, applies brill with coal and rock of the drilling machine into pressure relief vent under the action of reinforced roadway branch sheath, punching
It presses release ground energy with hitting, so that coal and rock rupture is become weak structure layer, impulsion pressure energy is absorbed, to reduce impulsion pressure
Threat of the energy to roadway's sides and top plate, prevents the generation of impulsion pressure, more safely and effectively prevents and treats impulsion pressure, simultaneously
Advantageously reduce coal production cost.The present invention is based on pressure relief vents to be drilled by steel pipe using drilling machine repeatedly keeps coal and rock rupture real
Existing weak structure layer absorbs impulsion pressure energy, prevents and treats the method for impulsion pressure compared with prior art, major advantage has:
1) it is drilled repeatedly using pressure relief vent and forms weak structure layer prevention and treatment impulsion pressure, 6~12m steel is inserted in pressure relief vent
Pipe, using drilling machine, by steel pipe, fracturing coal and rock is crushed coal and rock repeatedly, and reaches presplitting coal in roadway's sides designated position
The effect of rock mass forms weak structure layer, absorbs impulsion pressure energy in time；
2) fracturing is carried out to the hard coal and rock of roadway's sides, forms weak structure layer, absorbs the energy of impulsion pressure, realized
Coal and rock reduction and stress transfer, it is raw to avoid hard coal and rock roadway bump mine pressure, while can also reduce tunnel coal petrography nearby
Body stress realizes the stability of tunnel and working face；
3) generation of hard coal and rock roadway bump mine pressure can be effectively controlled, realizes weak structure layer, absorbs impulsion pressure
Energy, for prevention and treatment impulsion pressure be of great significance, and drilling machine drill repeatedly realize weak structure layer simply, conveniently, safely,
It is economic, practical.
Detailed description of the invention
Fig. 1 is tunnel power strong structure schematic diagram of the invention；
Fig. 2 is roadway's sides pressure relief vent and steel pipe schematic diagram；
Fig. 3 is roadway's sides weak structure schematic diagram；
Fig. 4 is roadway's sides pressure relief vent arrangement schematic diagram.
In figure: strong small structure sheaf branch sheath in 1-；2- weak structure layer；Powerful structure outside 3-；The tunnel 4-；5- pressure relief vent；6-
Steel pipe；7- erosion control weak structure；The left side in the tunnel 8-；The right side in the tunnel 9-；10- driving face.
Specific embodiment
A kind of coal petrography of the invention drills the method for forming tunnel erosion control weak structure repeatedly, the specific steps are as follows:
A. during 10 construction tunnel 4 of driving face, shown in Fig. 4, arrow represents tunnelling direction.Utilize brill
Machine is helped to beat several pressure relief vents 5 to coal and rock designated position respectively in the left and right two in tunnel 4, the coal and rock designated position according to
Coal petrography property and pressure observation record determination, 5 positional symmetries of destressing borehole that left and right two is helped；5 aperture of several pressure relief vents
Between between be divided into 0.8~3m；Several 5 vertical workings two of pressure relief vent are helped to squeeze into；The bore diameter of several pressure relief vents 5 be 90~
130mm, hole depth are not less than 20m.
B. it is put into the section of the aperture for several destressing boreholes 5 that tunnel 4 or so two helps construction to complete straight with destressing borehole
The identical steel pipe 6 of diameter, the length of steel pipe are 6~12m；Steel pipe 6 is coupled by the docking of short steel pipes male and female screw.It plays and strengthens
The effect of roadway support layer continues to drill out of steel pipe 6 into destressing borehole 5 later, utilizes the drilling rod goed deep into destressing borehole
Fracturing is carried out to the coal and rock that tunnel 4 or so two is helped, coal and rock is mutually communicated after fracturing, forms the erosion control weak structure of roadway's sides
7；The erosion control weak structure 7 of roadway's sides is that hard coal and rock is carried out to fracturing into broken fritter, can more absorb impact
The energy of mine pressure release, reduces destruction of the impulsion pressure to the anchor shaft anchor cable in tunnel and supported laneway.
C. after the erosion control weak structure 7 of roadway's sides is compacted under the effect of coal and rock pressure, again to release out of steel pipe 6
Drilling in drilling 5, carries out fracturing to the coal and rock that tunnel 4 or so two is helped again, is compacted feelings according to roadway's sides erosion control weak structure
Condition, the coal and rock fracturing that tunnel 4 or so two is helped in repetition is multiple, in the process, multiple steel of arrangement is helped by tunnel 4 or so two
The roadway support layer that pipe 6 is reinforced will not be such that coal and rock relaxation zone expands under destressing borehole effect.
The invention will be further described for embodiment in reference to the accompanying drawing:
As shown in Figure 1, being routinely interior strong by this layer of coal and rock that anchor shaft anchor cable carries out supporting when tunnel 4 is constructed
Small structure sheaf branch sheath 1, since impulsion pressure energy can constitute a threat to 4 liang of tunnel side and top plate, is after the completion of tunnel 4
The generation of impulsion pressure is prevented, weak structure layer 2 is manufactured in strong small structure sheaf branch sheath 1 inside, bump energy is avoided to pass through
Outer damage of the powerful structure 3 to tunnel 4.
As shown in figure 4, in tunnel, right side 9 of left side 8 and tunnel is each beats pressure relief vent 5,5 aperture of pressure relief vent in digging laneway 4
Spacing is 0.8~3m, and right side 9 of the left side 8 of 5 vertical working of pressure relief vent and tunnel squeezes into, and 5 diameter of pressure relief vent is 90~130mm.
As shown in Fig. 2, being inserted in steel pipe 6 in pressure relief vent 5, diameter of steel tube just expires hole, a length of 6~12m of steel pipe.Steel pipe by
The docking of short steel pipes male and female screw is coupled.It can make coal repeatedly repeatedly to drilling in 6~12m of pressure relief vent by steel pipe
Rock masses fracturing forms weak structure layer, absorbs impulsion pressure energy, achievees the purpose that protect tunnel.
As shown in figure 3, after pressure relief vent 5 drills repeatedly under the supporting of steel pipe 6, since being mutually communicated for crack to form erosion control
Weak structure 7, it is completely broken that erosion control weak structure 7 does not need coal and rock, and coal and rock need to only be allowed crack occur, coal and rock integrality by
Destruction.
First time destressing borehole utilizes the drilling rod fracturing coal and rock of drilling machine by steel pipe, and the erosion control that fracturing coal and rock generates is weak
Structure can be gradually compacted under the action of coal and rock pressure, after the part i.e. erosion control weak structure that need fracturing are compacted,
Brill is applied to release brill by steel pipe using drilling machine for the second time, fracturing coal and rock will not destroy roadway support layer, according to coal and rock pressure
Truth condition can carry out third time or the 4th fracturing to coal and rock.
Claims (6)
- A kind of method for forming tunnel erosion control weak structure 1. coal petrography drills repeatedly, which comprises the steps of:A. tunnel (4) are helped specified to coal and rock with drilling machine in tunnel (4) left and right two respectively during the headwork surface construction Several pressure relief vents (5) are beaten in position, and the coal and rock designated position is determined according to coal petrography property and pressure observation record, left and right two Destressing borehole (5) positional symmetry of side；B. it is put into the aperture section for several destressing boreholes (5) that tunnel (4) left and right two helps construction to complete straight with destressing borehole The identical steel pipe of diameter (6) plays the role of reinforced roadway branch sheath, later, continues to bore into destressing borehole (5) from steel pipe (6) is interior Hole helps the drilling rod in destressing borehole to carry out fracturing to coal and rock, forms the erosion control of roadway's sides using tunnel (4) left and right two is goed deep into Weak structure (7)；C. it after the erosion control weak structure of roadway's sides is compacted under the effect of coal and rock pressure, is bored out of steel pipe (6) to release again Drilling in hole (5), the coal and rock helped again to tunnel (4) left and right two carry out fracturing, are compacted according to roadway's sides erosion control weak structure Situation, the coal and rock fracturing that tunnel (4) left and right two is helped in repetition is multiple, in the process, helps arrangement by tunnel (4) left and right two The roadway support layer that multiple steel pipes (6) are reinforced will not be such that coal and rock relaxation zone expands under destressing borehole effect.
- The method for forming tunnel erosion control weak structure 2. coal petrography according to claim 1 drills repeatedly, it is characterised in that: described Several pressure relief vents (5) aperture between be divided into 0.8~3m.
- The method for forming tunnel erosion control weak structure 3. coal petrography according to claim 1 or 2 drills repeatedly, it is characterised in that: Several described pressure relief vent (5) vertical workings two are helped to squeeze into.
- The method for forming tunnel erosion control weak structure 4. coal petrography according to claim 1 or 2 drills repeatedly, it is characterised in that: The bore diameter of several pressure relief vents (5) is 90~130mm, and hole depth is not less than 20m.
- The method for forming tunnel erosion control weak structure 5. coal petrography according to claim 1 drills repeatedly, it is characterised in that: described The length of steel pipe (6) is 6~12m.
- The method for forming tunnel erosion control weak structure 6. coal petrography according to claim 1 drills repeatedly, it is characterised in that: described Steel pipe (6) by short steel pipes male and female screw docking be coupled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910665668.0A CN110374599A (en) | 2019-07-23 | 2019-07-23 | A kind of coal petrography drills the method for forming tunnel erosion control weak structure repeatedly |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910665668.0A CN110374599A (en) | 2019-07-23 | 2019-07-23 | A kind of coal petrography drills the method for forming tunnel erosion control weak structure repeatedly |
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| CN110374599A true CN110374599A (en) | 2019-10-25 |
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| CN201910665668.0A Withdrawn CN110374599A (en) | 2019-07-23 | 2019-07-23 | A kind of coal petrography drills the method for forming tunnel erosion control weak structure repeatedly |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255465A (en) * | 2020-03-03 | 2020-06-09 | 中国矿业大学 | Method for forming roadway impact-resistant weak structural layer by coal rock blasting and fracturing |
| CN111271065A (en) * | 2020-03-03 | 2020-06-12 | 中国矿业大学 | Method for forming roadway anti-impact weak structural layer through coal rock gas cracking |
| CN111305848A (en) * | 2020-03-03 | 2020-06-19 | 中国矿业大学 | Method for forming roadway weak impact prevention structural layer by repeatedly drilling and fracturing coal rock |
| CN111322076A (en) * | 2020-03-03 | 2020-06-23 | 中国矿业大学 | Method for forming roadway scour-prevention weak structure through coal rock hydraulic fracturing |
| CN111350503A (en) * | 2020-03-03 | 2020-06-30 | 中国矿业大学 | Method for forming roadway anti-impact weak structural layer by coal rock pulse controllable strong wave induced cracking coal rock |
| CN111946343A (en) * | 2020-07-29 | 2020-11-17 | 山西晋城无烟煤矿业集团有限责任公司 | Method for solving hard top plate collapse problem through ground vertical hole composite jet fracturing |
| CN115788286A (en) * | 2022-12-16 | 2023-03-14 | 中国矿业大学 | Coal rock body pressure relief type oval drilling guide slotting pressure relief method |
-
2019
- 2019-07-23 CN CN201910665668.0A patent/CN110374599A/en not_active Withdrawn
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111255465A (en) * | 2020-03-03 | 2020-06-09 | 中国矿业大学 | Method for forming roadway impact-resistant weak structural layer by coal rock blasting and fracturing |
| CN111271065A (en) * | 2020-03-03 | 2020-06-12 | 中国矿业大学 | Method for forming roadway anti-impact weak structural layer through coal rock gas cracking |
| CN111305848A (en) * | 2020-03-03 | 2020-06-19 | 中国矿业大学 | Method for forming roadway weak impact prevention structural layer by repeatedly drilling and fracturing coal rock |
| CN111322076A (en) * | 2020-03-03 | 2020-06-23 | 中国矿业大学 | Method for forming roadway scour-prevention weak structure through coal rock hydraulic fracturing |
| CN111350503A (en) * | 2020-03-03 | 2020-06-30 | 中国矿业大学 | Method for forming roadway anti-impact weak structural layer by coal rock pulse controllable strong wave induced cracking coal rock |
| CN111946343A (en) * | 2020-07-29 | 2020-11-17 | 山西晋城无烟煤矿业集团有限责任公司 | Method for solving hard top plate collapse problem through ground vertical hole composite jet fracturing |
| CN115788286A (en) * | 2022-12-16 | 2023-03-14 | 中国矿业大学 | Coal rock body pressure relief type oval drilling guide slotting pressure relief method |
| CN115788286B (en) * | 2022-12-16 | 2023-10-31 | 中国矿业大学 | Coal rock mass pressure relief quasi-elliptic drilling guide slotting pressure relief method |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20191025 |
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| WW01 | Invention patent application withdrawn after publication |