CN111578147A - Automatic fault diagnosis method for coal mine underground coal seam gas extraction pipeline - Google Patents
Automatic fault diagnosis method for coal mine underground coal seam gas extraction pipeline Download PDFInfo
- Publication number
- CN111578147A CN111578147A CN202010288363.5A CN202010288363A CN111578147A CN 111578147 A CN111578147 A CN 111578147A CN 202010288363 A CN202010288363 A CN 202010288363A CN 111578147 A CN111578147 A CN 111578147A
- Authority
- CN
- China
- Prior art keywords
- pipeline
- extraction
- measuring point
- point
- gas
- 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.)
- Granted
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/005—Protection or supervision of installations of gas pipelines, e.g. alarm
Abstract
The invention discloses an automatic fault diagnosis method for a coal mine underground coal seam gas extraction pipeline, which comprises the following steps: step 1, collecting extraction negative pressure and mixed flow values of all measuring points of an extraction pipeline, numbering the measuring points from near to far from an extraction pump station, and recording the extraction negative pressure and the mixed flow values of the ith measuring point as Pi、Qi(ii) a Step 2, analyzing whether a fault exists between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a deviation index method, judging the type of the fault, if the type of the fault is pipeline leakage, executing the step 3, otherwise, directly executing the step 4; step 3, judging the position of a gas leakage point between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a pipeline gas leakage point positioning method; and 4, replacing i with i +1, returning to the step 2 to judge the fault type of the next position until i is the last measuring point number. The method can effectively solve the problem of low manual detection efficiency of the faults of the underground coal mine extraction pipeline, and provides technical support for the construction of the intelligent management and control platform of the extraction pipe network.
Description
Technical Field
The invention relates to an automatic diagnosis method for pipeline faults, in particular to an automatic diagnosis method for coal bed gas extraction pipeline faults in an underground coal mine.
Background
With the extension of coal resource exploitation to deep parts in China, the content of coal bed gas is gradually increased, and in consideration of safe coal exploitation and effective resource utilization, coal bed gas exploitation in coal mine areas becomes a strategic problem which needs to be solved urgently in China. Underground coal bed gas development at home and abroad is carried out by means of an extraction system, and due to the problems of corrosion perforation, fatigue fracture, external force damage and the like, the extraction pipeline is broken, so that the extraction efficiency is influenced, and the production safety is threatened. At present, the fault detection of the gas extraction pipeline mostly adopts an artificial mode, an effective system and an effective method are not applied, the expansion of the mining range of a mine causes the connection length of the extraction pipeline to be continuously increased, the efficiency of the artificial detection mode is further enlarged, and the development of an automatic fault diagnosis method for the coal bed gas extraction pipeline applicable to the underground coal mine is urgently needed.
Researchers have proposed that real-time data of a coal mine gas extraction monitoring system is utilized to analyze extraction pipeline fault information, for example, the chinese patent invention with publication number CN102174899A discloses a "coal bed gas safe gathering and transportation intelligent regulation and control system" in a coal mine area, which proposes a method for analyzing and judging whether a coal bed gas gathering and transportation pipe network is abnormal according to extraction monitoring data; the invention discloses a Chinese patent with publication number CN105627103A, and discloses a method and a system for diagnosing gas leakage of a pipe section of a mine gas extraction pipe, which provides a method for judging whether a gas extraction pipeline leaks gas or not by using the relation between the current value of the measured point mixed flow and the standard value of the mixed flow, and provides a gas leakage range; the invention discloses a Chinese patent publication No. CN105757459A, and discloses a gas extraction pipe network parameter monitoring system and a leakage point accurate positioning method, and provides a method for accurately positioning leakage points of an extraction pipeline by adopting a one-dimensional cellular automaton model. The method for judging the extraction pipeline fault is a beneficial attempt in the prior art, but the comprehensiveness and accuracy of the fault diagnosis of the extraction pipeline need to be further researched.
Disclosure of Invention
Based on the technical problems, the invention provides an automatic fault diagnosis method for a coal mine underground coal seam gas extraction pipeline, which can realize accurate judgment of a fault mode of the extraction pipeline and quick positioning of a gas leakage point when leakage occurs based on underground gas extraction monitoring data, and can realize quick and accurate diagnosis of the fault of the extraction pipeline.
The technical solution adopted by the invention is as follows:
a method for automatically diagnosing faults of a coal mine underground coal seam gas extraction pipeline comprises the following steps:
step (ii) of1, collecting extraction negative pressure and mixed flow value of each measuring point of an extraction pipeline, numbering the measuring points from near to far from an extraction pump station, and recording the extraction negative pressure and the mixed flow value of the ith measuring point as Pi、Qi；
Step 2, analyzing whether a fault exists between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a deviation index method, judging the type of the fault, if the type of the fault is pipeline leakage, executing the step 3, otherwise, directly executing the step 4;
step 3, judging the position of a gas leakage point between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a pipeline gas leakage point positioning method;
step 4, replacing i with i +1, returning to the step 2 to judge the fault type of the next position until i is the last measuring point number;
in step 2, the deviation index method comprises the following processes:
a. the negative pressure deviation index delta P and the mixed flow deviation index delta Q are calculated by the following formulas
ΔP＝||Pa-Pi+1|-H|
ΔQ＝|Qi-Qi+1|
In the formula, H is the resistance of an extraction pipeline, Pa; k is a radical of1Is the local resistance coefficient; delta is the equivalent absolute roughness of the inner wall of the pipeline; d is the inner diameter of the circular pipeline, and for the non-circular pipeline, the equivalent diameter is cm; upsilon is the kinematic viscosity of the gas in the pipeline, m2/s；QiGas flow, m, monitored for the ith measurement point3/h；XiThe length m of the pipeline between the ith measuring point and the extraction pump is; xi+1The length m of the pipeline between the (i + 1) th measuring point and the extraction pump is; rho is the density of gas in the pipeline, kg/m3(ii) a g is the acceleration of gravity, m/s2；hi、hi+1Respectively the horizontal elevation m of the ith measuring point and the (i + 1) th measuring point;
b. analyzing the fault type, and setting the extraction negative pressure deviation threshold value as1Mixed flow deviationThe threshold value is2If Δ P is not less than1And Δ Q is not less than2If the fault type is diagnosed as pipeline leakage; if Δ P is not less than1And Δ Q <2If the fault type is diagnosed as pipeline blockage; if the other condition is the case, the diagnosis is no fault.
In step 3, the pipeline air leakage point positioning method adopts a pipeline air leakage point positioning method based on a transient model and/or a pipeline air leakage point positioning method based on a steady-state model.
The calculation process of the pipeline air leakage point positioning method based on the transient model is as follows:
a. collecting extraction negative pressure values of the ith measuring point and the (i + 1) th measuring point at different times;
b. drawing and analyzing time-course curves of the pumping negative pressure of the ith measuring point and the (i + 1) th measuring point to find out the mutation point of the negative pressure, wherein the time of the mutation point of the ith measuring point and the time of the mutation point of the (i + 1) th measuring point are respectively ti、ti+1；
c. Calculating the pipeline length X of the gas leakage point from the extraction pump by adopting the following calculation formula
Wherein a is the propagation speed of the pressure wave in the pipeline, m/s; v is the flow velocity of the gas in the pipe, m/s.
The calculation process of the pipeline air leakage point positioning method based on the steady-state model is as follows:
a. collecting extraction negative pressure values of an ith measuring point and an (i + 1) th measuring point at a certain moment;
b. according to the extraction parameters of the ith measuring point and the extraction parameters of the (i + 1) th measuring point, calculating the pipeline length X of the gas leakage point from the extraction pump by adopting the following equation
Hi+Hi+1+HL＝Pi-Pi+1
Wherein ξ is the local resistance coefficient of the air leakage point hXIs the horizontal elevation, m, of the point of air leakage.
The beneficial technical effects of the invention are as follows:
the invention provides an automatic fault diagnosis method for a coal mine underground coal seam gas extraction pipeline, which can realize accurate judgment of a fault mode of the extraction pipeline and quick positioning of a gas leakage point when leakage occurs based on underground gas extraction monitoring data, and realize quick and accurate fault diagnosis of the extraction pipeline.
The method can effectively solve the problem of low manual detection efficiency of the faults of the underground extraction pipeline of the coal mine, can provide technical support for the construction of the intelligent management and control platform of the extraction pipe network, has great significance for the construction of the intelligent management and control platform of the extraction pipe network of high-gas and outburst mines, especially has great popularization prospect for old mines with complicated extraction pipe networks and long pipelines, and can generate economic benefits in the safety production of the coal mine.
Drawings
The invention will be further described with reference to the following figures and specific examples:
FIG. 1 is a flow chart of the automatic fault diagnosis of a coal mine underground coal bed gas extraction pipeline of the invention;
FIG. 2 is a schematic diagram of a pipeline leakage point positioning method based on a transient model according to the present invention;
FIG. 3 is a schematic diagram of a steady-state model-based method for positioning a leakage point of a pipeline according to the present invention.
Detailed Description
Example 1
As shown in FIG. 1, the method for automatically diagnosing the fault of the coal mine underground coal bed gas extraction pipeline comprises the following steps:
Step 2, analyzing whether a fault exists between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a deviation index method, judging the type of the fault, if the type of the fault is pipeline leakage, executing the step 3, otherwise, directly executing the step 4;
step 3, judging the position of a gas leakage point between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a pipeline gas leakage point positioning method;
and 4, replacing i with i +1, returning to the step 2 to judge the fault type of the next position until i is the last measuring point number.
The deviation index method of the step 2 comprises the following processes:
a. the negative pressure deviation index delta P and the mixed flow deviation index delta Q are calculated by the following formulas
ΔP＝||Pi-Pi+1|-H|
ΔQ＝|Qi-Qi+1|
In the formula, H is the resistance of an extraction pipeline, Pa; k is a radical of1Is the local resistance coefficient; delta is the equivalent absolute roughness of the inner wall of the pipeline; d is the inner diameter of the circular pipeline, and for the non-circular pipeline, the equivalent diameter is cm; upsilon is the kinematic viscosity of the gas in the pipeline, m2/s；QiGas flow, m, monitored for the ith measurement point3/h；XiThe length m of the pipeline between the ith measuring point and the extraction pump is; xi+1The length m of the pipeline between the (i + 1) th measuring point and the extraction pump is; rho is the density of gas in the pipeline, kg/m3(ii) a g is the acceleration of gravity, m/s2；hi、hi+1The horizontal elevation m of the ith measuring point and the (i + 1) th measuring point are respectively.
b. Analyzing the fault type, and setting the extraction negative pressure deviation threshold value as1A mixed flow deviation threshold value of2If Δ P is not less than1And Δ Q is not less than2If the fault type is diagnosed as pipeline leakage; if Δ P is not less than1And Δ Q <2If the fault type is diagnosed as pipeline blockage; if the other condition is the case, the diagnosis is no fault.
As shown in fig. 2, the pipeline air leakage point positioning method in step 3 adopts a pipeline air leakage point positioning method based on a transient model, and the calculation process of the pipeline air leakage point positioning method based on the transient model is as follows:
a. collecting extraction negative pressure values of the ith measuring point and the (i + 1) th measuring point at different times;
b. drawing according to the values acquired in the step a, and drawing an extraction negative pressure time course curve of the ith measuring point and the (i + 1) th measuring point, namely a change curve of extraction negative pressure along with time, wherein the abscissa is time, and the ordinate is extraction negative pressure; and finding out the mutation point of the negative pressure by analyzing the time course curves of the extraction negative pressure of the ith measuring point and the (i + 1) th measuring point, wherein the time of the mutation point of the ith measuring point and the time of the mutation point of the (i + 1) th measuring point are respectively ti、ti+1；
c. Calculating the pipeline length X of the gas leakage point from the extraction pump by adopting the following calculation formula
Wherein a is the propagation speed of the pressure wave in the pipeline, m/s; v is the flow velocity of the gas in the pipe, m/s.
Example 2
As shown in fig. 1, is substantially the same as in embodiment 1. The different parts are mainly that the pipeline air leakage point positioning method in step 3 in the embodiment 1 adopts a pipeline air leakage point positioning method based on a steady-state model.
As shown in fig. 3, the pipe leakage point positioning method in step 3 adopts a pipe leakage point positioning method based on a steady-state model, and the calculation process of the pipe leakage point positioning method based on the steady-state model is as follows:
a. collecting extraction negative pressure values of an ith measuring point and an (i + 1) th measuring point at a certain moment;
b. according to the extraction parameters of the ith measuring point and the extraction parameters of the (i + 1) th measuring point, calculating the pipeline length X of the gas leakage point from the extraction pump by adopting the following equation
Hi+Hi+1+HL＝Pi-Pi+1
Wherein ξ is the local resistance coefficient of the air leakage point hXIs the horizontal elevation, m, of the point of air leakage.
The rest of the process was the same as example 1, and the same portions were omitted.
The pipeline gas leakage point positioning method based on the steady-state model is used for carrying out field tests on a coal mine, gas leakage points are manually arranged at set positions of extraction pipes, monitoring points of extraction negative pressure, flow and other parameters are arranged on two sides of the gas leakage points, calculation is carried out by adopting the pipeline gas leakage point positioning method based on the steady-state model, and experimental results show that the relative error is 6%, and the method can adapt to the precision requirements of engineering sites.
Example 3
As shown in fig. 1, is substantially the same as in embodiment 1. The different parts are mainly the positioning method of the pipeline air leakage point in step 3 in the embodiment 1, which adopts a positioning method of the pipeline air leakage point based on the combination of a transient model and a steady-state model.
As shown in fig. 2, the calculation process of the pipeline leakage point positioning method based on the transient model is as follows:
a. collecting extraction negative pressure values of the ith measuring point and the (i + 1) th measuring point at different times;
b. drawing and analyzing time-course curves of the pumping negative pressure of the ith measuring point and the (i + 1) th measuring point to find out the mutation point of the negative pressure, wherein the time of the mutation point of the ith measuring point and the time of the mutation point of the (i + 1) th measuring point are respectively ti、ti+1；
c. Calculating the position X of the leakage point by adopting the following calculation formulas
As shown in fig. 3, the calculation process of the pipeline leakage point positioning method based on the steady-state model is as follows:
a. collecting extraction negative pressure values of an ith measuring point and an (i + 1) th measuring point at a certain moment;
b. according to the extraction parameters of the ith measuring point and the extraction parameters of the (i + 1) th measuring point, calculating the pipeline length X of the gas leakage point from the extraction pump by adopting the following equationw
Hi+Hi+1+HL＝Pi-Pi+1
Judging the length of a gas leakage point between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline from the pipeline of the extraction pump to be Xs～Xw。
The rest of the process was the same as example 1, and the same portions were omitted.
Claims (4)
1. A method for automatically diagnosing faults of a coal mine underground coal seam gas extraction pipeline is characterized by comprising the following steps:
step 1, collecting extraction negative pressure and mixed flow values of all measuring points of an extraction pipeline, numbering the measuring points from near to far from an extraction pump station, and recording the extraction negative pressure and the mixed flow values of the ith measuring point as Pi、Qi；
Step 2, analyzing whether a fault exists between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a deviation index method, judging the type of the fault, if the type of the fault is pipeline leakage, executing the step 3, otherwise, directly executing the step 4;
step 3, judging the position of a gas leakage point between the ith measuring point and the (i + 1) th measuring point of the extraction pipeline by adopting a pipeline gas leakage point positioning method;
step 4, replacing i with i +1, returning to the step 2 to judge the fault type of the next position until i is the last measuring point number;
in step 2, the deviation index method comprises the following processes:
a. the negative pressure deviation index delta P and the mixed flow deviation index delta Q are calculated by the following formulas
ΔP＝||Pi-Pi+1|-H|
ΔQ＝|Qi-Qi+1|
In the formula, H is the resistance of an extraction pipeline, Pa; k is a radical of1Is the local resistance coefficient; delta is the equivalent absolute roughness of the inner wall of the pipeline; d is the inner diameter of the circular pipeline, and for the non-circular pipeline, the equivalent diameter is cm; upsilon is the kinematic viscosity of the gas in the pipeline, m2/s；QiGas flow, m, monitored for the ith measurement point3/h；XiThe length m of the pipeline between the ith measuring point and the extraction pump is; xi+1The length m of the pipeline between the (i + 1) th measuring point and the extraction pump is; rho is the density of gas in the pipeline, kg/m3(ii) a g is the acceleration of gravity, m/s2；hi、hi+1Respectively the horizontal elevation m of the ith measuring point and the (i + 1) th measuring point;
b. analyzing the fault type, and setting the extraction negative pressure deviation threshold value as1A mixed flow deviation threshold value of2If Δ P is not less than1And Δ Q is not less than2If the fault type is diagnosed as pipeline leakage; if Δ P is not less than1And Δ Q <2If the fault type is diagnosed as pipeline blockage; if the other condition is the case, the diagnosis is no fault.
2. The method for automatically diagnosing the faults of the gas extraction pipelines of the coal mine underground coal seam according to claim 1, wherein in the step 3, the pipeline gas leakage point positioning method adopts a pipeline gas leakage point positioning method based on a transient model and/or a pipeline gas leakage point positioning method based on a steady-state model.
3. The method for automatically diagnosing the faults of the gas extraction pipelines of the coal mine underground coal seam according to claim 2, wherein the calculation process of the pipeline gas leakage point positioning method based on the transient model is as follows:
a. collecting extraction negative pressure values of the ith measuring point and the (i + 1) th measuring point at different times;
b. drawing and analyzing time-course curves of the pumping negative pressure of the ith measuring point and the (i + 1) th measuring point to find out the mutation point of the negative pressure, wherein the time of the mutation point of the ith measuring point and the time of the mutation point of the (i + 1) th measuring point are respectively ti、ti+1；
c. Calculating the pipeline length X of the gas leakage point from the extraction pump by adopting the following calculation formula
Wherein a is the propagation speed of the pressure wave in the pipeline, m/s; v is the flow velocity of the gas in the pipe, m/s.
4. The method for automatically diagnosing the fault of the coal mine underground coal seam gas extraction pipeline according to claim 2, wherein the calculation process of the pipeline gas leakage point positioning method based on the steady-state model is as follows:
a. collecting extraction negative pressure values of an ith measuring point and an (i + 1) th measuring point at a certain moment;
b. according to the extraction parameters of the ith measuring point and the extraction parameters of the (i + 1) th measuring point, calculating the pipeline length X of the gas leakage point from the extraction pump by adopting the following equation
Hi+Hi+1+HL＝Pi-Pi+1
Wherein ξ is the local resistance coefficient of the air leakage point hXIs the horizontal elevation, m, of the point of air leakage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010288363.5A CN111578147B (en) | 2020-04-14 | 2020-04-14 | Automatic fault diagnosis method for coal mine underground coal seam gas extraction pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010288363.5A CN111578147B (en) | 2020-04-14 | 2020-04-14 | Automatic fault diagnosis method for coal mine underground coal seam gas extraction pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111578147A true CN111578147A (en) | 2020-08-25 |
| CN111578147B CN111578147B (en) | 2022-01-25 |
Family
ID=72122537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010288363.5A Active CN111578147B (en) | 2020-04-14 | 2020-04-14 | Automatic fault diagnosis method for coal mine underground coal seam gas extraction pipeline |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111578147B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081619A (en) * | 2020-09-10 | 2020-12-15 | 煤炭科学技术研究院有限公司 | Coal mine underground coal seam gas extraction regulation and control system and regulation and control method |
| CN113589857A (en) * | 2021-09-30 | 2021-11-02 | 广州能源检测研究院 | Gas negative pressure power regulating system with fault diagnosis function and diagnosis method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182932A (en) * | 2011-02-28 | 2011-09-14 | 煤炭科学研究总院重庆研究院 | Method for detecting fault of coal bed methane collecting and delivering pipeline at coal mine region |
| CN103148353A (en) * | 2013-03-21 | 2013-06-12 | 中煤科工集团武汉设计研究院 | Long-distance pipeline coal conveying leakage detecting control system |
| CN104453981A (en) * | 2014-10-29 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Coal mine mining area coal-bed gas well parameter monitoring system and method |
| CN105135216A (en) * | 2015-07-30 | 2015-12-09 | 云南大红山管道有限公司 | Method for locating leakage position of ore pulp conveying pipe |
| US9759589B2 (en) * | 2011-06-27 | 2017-09-12 | International Business Machines Corporation | Determining fluid leakage volume in pipelines |
| CN110513603A (en) * | 2019-08-13 | 2019-11-29 | 常州大学 | A kind of nonmetal pipeline leakage locating method based on inverse Transient Analysis |
-
2020
- 2020-04-14 CN CN202010288363.5A patent/CN111578147B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102182932A (en) * | 2011-02-28 | 2011-09-14 | 煤炭科学研究总院重庆研究院 | Method for detecting fault of coal bed methane collecting and delivering pipeline at coal mine region |
| US9759589B2 (en) * | 2011-06-27 | 2017-09-12 | International Business Machines Corporation | Determining fluid leakage volume in pipelines |
| CN103148353A (en) * | 2013-03-21 | 2013-06-12 | 中煤科工集团武汉设计研究院 | Long-distance pipeline coal conveying leakage detecting control system |
| CN104453981A (en) * | 2014-10-29 | 2015-03-25 | 中煤科工集团西安研究院有限公司 | Coal mine mining area coal-bed gas well parameter monitoring system and method |
| CN105135216A (en) * | 2015-07-30 | 2015-12-09 | 云南大红山管道有限公司 | Method for locating leakage position of ore pulp conveying pipe |
| CN110513603A (en) * | 2019-08-13 | 2019-11-29 | 常州大学 | A kind of nonmetal pipeline leakage locating method based on inverse Transient Analysis |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081619A (en) * | 2020-09-10 | 2020-12-15 | 煤炭科学技术研究院有限公司 | Coal mine underground coal seam gas extraction regulation and control system and regulation and control method |
| CN112081619B (en) * | 2020-09-10 | 2022-06-07 | 煤炭科学技术研究院有限公司 | Coal mine underground coal seam gas extraction regulation and control system and regulation and control method |
| CN113589857A (en) * | 2021-09-30 | 2021-11-02 | 广州能源检测研究院 | Gas negative pressure power regulating system with fault diagnosis function and diagnosis method |
| CN113589857B (en) * | 2021-09-30 | 2021-12-31 | 广州能源检测研究院 | Gas negative pressure power regulating system with fault diagnosis function and diagnosis method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111578147B (en) | 2022-01-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111578147B (en) | Automatic fault diagnosis method for coal mine underground coal seam gas extraction pipeline | |
| CN108360608B (en) | Pipe burst identification and positioning method for water delivery pipe of water supply system | |
| CN104180166B (en) | A kind of pipeline leakage detection method based on pipeline pressure data | |
| AU2019440174A1 (en) | Inversion calculation method of fast test while drilling of coal-bed gas parameters | |
| CN108922123B (en) | mine slope slip stability monitoring and early warning method | |
| CN109340582A (en) | A kind of submarine pipeline leakage monitoring method and system | |
| CN106813109A (en) | A kind of fluid leakage on-line monitoring and alignment system and method | |
| CN102182932A (en) | Method for detecting fault of coal bed methane collecting and delivering pipeline at coal mine region | |
| CN113266420B (en) | Method for monitoring stability of cavity of salt cavern gas storage | |
| CN108506740B (en) | Method and system for determining leakage area of liquid pipeline based on flow velocity meter | |
| CN113343498A (en) | Containing H2S/CO2Method for calculating corrosion rate of environmental pipeline steel | |
| CN109798151A (en) | A kind of method of intellectual monitoring methane gas extraction pipeline operation conditions | |
| CN103852119A (en) | Continuous wind tunnel compressor inlet flow measurement method | |
| CN113864658A (en) | Detection system and method for gas pipeline leakage fault | |
| CN116541678B (en) | Pressure monitoring method and device for gas station safety pipeline | |
| CN113446521B (en) | Tube burst positioning method based on transient flow | |
| CN105387834A (en) | Closing pipe-based distance measurement equipment and measuring method | |
| CN113673180B (en) | Method for quickly calculating leakage position of paste filling long-distance horizontal conveying pipeline | |
| CN112836350A (en) | Real-time resolving method for gas extraction parameters of coal mine down-pipe network | |
| CN113112024B (en) | Prediction and control method and system for random multi-crack random expansion | |
| CN112197913A (en) | Sliding type pipeline leakage point detection positioning device and detection positioning method thereof | |
| CN212508211U (en) | Coal bed gas well compound production increasing wellhead and platform system | |
| CN210033411U (en) | Real-time online monitoring system for TBM anchor rod drilling machine based on hydraulic system | |
| CN113550736A (en) | Anomaly analysis system and method applied to oil gas collection | |
| CN112347414A (en) | Single-defect bent pipe limit internal pressure calculation method |
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 | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Huijie Inventor after: Wang Dong Inventor after: Fan Xisheng Inventor after: Zhang Zhirong Inventor after: Wang Weihua Inventor after: Pan Tiezhu Inventor after: Guo Jianxing Inventor after: Zhu Nannan Inventor after: Huo Zhonggang Inventor after: Shu Longyong Inventor after: Zhang Yibin Inventor after: Zhang Lang Inventor after: Li Wei Inventor after: An Sai Inventor after: Ye Jinjiao Inventor after: Liu Yongqian Inventor before: Zhang Huijie Inventor before: Wang Dong Inventor before: Fan Xisheng Inventor before: Zhang Zhirong Inventor before: Wang Weihua Inventor before: Pan Tiezhu Inventor before: Guo Jianxing Inventor before: Zhu Nannan Inventor before: Huo Zhonggang Inventor before: Shu Longyong Inventor before: Zhang Yibin Inventor before: Zhang Lang Inventor before: Li Wei Inventor before: An Sai Inventor before: Ye Jinjiao Inventor before: Liu Yongqian |
|
| CB03 | Change of inventor or designer information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |