CN101320024B - Mine gas beam tube monitoring system and recognition method for gas explosivity and fire danger - Google Patents

Abstract

The invention relates to a mine gas beam tube monitoring system, comprising an automatic sampling device which consists of a gas path switching electromagnetic valve and a suction pump. The gas path switching electromagnetic valve is connected with a partial channel through a sampler and a single-core beam tube of a moisture separator and then a conduit head through a partial beam tube cable and is controlled by a programmable controller after a main beam tube cable is connected with a moisture separator box. The system is characterized in that the monitoring system also comprises an automatic sampling device which is composed of a sample making device. The sample making device consists of a non-oil injection pump and a conversion electromagnetic valve controlled by the programmable controller, a shunting needle-shaped valve with an emptying end, a dryer, a filtering device, a quantitative tube and a single-core beam tube of a flow meter which are successively connected through an automatically sampling pipe. The automatic sampling device is connected with a gas chromatography detection device for analyzing and outputting data to a computer. The computer controls the programmable controller and outputs detection results. The dryer and the filtering device are provided with long service life. The measuring point number extension is convenient and can be maintained easily. The cost is low. The sampling device samples steadily. The precision of detected gas is high. A recognition method for the gas explosiveness and the fire hazard is disclosed. The decision according to the analysis result is clear and prompt.

Description

Mine gas beam tube monitoring system

Affiliated technical field

The invention belongs to the monitoring of mine gas composition and gas burst property and fire risk recognition methods field; Comprise gas ingredients monitoring and gas burst property and fire risk recognition methods field in tunnel, rock gas, the oil exploitation, relate in particular to colliery mine gas beam tube monitoring system and mine flammable gas explosion property and the recognition methods of fire risk degree.

Background technology

At present, mine gas beam tube monitoring system has begun in the colliery, to obtain to popularize and use.Mine gas beam tube monitoring system be by beam tube with each measuring point gas of mine down-hole through the aspiration pump negative pressure extracting, be aggregated into the appointed place, by the gas chromatographic detection device beam tube institute production wells therapeutic method to keep the adverse qi flowing downward appearance is being analyzed, realize CO, CO ₂, CH ₄, C ₂H ₂, C ₂H ₄, C ₂H ₆, O ₂, N ₂, H ₂On-line monitoring Deng gas content; Its monitoring result is when providing data with modes such as real-time monitoring report, analysis daily paper; Also can deposit in automatically in the database; So that from now on the variation tendency of certain gas content is analyzed, thereby realize early prediction, also can be used to carry out mine flammable gas explosion danger, the identification of fire hazard degree the mine freely burning fire.Carrying out conventional prediction in mine main, is disaster relief service in mine disaster relief period.

Present existing mine gas beam tube monitoring system comprises that mainly single core beam tube that the centre by some terminations fixed sample device is provided with the single channel moisture trap is connected to the branch bobbin carriage; Be connected to the adapter case through being in charge of the beam tube cable again; Constitute sampling apparatus from taking over gas circuit switching solenoid valve, the aspiration pump that main beam pipe pipe cable that case is made up of some single core beam tubes inserts behind the moisture trap case by integrated circuit control; Comprise that also connecting no oily gas injection pump by the auto injection pipeline forms the automatic sampling apparatus that the sample preparation device constitutes through single core beam tube of exsiccator, filtrator, quantity tube; Automatic sampling apparatus connects gas chromatographic detection device analysis output data to computing machine, and the computer control integrated circuit is also exported testing result.

At present similar above mine gas beam tube monitoring system exsiccator, filtrator weak point in serviceable life; Because through integrated circuit control, the expansion of measuring point number is difficult by computing machine for sampling apparatus, sampling device, wiring is complicated; Easy-maintaining not; And cost is high, and the sampling device sample introduction is unstable, and the detected gas precision is low.

At present; Flammable gas explosion property recognition methods under the coal mine---following all titles " recognition methods of gas burst property "; In issue on March 30th, 2007, stipulate in " the safety in production industry standard AQ1044-2007 of the People's Republic of China (PRC) replaces MT/T698-1997 " mine sealing preventing and extinguishing fire technology standard " appendix B (standardization appendix) to judge the triangulation method of fire district gas explosion danger property " of implementing on July 1st, 2007.Main contents are following: judge the explosion triangle method of gas explosion danger property in the fire district, be divided into two kinds of explosion triangle synthetic method and explosion triangle normalization methods.Referring to Fig. 6.

The explosion triangle synthetic method:

If contain n kind explosibility gas in the fire district gas, concentration is respectively X _i(i=1,2..., n); Contain two kinds of excess inert gas (CO ₂And N ₂), concentration is respectively

With

Oxygenous concentration is Y _p, fire district's gas burst Atria apex coordinate is pressed following various calculating:

The coordinate of upper change point U:

$X_u=\frac{\mathrm{\Σ}{X}_{\mathrm{ui}}\·X_i}{\mathrm{\Σ}{X}_i}$

$Y_u=\frac{\mathrm{\Σ}{Y}_{\mathrm{ui}}\·X_i}{\mathrm{\Σ}{X}_i}$

The coordinate of lower-limit point L:

${\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="S2008100123044E00031.png"\; state="\{\{state\}\}">X</figure-callout>}}_1=\frac{\mathrm{\&Sigma;}{X}_{1i}\&CenterDot;X_i}{\mathrm{\&Sigma;}{X}_i}$

${\mathrm{<figure-callout\; id="1"\; label="Y"\; filenames="S2008100123044E00031.png"\; state="\{\{state\}\}">Y</figure-callout>}}_1=\frac{\mathrm{\&Sigma;}{Y}_{1i}\&CenterDot;X_i}{\mathrm{\&Sigma;}{X}_i}$

The coordinate of critical point S:

$X_s=\frac{\mathrm{\&Sigma;}{X}_{\mathrm{si}}\&CenterDot;X_i}{\mathrm{\&Sigma;}{X}_i}$

$Y_s=\frac{\mathrm{\&Sigma;}{Y}_{\mathrm{si}}\&CenterDot;X_i}{\mathrm{\&Sigma;}{X}_i}$

In the formula

$X_{\mathrm{si}}=\frac{\mathrm{\&Sigma;}{X}_{\mathrm{sij}}\&CenterDot;\stackrel{\&OverBar;}{X_j}}{\mathrm{\&Sigma;}{X}_j}$

$Y_{\mathrm{ui}}=\frac{\mathrm{\&Sigma;}{Y}_{\mathrm{sij}}\&CenterDot;\stackrel{\&OverBar;}{X_j}}{\mathrm{\&Sigma;}{X}_j}$

(j＝1，2)

So far, can in rectangular coordinate system, draw the synthetic explosion triangle figure of fire district gas.

Be calculated as follows the horizontal ordinate of fire district's gas composition state point P:

X _p＝∑X _i

According to X _p, Y _pIn explosion triangle figure, draw the P point, can judge the explosion hazard of this fire district gas according to the subregion of danger.

The explosion triangle normalization method is Ku-Ma normalization method:

This method is blocked river horse Chu now by Polish Kuku and is drawn proposition, CH ₄Explosion triangle figure is the normalizing reference map, and an explosion gas total concentration is a horizontal ordinate, is calculated as follows the coordinate of revised gas composition state point P, can differentiate the explosion hazard of this fire district gas according to risk zoning.

${X_{\mathrm{\&rho;}}}^{\&prime;}=\frac{\mathrm{\&Sigma;}(c_i+d_i+{\mathrm{eY}}_p+f_i{\mathrm{\&alpha;\&beta;}}_i)X_i}{\mathrm{\&Sigma;}{X}_i}$

${Y_{\mathrm{\&rho;}}}^{\&prime;}=\frac{\mathrm{\&Sigma;}({c_i}^{\&prime;}+{d_i}^{\&prime;}+e^{\&prime;}{Y}_p+{f_i}^{\&prime;}{\mathrm{\&alpha;\&beta;}}_i)X_i}{\mathrm{\&Sigma;}{X}_i}$

(i＝1，2...n)

In the formula: α-CO ₂Influence coefficient to explosion triangle;

$\mathrm{\&alpha;}\frac{\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="S2008100123044E00031.png"\; state="\{\{state\}\}">X</figure-callout>}}_1}-0.03}{\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="1"\; label="X"\; filenames="S2008100123044E00031.png"\; state="\{\{state\}\}">X</figure-callout>}}_1}+\stackrel{\&OverBar;}{{\mathrm{<figure-callout\; id="2"\; label="X"\; filenames="S2008100123044E00061.png"\; state="\{\{state\}\}">X</figure-callout>}}_2}}$

β-CO ₂Influence coefficient to the P point coordinate.

$\mathrm{\&beta;}=\frac{20.93-(Y_p+0.2093\mathrm{\&Sigma;}{X}_i)}{a_i-{\mathrm{ab}}_i}$

a _i, b _i, c _i, d _i, f _i, e _i, c _i', d _i', e _i', f _i'-reduction coefficient, B2 checks in by table.

Table B2

N point coordinate X among Fig. 6 _n, Y _nFind the solution as follows:

X _n＝-20.93X _s/(X _s-20.93)

Y _n＝0

The P point is positioned at explosion triangle figure intermediate cam shape LUS's when " explosion-risk area (being the I district) ", has explosion hazard at any time, should stop operation immediately, withdraws personnel;

The P point is positioned at triangle L20.93S's when " checking explosive area (being the II district) ", should suitably increase air quantity;

When the P point is positioned at quadrilateral U100NS and " increases wind explosive area (being the III district) ", should suitably reduce air quantity;

When the P point was positioned at triangle 0N20.93 " increase and decrease wind place of safety (being the IV district) ", the increase and decrease air quantity did not all have danger.

The P point is different near the difficulty of the different decision-makings of degree of triangle LUS " explosion-risk area (being the I district) " in practice, causes the decision-making melancholy to lose the safe handling best chance sometimes, and damnous possibility is arranged.

Mine fire hazard level recognition methods at present---the dimensionless group value of Graham Sodd method of investing (Graham) measuring point fire gases mainly used in following all titles " fire hazard recognition methods ".That is:

$G=\frac{100\mathrm{<figure-callout\; id="0"\; label="CO"\; filenames="S2008100123044E00061.png,S2008100123044E00081.png"\; state="\{\{state\}\}">CO</figure-callout>}}{0.{265N}_2-O_2}$

In the formula:

N ₂＝100-(O ₂+CO ₂+CO+CH ₄+H ₂+C _mH _n)

CO, O ₂, N ₂---be respectively the CO in the return side sampled point gas appearance, O ₂, N ₂Concentration of volume percent.

The Graham Sodd method of investing coefficient is mainly used in the judgement of spontaneous combustion of coal situation.The value of Graham Sodd method of investing coefficient G in 0.7～3.0 scope for the spontaneous combustion of estimating coal and again spontaneous combustion process be significant.For each stage relevant, be suitable for following criterion based on the Graham Sodd method of investing coefficient with the coal self-heating procedure:

1. when Graham Sodd method of investing coefficient value G>=0.7 and G≤1.0, the degree of oxidation of coal increases, and the coal temperature is than the remarkable increase of primitive rock temperature, and temperature reaches 60 ℃;

2. when Graham Sodd method of investing coefficient value G>=1.0 and G≤2.0, fire hazard increases, and the coal temperature reaches more than 80 ℃, should take preventive measures;

3. when Graham Sodd method of investing coefficient value G>=2.0 and G≤3.0, the coal heating is serious, and the coal temperature reaches more than 180 ℃, must take conventional fire prevention measure;

4. when Graham Sodd method of investing coefficient value G >=3.0, almost can there be naked light in coal certainly, and the coal temperature must be taked the fire extinguishing measure more than 300 ℃;

For the temperature of spontaneous combustion of coal point, simultaneously also be 300 ℃ of the minimum temperature of fire, Graham Sodd method of investing coefficient value G=3.0.Usually the fire under the coal mine all is the fire that not exclusively develops.The incomplete development point of fire is the terminal point in fire development stage, is again the starting point that fire extinguishes the stage.

The fire hazard recognition methods can be judged index property gas content according to coal kind in addition.From the angle of gas analysis, the symbolic gas index of each coal is following:

The representative C of olefin gas ₂H ₄The oxidation that can be regarded as coal gets into the symbolic gas in self-heating stage really, under the prerequisite that has CO to exist, as long as C occurs ₂H ₄Can do the forecast of spontaneous fire of producing coal, promptly as warning index.

The appearance of alkynes gas means that coal has got into or is about to get into combustion phases, as long as detect C ₂H ₂Just can conclude the naked light that the interior existence of monitoring section has been burnt, therefore can also can be used as the index that degree is extinguished in the ignition of judgement coal spontaneous to its naked light warning index simultaneously as the coal spontaneous ignition.

Referring to the classification summary table of the coal of following Chinese Coal Classification, the sorted table of bituminous coal.

The classification summary table of coal

The sorted table of bituminous coal

The above at present general independent use of fire hazard recognition methods can not be carried out system to fire risk and judge that real-time is poor simultaneously.

Summary of the invention

For overcoming the deficiency of existing above technical disadvantages of mine gas beam tube monitoring system and existence.

The present invention provides a kind of mine gas beam tube monitoring system; It comprises that single core beam tube that centre by some terminations fixed sample device is provided with the single channel moisture trap is connected to the branch bobbin carriage; Be connected to the adapter case through being in charge of the beam tube cable again; Inserting behind the moisture trap case by Programmable Logic Controller from taking over main beam pipe pipe cable that case is made up of some single core beam tubes---PLC constitutes automatic sampling apparatus through gas circuit switching solenoid valve, the aspiration pump of electric control circuit control; Be characterized in also comprising by be linked in sequence single core beam tube of nothing oil the gas injection pump and the conversion electromagnetic valve of Controlled by Programmable Controller, the shunting needle valve that has the emptying end, exsiccator, filtrator, quantity tube, flowmeter of auto injection pipeline and form the automatic sampling apparatus that the sample preparation device constitutes; Automatic sampling apparatus connects gas chromatographic detection device analysis output data to computing machine, and computer control Programmable Logic Controller---PLC also exports testing result.

Wherein exsiccator, filtrator can be set in sequence in conversion electromagnetic valve, have between the shunting needle valve of emptying end.But exsiccator, filtrator shortening in serviceable life.

Wherein Programmable Logic Controller---PLC can substitute with integrated circuit.But measuring point number expansion difficulty, and cost height, not easy-maintaining.

Wherein can omit shunting needle valve, the flowmeter that has the emptying end simultaneously.But the automatic sampling apparatus sample introduction is unstable, and the detected gas precision can reduce.

Wherein when the disaster relief, will form the automatic sampling apparatus that the sample preparation device constitutes by be linked in sequence single core beam tube of nothing oil the gas injection pump and the conversion electromagnetic valve of Controlled by Programmable Controller, the shunting needle valve that has the emptying end, exsiccator, filtrator, quantity tube, flowmeter of auto injection pipeline; Automatic sampling apparatus connects gas chromatographic detection device analysis output data to computing machine, and computer-controlled Programmable Logic Controller---PLC, moisture trap case, gas circuit switching solenoid valve, aspiration pump are arranged on the motor-driven rescue vehicle.

Judge promptly that for overcoming present gas burst property recognition methods the explosion triangle method of gas explosion danger property in the fiery district exists in the difficulty difference that the P point is made a strategic decision near the degree difference of triangle LUS " explosion-risk area " in the practice; Sometimes cause the decision-making melancholy to lose the safe handling best chance, cause damage possible technological deficiency and deficiency are arranged.

Propose a kind of gas burst property recognition methods of mine gas beam tube monitoring system on the explosion triangle method basis of the present invention's gas explosion danger property in judging the fire district, comprised (X in the explosion triangle method ₁, Y ₁) be 100% lower-limit point L coordinate, (X _u, Y _u) be 100% upper change point U coordinate, (X _s, Y _s) be 100% critical point S coordinate, be characterized in (X ₁50, Y ₁50) be 50% lower-limit point L ₅₀Coordinate, (X _u50, Y _u50) be 50% upper change point U ₅₀Coordinate, (X _s50, Y _s50) be 50% critical point S ₅₀Coordinate, (X ₁75, Y ₁75) be 75% lower-limit point L ₇₅Coordinate, (X _u75, Y _u75) be 75% upper change point U ₇₅Coordinate, (X _s75, Y _s75) be 75% critical point S ₇₅Coordinate,

X ₁50＝X ₁/2，Y ₁50＝(20.93-Y ₁)/2+Y ₁

X _u50＝(100-X _u)/2+X _u，Y _u50＝Y _u/2

X _s50＝X _s/2，Y _s50＝Y _s/2

X ₁75＝X ₁50+X ₁50/2，Y ₁75＝(20.93-Y ₁50)-Y ₁50/2

X _u75＝(100-X _u50)/2+X _u，Y _u75＝Y _u50+Y _u50/2

X _s75＝X _s50/2×3，Y _s75＝Y _s50/2×3

When the P point is positioned at " explosion-risk area " of explosion triangle figure intermediate cam shape LUS, there is explosion hazard at any time, is one-level decision-making district.Should stop operation immediately, withdraw personnel.

The P point is positioned at polygon UU ₇₅S ₇₅L ₇₅The LS district is secondary decision-making district.Whether get into this measuring point zone by the chief engineer of mineral bureau with rescue team leader decision-maker.

The P point is positioned at polygon U ₇₅U ₅₀S ₅₀L ₅₀L ₇₅S ₇₅The district is three grades of decision-making districts.Whether get into this measuring point zone by the ore deposit chief engineer with rescue team leader decision-maker.

(X wherein ₁25, Y ₁25) be 25% lower-limit point L ₂₅Coordinate, (X _u25, Y _u25) be 25% upper change point U ₂₅Coordinate, (X _s25, Y _s25) be 25% critical point S ₂₅Coordinate,

X ₁25＝X ₁/4；Y ₁25＝(20.93-Y ₁)/4×3+Y ₁

X _u25＝(100-X _u)/4×3+X _u；Y _u25＝Y _u/4；

X _s25＝X _s/4；Y _s25＝Y _s/4

The P point is positioned at polygon U ₅₀U ₂₅S ₂₅L ₂₅L ₅₀S ₅₀The district is level Four decision-making district.Whether get into this measuring point zone by rescue team leader decision-maker.

(X wherein ₁75, Y ₁75) be 75% lower-limit point L ₇₅Coordinate, (X _u75, Y _u75) be 75% upper change point U ₇₅Coordinate, (X _s75, Y _s75) be 75% critical point S ₇₅Coordinate can be divided in other ratio.

Programming realizes in the computing machine of above technology in a kind of mine gas beam tube monitoring system.

For overcoming the general independent use of present fire hazard recognition methods, can not carry out system to fire risk and judge, simultaneously the technological deficiency and the deficiency of real-time difference.

On the basis that the present invention is based on the criterion of Graham Sodd method of investing coefficient and index property gas content is judged according to coal kind; A kind of fire hazard recognition methods of mine gas beam tube monitoring system has been proposed; Comprise the Graham Sodd method of investing coefficient criterion, according to coal kind index property gas content is judged, be characterized in: judge that content and order do

When coal is other,

C ₂H ₄Percentage>=0.00001% o'clock, the coal temperature reaches more than 150 ℃, should the measure of employing prevention property,

When Graham Sodd method of investing coefficient value G>=0.7 and G≤1.0, the degree of oxidation of coal increases, and the coal temperature is than the remarkable increase of primitive rock temperature, and the coal temperature reaches 60 ℃,

When Graham Sodd method of investing coefficient value G>=1.0 and G≤2.0, fire hazard increases, and the coal temperature reaches more than 80 ℃, should take preventive measures,

When Graham Sodd method of investing coefficient value G>=2.0 and G≤3.0, the coal heating is serious, and the coal temperature reaches more than 180 ℃, must take conventional fire prevention measure

When Graham Sodd method of investing coefficient value G >=3.0, almost can there be naked light in coal certainly, and the coal temperature must be taked the fire extinguishing measure more than 300 ℃,

When coal is brown coal/long-flame coal/bottle coal/rich coal,

When Graham Sodd method of investing coefficient value G>=0.7 and G≤1.0, the degree of oxidation of coal increases, and temperature is than the significantly increase of primitive rock temperature, and temperature reaches 60 ℃,

When Graham Sodd method of investing coefficient value G>=1.0 and G≤2.0, fire hazard increases, more than the coal temperature reaches ℃, should take preventive measures,

When Graham Sodd method of investing coefficient value G>=2.0 and G≤3.0, the coal heating is serious, and the coal temperature reaches more than 180 ℃, must take conventional fire prevention measure,

When Graham Sodd method of investing coefficient value G >=3.0, almost can there be naked light in coal certainly, and the coal temperature must be taked the fire extinguishing measure more than 300 ℃.

C ₂H ₄Percentage>=0.00001% o'clock, the coal temperature reaches 110 ℃-180 ℃, and something must be done to,

C ₂H ₂Percentage>=0.00001% o'clock, existing naked light must be taked the fire extinguishing measure,

Programming realizes in the computing machine of above technology in a kind of mine gas beam tube monitoring system.

The determination methods of comprehensive above-mentioned judgement content and order can obtain seven kinds of fire hazard degree results.

A kind of mine gas beam tube monitoring system of the present invention, particularly the beneficial effect of first embodiment is, exsiccator, filtrator long service life, the expansion of measuring point number is convenient, and cost is low, and the sampling device sample introduction is stable, and the detected gas precision is high.

The gas burst property recognition methods of a kind of mine gas beam tube monitoring system of the present invention; Clear and definite according to the P point in practice near the different decision-makings of degree of triangle LUS " explosion-risk area ", decision-making safe handling classification is provided and has guaranteed the timely of the production and the disaster relief.

The fire hazard recognition methods of a kind of mine gas beam tube monitoring system of the present invention is carried out system to fire risk and is judged, real judgement when reaching is for decision-making provides timely technical guarantee.

Mine gas beam tube monitoring system of the present invention and gas burst property and fire hazard recognition methods; Programming realizes in the computing machine of method part in a kind of mine gas beam tube monitoring system; Can detect mine gas in real time; Draw gas burst property and fire hazard identification form and graphic result simultaneously, for decision-making provides timely technical guarantee.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the present invention is further specified.

Fig. 1 structural principle synoptic diagram of the present invention.

Fig. 2 first embodiment of the invention automatic sampling apparatus principle schematic.

Fig. 3 Programmable Logic Controller of the present invention---PLC control principle figure.

Fig. 4 Programmable Logic Controller of the present invention---the gas circuit switching principle figure of PLC control.

Programmable Logic Controller---the PLC expansion module schematic diagram that Fig. 5 second embodiment of the invention is used.

Fig. 6 third embodiment of the invention principle schematic.

Fig. 7 fourth embodiment of the invention principle schematic.

Fig. 8 third embodiment of the invention is figure as a result.

0,1,2,3,4,5,6,7 is Programmable Logic Controller among the figure---PLC expansion module control end, 10. auto injection pipeline, 11. electric control circuits, 12. no oily gas injection pumps, 13. conversion electromagnetic valves; 14. pilot lamp, 15. shunting needle valves, 16. shunting needle valve emptying ends, 17. exsiccators, 18. filtrators; 19. quantity tube, 20. solid-state relays, 21. gas chromatographic detection devices, 22. computing machines, 23. flowmeters; 30. sampling thief, 31. single channel moisture traps, 32. single core beam tubes, 33. take over case, 34. main beam pipe pipe cables; 35. the moisture trap case, 36. fens bobbin carriages, 370. tube bank pipe cables, 38. Programmable Logic Controllers---PLC, 39. aspiration pumps; 40. Programmable Logic Controller---PLC connection terminal, 42. gas circuit switching solenoid valves, 45. control loop power supplys, 46. Programmable Logic Controllers---pLC power supply, 111. sample preparation devices; 114. Programmable Logic Controller---the gas circuit switching solenoid valve pilot lamp of PLC control, 121. gas injection devices, 131 gas circuit conversion equipments, 421. gas circuit switching device shifters.

Embodiment

First embodiment; Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4; A kind of mine gas beam tube monitoring system; It comprises that single core beam tube 32 that centre by some terminations fixed sample device 30 is provided with single channel moisture trap 31 is connected to branch bobbin carriage 36; Be connected to adapter case 33 through being in charge of beam tube cable 37 again; The main beam pipe pipe cable 34 that is made up of some single core beam tubes from adapter case 33 inserts moisture trap casees 35 backs by Programmable Logic Controller---and PLC38 is through gas circuit switching solenoid valve 42, the aspiration pump 39 formation automatic sampling apparatus of electric control circuit 11 controls; Be characterized in also comprising by the be linked in sequence nothing oil gas injection pump 12 of Controlled by Programmable Controller of auto injection pipeline 10 and form the automatic sampling apparatus that sample preparation device 111 constitutes with single core beam tube of conversion electromagnetic valve 13, the shunting needle valve 15 that has emptying end 16, exsiccator 17, filtrator 18, quantity tube 19, flowmeter 23; Automatic sampling apparatus connects gas chromatographic detection device 21 and analyzes output data to computing machine, and computer control Programmable Logic Controller---PLC38 also exports testing result.

Wherein gas chromatographic detection device 21 is gas chromatograph GC6820; Programmable Logic Controller---PLC38 is S7-200PLC; Be the control loop power supply by control loop power supply 45;---PLC power supply 46 is a Programmable Logic Controller---PLC power supply by Programmable Logic Controller; The gas circuit switching solenoid valve pilot lamp 114 of Programmable Logic Controller---the gas circuit switching device shifter 421 of PLC38 control is mainly by gas circuit switching solenoid valve 42, solid-state relay 20, Programmable Logic Controller---PLC control constitutes; Gas circuit conversion equipment 131 mainly is made up of conversion electromagnetic valve 13, solid-state relay, pilot lamp, and gas injection device 121 mainly is made up of solid-state relay 20, no oily gas injection pump 12, pilot lamp 14.

Second embodiment; Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4; A kind of mine gas beam tube monitoring system; It comprises that single core beam tube 32 that centre by some terminations fixed sample device 30 is provided with single channel moisture trap 31 is connected to branch bobbin carriage 36; Be connected to adapter case 33 through being in charge of beam tube cable 37 again; The main beam pipe pipe cable 34 that is made up of some single core beam tubes from adapter case 33 inserts moisture trap casees 35 backs by Programmable Logic Controller---and PLC38 is through gas circuit switching solenoid valve 42, the aspiration pump 39 formation automatic sampling apparatus of electric control circuit 11 controls; Be characterized in also comprising by the be linked in sequence nothing oil gas injection pump 12 of Controlled by Programmable Controller of auto injection pipeline 10 and form the automatic sampling apparatus that sample preparation device 111 constitutes with single core beam tube of conversion electromagnetic valve 13, the shunting needle valve 15 that has emptying end 16, exsiccator 17, filtrator 18, quantity tube 19, flowmeter 23; Automatic sampling apparatus connects gas chromatographic detection device 21 and analyzes output data to computing machine, and computer control Programmable Logic Controller---PLC38 also exports testing result.

Wherein gas chromatographic detection device 21 is gas chromatograph GC3000A; Programmable Logic Controller---PLC38 is S7-200PLC; Be the control loop power supply by control loop power supply 45;---PLC power supply 46 is a Programmable Logic Controller---PLC power supply by Programmable Logic Controller; The gas circuit switching solenoid valve pilot lamp 114 of Programmable Logic Controller---the gas circuit switching device shifter 421 of PLC38 control is mainly by gas circuit switching solenoid valve 42, solid-state relay 20, Programmable Logic Controller---PLC control constitutes; Gas circuit conversion equipment 131 mainly is made up of conversion electromagnetic valve 13, solid-state relay, pilot lamp, and gas injection device 121 mainly is made up of solid-state relay 20, no oily gas injection pump 12, pilot lamp 14.

At Programmable Logic Controller---when PLC38 control measuring point number is not enough; Can expand; See Fig. 5; Referring to Fig. 4, the gas circuit switching solenoid valve pilot lamp 114 of Programmable Logic Controller---the gas circuit switching device shifter 421 of PLC38 control is mainly by gas circuit switching solenoid valve 42, solid-state relay 20, Programmable Logic Controller---PLC control constitutes.---the PLC connection terminal constitutes Programmable Logic Controller---PLC expansion control module, every increase-individual module just increases i.e. eight measuring points of octuple mainly by gas circuit switching device shifter 421, control loop power supply 45, Programmable Logic Controller.

Introduce the principle of work of first embodiment below understanding for ease;

Sampling thief 30 is hung at point position; Be provided with in the centre of single core beam tube 32 and be connected to branch bobbin carriage 36 after single channel moisture trap 31 carries out gas-water separation; Be connected to and take over case 33 through being in charge of beam tube cable 37 again, after taking over main beam pipe pipe cable 34 that case 33 is made up of some single core beam tubes and inserting moisture trap casees 35 and carry out gas-water separation, by Programmable Logic Controller---gas circuit switching solenoid valve 42, the aspiration pump 39 of PLC38 through electric control circuit 11 controls constitutes automatic sampling apparatus and carries out the measuring point gas collecting; Aspiration pump 39 is worked at System production time all the time; Its effect is that all tested point gases are extracted out, and the gas circuit switching solenoid valve 42 that connects when the beam tube of one of them measuring point sends instruction by computing machine and passes through Programmable Logic Controller---when PLC38 switches to duty, and the F of gas circuit switching solenoid valve 42 → i conducting; Programmable Logic Controller---the gas circuit switching solenoid valve pilot lamp 114 of PLC control is bright; The gas injection pump 12 of Programmable Logic Controller---PLC38 control, conversion electromagnetic valve 13 work C → B conductings, pilot lamp is bright, when resetting after gas content detection first or system stop transport; Inject tested gas by gas injection pump 12; Through the tested gas emptying of shunting needle valve emptying end 16 splitter sections of shunting needle valve 15, a part of tested gas gets into quantity tube 19 through exsiccator 17 dryings after filtrator 18 filters, through flowmeter 23 measurement of discharges; Flowmeter 23 flows are regulated through shunting needle valve 15; When reaching 0.1～50 milliliters/second flow range, conversion electromagnetic valve 13C → A conducting is tested gas emptying, and gas chromatographic detection device 21 is that the sluice valve in the gas chromatograph is opened the gas of getting in the quantity tube 19 and carried out content detection.Testing result is carried in computing machine 22 after through data-switching, by computing machine 22 each gas content examining report of output.Carry out gas explosion danger property and flammable risk analysis simultaneously, export analysis result in real time.For producing or disaster relief programs provide the decision analysis result.

When continue detecting certain road gas content, no longer carry out flow regulation.Pass through Programmable Logic Controller by computing machine 22 programmings---device work such as PLC38 control gas circuit switching solenoid valve 42, gas injection pump 12, conversion electromagnetic valve 13.Realize detecting in real time.Equally, testing result is carried in computing machine 22 after through data-switching, by computing machine 22 each gas content examining report of output.Carry out gas explosion danger property and flammable risk analysis simultaneously, export analysis result in real time.For producing or disaster relief programs provide the decision analysis result.

The 3rd embodiment, referring to Fig. 6, Fig. 8, Fig. 1, a kind of gas burst property recognition methods of mine gas beam tube monitoring system comprises (X in the explosion triangle method ₁, Y ₁) be 100% lower-limit point L coordinate, (X _u, Y _u) be 100% upper change point U coordinate, (X _s, Y _s) be 100% critical point S coordinate, be characterized in (X ₁50, Y ₁50) be 50% lower-limit point L ₅₀Coordinate, (X _u50, Y _u50) be 50% upper change point U ₅₀Coordinate, (X _s50, Y _s50) be 50% critical point S ₅₀Coordinate, (X ₁75, Y ₁75) be 75% lower-limit point L ₇₅Coordinate, (X _u75, Y _u75) be 75% upper change point U ₇₅Coordinate, (X _s75, Y _s75) be 75% critical point S ₇₅Coordinate,

X ₁50＝X ₁/2，Y ₁50＝(20.93-Y ₁)/2+Y ₁

X _u50＝(100-X _u)/2+X _u，Y _u50＝Y _u/2

X _s50＝X _s/2，Y _s50＝Y _s/2

X ₁75＝X ₁50+X ₁50/2，Y ₁75＝(20.93-Y ₁50)-Y ₁50/2

X _u75＝(100-X _u50)/2+X _u，Y _u75＝Y _u50+Y _u50/2

X _s75＝X _s50/2×3，Y _s75＝Y _s50/2×3

When the P point is positioned at " explosion-risk area " of explosion triangle figure intermediate cam shape LUS, there is explosion hazard at any time, is one-level decision-making district.Should stop operation immediately, withdraw personnel.

The P point is positioned at polygon UU ₇₅S ₇₅L ₇₅The LS district is secondary decision-making district.Whether get into this measuring point zone by the chief engineer of mineral bureau with rescue team leader decision-maker.

The P point is positioned at polygon U ₇₅U ₅₀S ₅₀L ₅₀L ₇₅S ₇₅The district is three grades of decision-making districts.Whether get into this measuring point zone by the ore deposit chief engineer with rescue team leader decision-maker.

Programming realizes in the computing machine 22 of above technology in a kind of mine gas beam tube monitoring system

P point " stain " among Fig. 8 is positioned at no classification decision-making district.Personnel can get into this measuring point zone, and being in " increasing the wind explosive area " simultaneously is the III district, and air quantity should suitably be reduced in the position, measured point.

The 4th embodiment, referring to Fig. 7, Fig. 8, Fig. 1, a kind of gas burst property recognition methods of mine gas beam tube monitoring system comprises (X in the explosion triangle method ₁, Y ₁) be 100% lower-limit point L coordinate, (X _u, Y _u) be 100% upper change point U coordinate, (X _s, Y _s) be 100% critical point S coordinate, be characterized in (X ₁50, Y ₁50) be 50% lower-limit point L ₅₀Coordinate, (X _u50, Y _u50) be 50% upper change point U ₅₀Coordinate, (X _s50, Y _s50) be 50% critical point S ₅₀Coordinate, (X ₁75, Y ₁75) be 75% lower-limit point L ₇₅Coordinate, (X _u75, Y _u75) be 75% upper change point U ₇₅Coordinate, (X _s75, Y _s75) be 75% critical point S ₇₅Coordinate,

X ₁50＝X ₁/2，Y ₁50＝(20.93-Y ₁)/2+Y ₁

X _u50＝(100-X _u)/2+X _u，Y _u50＝Y _u/2

X _s50＝X _s/2，Y _s50＝Y _s/2

X ₁75＝X ₁50+X ₁50/2，Y ₁75＝(20.93-Y ₁50)-Y ₁50/2

X _u75＝(100-X _u50)/2+X _u，Y _u75＝Y _u50+Y _u50/2

X _s75＝X _s50/2×3，Y _s75＝Y _s50/2×3

(X ₁25, Y ₁25) be 25% lower-limit point L ₂₅Coordinate, (X _u25, Y _u25) be 25% upper change point U ₂₅Coordinate, (X _s25, Y _s25) be 25% critical point S ₂₅Coordinate,

X ₁25＝X ₁/4；Y ₁25＝(20.93-Y ₁)/4×3+Y ₁

X _u25＝(100-X _u)/4×3+X _u；Y _u25＝Y _u/4；

X _s25＝X _s/4；Y _s25＝Y _s/4

When the P point is positioned at " explosion-risk area " of explosion triangle figure intermediate cam shape LUS, there is explosion hazard at any time, is one-level decision-making district.Should stop operation immediately, withdraw personnel.

The P point is positioned at polygon UU ₇₅S ₇₅L ₇₅The LS district is secondary decision-making district.Whether get into this measuring point zone by the chief engineer of mineral bureau with rescue team leader decision-maker.

The P point is positioned at polygon U ₇₅U ₅₀S ₅₀L ₅₀L ₇₅S ₇₅The district is three grades of decision-making districts.Whether get into this measuring point zone by the ore deposit chief engineer with rescue team leader decision-maker.

The P point is positioned at polygon U ₅₀U ₂₅S ₂₅L ₂₅L ₅₀S ₅₀The district is level Four decision-making district.Whether rescue team leader decision-maker gets into this measuring point zone.

Programming realizes in the computing machine 22 of above technology in a kind of mine gas beam tube monitoring system.

P point " stain " among Fig. 8 is positioned at no classification decision-making district.Disaster relief personnel can get into this measuring point zone, and being in " increasing the wind explosive area " simultaneously is the III district, and air quantity should suitably be reduced in the position, measured point.

The 5th embodiment; Referring to " data sheet "; A kind of fire hazard recognition methods of mine gas beam tube monitoring system, comprise blast Graham Sodd method of investing coefficient criterion, according to coal kind index property gas content is judged, be characterized in: judge that content and order do

When coal is other,

C ₂H ₄Percentage>=0.00001% o'clock, the coal temperature reaches more than 150 ℃, should the measure of employing prevention property,

When Graham Sodd method of investing coefficient value G>=0.7 and G≤1.0, the degree of oxidation of coal increases, and the coal temperature is than the remarkable increase of primitive rock temperature, and the coal temperature reaches 60 ℃,

When Graham Sodd method of investing coefficient value G>=1.0 and G≤2.0, fire hazard increases, and the coal temperature reaches more than 80 ℃, should take preventive measures,

When Graham Sodd method of investing coefficient value G>=2.0 and G≤3.0, the coal heating is serious, and the coal temperature reaches more than 180 ℃, must take conventional fire prevention measure

When Graham Sodd method of investing coefficient value G >=3.0, almost can there be naked light in coal certainly, and the coal temperature must be taked the fire extinguishing measure more than 300 ℃,

When coal is brown coal/long-flame coal/bottle coal/rich coal,

When Graham Sodd method of investing coefficient value G>=0.7 and G≤1.0, the degree of oxidation of coal increases, and the coal temperature is than the remarkable increase of primitive rock temperature, and temperature reaches 60 ℃,

When Graham Sodd method of investing coefficient value G>=1.0 and G≤2.0, fire hazard increases, and the coal temperature reaches more than 80 ℃, should take preventive measures,

When Graham Sodd method of investing coefficient value G>=2.0 and G≤3.0, the coal heating is serious, and the coal temperature reaches more than 180 ℃, must take conventional fire prevention measure,

When Graham Sodd method of investing coefficient value G >=3.0, almost can there be naked light in coal certainly, and the coal temperature must be taked the fire extinguishing measure more than 300 ℃.

C ₂H ₄Percentage>=0.00001% o'clock, the coal temperature reaches 110 ℃-180 ℃, and something must be done to,

C ₂H ₂During percentage>=0.00001%m, existing naked light must be taked the fire extinguishing measure.

Programming realizes in the computing machine 22 of above technology in a kind of mine gas beam tube monitoring system.Referring to nextpage " data sheet ", there are six passages to have naked light in " fire hazard " item in " data sheet " of output, must take the fire extinguishing measure.

Claims (8)

1. mine gas beam tube monitoring system; It comprises that single core beam tube that centre by some terminations fixed sample device is provided with the single channel moisture trap is connected to the branch bobbin carriage; Be connected to the adapter case through being in charge of the beam tube cable again; Inserting behind the moisture trap case by Programmable Logic Controller from taking over main beam pipe pipe cable that case is made up of some single core beam tubes---PLC constitutes automatic sampling apparatus through gas circuit switching solenoid valve, the aspiration pump of electric control circuit control; It is characterized in that: also comprise by be linked in sequence single core beam tube of nothing oil the gas injection pump and the conversion electromagnetic valve of Controlled by Programmable Controller, the shunting needle valve that has the emptying end, exsiccator, filtrator, quantity tube, flowmeter of auto injection pipeline and form the automatic sampling apparatus that the sample preparation device constitutes; Automatic sampling apparatus connects gas chromatographic detection device analysis output data to computing machine, and computer control Programmable Logic Controller---PLC also exports testing result.

2. according to the said a kind of mine gas beam tube monitoring system of claim 1, it is characterized in that: exsiccator, filtrator are set in sequence in conversion electromagnetic valve, have between the shunting needle valve of emptying end.

3. according to the said a kind of mine gas beam tube monitoring system of claim 1, it is characterized in that: Programmable Logic Controller---PLC substitutes with integrated circuit.

4. according to the said a kind of mine gas beam tube monitoring system of claim 1, it is characterized in that: omit the shunting needle valve, the flowmeter that have the emptying end.

5. according to the said a kind of mine gas beam tube monitoring system of claim 1; It is characterized in that: when the disaster relief, will form the automatic sampling apparatus that the sample preparation device constitutes by be linked in sequence single core beam tube of nothing oil the gas injection pump and the conversion electromagnetic valve of Controlled by Programmable Controller, the shunting needle valve that has the emptying end, exsiccator, filtrator, quantity tube, flowmeter of auto injection pipeline; Automatic sampling apparatus connects gas chromatographic detection device analysis output data to computing machine, and computer-controlled Programmable Logic Controller---PLC, moisture trap case, gas circuit switching solenoid valve, aspiration pump are arranged on the motor-driven rescue vehicle.

6. according to the said a kind of mine gas beam tube monitoring system of claim 2, it is characterized in that: Programmable Logic Controller---PLC substitutes with integrated circuit.

7. according to the said a kind of mine gas beam tube monitoring system of claim 3, it is characterized in that: omit the shunting needle valve, the flowmeter that have the emptying end.

8. according to claim 2 or 3 or 4 said a kind of mine gas beam tube monitoring systems, it is characterized in that: when the disaster relief, automatic sampling apparatus, gas chromatographic detection device, computing machine, moisture trap case, gas circuit switching solenoid valve, aspiration pump are arranged on the motor-driven rescue vehicle.

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