CN108194126A - High Position Drilling gas channel transformation dredging method - Google Patents
High Position Drilling gas channel transformation dredging method Download PDFInfo
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- CN108194126A CN108194126A CN201711375215.1A CN201711375215A CN108194126A CN 108194126 A CN108194126 A CN 108194126A CN 201711375215 A CN201711375215 A CN 201711375215A CN 108194126 A CN108194126 A CN 108194126A
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- drilling
- high position
- extraction
- drill
- gas
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- 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 mine gas extraction technical fields, and in particular to a kind of High Position Drilling gas channel transformation dredging method；Include the following steps, a, carry out High Position Drilling in coal working face first, i.e., design several drill sites, single group drill site is containing drilling 10 to roof construction drill in the air return lane of working face；B, interval closes extraction drilling valve at drill site and carries out extraction, continues 10min；C, the drilling closed for the first time is opened, and the drilling that is not turned off is closed, the duration be by having apparent rubble whereabouts sound in initial period extraction pipeline, when sound gradually without when stop；D, repeat the above steps b and c, 23 times；The method of the present invention increases the whole gas drainage amount of gas drainage under suction drill site, really embodies meaning of the extraction for stope methane monitor, easy to operate；It is short that the used time is lacked in employment, and most 30min complete work；Labor intensity is small.
Description
Technical field
The present invention relates to mine gas extraction technical fields, and in particular to a kind of High Position Drilling gas channel transformation dredging side
Method.
Background technology
In coal mining, Gas Disaster is always one of major casualty for threatening Safety of Coal Mine Production, although existing both at home and abroad
There are many technical methods, but be constrained to region and production environment condition in terms of gas control, whole popularization is not extensive.
However, gas drainage technique is still considered as being one of prevention Gas Disaster most efficient method.
General coal working face Gas is mainly derived from the goaf of overlying strata, to reach the gas control of working face
Purpose generally carries out gas drainage under suction, to reduce in recovery process by High Position Drilling of constructing to the goaf of the working face overlying
The high concentration gas of overlying strata is gushed out to working face.And the gas of extraction inevitably carries a small amount of rock powder, coal dust etc.
Microparticle sundries, bore inner particulate matter move with negative pressure of suction and block Gas Flow channel, cause under overlying strata gas
Let out the raising of face upper corner angle gas.When increasing relative to face gas, arranged at present using interim setting wind account, air duct etc.
It applies, but these measures are complicated for operation, labor-intensive, cost input is high.
Invention content
The present invention moves blocking Gas Flow channel to solve bore inner particulate matter with negative pressure of suction, leads to overlying
The problem of raising of face upper corner angle gas is let out under layer gas, provides a kind of High Position Drilling gas channel transformation dredging method.
In order to solve the above technical problems, the technical solution adopted in the present invention is：A kind of High Position Drilling gas channel transformation
Dredging method includes the following steps,
A, High Position Drilling is carried out in coal working face first, i.e., is designed in the air return lane of working face to roof construction drill
Several drill sites, single group drill site is containing drilling 10；
B, interval closes extraction drilling valve at drill site and carries out extraction, continues 10min；
C, the drilling closed for the first time is opened, and the drilling being not turned off is closed, and the duration is bright by having in initial period extraction pipeline
Aobvious rubble whereabouts sound, when sound gradually without when stop；
D, repeat the above steps b and c, 2-3 times.
Theoretical foundation
Gas drainage under suction channel is formed as reticulated cracks branch, and the particle that different size crack can accommodate is fixed.It shows as in 4
Form：1st, particle diameter is far longer than crack diameter, does not block；2nd, particle diameter is equal to or slightly greater than crack diameter, shows as
Surface is embedding attached, blocks；3rd, particle diameter is far smaller than crack diameter, shows as the filling of crack deep, blocks；4th, particle diameter is slightly
Less than crack diameter, show as surface or superficial part combination is embedding attached, block.Specific manifestation form is as shown in Figure 2.It is taken out under certain condition
It puts that granular mass entrained by negative pressure is certain, therefore can realize particle packing stable state by changing intermittent change negative pressure
Break.
Compared with prior art the invention has the advantages that：
The transformation dredging method of gas channel increases the whole gas drainage amount of gas drainage under suction drill site, really embodies extraction
For the meaning of stope methane monitor.It is easy to operate；Employment is few, only needs 1 people, most 2 people（Stay 1 people's pumping plant observation stream
Amount）；Used time is short, and most 30min complete work；Labor intensity is small；With respect to wind account, the limitation of taking stopgap measures of air duct has reached what is effected a permanent cure
Purpose.
Description of the drawings
Fig. 1 is the method for the present invention operation drilling schematic diagram.
Fig. 2 fixes the form of expression for the particle that the formation different size reticulated cracks of channel can accommodate.
Specific embodiment
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
A kind of High Position Drilling gas channel transformation dredging method, includes the following steps,
A, High Position Drilling is carried out in coal working face first, i.e., is designed in the air return lane of working face to roof construction drill
Several drill sites, single group drill site is containing drilling 10；
B, interval closes extraction drilling valve at drill site and carries out extraction, continues 10min；
C, the drilling closed for the first time is opened, and the drilling being not turned off is closed, and the duration is bright by having in initial period extraction pipeline
Aobvious rubble whereabouts sound, when sound gradually without when stop；
D, repeat the above steps b and c, 2-3 times.
The duration of step c is 10min.
8 drill sites are designed in step a, single group drill site is containing drilling 10, totally 80 drilling.
The spacing of drill site in the step a is 70-80m, and the level interval of drilling is 40-50m.
8112 working face of Jin Hua palaces 301 panel of ore deposit 12-3# layers is computed, with exploiting gas emission data reference in the past, recognizing
Gush out for the face gas and be mainly derived from 301 panel of overlying 12# layers, 8112 goaf and 8114 goafs.To reach the work
Make the gas control purpose in face, determine to carry out gas pumping to two goafs of the working face overlying by High Position Drilling of constructing
It puts, is gushed out with the high concentration gas for reducing overlying strata in recovery process to working face.
8112 working face high position firedamp taking-out discharging drilling of 12-3# layers is constructed during 5112 lanes, normal extraction, single group drill site watt
This extraction concentration changes in normal parabola, and stability of flow is in 100m3/min-115m3Between/min, extraction outlet gas density
It is controlled in 5.0% or so, 8112 face upper corner angle gas density 0.5% or so.However at 550m mileage gas drainage under suction drill sites
Roof cracking is serious, and in extraction drill site at this, drill site flow is suddenly down to 48.89m3/ min, extraction gas outlet gas density
1%-2% is down to, 8112 face upper corner angle gas densities increase to 2% or so.In view of the specific position residing for the drill site, just
Step regards as roof cracking, and bore inner particulate matter moves with negative pressure of suction and blocks Gas Flow channel, leads to overlying strata
Being let out under gas causes 8112 face upper corner angle gas to increase.Using High Position Drilling gas channel transformation dredging method of the present invention
Afterwards, gas drainage under suction Contrast on effect is as shown in table 1, and the transformation dredging method of gas channel of the present invention increases gas drainage under suction drill site
Whole gas drainage amount, really embody meaning of the extraction for stope methane monitor.
1 gas drainage under suction Contrast on effect result of table
| Drawing and deflating flux（m3/min） | Gas outlet gas density（%） | 8112 gas at upper corner concentration（%） | |
| Before dredging | 48.89 | 1-2 | 2 |
| After dredging | 125 | 6.2 | 0.42 |
Outside present invention may also apply to extraction drill site at 8112 face of Jin Hua palaces 301 panel of ore deposit 12-3# layers, 5112 lane 550m mileages, should also
During the flow adjustment with 850m drill sites at this, after period 850m mileage drill site is adjusted, flow is from 78m3/ min is carried
It has been raised to 120m3/min。
Claims (4)
1. a kind of High Position Drilling gas channel transformation dredging method, it is characterised in that：Include the following steps,
A, High Position Drilling is carried out in coal working face first, i.e., is designed in the air return lane of working face to roof construction drill
Several drill sites, single group drill site is containing drilling 10；
B, interval closes extraction drilling valve at drill site and carries out extraction, continues 10min；
C, the drilling closed for the first time is opened, and the drilling being not turned off is closed, and the duration is bright by having in initial period extraction pipeline
Aobvious rubble whereabouts sound, when sound gradually without when stop；
D, repeat the above steps b and c, 2-3 times.
2. High Position Drilling gas channel transformation dredging method according to claim 1, it is characterised in that：Step c's continues
Time is 10min.
3. High Position Drilling gas channel transformation dredging method according to claim 1, it is characterised in that：8 are designed in step a
A drill site, single group drill site is containing drilling 10, totally 80 drilling.
4. according to the High Position Drilling gas channel transformation dredging method described in claim 1-3 any one, it is characterised in that：It is described
The spacing of drill site in step a is 70-80m, and the level interval of drilling is 40-50m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201711375215.1A CN108194126A (en) | 2017-12-19 | 2017-12-19 | High Position Drilling gas channel transformation dredging method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711375215.1A CN108194126A (en) | 2017-12-19 | 2017-12-19 | High Position Drilling gas channel transformation dredging method |
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| Publication Number | Publication Date |
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| CN108194126A true CN108194126A (en) | 2018-06-22 |
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| CN201711375215.1A Pending CN108194126A (en) | 2017-12-19 | 2017-12-19 | High Position Drilling gas channel transformation dredging method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226413A (en) * | 2011-05-24 | 2011-10-26 | 中国矿业大学 | Gas extraction method of cross hole drilling area of gas discharge laneway |
| CN103306713A (en) * | 2013-05-20 | 2013-09-18 | 中国矿业大学 | Networking reinforcement method for cross drilling holes of outburst coal seam |
| CN103775127A (en) * | 2013-12-31 | 2014-05-07 | 中国矿业大学 | Method for comprehensively treating gas in low-air-permeability high-gas-content coal seam group |
| CN104481540A (en) * | 2014-10-08 | 2015-04-01 | 六盘水师范学院 | Method for controlling multiple coal mining hazards by high level borehole grouting |
| CN105401973A (en) * | 2015-10-24 | 2016-03-16 | 山西晋城无烟煤矿业集团有限责任公司 | Method for performing extraction treatment on corner gas on work faces of adjacent roadways |
-
2017
- 2017-12-19 CN CN201711375215.1A patent/CN108194126A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102226413A (en) * | 2011-05-24 | 2011-10-26 | 中国矿业大学 | Gas extraction method of cross hole drilling area of gas discharge laneway |
| CN103306713A (en) * | 2013-05-20 | 2013-09-18 | 中国矿业大学 | Networking reinforcement method for cross drilling holes of outburst coal seam |
| CN103775127A (en) * | 2013-12-31 | 2014-05-07 | 中国矿业大学 | Method for comprehensively treating gas in low-air-permeability high-gas-content coal seam group |
| CN104481540A (en) * | 2014-10-08 | 2015-04-01 | 六盘水师范学院 | Method for controlling multiple coal mining hazards by high level borehole grouting |
| CN105401973A (en) * | 2015-10-24 | 2016-03-16 | 山西晋城无烟煤矿业集团有限责任公司 | Method for performing extraction treatment on corner gas on work faces of adjacent roadways |
Non-Patent Citations (1)
| Title |
|---|
| 许立亭: "变压疏通瓦斯抽采裂隙通道设计分析", 《机械研究与应用》 * |
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Application publication date: 20180622 |