CN113586153B - Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction - Google Patents
Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction Download PDFInfo
- Publication number
- CN113586153B CN113586153B CN202110891829.5A CN202110891829A CN113586153B CN 113586153 B CN113586153 B CN 113586153B CN 202110891829 A CN202110891829 A CN 202110891829A CN 113586153 B CN113586153 B CN 113586153B
- Authority
- CN
- China
- Prior art keywords
- temperature
- coal
- determining
- spontaneous combustion
- monitoring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 239000003245 coal Substances 0.000 title claims abstract description 261
- 238000000605 extraction Methods 0.000 title claims abstract description 139
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 102
- 230000002269 spontaneous effect Effects 0.000 title claims abstract description 102
- 238000012544 monitoring process Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 55
- 230000001939 inductive effect Effects 0.000 claims abstract description 19
- 238000012806 monitoring device Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 12
- 239000010959 steel Substances 0.000 claims description 12
- 125000002947 alkylene group Chemical group 0.000 claims description 8
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 8
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 claims description 7
- 239000005977 Ethylene Substances 0.000 claims description 7
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 claims description 7
- HSFWRNGVRCDJHI-UHFFFAOYSA-N alpha-acetylene Natural products C#C HSFWRNGVRCDJHI-UHFFFAOYSA-N 0.000 claims description 6
- 125000005677 ethinylene group Chemical group [*:2]C#C[*:1] 0.000 claims description 6
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 claims description 5
- 238000009529 body temperature measurement Methods 0.000 claims description 3
- 230000002265 prevention Effects 0.000 abstract description 8
- 239000007789 gas Substances 0.000 description 98
- 230000003647 oxidation Effects 0.000 description 23
- 238000007254 oxidation reaction Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 16
- 230000001965 increasing effect Effects 0.000 description 9
- 238000005553 drilling Methods 0.000 description 7
- 238000004590 computer program Methods 0.000 description 6
- 229910052799 carbon Inorganic materials 0.000 description 5
- 230000006870 function Effects 0.000 description 5
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 150000001336 alkenes Chemical class 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 description 3
- 150000001335 aliphatic alkanes Chemical class 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000010883 coal ash Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F5/00—Means or methods for preventing, binding, depositing, or removing dust; Preventing explosions or fires
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The invention provides a monitoring method and a device for inducing spontaneous combustion of coal body by coal bed gas extraction, and relates to the technical field of coal mine fire prediction, wherein the method comprises the following steps: monitoring the temperature of each temperature measuring point in the coal bed gas extraction bundle, and monitoring the value corresponding to the prediction index in the extraction drill hole in real time; determining the spontaneous combustion position of the extraction drill hole according to the temperature; and determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the numerical value corresponding to the prediction index. Therefore, the method realizes real-time and accurate monitoring of spontaneous combustion of coal body induced by coal bed gas extraction, and can further perform prevention work in advance according to the monitoring result so as to guarantee coal mine safety in the coal bed gas extraction process.
Description
Technical Field
The disclosure relates to the technical field of coal mine fire prediction, in particular to a method and a device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction.
Background
Along with the increasing of the mining depth of the mine, the gas content of the coal bed is increased, the gas pressure is increased, and the gas permeability coefficient of the coal bed is reduced, so that the difficulty of gas extraction is increased. The measure of increasing the extraction strength correspondingly increases the gas leakage degree of the gas extraction, thereby intensifying the spontaneous combustion of the fracture coal around the bedding gas extraction drill hole. The coal spontaneous combustion induced by coal bed gas extraction is monitored, and the method has a great effect on preventing the problem of spontaneous combustion of the drill hole induced by gas extraction and preventing and controlling coal spontaneous combustion.
Disclosure of Invention
The present disclosure is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the method and the device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction are provided, so that the spontaneous combustion of the coal body induced by coal bed gas extraction can be accurately monitored in real time, prevention work can be performed in advance according to a monitoring result, and the coal mine safety in the coal bed gas extraction process is guaranteed.
The embodiment of the first aspect of the disclosure provides a method for monitoring spontaneous combustion of coal body induced by coal bed gas extraction, which comprises the following steps: monitoring the temperature of each temperature measuring point in the coal bed gas extraction bundle, and monitoring the value corresponding to the prediction index in the extraction drill hole in real time; determining the spontaneous combustion ignition position of the extraction drill hole according to the temperature; and determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the numerical value corresponding to the prediction index.
According to the monitoring method for inducing spontaneous combustion of coal body by coal bed gas extraction, the temperature of each temperature measuring point in the coal bed gas extraction bundle is monitored, the numerical value corresponding to the prediction index in the extraction drill hole is monitored in real time, the spontaneous combustion ignition position of the extraction drill hole is determined according to the temperature, the severity of spontaneous combustion ignition of the extraction drill hole is determined according to the numerical value corresponding to the prediction index, real-time and accurate monitoring on the spontaneous combustion of the coal body induced by coal bed gas extraction is achieved, prevention work can be performed in advance according to the monitoring result, and coal mine safety in the coal bed gas extraction process is guaranteed.
In addition, the method for monitoring spontaneous combustion of coal body induced by coal bed gas extraction provided by the embodiment of the first aspect of the disclosure may further have the following additional technical features:
according to one embodiment of the disclosure, the determining the position of spontaneous combustion and ignition of the extraction drill hole according to the temperature comprises: judging whether the temperature of each temperature measuring point in the beam tube is greater than a preset temperature threshold value or not; and determining the position of the temperature measuring point with the corresponding temperature larger than the preset temperature threshold value as the position of spontaneous combustion of the extraction drill hole.
According to an embodiment of the disclosure, determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the numerical value corresponding to the prediction index includes: determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index; and determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the coal temperature of the coal bed.
According to an embodiment of the present disclosure, the determining the coal temperature of the coal seam according to the value corresponding to the prediction index includes: determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index and the corresponding relation between the numerical value corresponding to the prediction index and the coal temperature; or when the value corresponding to the prediction index exceeds a preset value, determining that the coal temperature of the coal bed reaches a preset temperature.
According to an embodiment of the present disclosure, the prediction index includes at least one of the following indexes: carbon monoxide concentration, ethylene concentration, propylene concentration, acetylene concentration, and alkylene ratio.
The embodiment of the second aspect of the disclosure provides a monitoring device for inducing spontaneous combustion of coal body by coal bed gas extraction, which comprises: the monitoring module is used for monitoring the temperature of each temperature measuring point in the coal bed gas extraction bundle pipe and monitoring the numerical value corresponding to the prediction index in the extraction drill hole in real time; the first determining module is used for determining the spontaneous combustion ignition position of the extraction drill hole according to the temperature; and the second determination module is used for determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the numerical value corresponding to the prediction index.
According to the monitoring device for inducing spontaneous combustion of coal body in coal bed gas extraction, the temperature of each temperature measuring point in the coal bed gas extraction bundle is monitored, the numerical value corresponding to the prediction index in the extraction drill hole is monitored in real time, the spontaneous combustion ignition position of the extraction drill hole is determined according to the temperature, the severity of the spontaneous combustion ignition of the extraction drill hole is determined according to the numerical value corresponding to the prediction index, real-time and accurate monitoring on the spontaneous combustion of the coal body induced by the coal bed gas extraction is achieved, prevention work can be performed in advance according to the monitoring result, and the coal mine safety in the coal bed gas extraction process is guaranteed.
In addition, the monitoring device for inducing spontaneous combustion of coal body in coal bed gas extraction, which is provided by the embodiment of the second aspect of the disclosure, may further have the following additional technical features:
according to an embodiment of the present disclosure, the first determining module includes: the judging unit is used for judging whether the temperature of each temperature measuring point in the beam tube is greater than a preset temperature threshold value or not; and the first determining unit is used for determining the position of the temperature measuring point with the corresponding temperature being greater than the preset temperature threshold value as the position of spontaneous combustion and ignition of the extraction drill hole.
According to an embodiment of the disclosure, the second determining module includes: the second determining unit is used for determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index; and the third determining unit is used for determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the coal temperature of the coal bed.
According to an embodiment of the present disclosure, the second determining unit is specifically configured to: determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index and the corresponding relation between the numerical value corresponding to the prediction index and the coal temperature; or when the value corresponding to the prediction index exceeds a preset value, determining that the coal temperature of the coal bed reaches a preset temperature.
According to an embodiment of the present disclosure, the prediction index includes at least one of the following indexes: carbon monoxide concentration, ethylene concentration, propylene concentration, acetylene concentration, and alkylene ratio.
An embodiment of a third aspect of the present disclosure provides an electronic device, including: a processor; a memory for storing processor-executable instructions; the processor is configured to execute the instructions to implement the method for monitoring spontaneous combustion of coal bed gas extraction induced coal body in the embodiment of the first aspect.
A fourth aspect of the present disclosure provides a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions are configured to cause the computer to execute the method for monitoring spontaneous combustion of coal body induced by coal seam gas extraction described in the first aspect.
A fifth aspect of the present disclosure provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for monitoring spontaneous combustion of coal body induced by coal bed gas extraction described in the embodiment of the first aspect is implemented.
Additional aspects and advantages of the disclosure will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the disclosure.
Drawings
The foregoing and/or additional aspects and advantages of the present disclosure will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flow chart of a monitoring method for coal seam gas extraction induced coal spontaneous combustion according to an embodiment of the disclosure;
FIG. 2 is a schematic view of a monitoring point arrangement according to one embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a temperature sensor arrangement according to one embodiment of the present disclosure;
FIG. 4 is a schematic diagram of the relationship between CO concentration and coal temperature in a coal thermal oxidation process according to one embodiment of the present disclosure;
FIG. 5 is a schematic illustration of a relationship between olefin gas and coal temperature for a coal thermal oxidation process according to one embodiment of the disclosure;
FIG. 6 is a schematic representation of a coal auto-ignition process C according to one embodiment of the present disclosure 2 H 4 /C 2 H 6 A schematic of the relationship between ratio and coal temperature;
fig. 7 is a block schematic diagram of a monitoring device for coal seam gas extraction induced coal spontaneous combustion according to an embodiment of the disclosure.
Detailed Description
Reference will now be made in detail to the embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be illustrative of the present disclosure, and should not be construed as limiting the present disclosure.
In order to realize real-time and accurate monitoring of spontaneous combustion of coal body induced by coal bed gas extraction, the embodiment of the disclosure provides a monitoring method for inducing spontaneous combustion of coal body by coal bed gas extraction, which comprises the steps of monitoring the temperature of each temperature measuring point in a coal bed gas extraction bundle, monitoring a numerical value corresponding to a prediction index in an extraction drill hole in real time, and determining the spontaneous combustion ignition position of the extraction drill hole according to the temperature; according to the numerical value corresponding to the prediction index, the severity of spontaneous combustion and ignition of the extraction drill hole is determined, so that the spontaneous combustion of the coal body induced by coal bed gas extraction is accurately monitored in real time, and prevention work can be performed in advance according to the monitoring result, so that the coal mine safety in the coal bed gas extraction process is guaranteed.
The following describes a method and a device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction according to an embodiment of the disclosure with reference to the accompanying drawings.
Fig. 1 is a flowchart of a monitoring method for coal seam gas extraction induced coal spontaneous combustion according to an embodiment of the disclosure.
As shown in fig. 1, the method for monitoring spontaneous combustion of coal body induced by coal seam gas extraction according to the embodiment of the disclosure includes the following steps:
and 101, monitoring the temperature of each temperature measuring point in the coal bed gas extraction bundle pipe, and monitoring the numerical value corresponding to the prediction index in the extraction drill hole in real time.
The monitoring method for inducing spontaneous combustion of coal body by coal bed gas extraction according to the embodiment of the disclosure can be executed by the monitoring device for inducing spontaneous combustion of coal body by coal bed gas extraction according to the embodiment of the disclosure, which is hereinafter referred to as a monitoring device for short. The electronic device may be any device, such as a computer, capable of executing a monitoring method for inducing spontaneous combustion of coal body in coal seam gas extraction, which is not limited in this disclosure.
In an exemplary embodiment, monitoring points can be set in a preset range of a coal bed gas extraction borehole, a seamless steel pipe is buried in the monitoring points, and the temperature of each temperature measuring point in the coal bed gas extraction beam is monitored by using a sensor and a temperature measuring conducting wire which are arranged at each temperature measuring point in the seamless steel pipe. The preset range may be set as required, which is not limited by the present disclosure.
In an exemplary embodiment, a middle roadway of a certain coal mine working face is taken as an example, wherein the coal mine extraction drilling parameters are the hole sealing length of 8m (meters), the hole sealing depth of 15m, the extraction negative pressure of-23 kPa (kilopascal), and a gas extraction drilling hole adopts a two-plugging one-injection hole sealing process. 2 monitoring points can be arranged on the lower side of the middle roadway of the coal mine working face, for example, the monitoring points are respectively arranged at the positions 0.5m beside the extraction drill hole, as shown in fig. 2. Wherein, the hole diameter of the drilling at the monitoring point can be 42mm (millimeter), the drilling depth can be 13m, and the hole sealing length can be 6 meters.
In addition, 6 temperature sensors, one temperature measuring instrument, one temperature measuring lead wire of 9m, 11m and 13m, one seamless steel pipe of 13.5m, two pieces of a casing of the injection hole packer 1 and cement slurry can be prepared. The operational procedure for monitoring the borehole placement is: drilling a measuring point drilling depth 13m of 42mm by using a handheld air drill, and blowing out coal ash in the drilled hole by using air after drilling; fixing a temperature sensor on the seamless steel pipe, and leading out a temperature measuring line from inside to outside in the seamless steel pipe; two plugging and one-injecting hole packer are installed on the seamless steel pipe and are arranged in the drill hole along the same to plug the drill hole, wherein the length of a plugging section is 6m, the rest 7m are perforated pipes, and one end of each perforated pipe is plugged. The temperature detection at the temperature measuring point adopts an AD590JH integrated temperature sensor system, the temperature sensors are arranged at the positions 8m, 10m and 12m away from the roadway, and the sensors are arranged at the flower eye openings of the seamless steel pipe and are fixed well. The temperature measuring lead is arranged in the seamless steel pipe, and is externally connected with a temperature measuring instrument for detecting the temperature, and the specific arrangement is shown in figure 3.
In an exemplary embodiment, a value corresponding to a prediction index in an extraction borehole can be monitored in real time by arranging gas detection sensors around the extraction borehole. The prediction index may include, for example, at least one of the following: CO concentration of carbon monoxide, ethylene C 2 H 4 Concentration, propylene C 3 H 6 Concentration, acetylene C 2 H 2 Concentration, alkylene ratio, e.g. C 2 H 4 /C 2 H 6 The ratio of (a) to (b).
And step 102, determining the spontaneous combustion ignition position of the extraction drill hole according to the temperature.
In an exemplary embodiment, whether the temperature at each temperature measuring point in the bundle pipe is greater than a preset temperature threshold value or not can be judged, and the position where the temperature measuring point corresponding to the temperature greater than the preset temperature threshold value is located is determined as the position where the extraction borehole spontaneously ignites.
Wherein, predetermine the temperature threshold value, can set up as required, for example, can set up the ignition point temperature into the coal seam, or set up to certain temperature value that is higher than the normal temperature of coal seam etc. this disclosure does not do the restriction to this.
And 103, determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the numerical value corresponding to the prediction index.
It is understood that coal auto-ignition generally proceeds through three stages: the method comprises the steps of slow oxidation, accelerated oxidation and violent oxidation, and in the embodiment of the disclosure, the severity of spontaneous combustion and ignition of the extraction drill hole can be understood as a stage where coal is spontaneously combusted.
In an exemplary embodiment, because the coal temperatures of the coal beds are different when the spontaneous combustion stages of the coal bodies are different, and the numerical values corresponding to the prediction indexes are also different, for example, some gases appear at different stages of the spontaneous combustion of the coal bodies, and concentration values of some gases are different at different stages of the spontaneous combustion of the coal bodies, the coal temperature of the coal beds can be determined according to the numerical values corresponding to the prediction indexes, and the severity of the extraction borehole spontaneous combustion ignition is determined according to the coal temperature of the coal beds.
In an exemplary embodiment, the coal temperature of the coal seam is determined according to the value corresponding to the prediction index, and the following method may be adopted:
determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index and the corresponding relation between the numerical value corresponding to the prediction index and the coal temperature;
or when the value corresponding to the prediction index exceeds a preset value, determining that the coal temperature of the coal bed reaches the preset temperature.
The preset value can be 0 or a value close to 0, and the preset temperature is the coal temperature of the corresponding coal bed when the value of the prediction index exceeds the preset value.
The process of determining the severity of spontaneous ignition of the extraction drill hole according to the numerical value corresponding to the prediction index is explained below by combining the generation rules of various gases in the coal oxidation process.
Referring to table 1, the results of the gas products during the temperature rise of the coal oxidation are shown in table 1 when the oxygen concentration is 20.9%.
TABLE 1 gas product from coal thermal oxidation process with oxygen concentration of 20.9%
Wherein, O in Table 1 2 、N 2 The concentration unit is%, and the other gas unit is 10 -6 。
As can be seen from Table 1, as the temperature of the coal is increased, the gas generation amount generated by each oxidation process in the temperature-rising oxidation process of the coal is increased gradually, and the methane CH is generated before the temperature is increased to 259 DEG C 4 The released amount of (A) is not large, the maximum is about 280ppm (parts per million, concentration unit), the content begins to increase greatly after 368 ℃, and the content is 1875ppm when the temperature is about 368 ℃. Ethane C 2 H 6 The temperature at the time of appearance was about 73 ℃. At this time, carbon dioxide CO 2 The oxidation release amount is kept about 521 ppm. The general rule of the gas released by the spontaneous combustion oxidation of the coal body is that the amount of each oxidation product gas gradually increases with the rise of the coal temperature, but the generation rules expressed by different oxidation gases have larger difference in the generation amount and the generation sequence.
The relationship between the carbon monoxide CO concentration and the coal temperature in the coal body temperature-rise oxidation process is shown in fig. 4. As can be seen from fig. 4, CO is the earliest gas product in the oxidation process of coal and is produced throughout the oxidation process of coal, and the critical temperature for CO production is about 49 ℃; in the process that the temperature of the coal body slowly rises to 230 ℃, the concentration of the CO gas and the temperature of the coal approximately show a single increasing change trend, and the fitting relation of the concentration of the CO gas and the temperature of the coal is that y is 0.6e 0.033x . When the coal temperature is above 259 ℃, this exponential relationship will not exist, but rather exhibits another, more rapid growth relationship.
The relationship between the olefin gas and the coal temperature in the coal body temperature-rising oxidation process is shown in fig. 5. As shown in fig. 5, spontaneous combustion of coal is producedThe raw gas contains ethylene C 2 H 4 And propylene C 3 H 6 And the generation amount of the isoolefin gas gradually increases along with the increase of the coal temperature. C 2 H 4 Critical temperature for gas to appear is about 169 ℃, C 2 H 4 After the gas appears, the coal temperature rapidly reaches 368 ℃ from 259 ℃, the coal body enters an accelerated oxidation stage, and the curve of the coal body rapidly rises and shows a convex steep peak from the change of the gas concentration, which is the sign of the violent combustion of the coal body. C 3 H 6 Critical temperature for gas to appear is about 203 ℃, C 3 H 6 After the gas is generated, the coal enters a violent oxidation stage, then the temperature of the coal is rapidly raised to reach a burning point, and the temperature of the coal reaches a peak value in a short time.
Ratio of olefine to alkane in spontaneous combustion process of coal body C 2 H 4 /C 2 H 6 The relationship between the ratio and the coal temperature is shown in fig. 6. As can be seen in FIG. 6, C 2 H 4 /C 2 H 6 The ratio is in ascending change rule, and C is at 169 DEG C 2 H 4 Gas will start to appear and therefore only C will appear 2 H 4 The prediction index can be used for predicting the spontaneous combustion state of the coal body, and if the index is used, C needs to be considered 2 H 4 Auto-ignition conditions prior to the critical temperature.
In practical application, a proper prediction index can be selected according to actual conditions to monitor spontaneous combustion of coal body induced by coal bed gas extraction. Aiming at the different gases in the three stages of the spontaneous combustion of the coal body and the different ratios of the different gases, in order to improve the monitoring accuracy of the spontaneous combustion of the coal body, the concentration of a single gas can not be used as a prediction index, and C can be combined with C 2 H 4 、C 3 H 6 The concentrations of the representative olefin gas and the representative alkane gas are jointly used as comprehensive prediction indexes, so that the stage of the spontaneous combustion of the coal body is accurately determined, and effective prevention measures are taken for treatment.
Specifically, CO and C may be added 2 H 4 、C 3 H 6 、C 2 H 2 In a concentration of (B), and an alkylene ratio C 2 H 4 /C 2 H 6 As a prediction index. The temperature range of the CO prediction is before 230 ℃, and before 230 ℃, the coal temperature of the coal bed can be determined according to the CO concentration and the corresponding relation between the CO concentration and the coal temperature. C 2 H 4 The predicted initial temperature is 169 ℃ at C 2 H 4 Occur, i.e. C 2 H 4 When the concentration of (b) is more than 0, determining that the coal temperature of the coal bed reaches 169 ℃, and then regarding that the coal oxidation enters an accelerated oxidation stage. C 3 H 6 The predicted initial temperature was 203 ℃ at C 3 H 6 Occur, i.e. C 3 H 6 When the concentration of the carbon dioxide is more than 0, the coal temperature of the coal bed is determined to reach 203 ℃, and the coal is considered to be oxidized and enters a violent oxidation stage. C 2 H 2 The predicted initial temperature is 368 deg.C, at C 2 H 2 Occur, i.e. C 2 H 2 When the concentration of (b) is more than 0, the coal temperature of the coal bed is determined to reach 368 ℃, and the coal body is considered to be completely combusted. In addition, the alkylene ratio C 2 H 4 /C 2 H 6 Can be used to identify the natural combustion process of coal.
In summary, according to the monitoring method for inducing spontaneous combustion of coal body by coal bed gas extraction in the embodiment of the disclosure, by monitoring the temperature at each temperature measurement point in the coal bed gas extraction bundle, monitoring the value corresponding to the prediction index in the extraction drill hole in real time, determining the position of spontaneous combustion ignition of the extraction drill hole according to the temperature, and determining the severity of spontaneous combustion ignition of the extraction drill hole according to the value corresponding to the prediction index, real-time and accurate monitoring of spontaneous combustion of coal body induced by coal bed gas extraction is realized, and then prevention work can be performed in advance according to the monitoring result, so as to ensure the coal mine safety in the coal bed gas extraction process.
In order to realize the embodiment, the disclosure further provides a monitoring device for inducing spontaneous combustion of coal body by coal bed gas extraction.
Fig. 7 is a schematic block diagram view of a monitoring device for coal seam gas extraction induced spontaneous combustion of coal according to an embodiment of the disclosure.
As shown in fig. 7, a monitoring device 700 for inducing spontaneous combustion of coal body in coal seam gas extraction according to an embodiment of the present disclosure includes: a monitoring module 701, a first determining module 702, and a second determining module 703.
The monitoring module 701 is used for monitoring the temperature of each temperature measuring point in the coal bed gas extraction bundle and monitoring the value corresponding to the prediction index in the extraction drill hole in real time;
the first determining module 702 is used for determining the spontaneous combustion position of the extraction drill hole according to the temperature;
and the second determining module 703 is configured to determine the severity of spontaneous ignition of the extraction borehole according to the value corresponding to the prediction index.
The monitoring device 700 for inducing spontaneous combustion of coal body in coal bed gas extraction provided by the embodiment of the disclosure can execute the monitoring method for inducing spontaneous combustion of coal body in coal bed gas extraction in the foregoing embodiments, and the device can be an electronic device and can also be configured in the electronic device, so as to realize real-time and accurate monitoring of spontaneous combustion of coal body induced in coal bed gas extraction.
According to an embodiment of the present disclosure, the first determining module 702 includes:
the judging unit is used for judging whether the temperature of each temperature measuring point in the beam tube is greater than a preset temperature threshold value or not;
and the first determining unit is used for determining the position of the temperature measuring point with the corresponding temperature being greater than the preset temperature threshold value as the position of spontaneous combustion and ignition of the extraction drill hole.
According to an embodiment of the present disclosure, the second determining module 703 includes:
the second determining unit is used for determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index;
and the third determining unit is used for determining the severity of spontaneous combustion of the extraction drill hole according to the coal temperature of the coal bed.
According to an embodiment of the present disclosure, the second determining unit is specifically configured to:
determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index and the corresponding relation between the numerical value corresponding to the prediction index and the coal temperature;
or when the value corresponding to the prediction index exceeds a preset value, determining that the coal temperature of the coal bed reaches the preset temperature.
According to one embodiment of the present disclosure, the prediction index includes at least one of the following indexes: carbon monoxide concentration, ethylene concentration, propylene concentration, acetylene concentration, and alkylene ratio.
It should be noted that the explanation of the embodiment of the monitoring method for inducing spontaneous combustion of coal body in coal seam gas extraction is also applicable to the monitoring device for inducing spontaneous combustion of coal body in coal seam gas extraction in the embodiment, and details are not repeated here.
According to the monitoring device for inducing spontaneous combustion of coal body in coal bed gas extraction, the temperature of each temperature measuring point in the coal bed gas extraction bundle is monitored, the numerical value corresponding to the prediction index in the extraction drill hole is monitored in real time, the spontaneous combustion ignition position of the extraction drill hole is determined according to the temperature, the severity of the spontaneous combustion ignition of the extraction drill hole is determined according to the numerical value corresponding to the prediction index, real-time and accurate monitoring on the spontaneous combustion of the coal body induced by the coal bed gas extraction is achieved, prevention work can be performed in advance according to the monitoring result, and the coal mine safety in the coal bed gas extraction process is guaranteed.
In order to implement the above embodiments, the present disclosure also provides an electronic device, including: a processor; a memory for storing processor-executable instructions; the processor is configured to execute instructions to implement the monitoring method for inducing spontaneous combustion of coal body by coal bed gas extraction.
In order to achieve the above embodiments, the present disclosure also provides a non-transitory computer-readable storage medium storing computer instructions, where the computer instructions are configured to cause the computer to execute the method for monitoring spontaneous combustion of coal seam gas extraction induced coal according to the embodiment of the first aspect.
In order to implement the above embodiments, the present disclosure also provides a computer program product, which includes a computer program, and when the computer program is executed by a processor, the method for monitoring spontaneous combustion of coal body induced by coal seam gas extraction described in the embodiment of the first aspect is implemented.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present disclosure, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present disclosure in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present disclosure.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present disclosure may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present disclosure may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present disclosure have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and that changes, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present disclosure.
Claims (8)
1. A monitoring method for inducing spontaneous combustion of coal body by coal seam bedding gas extraction is characterized by comprising the following steps:
monitoring the temperature of each temperature measurement point in the coal bed gas extraction bundle, and monitoring the value corresponding to the prediction index in the extraction drill hole in real time, wherein the monitoring of the temperature of each temperature measurement point in the coal bed gas extraction bundle comprises the following steps: setting monitoring points in a preset range of a coal bed gas extraction drill hole, burying a seamless steel pipe in the drill hole at the monitoring points, and monitoring the temperature of each temperature measuring point in the coal bed gas extraction bundle by using a sensor and a temperature measuring lead which are arranged at each temperature measuring point in the seamless steel pipe;
determining the spontaneous combustion ignition position of the extraction drill hole according to the temperature;
determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the numerical value corresponding to the prediction index;
determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the numerical value corresponding to the prediction index, wherein the determining comprises the following steps:
determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index;
and determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the coal temperature of the coal bed.
2. The method of claim 1, wherein the determining the location of the spontaneous combustion ignition of the extraction borehole according to the temperature comprises:
judging whether the temperature of each temperature measuring point in the beam tube is greater than a preset temperature threshold value or not;
and determining the position of the temperature measuring point with the corresponding temperature larger than the preset temperature threshold value as the position of spontaneous combustion of the extraction drill hole.
3. The method of claim 1, wherein determining the coal temperature of the coal seam according to the value corresponding to the prediction index comprises:
determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index and the corresponding relation between the numerical value corresponding to the prediction index and the coal temperature;
or when the value corresponding to the prediction index exceeds a preset value, determining that the coal temperature of the coal bed reaches a preset temperature.
4. The method according to any one of claims 1-3, wherein the prediction index comprises at least one of the following indices: carbon monoxide concentration, ethylene concentration, propylene concentration, acetylene concentration, and alkylene ratio.
5. The utility model provides a monitoring devices that spontaneous combustion of coal body is induced in coal seam bedding gas drainage which characterized in that includes:
the monitoring module is used for monitoring the temperature of each temperature measuring point in the coal bed gas extraction beam pipe and monitoring the value corresponding to the prediction index in the extraction drill hole in real time, wherein the monitoring of the temperature of each temperature measuring point in the coal bed gas extraction beam pipe comprises the following steps: setting monitoring points in a preset range of a coal bed gas extraction drill hole, burying a seamless steel pipe in the drill hole at the monitoring points, and monitoring the temperature of each temperature measuring point in the coal bed gas extraction bundle by using a sensor and a temperature measuring lead which are arranged at each temperature measuring point in the seamless steel pipe;
the first determining module is used for determining the spontaneous combustion ignition position of the extraction drill hole according to the temperature;
the second determining module is used for determining the severity of spontaneous combustion of the extraction drill hole according to the numerical value corresponding to the prediction index;
wherein the second determining module comprises:
the second determining unit is used for determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index;
and the third determining unit is used for determining the severity of spontaneous combustion and ignition of the extraction drill hole according to the coal temperature of the coal bed.
6. The apparatus of claim 5, wherein the first determining module comprises:
the judging unit is used for judging whether the temperature of each temperature measuring point in the beam tube is greater than a preset temperature threshold value or not;
and the first determining unit is used for determining the position of the temperature measuring point with the corresponding temperature being greater than the preset temperature threshold value as the position of spontaneous combustion and ignition of the extraction drill hole.
7. The apparatus according to claim 5, wherein the second determining unit is specifically configured to:
determining the coal temperature of the coal bed according to the numerical value corresponding to the prediction index and the corresponding relation between the numerical value corresponding to the prediction index and the coal temperature;
or when the value corresponding to the prediction index exceeds a preset value, determining that the coal temperature of the coal bed reaches a preset temperature.
8. The apparatus according to any one of claims 5-7, wherein the prediction index comprises at least one of the following indices: carbon monoxide concentration, ethylene concentration, propylene concentration, acetylene concentration, and alkylene ratio.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110891829.5A CN113586153B (en) | 2021-08-04 | 2021-08-04 | Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110891829.5A CN113586153B (en) | 2021-08-04 | 2021-08-04 | Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113586153A CN113586153A (en) | 2021-11-02 |
| CN113586153B true CN113586153B (en) | 2022-09-16 |
Family
ID=78254985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110891829.5A Active CN113586153B (en) | 2021-08-04 | 2021-08-04 | Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113586153B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114215604B (en) * | 2021-12-21 | 2024-02-23 | 山西高河能源有限公司 | Underground test method for filling mining coal bed and filling body temperature |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927268A (en) * | 2016-04-21 | 2016-09-07 | 中国矿业大学 | Gas explosion coal seam permeability increasing extraction method in borehole in later period of induction extraction |
| CN107101743A (en) * | 2017-04-24 | 2017-08-29 | 安徽理工大学 | The monitoring system and method for comprehensive distributed prevention spontaneous combustion of coal gangue hill |
| CN110984962A (en) * | 2019-12-27 | 2020-04-10 | 中国矿业大学 | Fluidized gas extraction monitoring method |
| CN111608722A (en) * | 2020-06-03 | 2020-09-01 | 贵州盘江精煤股份有限公司 | Gas cooperative control method in pressure relief gas extraction process |
-
2021
- 2021-08-04 CN CN202110891829.5A patent/CN113586153B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105927268A (en) * | 2016-04-21 | 2016-09-07 | 中国矿业大学 | Gas explosion coal seam permeability increasing extraction method in borehole in later period of induction extraction |
| CN107101743A (en) * | 2017-04-24 | 2017-08-29 | 安徽理工大学 | The monitoring system and method for comprehensive distributed prevention spontaneous combustion of coal gangue hill |
| CN110984962A (en) * | 2019-12-27 | 2020-04-10 | 中国矿业大学 | Fluidized gas extraction monitoring method |
| CN111608722A (en) * | 2020-06-03 | 2020-09-01 | 贵州盘江精煤股份有限公司 | Gas cooperative control method in pressure relief gas extraction process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113586153A (en) | 2021-11-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN113586153B (en) | Method and device for monitoring spontaneous combustion of coal body induced by coal bed gas extraction | |
| US10753820B2 (en) | Integrity monitoring of conduits | |
| US4442895A (en) | Method of hydrofracture in underground formations | |
| US10274381B2 (en) | Pipeline constriction detection | |
| CN103234490B (en) | A kind of water seal underground oil storage cave depot water seal effect measure and control device | |
| KR101772914B1 (en) | Method for oil immersed transformer diagnosing | |
| CN105488730A (en) | Fire risk monitoring method of easy firing point at goaf | |
| CN110821473B (en) | Method for evaluating damage of shaft pipe column | |
| US20130292265A1 (en) | Impressed current cathodic protection | |
| EP1711681A1 (en) | Annulus plugging detection using a pressure transmitter in gas-lift oil production | |
| CN113605960B (en) | Method and device for preventing coal spontaneous combustion induced by coal bed gas extraction | |
| CN113586012A (en) | Method and device for determining bedding gas extraction drilling and sealing parameters | |
| CN110965994A (en) | Shaft leakage detection method | |
| CN113586145B (en) | Method and device for dividing coal spontaneous combustion dangerous area around gas extraction drill hole | |
| US20140160888A1 (en) | Acoustic sensing system for determining an interface between two materials | |
| CN112253051A (en) | Double-rod discharge device, equipment for controlled release of shallow harmful gas in land and construction method | |
| CN111927427A (en) | Oil gas well optical cable multi-parameter measuring device | |
| CN116337465A (en) | Gas turbine and backfire monitoring method, device and equipment thereof | |
| CN204175290U (en) | Tool for measuring temperature and pressure in well | |
| CN103592071A (en) | Voice frequency detection method for bearing pressure of coal wall | |
| RU1804566C (en) | Method for evaluation of outburst hazard of coal seam zones | |
| KR20210048676A (en) | Flare Tip Performance Tester | |
| CN117738726A (en) | Method for investigating effective radius of underground extraction of coal-bed gas | |
| CN116884185A (en) | Alarm control method, device and equipment with false detection prevention function and storage medium | |
| RU2303637C2 (en) | Probe for controlling the temperature profile in a blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 100013 No. 5 Youth ditch East Road, Hepingli, Beijing, Chaoyang District Applicant after: General Coal Research Institute Co.,Ltd. Address before: 100013 No. 5 Youth ditch East Road, Hepingli, Beijing, Chaoyang District Applicant before: CHINA COAL Research Institute |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |