CN108316856B - Strengthen cherry coal rock intensity drilling method and drilling tool step by step - Google Patents
Strengthen cherry coal rock intensity drilling method and drilling tool step by step Download PDFInfo
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- CN108316856B CN108316856B CN201810021051.0A CN201810021051A CN108316856B CN 108316856 B CN108316856 B CN 108316856B CN 201810021051 A CN201810021051 A CN 201810021051A CN 108316856 B CN108316856 B CN 108316856B
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- 239000003245 coal Substances 0.000 title claims abstract description 275
- 238000005553 drilling Methods 0.000 title claims abstract description 144
- 239000011435 rock Substances 0.000 title claims abstract description 114
- 241000167854 Bourreria succulenta Species 0.000 title claims abstract description 52
- 235000019693 cherries Nutrition 0.000 title claims abstract description 52
- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000007787 solid Substances 0.000 claims abstract description 90
- 230000035515 penetration Effects 0.000 claims abstract description 29
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 23
- 238000010276 construction Methods 0.000 claims abstract description 17
- 238000005728 strengthening Methods 0.000 claims abstract description 17
- 238000013461 design Methods 0.000 claims abstract description 14
- 238000009533 lab test Methods 0.000 claims description 4
- 239000012634 fragment Substances 0.000 claims description 3
- 238000007373 indentation Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 11
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000011160 research Methods 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 3
- 230000001737 promoting effect Effects 0.000 description 3
- 241001074085 Scophthalmus aquosus Species 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 210000000481 breast Anatomy 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001141 propulsive effect Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/02—Couplings; joints
- E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
- E21B17/05—Swivel joints
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
- E21B17/22—Rods or pipes with helical structure
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- Earth Drilling (AREA)
Abstract
Strengthen cherry coal rock intensity drilling method and drilling tool step by step the invention discloses a kind of, according to cherry coal rock intensity drilling method is strengthened step by step, is based on coal petrography solid coefficientfDetermine that coal and rock strengthens series N, length L is strengthened in classificationn, classification strengthen ratiod q‑n, Coal-Rock Bits rotation speed νc, it is based on coal petrography solid coefficientf, gas pressurepDetermine rate of penetration νd, air feed air quantityQ a, and determine the design form for strengthening cherry coal rock intensity drilling tool step by step.Strengthen cherry coal rock intensity drilling tool step by step, including coal petrography strengthens drill bit, rotation seal joint, Coal-Rock Bits, drilling rod step by step.The present invention is directed to cherry coal rock drilling technology problem, consider coal seam geological condition, it has invented and has strengthened cherry coal rock intensity drilling method and drilling tool step by step, using reinforcing cherry coal rock intensity drilling tool construction drill step by step, the collaboration drilling process scheme for realizing cherry coal rock " first strengthen step by step-creep into afterwards ", can be effectively improved the drilling effect of weak coal bearing seams.
Description
Technical field
The invention belongs to weak coal rock layer drilling project technical fields, and in particular to a kind of to strengthen cherry coal rock intensity brill step by step
Into method and drilling tool.
Background technique
Currently, weak coal rock layer drilling construction is one great difficult problem of drilling project technical field.Weak coal rock layer drilling
In the process, it since drilling deflection is big and easy unstable failure, causes that drilling resistance is big, deslagging is difficult, causes that drilling depth is shallow, bores
Into low efficiency, while in drilling process, the boring accidents such as bit freezing, breaking of rod take place frequently.Especially underground coal mine soft seam containing gas drills
Construction is acted on by factors such as crustal stress, gas pressure, tectonic stresses, and the deformation that drills, destruction are extremely serious, and drilling resistance is big, arranges
Slag space easily blocks, and the drillings accidents such as the breaking of rod, drilling gas burning easily occur in drilling process.Problem is crept into for cherry coal rock,
Scientific research and engineering staff have carried out a large amount of research, have developed serial drilling method and new drilling tool, for example, patent name is
" creeping into closed spiral guard aperture drilling tool and its application method for weak seam " (ZL201410567089.X), " it is used for cherry coal
The porous turbulent release drilling tool of rock drilling binary channels and its construction method " (ZL201310568692.5) " is used for soft projecting coal bed
Drilling bilayer in the anti-blocking drilling tool of deslagging and its application method " (ZL201310566830.6), " outburst coal seam hole temperature-reducing drilling tool and
Its drilling method " (ZL200610111830.7), " low helical abrasion-proof drill rod and its processing work for mash gas pumping drilling construction
Skill " (ZL200810049974.3), " Asymmetric special-section drill rod " (ZL200910064223.3), " irregularly shaped multi-land notch groove bores
Bar " (ZL200910064973.0) has all got preferable drilling effect, advances China cherry coal rock driller to a certain extent
The raising of journey technical level.For the drilling construction of weak coal and rock, if it is possible to which the intensity for improving weak coal and rock is being drilled
In the process, collapse hole phenomenon is advantageously reduced or avoided, reduces drilling resistance indirectly, is conducive to promote drilling results.Currently, state
Inside and outside scientific research personnel has also carried out a large amount of research, and proposes certain methods, for example, proposing using pressure maintaining drilling, solid wall liquid
Equal breast wall technologies carry out Reinforcing hole wall, reduce influence of the borehole collapse to drilling, but these technologies are applied to nearly horizontal gas drainage
Drilling, enforcement difficulty is big, and retaining wall effect is poor.Therefore, the present invention propose step by step strengthen cherry coal rock intensity drilling method and invent with
It is matched step by step strengthen cherry coal rock intensity drilling tool.According to job location coal rock layer geological conditions, based on reinforcing cherry coal rock step by step
Intensity drilling method simultaneously determine step by step strengthen cherry coal rock intensity drilling tool structure design form, strengthen step by step using coal petrography drill bit,
Coal-Rock Bits combine the novel reinforcing cherry coal rock intensity drilling tool construction drill step by step to be formed, and improve step by step in drilling process weak
The intensity of coal and rock strengthens coal and rock more stable, uniform, is conducive to the strengthening effect for promoting weak coal and rock, thus more
To be effectively improved the stability of borehole wall, to reduce the probability of drilling collapse hole, realize cherry coal rock " first step by step after reinforcing-
The synchronization drilling process system of drilling " is conducive to improve cherry coal rock drilling depth and drilling efficiency.
Summary of the invention
Strengthen cherry coal rock intensity drilling method and drilling tool step by step the object of the present invention is to provide a kind of, solves soft drilling in coal and rock
The difficult technical problem of easy collapse hole, the drilling of constructing.
In order to solve the above technical problems, the present invention adopts the following technical scheme: step by step strengthen cherry coal rock intensity drilling method,
The following steps are included:
1. takes coal sample or rock sample in place to be onstructed, coal petrography solid coefficient f is determined by laboratory test；Measurement is applied
Building site point coal-bed gas pressure p；
2. determines that coal and rock strengthens series N, length L is strengthened in classification according to job location coal petrography solid coefficient fn, classification
D is compared in reinforcingq-n；Strengthening series N is that coal petrography strengthens drill bit structure along the axial number of fragments that drills step by step, and each segment length is classification
Strengthen length Ln(n=1,2 ..., n)；Classification, which is strengthened, compares dq-n(n=1,2 ..., n) is that coal petrography strengthens drill bit classification reinforcing step by step
Length LnMaximum gauge dnThe ratio of (n=1,2 ..., n) and the Coal-Rock Bits diameter d for being mounted on drilling rod front end；When coal petrography is firm
When 0 < f≤0.3 of property coefficient, coal and rock strengthens series N and is 3~10 grades, strengthens length LnStrengthen ratio for 5mm~150mm, classification
dq-nIt is designed as 0.3~1；As 0.3 < f≤0.5 of coal petrography solid coefficient, coal and rock strengthens series N and is 2~8 grades, strengthens length
Spend LnStrengthen for 5mm~200mm, classification and compares dq-nIt is designed as 0.3~0.8；As 0.5 < f≤0.8 of coal petrography solid coefficient, coal
Rock mass strengthens series N and is 1~6 grade, strengthens length LnStrengthen for 10mm~500mm, classification and compares dq-nIt is designed as 0.1~0.5；When
When 0.8 < f≤1.2 of coal petrography solid coefficient, coal and rock strengthens series N and is 1~4 grade, strengthens length LnFor 10mm~500mm,
Classification, which is strengthened, compares dq-nIt is designed as 0~0.3；
3. determines Coal-Rock Bits rotation speed ν according to job location coal petrography solid coefficient fc；When coal petrography solid coefficient
When 0 < f≤0.3, Coal-Rock Bits rotation speed νcIt is designed as 120r/min~280r/min；As 0.3 < f of coal petrography solid coefficient
When≤0.5, Coal-Rock Bits rotation speed νcIt is designed as 100r/min~240r/min；When 0.5 < f of coal petrography solid coefficient≤
When 0.8, Coal-Rock Bits rotation speed νcIt is designed as 70r/min~240r/min；When 0.8 f≤1.2 < of coal petrography solid coefficient
When, Coal-Rock Bits rotation speed νcIt is designed as 60r/min~190r/min；
4. determines rate of penetration ν according to job location coal petrography solid coefficient f, gas pressure pd；When coal petrography robustness system
When f≤0.3 several 0 <, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as 0.2m/min~0.4m/min；When coal petrography heavily fortified point
When 0 f≤0.3 < of solidity coefficient, gas pressure p < 0.74MPa, rate of penetration νdIt is designed as 0.2m/min~0.6m/min；Work as coal
When 0.3 f≤0.5 < of rock solid coefficient, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as 0.4m/min~0.6m/
min；When 0.3 f≤0.5 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, rate of penetration νdIt is designed as 0.4m/min
~0.8m/min；When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as
0.6m/min~0.8m/min；When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, rate of penetration νd
It is designed as 0.6m/min~1m/min；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, drilling
Speed νdIt is designed as 0.8m/min~1m/min；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p < 0.74MPa,
Rate of penetration νdIt is designed as 0.8m/min~1.2m/min；
5. when air force deslagging, determining air feed air quantity according to job location coal petrography solid coefficient f, gas pressure p
Qa；When 0 f≤0.3 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, air feed air quantity QaIt is designed as 12m3/ min~
20m3/ min is 0.8MPa~1.5MPa for wind pressure；When 0 f≤0.3 < of coal petrography solid coefficient, gas pressure p < 0.74MPa
When, air feed air quantity QaIt is designed as 10m3/ min~18m3/ min is 0.8MPa~1.4MPa for wind pressure；When coal petrography robustness system
When f≤0.5 several 0.3 <, gas pressure p >=0.74MPa, air feed air quantity QaIt is designed as 10m3/ min~18m3/ min, for wind pressure
For 0.8MPa~1.3MPa；When 0.3 f≤0.5 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, air feed air quantity QaIf
It is calculated as 8m3/ min~16m3/ min is 0.7MPa~1.2MPa for wind pressure；When 0.5 f≤0.8 < of coal petrography solid coefficient, watt
When this pressure p >=0.74MPa, air feed air quantity QaIt is designed as 8m3/ min~16m3/ min is 0.7MPa~1.1MPa for wind pressure；
When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, air feed air quantity QaIt is designed as 7m3/ min~14m3/
Min is 0.6MPa~1MPa for wind pressure；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p >=0.74MPa,
Air feed air quantity QaIt is designed as 6m3/ min~14m3/ min is 0.6MPa~1MPa for wind pressure；As 0.8 < of coal petrography solid coefficient
When f≤1.2, gas pressure p < 0.74MPa, air feed air quantity QaIt is designed as 5m3/ min~12m3/ min is 0.6MPa for wind pressure
~0.8MPa；
6. drilling rod is mounted on drilling machine by, cherry coal rock intensity drilling tool is strengthened in installation step by step, adjusts construction angle, starts
Drilling machine increases drilling machine and is fed power, and coal petrography is strengthened to drill bit indentation coal and rock, when Coal-Rock Bits touch coal petrography wall, coal step by step
Rock bit starts brokenly coal petrography drilling, and in drilling process, coal petrography is strengthened drill bit step by step and do not rotated or rotation speed νq≤5r/
min；
7. determining spacing between drilling construction diameter, drilling, hole spacing top according to job location coal rock layer geological conditions
Bottom plate distance, dip angle of hole, azimuth, and according to step 1.~6., assess job location coal petrography solid coefficient f, gas pressure
Power p determines that coal and rock strengthens series N, length L is strengthened in classification based on coal petrography solid coefficient fn, classification strengthen compare dq-n, coal petrography
Bit rotation velocity νc, rate of penetration ν is determined based on coal petrography solid coefficient f, gas pressure pd, air feed air quantity Qa, and determine by
Grade strengthens the structure design form of cherry coal rock intensity drilling tool.
Strengthen cherry coal rock intensity drilling tool step by step, carries out structure design, packet using cherry coal rock intensity drilling method is strengthened step by step
It includes coal petrography and strengthens drill bit, rotation seal joint, Coal-Rock Bits, drilling rod step by step, the coal petrography strengthens drill bit step by step, rotatory sealing connects
Head, Coal-Rock Bits, drilling rod are coaxial, and coal petrography strengthens one end that drill bit is connected to rotation seal joint step by step, and Coal-Rock Bits are connected to
The other end of rotation seal joint, drilling rod are connect with Coal-Rock Bits.
The coal petrography strengthen step by step drill bit by strengthening body step by step, reinforcing joint forms, step by step strengthen body according to strong step by step
Change cherry coal rock intensity drilling method design is different series, strengthens body surface face step by step and is set as smooth and/or groove and/or convex
It rises and/or spiral groove and/or spiral salient, reinforcing joint with rotation seal joint for connecting.
The rotation seal joint is made of front connector, rotary body and rear joint, and front connector and coal petrography strengthen brill step by step
The reinforcing joint connection of head, rear joint are connect with Coal-Rock Bits.
The rotary body is made of outer ring, rolling element, inner ring；Coal petrography strengthens drill bit step by step and passes through front connector and rotary body
Inner ring connection, Coal-Rock Bits are connect with rotary body outer ring；Coal petrography strengthens drill bit step by step, Coal-Rock Bits any end is fixed, another
End, which applies power, to rotate.
As the above scheme is adopted, the present invention has the effect that
The present invention proposes the drilling method of weak coal and rock " first strengthen step by step-rear drilling ", by the innovation of drill bit structure,
It is formed and strengthens the novel reinforced cherry coal rock intensity drilling tool that drill bit, rotation seal joint, Coal-Rock Bits combine step by step.Using strong step by step
Change cherry coal rock intensity drilling tool construction drill, in drilling process, be mounted on front end coal petrography strengthen step by step drill bit squeeze step by step it is soft
Weak coal and rock improves the intensity of borehole circumference weakness coal and rock, and the front end due to strengthening drill bit step by step squeezes diameter to rear end
Segment design is carried out, weak coal and rock obtains being segmented to be strengthened step by step, the strengthening effect of weak coal and rock is improved, to more have
Effect improves the stability of borehole wall, is conducive to prevention drilling collapse hole, to improve cherry coal rock drilling depth and drilling efficiency.
Detailed description of the invention
Fig. 1 is the structural schematic diagram that the embodiment of the present invention one strengthens cherry coal rock intensity drilling tool step by step；
Fig. 2 is that one coal petrography of the embodiment of the present invention is strengthened drill bit, rotation seal joint, Coal-Rock Bits connection structure step by step and cutd open
View；
Fig. 3 is the left view of Fig. 2；
Fig. 4 is the 3-D view of Fig. 2；
Fig. 5 is drilling classification strengthening principle figure；
Fig. 6 is to strengthen cherry coal rock intensity drilling tool construction drill schematic diagram；
Fig. 7 is before two coal petrography of the embodiment of the present invention strengthens drill bit, rotation seal joint, Coal-Rock Bits connection structure step by step
View；
Fig. 8 is the 3-D view of Fig. 7；
Fig. 9 is before three coal petrography of the embodiment of the present invention strengthens drill bit, rotation seal joint, Coal-Rock Bits connection structure step by step
View；
Figure 10 is the 3-D view of Fig. 9；
Figure 11 is that four coal petrography of the embodiment of the present invention strengthens drill bit, rotation seal joint, Coal-Rock Bits connection structure step by step
Front view；
Figure 12 is the 3-D view of Figure 11.
Specific embodiment
Embodiment one: strengthen cherry coal rock intensity drilling method step by step, comprising the following steps:
1. takes coal sample or rock sample in place to be onstructed, coal petrography solid coefficient f is determined by laboratory test；Measurement is applied
Building site point coal-bed gas pressure p；
2. determines that coal and rock strengthens series N, length L is strengthened in classification according to job location coal petrography solid coefficient fn, classification
D is compared in reinforcingq-n；Strengthening series N is that coal petrography strengthens drill bit structure along the axial number of fragments that drills step by step, and each segment length is classification
Strengthen length Ln(n=1,2 ..., n)；Classification, which is strengthened, compares dq-n(n=1,2 ..., n) is that coal petrography strengthens drill bit classification reinforcing step by step
Length LnMaximum gauge dnThe ratio of (n=1,2 ..., n) and the Coal-Rock Bits diameter d for being mounted on drilling rod front end；When coal petrography is firm
When 0 < f≤0.3 of property coefficient, coal and rock strengthens series N and is 3~10 grades, strengthens length LnStrengthen ratio for 5mm~150mm, classification
dq-nIt is designed as 0.3~1；As 0.3 < f≤0.5 of coal petrography solid coefficient, coal and rock strengthens series N and is 2~8 grades, strengthens length
Spend LnStrengthen for 5mm~200mm, classification and compares dq-nIt is designed as 0.3~0.8；As 0.5 < f≤0.8 of coal petrography solid coefficient, coal
Rock mass strengthens series N and is 1~6 grade, strengthens length LnStrengthen for 10mm~500mm, classification and compares dq-nIt is designed as 0.1~0.5；When
When 0.8 < f≤1.2 of coal petrography solid coefficient, coal and rock strengthens series N and is 1~4 grade, strengthens length LnFor 10mm~500mm,
Classification, which is strengthened, compares dq-nIt is designed as 0~0.3；
3. determines Coal-Rock Bits rotation speed ν according to job location coal petrography solid coefficient fc；When coal petrography solid coefficient
When 0 < f≤0.3, Coal-Rock Bits rotation speed νcIt is designed as 120r/min~280r/min；As 0.3 < f of coal petrography solid coefficient
When≤0.5, Coal-Rock Bits rotation speed νcIt is designed as 100r/min~240r/min；When 0.5 < f of coal petrography solid coefficient≤
When 0.8, Coal-Rock Bits rotation speed νcIt is designed as 70r/min~240r/min；When 0.8 f≤1.2 < of coal petrography solid coefficient
When, Coal-Rock Bits rotation speed νcIt is designed as 60r/min~190r/min；
4. determines rate of penetration ν according to job location coal petrography solid coefficient f, gas pressure pd；When coal petrography robustness system
When f≤0.3 several 0 <, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as 0.2m/min~0.4m/min；When coal petrography heavily fortified point
When 0 f≤0.3 < of solidity coefficient, gas pressure p < 0.74MPa, rate of penetration νdIt is designed as 0.2m/min~0.6m/min；Work as coal
When 0.3 f≤0.5 < of rock solid coefficient, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as 0.4m/min~0.6m/
min；When 0.3 f≤0.5 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, rate of penetration νdIt is designed as 0.4m/min
~0.8m/min；When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as
0.6m/min~0.8m/min；When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, rate of penetration νd
It is designed as 0.6m/min~1m/min；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, drilling
Speed νdIt is designed as 0.8m/min~1m/min；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p < 0.74MPa,
Rate of penetration νdIt is designed as 0.8m/min~1.2m/min；
5. when air force deslagging, determining air feed air quantity according to job location coal petrography solid coefficient f, gas pressure p
Qa；When 0 f≤0.3 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, air feed air quantity QaIt is designed as 12m3/ min~
20m3/ min is 0.8MPa~1.5MPa for wind pressure；When 0 f≤0.3 < of coal petrography solid coefficient, gas pressure p < 0.74MPa
When, air feed air quantity QaIt is designed as 10m3/ min~18m3/ min is 0.8MPa~1.4MPa for wind pressure；When coal petrography robustness system
When f≤0.5 several 0.3 <, gas pressure p >=0.74MPa, air feed air quantity QaIt is designed as 10m3/ min~18m3/ min, for wind pressure
For 0.8MPa~1.3MPa；When 0.3 f≤0.5 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, air feed air quantity QaIf
It is calculated as 8m3/ min~16m3/ min is 0.7MPa~1.2MPa for wind pressure；When 0.5 f≤0.8 < of coal petrography solid coefficient, watt
When this pressure p >=0.74MPa, air feed air quantity QaIt is designed as 8m3/ min~16m3/ min is 0.7MPa~1.1MPa for wind pressure；
When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, air feed air quantity QaIt is designed as 7m3/ min~14m3/
Min is 0.6MPa~1MPa for wind pressure；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p >=0.74MPa,
Air feed air quantity QaIt is designed as 6m3/ min~14m3/ min is 0.6MPa~1MPa for wind pressure；As 0.8 < of coal petrography solid coefficient
When f≤1.2, gas pressure p < 0.74MPa, air feed air quantity QaIt is designed as 5m3/ min~12m3/ min is 0.6MPa for wind pressure
~0.8MPa；
6. drilling rod is mounted on drilling machine by, cherry coal rock intensity drilling tool is strengthened in installation step by step, adjusts construction angle, starts
Drilling machine increases drilling machine and is fed power, and coal petrography is strengthened to drill bit indentation coal and rock, when Coal-Rock Bits touch coal petrography wall, coal step by step
Rock bit starts brokenly coal petrography drilling, and in drilling process, coal petrography is strengthened drill bit step by step and do not rotated or rotation speed νq≤5r/
min。
7. determining spacing between drilling construction diameter, drilling, hole spacing top according to job location coal rock layer geological conditions
Bottom plate distance, dip angle of hole, azimuth, and according to step 1.~6., assess job location coal petrography solid coefficient f, gas pressure
Power p determines that coal and rock strengthens series N, length L is strengthened in classification based on coal petrography solid coefficient fn, classification strengthen compare dq-n, coal petrography
Bit rotation velocity νc, rate of penetration ν is determined based on coal petrography solid coefficient f, gas pressure pd, air feed air quantity Qa, and determine by
Grade strengthens the structure design form of cherry coal rock intensity drilling tool.
As shown in Figure 1 to 4, strengthen cherry coal rock intensity drilling tool step by step, using reinforcing cherry coal rock intensity drilling method step by step
Structure design is carried out, the implementation case drilling tool is designed as three-level reinforcing, including coal petrography strengthens drill bit 1, rotation seal joint step by step
2, Coal-Rock Bits 3, drilling rod 4, the coal petrography strengthen drill bit 1, rotation seal joint 2, Coal-Rock Bits 3, drilling rod 4 coaxially step by step, coal
Rock strengthens one end that drill bit 1 is connected to rotation seal joint 2 step by step, and Coal-Rock Bits 3 are connected to the another of rotation seal joint 2
End, drilling rod 4 are connect with Coal-Rock Bits 3.Coal petrography strengthen step by step drill bit 1 by strengthening body 11 step by step, reinforcing joint 12 forms, step by step by force
Changing body 11 according to cherry coal rock intensity drilling method design is strengthened step by step is different series, strengthens body surface face step by step and is set as smooth
And/or groove and/or protrusion, reinforcing joint 12 are used to connect with rotation seal joint 2.Rotation seal joint 2 by front connector 21,
Rotary body 22 and rear joint 23 form, and the reinforcing joint 12 that drill bit 1 is strengthened in front connector 21 with coal petrography step by step is connect, rear joint 23 and
Coal-Rock Bits 3 connect.Rotary body 22 is made of outer ring 221, rolling element 222, inner ring 223；Coal petrography is strengthened step by step before drill bit 1 passes through
Connector 21 is connect with 22 inner ring 223 of rotary body, and Coal-Rock Bits 3 are connect with 22 outer ring 221 of rotary body；Coal petrography strengthen step by step drill bit 1,
3 any end of Coal-Rock Bits is fixed, and the other end, which applies power, to be rotated.
The embodiment of the present invention one is described below and strengthens cherry coal rock intensity drilling tool boring principle:
The present invention determines coal petrography solid coefficient f according to job location coal rock layer geological conditions, by laboratory test, surveys
Determine job location coal-bed gas pressure p.Determine that coal and rock strengthens series N, length is strengthened in classification based on coal petrography solid coefficient f
Ln, classification strengthen compare dq-n, Coal-Rock Bits rotation speed νc, rate of penetration is determined based on coal petrography solid coefficient f, gas pressure p
νd, air feed air quantity Qa, and determine the structure design form for strengthening cherry coal rock intensity drilling tool step by step.As shown in figure 5, coal and rock is strengthened
Series is 3 grades, and it is respectively L that length is strengthened in classification1、L2、L3, classification, which is strengthened, compares dq-1=d1/ d, dq-2=d2/ d, dq-3=d3/ d, by force
Change and be gradually increased than classification, strengthens coal and rock more stable, uniform, be conducive to the strengthening effect for promoting weak coal and rock, from
And more effectively improve the stability of borehole wall, be conducive to prevention drilling collapse hole.
As shown in fig. 6, drilling construction is divided into coldworking strengthened coal petrography into porose area and bit cutting coal petrography into porose area.It squeezes strong
Change coal petrography at porose area: in drilling process, coal petrography strengthen step by step drill bit 1 by drilling machine propulsive force be pressed into coal and rock, due to coal petrography by
The frictional force that grade is strengthened between drill bit 1 and coal and rock ensure that coal petrography is strengthened drill bit 1 step by step and do not revolved by rotation seal joint 2
Turn or rotation speed νq≤ 5r/min extends forward with drilling, and coal petrography strengthens drill bit 1 step by step and constantly squeezes weak coal and rock,
Strengthen the reinforcing of drill bit 1 step by step due to coal petrography to be gradually increased than classification, strengthens coal and rock more stable, uniform.Bit cutting coal
Rock Cheng Kongqu: Coal-Rock Bits 3 are mounted on the rear end that coal petrography strengthens drill bit 1 step by step, and drilling machine holding drill pipe 4 drives Coal-Rock Bits 3 to revolve
Drilling after turning cutting reinforcing realizes the same of cherry coal rock " first strengthen step by step-creep into afterwards " to reduce the probability for the collapse hole that drills
Drilling process system is walked, is conducive to improve cherry coal rock drilling depth and drilling efficiency.
Embodiment two: as shown in Fig. 7~Fig. 8, different from embodiment one is, it is 4 grades that coal and rock, which strengthens series, favorably
In promoting strengthening effect step by step.
Embodiment three: as shown in Fig. 9~Figure 10, different from embodiment one is, it is 5 grades that coal and rock, which strengthens series, and
Reinforcing 11 interlude of body is designed as cylindric step by step, is conducive to the strengthening effect for further stablizing leading portion.
Example IV: as shown in Figure 11~Figure 12, different from embodiment three is, it is 6 grades that coal and rock, which strengthens series, and
Reinforcing body 11 has two sections of interludes to be designed as cylindric step by step, compares embodiment three, and coal petrography strengthening effect is more stable.
Claims (5)
1. strengthening cherry coal rock intensity drilling method step by step, it is characterised in that: the following steps are included:
1. takes coal sample or rock sample in place to be onstructed, coal petrography solid coefficient f is determined by laboratory test；Measure construction ground
Point coal-bed gas pressure p；
2. determines that coal and rock strengthens series N, length L is strengthened in classification according to job location coal petrography solid coefficient fn, classification strengthen
Compare dq-n；Strengthening series N is that coal petrography strengthens drill bit structure along the axial number of fragments that drills step by step, and each segment length is that classification is strengthened
Length Ln(n=1,2 ..., n)；Classification, which is strengthened, compares dq-n(n=1,2 ..., n) is that coal petrography strengthens drill bit classification reinforcing length L step by stepn
Maximum gauge dnThe ratio of (n=1,2 ..., n) and the Coal-Rock Bits diameter d for being mounted on drilling rod front end；When coal petrography solid coefficient
When 0 < f≤0.3, coal and rock strengthens series N and is 3~10 grades, strengthens length LnStrengthen for 5mm~150mm, classification and compares dq-nDesign
It is 0.3~1；As 0.3 < f≤0.5 of coal petrography solid coefficient, coal and rock strengthens series N and is 2~8 grades, strengthens length LnFor
5mm~200mm, classification, which are strengthened, compares dq-nIt is designed as 0.3~0.8；As 0.5 < f≤0.8 of coal petrography solid coefficient, coal and rock is strong
Change series N to be 1~6 grade, strengthen length LnStrengthen for 10mm~500mm, classification and compares dq-nIt is designed as 0.1~0.5；When coal petrography heavily fortified point
When 0.8 < f≤1.2 of solidity coefficient, coal and rock strengthens series N and is 1~4 grade, strengthens length LnIt is strong for 10mm~500mm, classification
D is compared in changeq-nIt is designed as 0~0.3；
3. determines Coal-Rock Bits rotation speed ν according to job location coal petrography solid coefficient fc；As 0 < f of coal petrography solid coefficient
When≤0.3, Coal-Rock Bits rotation speed νcIt is designed as 120r/min~280r/min；When 0.3 < f of coal petrography solid coefficient≤
When 0.5, Coal-Rock Bits rotation speed νcIt is designed as 100r/min~240r/min；When 0.5 f≤0.8 < of coal petrography solid coefficient
When, Coal-Rock Bits rotation speed νcIt is designed as 70r/min~240r/min；As 0.8 < f≤1.2 of coal petrography solid coefficient, coal
Rock bit rotation velocity νcIt is designed as 60r/min~190r/min；
4. determines rate of penetration ν according to job location coal petrography solid coefficient f, gas pressure pd；As 0 < of coal petrography solid coefficient
When f≤0.3, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as 0.2m/min~0.4m/min；When coal petrography robustness system
When f≤0.3 several 0 <, gas pressure p < 0.74MPa, rate of penetration νdIt is designed as 0.2m/min~0.6m/min；When coal petrography is firm
When 0.3 f≤0.5 < of property coefficient, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as 0.4m/min~0.6m/min；When
When 0.3 f≤0.5 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, rate of penetration νdIt is designed as 0.4m/min~0.8m/
min；When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, rate of penetration νdIt is designed as 0.6m/min
~0.8m/min；When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, rate of penetration νdIt is designed as
0.6m/min~1m/min；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, rate of penetration νd
It is designed as 0.8m/min~1m/min；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, drilling speed
Spend νdIt is designed as 0.8m/min~1.2m/min；
5. when air force deslagging, determining air feed air quantity Q according to job location coal petrography solid coefficient f, gas pressure pa；Work as coal
When 0 f≤0.3 < of rock solid coefficient, gas pressure p >=0.74MPa, air feed air quantity QaIt is designed as 12m3/ min~20m3/ min,
It is 0.8MPa~1.5MPa for wind pressure；When 0 f≤0.3 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, air feed wind
Measure QaIt is designed as 10m3/ min~18m3/ min is 0.8MPa~1.4MPa for wind pressure；When 0.3 < f of coal petrography solid coefficient≤
0.5, when gas pressure p >=0.74MPa, air feed air quantity QaIt is designed as 10m3/ min~18m3/ min, for wind pressure be 0.8MPa~
1.3MPa；When 0.3 f≤0.5 < of coal petrography solid coefficient, gas pressure p < 0.74MPa, air feed air quantity QaIt is designed as 8m3/min
~16m3/ min is 0.7MPa~1.2MPa for wind pressure；When 0.5 f≤0.8 < of coal petrography solid coefficient, gas pressure p >=
When 0.74MPa, air feed air quantity QaIt is designed as 8m3/ min~16m3/ min is 0.7MPa~1.1MPa for wind pressure；When coal petrography heavily fortified point
When 0.5 f≤0.8 < of solidity coefficient, gas pressure p < 0.74MPa, air feed air quantity QaIt is designed as 7m3/ min~14m3/ min, air feed
Pressure is 0.6MPa~1MPa；When 0.8 f≤1.2 < of coal petrography solid coefficient, gas pressure p >=0.74MPa, air feed air quantity
QaIt is designed as 6m3/ min~14m3/ min is 0.6MPa~1MPa for wind pressure；When 0.8 f≤1.2 < of coal petrography solid coefficient,
When gas pressure p < 0.74MPa, air feed air quantity QaIt is designed as 5m3/ min~12m3/ min, for wind pressure be 0.6MPa~
0.8MPa；
6. drilling rod is mounted on drilling machine by, cherry coal rock intensity drilling tool is strengthened in installation step by step, adjusts construction angle, starts drilling machine,
Increase drilling machine and be fed power, coal petrography is strengthened to drill bit indentation coal and rock, when Coal-Rock Bits touch coal petrography wall, Coal-Rock Bits step by step
Rotation starts broken coal petrography and creeps into, and in drilling process, coal petrography is strengthened drill bit step by step and do not rotated or rotation speed νq≤5r/min；
7. determining spacing between drilling construction diameter, drilling, hole spacing roof and floor according to job location coal rock layer geological conditions
Distance, dip angle of hole, azimuth, and according to step 1.~6., assess job location coal petrography solid coefficient f, gas pressure p,
Determine that coal and rock strengthens series N, length L is strengthened in classification based on coal petrography solid coefficient fn, classification strengthen compare dq-n, Coal-Rock Bits
Rotation speed νc, rate of penetration ν is determined based on coal petrography solid coefficient f, gas pressure pd, air feed air quantity Qa, and determination is strong step by step
Change the structure design form of cherry coal rock intensity drilling tool.
2. step by step strengthen cherry coal rock intensity drilling tool, using as described in claim 1 step by step strengthen cherry coal rock intensity drilling method
Structure design is carried out, including coal petrography strengthens drill bit, rotation seal joint, Coal-Rock Bits, drilling rod step by step, it is characterised in that: described
It is coaxial that coal petrography strengthens drill bit, rotation seal joint, Coal-Rock Bits, drilling rod step by step, and coal petrography strengthens drill bit step by step, and to be connected to rotation close
One end of sealing joint, Coal-Rock Bits are connected to the other end of rotation seal joint, and drilling rod is connect with Coal-Rock Bits.
3. according to claim 2 strengthen cherry coal rock intensity drilling tool step by step, it is characterised in that: the coal petrography is strengthened step by step
Drill bit by strengthening body step by step, reinforcing joint forms, step by step strengthen body according to step by step reinforcing cherry coal rock intensity drilling method design be
Different series strengthens body surface face step by step and is set as smooth and/or groove and/or protrusion and/or spiral groove and/or spiral prominence
It rises, reinforcing joint with rotation seal joint for connecting.
4. according to claim 2 or 3 strengthen cherry coal rock intensity drilling tool step by step, it is characterised in that: the rotatory sealing
Connector is made of front connector, rotary body and rear joint, and the reinforcing joint that drill bit is strengthened in front connector with coal petrography step by step is connect, rear joint
It is connect with Coal-Rock Bits.
5. according to claim 4 strengthen cherry coal rock intensity drilling tool step by step, it is characterised in that: the rotary body is by outer
Circle, rolling element, inner ring composition；Coal petrography is strengthened drill bit step by step and is connect by front connector with rotary body inner ring, Coal-Rock Bits and rotation
External circle connection；Coal petrography strengthens drill bit step by step, Coal-Rock Bits any end is fixed, and the other end, which applies power, to be rotated.
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