CN109403867A - Outburst elimination method is taken out in advance across the progressive pectination drilling driving band of face deep camber is adopted - Google Patents
Outburst elimination method is taken out in advance across the progressive pectination drilling driving band of face deep camber is adopted Download PDFInfo
- Publication number
- CN109403867A CN109403867A CN201811198996.6A CN201811198996A CN109403867A CN 109403867 A CN109403867 A CN 109403867A CN 201811198996 A CN201811198996 A CN 201811198996A CN 109403867 A CN109403867 A CN 109403867A
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- Prior art keywords
- drilling
- advance
- hole
- pectination
- face
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
- E21B7/06—Deflecting the direction of boreholes
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B21/00—Methods or apparatus for flushing boreholes, e.g. by use of exhaust air from motor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/02—Determining slope or direction
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
Abstract
The present invention relates to the methods of coal mine prevention and treatment coal and gas prominent, specially outburst elimination method is taken out in advance across adopting face deep camber progressive pectination drilling driving band, it is more that solution existing method accounts for resource, it is easy to increase tunnel footage unpayable, organizational difficulties are coordinated in production, it is pre- to take out effect problem of poor, step: one, clear extinction crossheading;Two, drill site is selected;Three, drilling takes out hole across the face deep camber of adopting in advance;Four, pre- pumping extinction is carried out to target position.Advantage: 1) it jumps, take out hole in advance around special area or work surface construction, pre- stripping belt length expands the drilling space extending extraction time;2) it realizes that a brill is porous, opens branched hole;3) it is accurately positioned drilling, reversed mash gas extraction is docked in drilling, extends drilling service life;4) detection operations face geological structure, Optimization Work face design, eliminates the footage unpayable of digging laneway;5) during tunneling, during construction is across face directional drilling is adopted, drilling does not enter pre- pumping digging laneway always, and the later period does not need to handle drilling.
Description
Technical field
The present invention relates to the methods of coal mine prevention and treatment coal and gas prominent, specially across adopting the progressive pectination drilling of face deep camber
Driving band takes out outburst elimination method in advance.
Background technique
It is one of the main means for preventing and treating coal and gas prominent that regional coal-seam takes out extinction in advance.Digging laneway concordant banded zone
It is pre- to take out extinction since its quick, economic, practical property is stronger, become arranging substantially for projecting mine digging laneway Achievements of Gas Control
It applies.But since conventional drill is by drilling distance shorter (effective extraction section that drills is generally within 300 m), drilling is difficult to protect
Especially often is there is phenomena such as bit freezing, breaking of rod, hole quality by geological structure and coal seam fluctuations in straight directional drilling
Difference, extraction extinction effect are difficult to ensure that the application of the technology is by severely restricts.Current existing improvement coal seam and Gas Outburst
Based on concordant band is taken out in advance, progressive concordant region and wear in a manner of a layer band combine.Reality is taken out using concordant band in advance
The production organization mode of row " two face of a team ", i.e., one driving team group occupy two working faces, one of them is driving face,
Another is working face of drilling, and carries out pre- pumping of drilling using directional drilling machine, each band is maintained at 600-800 m, alternates
Production organization mode.Such mode has the disadvantage that 1) driving team's group occupancy working face head number is more in implementation process,
Equipment is more, air quantity is more;2) often, team's group need to be between two even three driving faces for driving team's group removal of home stopping surface
Jump pick, organization of production difficult coordination;3) driving front geological construction cannot be visited clearly in advance, increases tunnel footage unpayable;4)
Driving face is found time short in advance, and generally at three months or so, pre- extinction effect of taking out is difficult to ensure, sometimes need to be in tunneling process
Increase local extinction measure, drivage efficiency is lower.Therefore, design it is a kind of facilitate feasible, what is taken up less resources can be across adopting face
Carry out in advance smoke outburst elimination method be very it is necessary to.
Summary of the invention
Present invention solution pre- pumping outburst elimination method occupancy resource existing at present is more, cannot visit clear driving front geological structure in advance
It is easy to increase tunnel footage unpayable in the case of making, organizational difficulties are coordinated in production, pre- to take out the bad problem of effect, provide a kind of across adopting
Deep camber progressive pectination drilling driving band in face takes out outburst elimination method in advance.
The present invention is realized by following operating procedure: being taken out in advance across the progressive pectination drilling driving band of face deep camber is adopted
Outburst elimination method, including following operating procedure:
One, extinction crossheading defines: determining the crossheading of next stope in advance, it is necessary to be to have dug tunnel or tunneled lane
The adjacent tunnel in road;Adjacent tunnel is typically chosen most suitable across long 200-240 meters of working face;
Two, it the selection of drill site: in conjunction with the pre-draining borehole for being taken out adjacent tunnel in advance, selects drill site to be arranged in and has dug or tunneled
In tunnel, while avoiding tomography or construction area;
Three, drilling takes out hole across the face deep camber of adopting in advance:
1), using existing return airway, crossheading not being dug to working face another and is drilled, every 3m measurement is primary in drilling process bores
The specific location of head, a piece drilling rod deflection certain angle of every construction, drilling rod angle excursion is no more than 1.25 °, hundred when control is crept into
Rice hole scattering angle is no more than 20 °;
2) branch technique construction branch hole, is opened using increasing hole angle reserved branch point and drop angle in drilling process;Creep into lane to be dug
Road areas adjacent opens branch hole parallel roadways drilling;Encounter the soft collapse hole in coal seam it is serious when, drilling turning section open branch hole
It is crept into Seam Roof And Floor, coal seam driving band is entered back into after turning section is normal and is normally crept into, guarantees to enter target as early as possible
Region (driving band) straight line drilling;
3), drilling arranges pectination drilling along crossheading trend to turning round behind crossheading position within the scope of the 15m of two sides, and as far as possible with it is pre-
Take out the pre-draining borehole overlap joint in adjacent tunnel;
Four, it drills using pectination and is taken out the pre-draining borehole in adjacent tunnel in advance to the pre- pumping extinction of target position progress.
Extinction crossheading is specified, mainly consider the construction length of effective extraction borehole and evades the risk of all kinds of drilling rod accidents.
Suitable drill site is selected, solves the problems, such as that driving team's group is repeatedly moved stopping surface, while avoiding structural belt and tomography, and bore pectination
Hole can overlap as far as possible with existing pre-draining borehole, reduce construction volume, improve production efficiency.Deep camber of constructing drills, and difficult point is
Drilling rod angle excursion is controlled in OK range, excessive to be easy to cause drill rod breaking, damage drilling is too small, and arc cannot be achieved
Drilling can not hide techonosphere, realize across the pre- extraction in the face of adopting, and by drilling rod rigidity, geological conditions, hole drilling deslagging in practice of construction
Equal many factors influence.To reduce drilling construction amount, constructed using the more drill methods in a hole, using DDMS with brill in drilling process
Measurement and Control System measures the real time position of drill bit, opens branch using increasing hole angle reserved branch point and drop angle in drilling process
Technology construction branch hole, drilling to tunnel areas adjacent to be dug open branch hole parallel roadways drilling, and techonosphere is hidden in realization,
Face is adopted across adjacent.
The step 3 drilling uses VLD-1000 directional drilling machine, described Step 3: 1) being controlled using DDMS measurement while drilling
System is measured drill bit specific location, and adjusts drilling rod angle excursion, when close to tunnel is taken out in advance, drill pipe buckling degree
No more than 1 °.VLD-1000 directional drilling machine is equipped with DHM downhole motor and DDMS measurement while drilling control system, make it have it is long away from
From drilling, accurate positioning and directional drilling function, close to adjustment drill pipe buckling degree when taking out tunnel in advance, it is ensured that gently turned round
Degree, it is easier to which azimuth of target is arrived in construction.It is described Step 3: 2) select reserved branch point when, as far as possible drilling turn round after it is pre-
Drilling machine operation variation is paid close attention to after taking out tunnel parallel sides 20m-50m, in drilling process, deslagging is turned one's coat situation, low speed drilling adds
Big hole flushing intensity improves borehole wall-protection function using CRP hole flushing liquid.Branch point selection ensures to drill connect pumping after be not easy to plug point
Fulcrum in drilling process, controls water-aspirator pressure, water flow and feed pressure, prevents rate of penetration too fast, bores turn location
There is collapse hole in hole or drilling is not gentle, keeps Completion of Drilling Hole poor, creeps into the later period or opens branch and hide some dangers for.
1) the method for the present invention, which has the advantage that, can jump, pre- around special area or work surface construction pectination band
Draining borehole, pre- stripping strip length reach 500m or more, solve drilling space and extraction time insufficient problem;2) realize that one bores
It is porous and can drilling connect pumping after a period of time, still can again return to original drilling if necessary, utilize DDMS
Or DGS measuring system precisely finds in hole and stops brill position, continues to construct or open branch's realization target;3) it is accurately positioned and bores
Into can also accomplish that reversed mash gas extraction is docked in drilling, extend drilling service life;4) it can be achieved to detect geological structure to working face
The accurate detection of (including leting speeper etc.), Optimization Work face design, eliminates the footage unpayable of digging laneway;5) during tunneling,
During construction is across face directional drilling is adopted, drilling does not enter pre- pumping digging laneway always, and the later period does not need to handle drilling.
Detailed description of the invention
Fig. 1 is specific embodiment drilling construction figure;
Fig. 2 is specific embodiment 3# drill site 1-4 drilling plane figure;
Fig. 3 is No. 3 drilling single hole sectional views in Fig. 2.
Specific embodiment
Outburst elimination method, including following operating procedure are taken out in advance across the progressive pectination drilling driving band of face deep camber is adopted:
One, extinction crossheading defines: determining the crossheading of next stope in advance, it is necessary to be to have dug tunnel or tunneled lane
The adjacent tunnel in road;Adjacent tunnel is typically chosen most suitable across long 200-240 meters of working face;
Two, it the selection of drill site: in conjunction with the pre-draining borehole for being taken out adjacent tunnel in advance, selects drill site to be arranged in and has dug or tunneled
In tunnel, while avoiding tomography or construction area;
Three, drilling takes out hole across the face deep camber of adopting in advance:
1), using existing return airway, crossheading not being dug to working face another and is drilled, every 3m measurement is primary in drilling process bores
The specific location of head, a piece drilling rod deflection certain angle of every construction, drilling rod angle excursion is no more than 1.25 °, hundred when control is crept into
Rice hole scattering angle is no more than 20 °;
2) branch technique construction branch hole, is opened using increasing hole angle reserved branch point and drop angle in drilling process;Creep into lane to be dug
Road areas adjacent opens branch hole parallel roadways drilling;Encounter the soft collapse hole in coal seam it is serious when, drilling turning section open branch hole
It is crept into Seam Roof And Floor, coal seam driving band is entered back into after turning section is normal and is normally crept into, guarantees to enter target as early as possible
Region (driving band) straight line drilling;
3), drilling arranges pectination drilling along crossheading trend to turning round behind crossheading position within the scope of the 15m of two sides, and as far as possible with it is pre-
Take out the pre-draining borehole overlap joint in adjacent tunnel;
Four, it drills using pectination and is taken out the pre-draining borehole in adjacent tunnel in advance to the pre- pumping extinction of target position progress.
When it is implemented, step 3 drilling uses VLD-1000 directional drilling machine, it is described Step 3: 1) using DDMS with
It bores Measurement and Control System to be measured drill bit specific location, and adjusts drilling rod angle excursion, when close to tunnel is taken out in advance, bore
Rod bending degree is not more than 1 °.It is described Step 3: 2) select reserved branch point when, as far as possible drilling turn round after by advance take out tunnel put down
After the 20m-50m of row side, low speed is crept into drilling process, increases hole flushing intensity, using CRP hole flushing liquid, improves borehole wall-protection function.
The technical effect of the method for the present invention is illustrated combined with specific embodiments below: certain coal mine field with "nine squares" area
73.34km2, field with "nine squares" includes 18 layers of coal, wherein the coal seam main mining coal seam 2#, 8# is dangerous seam with potential.The absolute gas amount of mine
Up to 320 m3/min.Mine uses subregion exhaust ventilation mode, 44700 m of total volume of return air3/min.Mine is vertical up and down using well
Body integrates gas drainage mode, 226 m of mash gas extraction total amount above and below well3/ min(marks condition), 70% or more extraction rate.Wherein underground
Using this coal seam, upper and lower adjacent layer, fissure zone gas drainage mode, 180 m of underground mash gas extraction amount3/ min(marks condition);On well
Using 174 mouthfuls of ground extraction drilling well, pre- extraction is carried out to mine planning region gas, at present mash gas extraction tolerance 46m3/min
(mark condition).The mine complex geologic conditions, gas bearing capacity is high, pressure is big, existing 12.42 m of exploiting field domain 2# coal seam gas-bearing capacity3/ t, coal
2.3 Mpa of layer gas pressure;14.42 m of 8# coal seam gas-bearing capacity3/ t, 1.9 Mpa of coal-bed gas pressure, gas permeability of coal seam is low,
Gas control difficulty of governance is big.
The panel mine Nan Si driving face has carried out largely across adopting face deep camber progressive pectination drilling driving band
It is pre- to take out extinction test application: as shown in Figure 1, in figure 18403 working faces, 18405 working faces be all made of it is progressive across face deep camber is adopted
Formula pectination drilling driving band takes out extinction technology in advance.18405 track lane third rounds are tunneled extinction and are used across the progressive driving in the face of adopting
Band takes out extinction technology in advance, which is arranged in 18403 track lanes, 18403-3# drill site as shown in Figure 1, and drill site is constructed four altogether
Drilling, practice of construction hole depth 800m-846m, drilling enter 18405 track lanes entirely across turning round after 18405 working faces, drilling
It is covered each by pre- pumping tunnel or so two and helps each 15m range of contour line, wherein 1#, 2# drilling are turned round across Ileal neobladder enters driving
Tunnel right hand side, Ileal neobladder is not only crossed in 3#, 4# drilling, but also takes out digging laneway across pre-, subsequently into a digging laneway left side
Hand side.Fig. 2 is enters pre- pumping roadway plan across turn after Ileal neobladder, and Fig. 3 is the hole 3# single hole sectional view, not only across back production
Face, but also digging laneway is taken out across pre-, enter after being passed through from Roadway Roof and takes out digging laneway coal seam in advance.
After taking out pectination drilling in advance across the progressive deep camber driving band in the face of adopting using present invention construction, average single hole gas
Flow reaches 1.1-1.8 m3/ min, hundred meters of drilling gas extraction amounts are increased to 0.07 m3/ min/100m is found time in advance by previous
Extend within 3 months 6 months or more, driving region coal seam gas-bearing capacity drop to 6 m3/ t hereinafter, and pectination drilling tunneling
Period remains to continue extraction, and digging laneway wind resource assessment outburst amount is stablized in 2-3 m3/ min, gas density are stablized 0.4%
Be increased to 12m/ days into speed by original 9m/ days hereinafter, average driving is single, realize " gas zero transfinites ", ensure that grow away from
From the safe and efficient production of driving face.
Claims (3)
1. one kind takes out outburst elimination method across the progressive pectination drilling driving band of face deep camber is adopted in advance, it is characterised in that: including following
Operating procedure:
Extinction crossheading defines: determining the crossheading of next stope in advance, it is necessary to be to have dug tunnel or just in digging laneway
Adjacent tunnel;Adjacent tunnel is typically chosen most suitable across long 200-240 meters of working face;
The selection of drill site: in conjunction with the pre-draining borehole for being taken out adjacent tunnel in advance, drill site is selected to be arranged in the lane dug or tunneled
In road, while avoiding tomography or construction area;
Drilling takes out hole across the face deep camber of adopting in advance:
1), using existing return airway, crossheading not being dug to working face another and is drilled, every 3m measurement is primary in drilling process bores
The specific location of head, a piece drilling rod deflection certain angle of every construction, drilling rod angle excursion is no more than 1.25 °, hundred when control is crept into
Rice hole scattering angle is no more than 20 °;
2) branch technique construction branch hole, is opened using increasing hole angle reserved branch point and drop angle in drilling process;Creep into lane to be dug
Road areas adjacent opens branch hole parallel roadways drilling;Encounter the soft collapse hole in coal seam it is serious when, drilling turning section open branch hole
It is crept into Seam Roof And Floor, coal seam driving band is entered back into after turning section is normal and is normally crept into, guarantees to enter target as early as possible
Region (driving band) straight line drilling;
3), drilling arranges pectination drilling along crossheading trend to turning round behind crossheading position within the scope of the 15m of two sides, and as far as possible with it is pre-
Take out the pre-draining borehole overlap joint in adjacent tunnel;
The pre-draining borehole for being drilled using pectination and being taken out adjacent tunnel in advance carries out pre- pumping extinction to target position.
2. according to claim 1 take out outburst elimination method across adopting face deep camber progressive pectination drilling driving band in advance, special
Sign is: the step 3 drilling uses VLD-1000 directional drilling machine, described Step 3: 1) using DDMS measurement while drilling control system
System is measured drill bit specific location, and adjusts drilling rod angle excursion, and when close to tunnel is taken out in advance, drill pipe buckling degree is not
Greater than 1 °.
3. according to claim 1 or 2 take out outburst elimination method across adopting face deep camber progressive pectination drilling driving band in advance,
It is characterized in that: described Step 3: being taken out tunnel parallel sides 20m- in advance after drilling is turned round as far as possible when 2) selecting reserved branch point
After 50m, low speed is crept into drilling process, increases hole flushing intensity, using CRP hole flushing liquid, improves borehole wall-protection function.
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Cited By (3)
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CN111324988A (en) * | 2020-03-03 | 2020-06-23 | 山西西山煤电股份有限公司 | Gas overrun early warning model construction method based on machine learning and early warning method |
CN111764955A (en) * | 2020-07-21 | 2020-10-13 | 中煤科工集团重庆研究院有限公司 | Coal roadway advance region pre-extraction method based on directional extraction drilling cross-roadway arrangement |
CN112377238A (en) * | 2020-08-25 | 2021-02-19 | 山西晋煤集团技术研究院有限责任公司 | One-hole dual-purpose gas extraction drill hole arrangement method |
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CN112377238A (en) * | 2020-08-25 | 2021-02-19 | 山西晋煤集团技术研究院有限责任公司 | One-hole dual-purpose gas extraction drill hole arrangement method |
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