CN104763469B - A kind of detection method of mine laneway wall gas emission - Google Patents
A kind of detection method of mine laneway wall gas emission Download PDFInfo
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- CN104763469B CN104763469B CN201510078373.5A CN201510078373A CN104763469B CN 104763469 B CN104763469 B CN 104763469B CN 201510078373 A CN201510078373 A CN 201510078373A CN 104763469 B CN104763469 B CN 104763469B
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- 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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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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
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
A kind of detection method of mine laneway wall gas emission of the present invention, belongs to technical field of mine safety；The detection method that wall gas emission can be detected accurately in a kind of underground coal mine complex environment is provided；A kind of detection method of mine laneway wall gas emission, comprises the following steps：The step of rib is pre-processed；The step of gas emission is detected；The step of rib is pre-processed be：Rib is sprayed using sealant, the crack on rib top layer is blocked, slowed down and stable rib Gas, and condition is provided for accurate detection gas density；The step of gas emission is detected be：Wall-attaching type Gas amount detecting device is arranged on the rib by pretreatment, the gas emission of coal seam wall is detected in real time exactly, regulation and control fan delivery is combined with the existing gas indicator of mine laneway, the purpose of reduction air draft cost and safety in production is reached；Present invention is mainly used in terms of colliery.
Description
Technical field
A kind of detection method of mine laneway wall gas emission of the present invention, belongs to technical field of mine safety.
Background technology
China is a big coal country, and gas is the high-quality clear energy sources with the common association of coal, is also that underground coal mine is opened
Adopt the major safety risks of driving face.In order to ensure Gas and behaviour in underground coal mine exploitation tunneling process mine laneway
Make face safety, current coal mining enterprise basic equipment Measuring System of Gas and ventilating system, due to coal mine laneway wall
Face Gas concentration is extremely uneven, and the data of existing gas detecting device detection are not accurate enough, to ensure safety in production, lead to
Wind system almost round-the-clock running at full capacity.According to statistics, blower fan power consumption accounts for the 15% to 20% of full mine total power consumption, has
Colliery is even up to more than 30%.Therefore the accurate size and rule for grasping gas flowing in coal layer, is that the reasonable mine that carries out leads to
Wind designs the important evidence with Comprehensive Gas Control.
Due to influenceing the factor of gas emission a lot, current China's mine gas emission rate is mostly based on prediction.Specially
Sharp CN102609780A is disclosed a kind of to be set up algorithm model to predict the new side of mine gas emission rate with Quantitative Theory Ⅰ
Method.Patent CN103352723A discloses a kind of by dividing coalbed gas geology unit, determining main controlling geological factors, set up mathematical modulo
Type is come the method for predicting gas emission.These predictions can only provide colliery certain theoretical foundation.
Patent CN103643997A discloses a kind of computational methods of the gas emission of small wind speed driving face, can be real
When dynamic calculation driving face gas emission, but the real gas emission of rib can not be detected.And rib gas gushes
Output accounts for tunneling more than 70% of gas emission in mine laneway.
Patent CN101781497A discloses a kind of underground gas plugging coating in coal mine, and gas can be prevented by being sprayed on rib
Seepage, the powder of the coating is mainly cement, silica flour, talcum powder, flyash etc., and wherein flyash (floating bead) addition is only
5~10%.It is published in《Total utilization of PCA》On " flyash is ground to underground coal mine mine laneway sprayed on material performance impact
Study carefully " in replace 40% or so quartz powder filler to prepare coal using the decarburization flyash in " flyash Floatation of Removal Carbon experimental study "
Sprayed on material under mine, it is functional.But flyash is using floatation decarburization, it is necessary to add expensive emulsifying agent, collecting
Agent and foaming agent, flotation yield is 30~35%, and the decarburization flyash that flotation is obtained also needs drying to use, and process is numerous
It is many；Decarburization flyash remained on surface after other flotation has the surfactants such as collecting agent and foaming agent, fly ash grain is existed
Easily reunite in coating and settle, make coating dispersiveness variation.
In summary, it is necessary to which prior art is improved.
The content of the invention
In order to overcome the shortcomings of that there is provided wall Gas in a kind of underground coal mine complex environment in the presence of prior art
Measure the detection method that can accurately detect.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of detection method of mine laneway wall gas emission, comprises the following steps：
The step of rib is pre-processed；
The step of gas emission is detected.
The step of rib is pre-processed be：Rib is sprayed using sealant, the crack on rib top layer is blocked, slowed down and steady
Determine rib Gas, and condition is provided for accurate detection gas density.
The step of gas emission is detected be：Wall-attaching type Gas amount detecting device is arranged on by pre-processing
Rib on, exactly in real time detection coal seam wall gas emission, combined regulation and control with the existing gas indicator of mine laneway
Fan delivery, reaches the purpose of reduction air draft cost and safety in production.
The sealant is 25~40: 40~55: 100 compositions according to the water: liquid material: powder of mass percent.
The liquid material is anionic acrylic ester emulsion or styrene-acrylate emulsion, and the powder is according to following
Percentage by weight is constituted：Superfined flyash 50~80, cement 0~30, graphite 3~5, carbon black 0~2, chlorinated paraffin 7~12, hydrogen
Aluminum oxide 3~8.
The gross weight of the superfined flyash and cement accounts for the 80% of powder；The graphite and carbon black are conductive filler, and
Gross weight accounts for the 5% of powder；The chlorinated paraffin and aluminium hydroxide are fire retardant, and gross weight accounts for the 15% of powder.
The wall-attaching type Gas amount detecting device includes setting in the seal box of bottomless inner hollow, the seal box
There are A types watt sensor, Type B firedamp sensor, temperature sensor, humidity sensor, pressure sensor, power supply and radio communication to set
It is standby, digital display panel, swing type air door, antenna and scavenger fan, the A types watt sensor, Type B watt are provided with the seal box
This sensor, temperature sensor, humidity sensor, pressure sensor, digital display panel and antenna connect with Wireless Telecom Equipment respectively
Connect, the Wireless Telecom Equipment is connected with power supply, the bottomless one side of the seal box can be bolted on rib, and
The gap between seal box and rib is sealed with composite polyurethane material.
The present invention have the advantage that compared with prior art for：
The crack that rib blocks rib top layer is sprayed using sealant, slows down and stable rib Gas, can provide
Stablize believable gas management condition；The sealant coating structure is fine and close, with good air-tightness, and caking property, water proofing property,
Stretch-resistance, antistatic behaviour, anti-flammability etc. meet relevant criterion, and it is main powder to change sealant using coal base solid waste flyash
Body filler, therefore cost is less than like product on the market；Wall-attaching type wall gas emission detection device can be in setting time model
Enclose periodically measure coal seam wall variation ofgas density situation and obtain Gas intensity, and gathered number can be wirelessly transferred
According to accurately measuring rib Gas intensity under calm condition；So as to realize the real-time detection to wall gas density, to calculate
Downhole production institute required airflow provides reliable basis.
Brief description of the drawings
The embodiment of the present invention is described in further detail below by accompanying drawing.
Fig. 1 is the structural representation of detection means in the present invention；
Fig. 2 is the electron-microscope scanning figure of the test specimen of embodiment 1 in the present invention；
Fig. 3 is the electron-microscope scanning figure of the full cement of embodiment 1 in the present invention.
1 it is digital display panel in figure, 2 be A types firedamp sensor, 3 be bolt, 4 be swing type air door, 5 is Type B methane sensing
Device, 6 be temperature sensor, 7 be humidity sensor, 8 be pressure sensor, 9 be antenna, 10 be scavenger fan, 11 be power supply, 12
It is seal box for Wireless Telecom Equipment, 13.
Embodiment
The invention will be further described for example below combination accompanying drawing.
Embodiment 1
By superfined flyash 60kg of the particle diameter for 2.18 μm, portland slag cement 20kg, chlorinated paraffin marked as 325
It is powder that 10kg, aluminium hydroxide 5kg, graphite 3kg, carbon black 2kg, which are mixed,；Flexible emulsion S400F 50kg are taken to fall at the construction field (site)
Enter grouting pump agitator tank, add 30kg water, after stirring at low speed is uniform, add above-mentioned powder, continuing to stir to enter
Row mine laneway wall spraying is constructed.
Testing result：
1) apparent property
Coating surface drying time 10min, does solid work time 7h, does solid work the smooth free from flaw of rear coating；
2) mechanical property
It is waterproof without processing tensile strength 3.1MPa, elongation at break 83%, 0.3MPa 30min, meet GB/T23445-
2009《Polymer cement waterproof paint》Specified in standard；
3) coal peace test
Anti-flammability is tested：Alcolhol burner flaming combustion 2.1s, flameless combustion 8s, flame spread length 105-129mm；Alcohol sprays
Lamp flaming combustion 1.1s, flameless combustion 4.2s, flame spread length 162-198mm；
Antistatic test：Test specimen upper table surface resistance 1.14 × 104Ω, following table surface resistance 5.83 × 103Ω；
Anti-flammability and antistatic behaviour meet coal industry standard MT-113-1995《Underground mine use polymer product hinders
Fire antistatic behaviour General Experimental Procedures and decision rule》Specified in require；
4) air-tightness
According to GB/T7755-2003《Vulcanize the measure of rubber or thermoplastic elastomer gas permeability》Method, is carried out to test specimen
Pressure differential method gas permeation measures examination, and oxygen transit dose is 76.445cm3/m224h0.1MPa, infiltration coefficient be 3.841 ×
10-10cm3·cm/m2·s·cmHg.Contrast test, oxygen have been made with the test specimen of full cement (being not spiked with superfined flyash) simultaneously
Transit dose is 212.309cm3/m224h0.1MPa, infiltration coefficient is 10.67 × 10-10cm3·cm/m2·s·cmHg.Can
To find out, the gas permeability of the present embodiment test specimen is only 1/3rd of full cement specimen.In addition, with the film mentioned in document
The infiltration coefficient contrast of material, the present embodiment test specimen and plastic sheeting (3.15 × 10-10cm3·cm/m2ScmHg), poly- second
Alkene (3.0 × 10-10cm3·cm/m2ScmHg), PE films (3.222 × 10-10cm3·cm/m2ScmHg air-tightness)
Quite.
And then electron-microscope scanning analysis, as shown in Figures 2 and 3, phase have been made respectively to the present embodiment test specimen and full cement specimen
Compare as can be seen that the present embodiment test specimen pattern homogeneous texture is fine and close, only a small amount of tiny micropore is developed, and full cement specimen office
Hole empty structure is larger after portion's amplification, illustrate that the addition of superfined flyash optimizes the grades of feed particles and grade matched somebody with somebody, improves
The compatibility of powder particles and emulsion, effectively prevent the formation of crack and hole, and the air-tightness of material is improved conscientiously.
A kind of wall-attaching type underground coal mine mine laneway wall Gas amount detecting device that the present invention is provided, such as Fig. 1 institutes
Show, mainly include digital display panel 1, optics firedamp sensor 2, bolt 3, swing type air door 4, catalysis burning firedamp sensor 5, temperature
Spend sensor 6, humidity sensor 7, pressure sensor 8, antenna 9, scavenger fan 10, power supply 11, Wireless Telecom Equipment 12, sealing
Case 13；The one side of seal box 13 is open, and whole casing can be fixed on rib by bolt 3, and uses composite polyurethane
Material profit sealing off gap.Be provided with seal box 13 detection rib gas emission needed for optics firedamp sensor 2, catalysis burning
Formula firedamp sensor 5, temperature sensor 6, humidity sensor 7, pressure sensor 8 and for detect data receiver, processing and pass
Defeated Wireless Telecom Equipment 12, digital display panel 1 and power supply 11, and realize the collection of coal seam wall gas emission, makes in coal seam watt
This, which is gushed out, concentrates within closed box；The timing of scavenger fan 10 discharges gas in seal box from swing type air door 4, and changes
Fresh air；External antenna 9 ensures that various parameters data are accurate, be easily transferred in control with built-in wireless telecommunications system 12
The heart；And can be with Real Time Observation gas density, temperature, humidity, pressure and other parameters from the digital display panel 1 on the outside of seal box.
Embodiment 2
By superfined flyash 70kg of the particle diameter for 3.76 μm, portland slag cement 10kg, chlorinated paraffin marked as 325
It is powder that 12kg, aluminium hydroxide 3kg, graphite 5kg, which are mixed,；Flexible emulsion S400F 50kg are taken to pour into grouting pump at the construction field (site)
Agitator tank, adds 32kg water, after stirring at low speed is uniform, adds above-mentioned powder, and mine lane can be carried out by continuing to stir
Road wall spraying construction.
Testing result：
1) apparent property
Coating surface drying time 12min, does solid work time 7h, does solid work rear coating free from flaw；
2) mechanical property
It is waterproof without processing tensile strength 3.5MPa, elongation at break 80%, 0.3MPa 30min, meet GB/T23445-
2009《Polymer cement waterproof paint》Specified in standard；
3) coal peace test
Anti-flammability is tested：Alcolhol burner flaming combustion 2.2s, flameless combustion 11.4s, flame spread length 80-89mm；Alcohol
Blowtorch flaming combustion 1.1s, flameless combustion 8.2s, flame spread length 95-109mm；
Antistatic test：Test specimen following table surface resistance 1.1 × 103Ω, upper table surface resistance 3.8 × 104Ω；
Anti-flammability and antistatic behaviour meet coal industry standard MT-113-1995《Underground mine use polymer product hinders
Fire antistatic behaviour General Experimental Procedures and decision rule》Specified in require；
4) air-tightness
According to GB/T7755-2003《Vulcanize the measure of rubber or thermoplastic elastomer gas permeability》Method, is carried out to test specimen
Pressure differential method gas permeation measures examination, and oxygen transit dose is 77.862cm3/m224h0.1MPa, infiltration coefficient be 3.912 ×
10-10cm3·cm/m2·s·cmHg。
Embodiment 3
By superfined flyash 75kg of the particle diameter for 2.18 μm, portland slag cement 5kg, chlorinated paraffin marked as 325
It is powder that 7kg, aluminium hydroxide 8kg, graphite 3kg, carbon black 2kg, which are mixed,；Flexible emulsion S400F 50kg are taken to fall at the construction field (site)
Enter grouting pump agitator tank, add 38kg water, after stirring at low speed is uniform, add above-mentioned powder, continuing to stir to enter
Row mine laneway wall spraying is constructed.
Testing result：
1) apparent property
Coating surface drying time 13min, does solid work time 7.5h, does solid work rear coating free from flaw；
2) mechanical property
It is waterproof without processing tensile strength 3.4MPa, elongation at break 70%, 0.3MPa 30min, meet GB/T23445-
2009《Polymer cement waterproof paint》Specified in standard；
3) coal peace test
Anti-flammability is tested：Alcolhol burner flaming combustion 1.2s, flameless combustion 8.7s, flame spread length 102-129mm；Alcohol
Blowtorch flaming combustion 1.2s, flameless combustion 4.1s, flame spread length 143-178mm；
Antistatic test：Test specimen upper table surface resistance 1.82 × 106Ω, following table surface resistance 2.45 × 105Ω；
Anti-flammability and antistatic behaviour meet coal industry standard MT-113-1995《Underground mine use polymer product hinders
Fire antistatic behaviour General Experimental Procedures and decision rule》Specified in require；
4) air-tightness
According to GB/T7755-2003《Vulcanize the measure of rubber or thermoplastic elastomer gas permeability》Method, is carried out to test specimen
Pressure differential method gas permeation measures examination, and oxygen transit dose is 82.472cm3/m224h0.1MPa, infiltration coefficient be 4.144 ×
10-10cm3·cm/m2·s·cmHg。
Claims (2)
1. a kind of detection method of mine laneway wall gas emission, it is characterised in that comprise the following steps：
The step of rib is pre-processed；
The step of gas emission is detected；
The step of rib is pre-processed be：Rib is sprayed using sealant, the crack on rib top layer is blocked, slowed down and stable coal
Wall Gas, and provide condition for accurate detection gas density；
The sealant is 25~40: 40~55: 100 compositions according to the water: liquid material: powder of mass percent；
The liquid material is anionic acrylic ester emulsion or styrene-acrylate emulsion, and the powder is according to following weight
Percentage is constituted：Superfined flyash 50~80, cement 0~30, graphite 3~5, carbon black 0~2, chlorinated paraffin 7~12, hydroxide
Aluminium 3~8：
The step of gas emission is detected be：Wall-attaching type Gas amount detecting device is arranged on the coal by pretreatment
On wall, detect the gas emission of coal seam wall in real time exactly, regulation and control can be combined with existing gas indicator in mine laneway
Fan delivery, reaches the purpose of reduction air draft cost and safety in production；
The wall-attaching type Gas amount detecting device is included in the seal box (13) of bottomless inner hollow, the seal box (13)
It is provided with A types watt sensor (2), Type B firedamp sensor (5), temperature sensor (6), humidity sensor (7), pressure sensor
(8) digital display panel (1), swing type air door are provided with, power supply (11) and Wireless Telecom Equipment (12), the seal box (13)
(4), antenna (9) and scavenger fan (10), the A types watt sensor (2), Type B firedamp sensor (5), temperature sensor (6),
Humidity sensor (7), pressure sensor (8), digital display panel (1) and antenna (9) are connected with Wireless Telecom Equipment (12) respectively, institute
State Wireless Telecom Equipment (12) to be connected with power supply (11), the bottomless one side of the seal box (13) is fixed on coal by bolt (3)
On wall, and gap of the seal box (13) between rib is sealed with composite polyurethane material.
2. a kind of detection method of mine laneway wall gas emission according to claim 1, it is characterised in that：It is described
The gross weight of superfined flyash and cement accounts for the 80% of powder；The graphite and carbon black are conductive filler, and gross weight accounts for powder
5%；The chlorinated paraffin and aluminium hydroxide are fire retardant, and gross weight accounts for the 15% of powder.
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| CN201510078373.5A CN104763469B (en) | 2015-02-10 | 2015-02-10 | A kind of detection method of mine laneway wall gas emission |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106644823B (en) * | 2016-12-21 | 2023-03-28 | 山西大学 | Air tightness testing device and method for coal wall coating |
| CN109577977B (en) * | 2018-09-26 | 2020-09-11 | 李永海 | Alarm device for preparation of starting of coal mining machine |
| CN110145367B (en) * | 2019-05-18 | 2020-07-31 | 安徽理工大学 | Gas monitoring device for coal mine safety production |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4968978A (en) * | 1988-09-02 | 1990-11-06 | Stolar, Inc. | Long range multiple point wireless control and monitoring system |
| CN101781497B (en) * | 2009-12-19 | 2012-06-27 | 山西潞安环保能源开发股份有限公司 | Underground gas plugging coating in coal mine |
| CN101975088A (en) * | 2010-09-21 | 2011-02-16 | 重庆安仪煤矿设备有限公司 | Subordinate type coal and gas outburst real-time early warning system |
| CN102619562B (en) * | 2012-04-05 | 2014-06-11 | 山东科技大学 | Instrument for monitoring gas emission quantity in roadway |
| CN203249865U (en) * | 2013-05-26 | 2013-10-23 | 黑龙江科技学院 | Coal mine gas concentration detection system based on infrared spectrum absorption |
| CN104121035B (en) * | 2014-07-12 | 2018-08-21 | 太原理工大学 | Underground mine gas adsorption device |
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