CN104975868A - Top plate high-position boring large-diameter long-drill-hole gas extraction method based on directional drilling - Google Patents
Top plate high-position boring large-diameter long-drill-hole gas extraction method based on directional drilling Download PDFInfo
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Abstract
The invention particularly relates to a top plate high-position boring large-diameter long-drill-hole gas extraction method based on directional drilling. The method solves the problems of great engineering quantity of the existing high-drainage roadway extraction and poor extraction effect of ordinary drill high-position hole drilling. The method comprises the following steps that: a, a plurality of drill sites are constructed at intervals at a ventilation connection roadway of an extraction working face, and drill holes constructed in the two adjacent drill sites are in lap joint; b, four drill holes are totally constructed in each drill site, and each drill hole passes through a working face crossheading position part and is positioned above a top plate; c, before the drill hole construction, a hole opening pipe is installed, and a hole opening gas-liquid separator is connected; d, rotary drilling is performed in a hole forming section, then, a hole sealing pipe is put at a hole sealing section, and a drilling machine directionally drills to a terminal hole and performs whole-process hole reaming after the grouting hole sealing; e, the outer end of the hole sealing pipe is connected with a snake-shaped pipe through a flange, and the other end of the snake-shaped pipe is connected with a gas collecting opening of a drainage pipe; and f, when a working face is pushed to a position passing through the hole bottom of a drill hole, the drainage operation is carried out. The top plate high-position boring large-diameter long-drill-hole gas extraction method improves the mine gas extraction rate, and has the advantages that the extraction concentration is high, and the flow rate is great.
Description
Technical field
The present invention relates to a kind of coal mine down-hole drilling gas pumping method, be specially an a kind of top board high position based on directional drilling and move towards major diameter long drilled holes gas pumping method.
Background technology
At present, most colliery is high methane or coal and gas outburst mine, and along with adopting dark increasing and Mechanization Level raising, goaf gas is gushed out and will be on the rise, particularly in lower permeability seam region, goaf gas extraction reduces the Main Means of stope Gas by becoming.
Goaf gas extraction mainly adopts hole pumping and mining, tunnel extraction, buries the extraction of (inserting) pipe.Tunnel extraction method substantially increases the stone drifting amount of mine; Bury (inserting) pipe extraction method and can only solve goaf accumulated methane, can not extraction goaf fissure zone gas; The high-order high drainage roadway of top board of ordi-nary drilling machine construction is short, and creep into engineering quantity greatly, boring is short for effective acting time, can not solve drill site and take over region Gas.
Summary of the invention
There is the large and problem that general brill high drill holes extracting effect is poor of engineering quantity to solve existing suction road gas pumping in the present invention, provides an a kind of top board high position based on directional drilling and move towards major diameter long drilled holes gas pumping method.
The present invention adopts following technical scheme to realize: the top board high position based on directional drilling moves towards major diameter long drilled holes gas pumping method, employing following steps: a, the construction of stope ventilating horizontal Chuan Chu interval have some drill sites, and the boring overlap joint of adjacent two drill sites construction; B, each drill site are constructed altogether four and are holed, and each boring is above return airway, and effective section is positioned at the fissure zone of goaf overlying rock; C, according to firm rigs of design parameters such as directional drilling perforate inclination angle, azimuths, and drilling construction before install orifice tube, connection holes implication liquid/gas separator; When d, boring start, crawler type all-hydraulic directional drilling machine is adopted to creep into, perforate section adopts rotary drilling, hole sealing tube is placed subsequently in sealing of hole section, and the gap location between sealing of hole section and hole sealing tube adopts cement injection sealing of hole, after sealing of hole section cement slurry sets, rig directional drilling is to whole hole, and construct re-starts omnidistance reaming to borehole bottom location backed off after random drilling rod; E, hole sealing tube outer end are connected with sinuous coil by flange, and the other end of sinuous coil is connected with releasing pipe gas collection mouth; F, after work plane pushes through position at the bottom of drilling hole, boring with work plane above cranny development, the conducting of gas enrichment "O"-ring, carry out extraction operation.
Downhole motor directional drilling machine is adopted to carry out directional drilling in stope roof strata one given layer position, the major diameter long drilled holes of many groups towards goaf fissure zone is being formed apart from tailentry 20m ~ 40m, after construction hole to be drilled completes, sealing of hole also accesses mine lower negative pressure gas drainage system, be advanced into behind position at the bottom of drilling hole until stope and carry out gas pumping, overcome existing suction road gas pumping and there is the large and problem that general brill high drill holes extracting effect is poor of engineering quantity.
Four borings in each drill site are parallel to the single sky in coal seam along work plane trend and arrange in roof, and drillable length covers work plane strike length, side 20m in crossheading lane on outermost pitch-row work plane in the effective section of each drill site, the adjacent level spacing in its excess-three hole is 5m, effective section refers to the layer position, middle and upper part being positioned at stope overlying rock fissure zone, boring aperture is 120mm, and often the effective segment length of group boring is 400m-500m, further increases extracting result.
The pumping method that the present invention adopts is rationally reliable, significantly can reduce stope gas at upper corner concentration, improve mine gas extraction rate, hole pumping and mining gas density is more than 50%, single hole extraction scale reaches 1.5m3/min, can long-time stable, effectively extraction goaf gas, there is easy construction, be convenient to management and the advantage that extraction concentration is high, flow is large.
Detailed description of the invention
A top board high position based on directional drilling moves towards major diameter long drilled holes gas pumping method, and employing following steps: a, the construction of stope ventilating horizontal Chuan Chu interval have some drill sites, and the boring overlap joint of adjacent two drill sites construction; B, each drill site are constructed altogether four and are holed, and each boring is above return airway, and effective section is positioned at the fissure zone of goaf overlying rock; C, according to firm rigs of design parameters such as directional drilling perforate inclination angle, azimuths, and drilling construction before install orifice tube, connection holes implication liquid/gas separator; When d, boring start, crawler type all-hydraulic directional drilling machine is adopted to creep into, perforate section adopts rotary drilling, hole sealing tube is placed subsequently in sealing of hole section, and the gap location between sealing of hole section and hole sealing tube adopts cement injection sealing of hole, after sealing of hole section cement slurry sets, rig directional drilling is to whole hole, and construct re-starts omnidistance reaming to borehole bottom location backed off after random drilling rod; E, hole sealing tube outer end are connected with sinuous coil by flange, and the other end of sinuous coil is connected with releasing pipe gas collection mouth; F, after work plane pushes through position at the bottom of drilling hole, boring with work plane above cranny development, the conducting of gas enrichment "O"-ring, carry out extraction operation.
Four borings in each drill site are parallel to the single sky in coal seam along work plane trend and arrange in roof, and drillable length covers work plane strike length, side 20m in crossheading lane on outermost pitch-row work plane in the effective section of each drill site, the adjacent level spacing in its excess-three hole is 5m, effective section refers to the layer position, middle and upper part being positioned at stope overlying rock fissure zone, boring aperture is 120mm, and often the effective segment length of group boring is 400m-500m.
In specific implementation process, drill site is of a size of wide × dark=5m × 5m, and two angles of smearing helped are 5m, and adjacent drilling holes at the drilling yard lap length is no less than 10m; Orifice tube and connection holes implication liquid/gas separator are installed, are convenient to water of drilling to import interim sump by the water tank that confluxes; The degree of depth of perforate section is not less than 12m, and perforate drilling tool adopts Φ 217mm drill bit+Φ 73mm drilling rod; Sealing of hole adopts Φ 160mmPVC(or PE) hole sealing tube, the degree of depth of sealing of hole section is no less than 12m, and port closing is no less than 200mm; Boring adopts Φ 96mm drill bit+Φ 73mm helicoid hydraulic motor to coordinate measurement while drilling device to creep into; Reaming adopts the rotary drilling of Φ 73mm+ Φ 120mm combined drill; Hole sealing tube outer end and Φ 110mm join hole pipe flange and connect, and carry out extraction through Φ 108mm sinuous coil access Φ 280mm releasing pipe gas collection mouth.
Claims (2)
1. the top board high position based on directional drilling moves towards a major diameter long drilled holes gas pumping method, it is characterized in that: employing following steps: a, the construction of stope ventilating horizontal Chuan Chu interval have some drill sites, and the boring overlap joint of adjacent two drill sites construction; B, each drill site are constructed altogether four and are holed, and each boring is above return airway, and effective section is positioned at the fissure zone of goaf overlying rock; C, according to firm rigs of design parameters such as directional drilling perforate inclination angle, azimuths, and drilling construction before install orifice tube, connection holes implication liquid/gas separator; When d, boring start, crawler type all-hydraulic directional drilling machine is adopted to creep into, perforate section adopts rotary drilling, hole sealing tube is placed subsequently in sealing of hole section, and the gap location between sealing of hole section and hole sealing tube adopts cement injection sealing of hole, after sealing of hole section cement slurry sets, rig directional drilling is to whole hole, and construct re-starts omnidistance reaming to borehole bottom location backed off after random drilling rod; E, hole sealing tube outer end are connected with sinuous coil by flange, and the other end of sinuous coil is connected with releasing pipe gas collection mouth; F, after work plane pushes through position at the bottom of drilling hole, boring with work plane above cranny development, the conducting of gas enrichment "O"-ring, carry out extraction operation.
2. the top board high position based on directional drilling according to claim 1 moves towards major diameter long drilled holes gas pumping method, it is characterized in that: four borings in each drill site are parallel to the single sky in coal seam along work plane trend and arrange in roof, and drillable length covers work plane strike length, side 20m in crossheading lane on outermost pitch-row work plane in the effective section of each drill site, the adjacent level spacing in its excess-three hole is 5m, effective section refers to the layer position, middle and upper part being positioned at stope overlying rock fissure zone, boring aperture is 120mm, often the effective segment length of group boring is 400m-500m.
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240046A (en) * | 2015-11-02 | 2016-01-13 | 山西晋煤集团技术研究院有限责任公司 | Drill hole layout method for gas extraction during primary mining and stoping of large mining height fully-mechanized face |
| CN107859514A (en) * | 2016-09-22 | 2018-03-30 | 河南理工大学 | A kind of method based on drilling parameter identification butt entry roof lithology |
| CN108506037A (en) * | 2018-03-19 | 2018-09-07 | 中煤科工集团西安研究院有限公司 | Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method |
| CN108894728A (en) * | 2018-07-27 | 2018-11-27 | 淮南矿业(集团)有限责任公司 | A kind of construction method of gas drainage directional long borehole group and directional long borehole |
| CN109113782A (en) * | 2018-08-15 | 2019-01-01 | 河南铁福来装备制造股份有限公司 | A method of cave gas control is made suitable for coal mine suction road downlink drilling |
| CN109488381A (en) * | 2018-12-11 | 2019-03-19 | 太原理工大学 | A kind of method of accurate determining goaf gas extraction best well location and layer position |
| CN109578058A (en) * | 2018-12-10 | 2019-04-05 | 中国矿业大学 | A method of extraction borehole gas extraction concentration is improved by auxiliary bore hole |
| CN111779451A (en) * | 2020-07-10 | 2020-10-16 | 淮南矿业(集团)有限责任公司 | Fixed-point water injection drilling method for goaf |
| CN113279729A (en) * | 2021-06-10 | 2021-08-20 | 中国矿业大学(北京) | Gas extraction method for leaking stoppage and concentration |
| CN113482701A (en) * | 2021-08-16 | 2021-10-08 | 淮南矿业(集团)有限责任公司 | Gas extraction method for high-position drilling of complex stratum of high-gas working face |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240046A (en) * | 2015-11-02 | 2016-01-13 | 山西晋煤集团技术研究院有限责任公司 | Drill hole layout method for gas extraction during primary mining and stoping of large mining height fully-mechanized face |
| CN105240046B (en) * | 2015-11-02 | 2017-05-10 | 山西晋煤集团技术研究院有限责任公司 | Drill hole layout method for gas extraction during primary mining and stoping of large mining height fully-mechanized face |
| CN107859514A (en) * | 2016-09-22 | 2018-03-30 | 河南理工大学 | A kind of method based on drilling parameter identification butt entry roof lithology |
| CN108506037A (en) * | 2018-03-19 | 2018-09-07 | 中煤科工集团西安研究院有限公司 | Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method |
| CN108506037B (en) * | 2018-03-19 | 2019-10-01 | 中煤科工集团西安研究院有限公司 | Coal working face top plate high position directional drilling group's pressure relief gas pumping mining method |
| CN108894728A (en) * | 2018-07-27 | 2018-11-27 | 淮南矿业(集团)有限责任公司 | A kind of construction method of gas drainage directional long borehole group and directional long borehole |
| CN109113782A (en) * | 2018-08-15 | 2019-01-01 | 河南铁福来装备制造股份有限公司 | A method of cave gas control is made suitable for coal mine suction road downlink drilling |
| CN109578058A (en) * | 2018-12-10 | 2019-04-05 | 中国矿业大学 | A method of extraction borehole gas extraction concentration is improved by auxiliary bore hole |
| CN109488381A (en) * | 2018-12-11 | 2019-03-19 | 太原理工大学 | A kind of method of accurate determining goaf gas extraction best well location and layer position |
| CN111779451A (en) * | 2020-07-10 | 2020-10-16 | 淮南矿业(集团)有限责任公司 | Fixed-point water injection drilling method for goaf |
| CN113279729A (en) * | 2021-06-10 | 2021-08-20 | 中国矿业大学(北京) | Gas extraction method for leaking stoppage and concentration |
| CN113482701A (en) * | 2021-08-16 | 2021-10-08 | 淮南矿业(集团)有限责任公司 | Gas extraction method for high-position drilling of complex stratum of high-gas working face |
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