CN112415137A - Method for measuring gas concentration field of goaf by utilizing goaf closed wall extraction data - Google Patents
Method for measuring gas concentration field of goaf by utilizing goaf closed wall extraction data Download PDFInfo
- Publication number
- CN112415137A CN112415137A CN202011182620.3A CN202011182620A CN112415137A CN 112415137 A CN112415137 A CN 112415137A CN 202011182620 A CN202011182620 A CN 202011182620A CN 112415137 A CN112415137 A CN 112415137A
- Authority
- CN
- China
- Prior art keywords
- concentration
- goaf
- gas
- extraction
- closed wall
- 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.)
- Pending
Links
- 238000000605 extraction Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000013459 approach Methods 0.000 claims abstract description 4
- 238000012163 sequencing technique Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000004458 analytical method Methods 0.000 abstract description 3
- 238000004364 calculation method Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion 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
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0062—General constructional details of gas analysers, e.g. portable test equipment concerning the measuring method or the display, e.g. intermittent measurement or digital display
-
- 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
- E21F7/00—Methods or devices for drawing- off gases with or without subsequent use of the gas for any purpose
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Information and communication technology [ICT] specially adapted for implementation of business processes of specific business sectors, e.g. utilities or tourism
- G06Q50/02—Agriculture; Fishing; Forestry; Mining
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Health & Medical Sciences (AREA)
- Business, Economics & Management (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- General Health & Medical Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Marine Sciences & Fisheries (AREA)
- Food Science & Technology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Combustion & Propulsion (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Geology (AREA)
- Animal Husbandry (AREA)
- Medicinal Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Economics (AREA)
- Human Resources & Organizations (AREA)
- Marketing (AREA)
- Primary Health Care (AREA)
- Strategic Management (AREA)
- Tourism & Hospitality (AREA)
- General Business, Economics & Management (AREA)
- Theoretical Computer Science (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a method for measuring a gas concentration field of a goaf by utilizing goaf closed wall extraction data, which comprises the following steps: s1, collecting the gas extraction concentration of a closed wall of a working face goaf; s2, collecting the gas concentration of the lower corner of the working face; s3, judging whether the gas extraction concentration of the ith closed wall is smaller than that of the (i-1) th closed wall, and if so, entering the step S4; if not, ending; and S4, judging whether the gas extraction concentration of the ith closed wall approaches to zero or not or whether the gas extraction concentration of the ith closed wall is smaller than the gas concentration of the lower corner of the working face or not, if so, determining a gas concentration field, and if not, ending. The method for measuring the gas concentration field of the goaf by using the closed-wall extraction data of the goaf can effectively measure the gas concentration field of the goaf, has accurate calculation and simple process, improves the analysis efficiency of gas disasters of the goaf, and ensures the safety production of a coal mine.
Description
Technical Field
The invention relates to the field of gas, in particular to a method for measuring a gas concentration field of a goaf by utilizing goaf closed wall extraction data.
Background
The gas control in the goaf is a difficult problem of gas control in a coal mine, and most of the goaf belongs to a compacted space, so that the gas in the goaf cannot be effectively monitored, and great gas hazards in the goaf, such as gas explosion in the goaf, re-mining gas hazards in the goaf and the like, are possibly caused.
In order to safely extract the gas in the goaf, a reliable support can be provided for the safe extraction of the gas in the goaf by a mode of measuring a gas concentration field in the goaf. At present, the existing method for the gas concentration field of the goaf has large deviation of a calculation result or complex operation process.
Disclosure of Invention
In view of the above, the invention aims to overcome the defects in the prior art, and provides a method for determining a gas concentration field of a goaf by using goaf closed-wall extraction data, which can effectively determine the gas concentration field of the goaf, is accurate in calculation and simple in process, improves the analysis efficiency of gas disasters of the goaf, and ensures the safe production of a coal mine.
The method for measuring the gas concentration field of the goaf by utilizing the goaf closed-wall extraction data comprises the following steps:
s1, collecting the gas extraction concentration of the closed wall of the working face goaf to obtain a gas extraction concentration sequence (X)1,X2,…,Xi,…,Xn) (ii) a Wherein, XiThe gas extraction concentration corresponding to the ith closed wall; n is the total number of the closed walls of the goaf on the working face; i is the reverse of the closed wall of the working face gob in the air return directionOrdinal numbers for direction ordering, i ═ 1,2, …, n;
s2, collecting the gas concentration x of the lower corner of the working face2；
S3, judging the gas extraction concentration X of the ith closed walliWhether the gas extraction concentration is less than the gas extraction concentration X of the (i-1) th closed walli-1If yes, go to step S4; if not, ending;
s4, judging the gas extraction concentration X of the ith closed walliWhether the gas extraction concentration X approaches zero or the ith closed walliWhether or not less than lower corner gas concentration x of the working face2If so, taking the intersection point of the symmetrical middle line of the ith closed wall and the (i-1) th closed wall and the upper edge of the working face as the first endpoint position, taking the position of the lower corner of the working face as the second endpoint position, and taking a curve l formed by connecting the first endpoint position and the second endpoint positioniThe concentration contour lines of the extraction affected area between the ith closure wall and the (i-1) th closure wall are taken as concentration contour lines, and different concentration contour lines are concentration fields of the gas in the goaf; if not, the process is ended.
Further, step S1 further includes: gas extraction concentration X corresponding to the ith closed walliThe concentration of the concentration contour line of the extraction influence position of the ith closed wall is taken as the concentration of the concentration contour line of the extraction influence position of the ith closed wall; and the concentration contour line of the extraction influence position of the ith closed wall is a connecting curve of the position of the ith closed wall and the position of the lower corner of the working face.
Further, step S2 further includes: collecting gas concentration x at upper corner of working face1And the gas concentration x at the upper corner is measured1The concentration of the concentration contour line of the extraction influence position as the upper corner; and the concentration contour line of the extraction influence position of the upper corner is a connecting curve of the position of the upper corner and the position of the lower corner of the working surface.
Further, in step S4, the concentration of the deviation position in the extraction influence region between the ith bulkhead and the (i-1) th bulkhead is determined by an interpolation method.
The invention has the beneficial effects that: according to the method for determining the gas concentration field of the goaf by using the closed-wall gas extraction data of the goaf, disclosed by the invention, the concentration of the gas in the goaf is determined by adopting a closed-wall gas extraction mode, so that the gas distribution of the goaf can be effectively analyzed, the gas concentration field of the goaf is calculated, the analysis efficiency of gas disasters of the goaf is improved, and the safe production of a coal mine is ensured.
Drawings
The invention is further described below with reference to the following figures and examples:
FIG. 1 is a schematic flow chart of the method of the present invention.
Detailed Description
The invention is further described with reference to the accompanying drawings, in which:
the method for measuring the gas concentration field of the goaf by utilizing the goaf closed-wall extraction data, disclosed by the invention, comprises the following steps as shown in figure 1:
s1, collecting the gas extraction concentration of the closed wall of the working face goaf to obtain a gas extraction concentration sequence (X)1,X2,…,Xi,…,Xn) (ii) a Wherein, XiThe gas extraction concentration corresponding to the ith closed wall; n is the total number of the closed walls of the goaf on the working face; i is a serial number for sequencing the closed walls of the working face goaf in the reverse direction of the return air direction, and i is 1,2, …, n; in this embodiment, the working surface includes an air intake lane and an air return lane; the gas in the goaf flows out to a return airway along a buried pipe arranged at the edge of the goaf under the action of wind power, and the closed wall is arranged at a gas outlet of the buried pipe;
s2, collecting the gas concentration x of the lower corner of the working face2(ii) a The lower corner of the working face is an included angle between the working face air inlet lane and the working face;
s3, judging the gas extraction concentration X of the ith closed walliWhether the gas extraction concentration is less than the gas extraction concentration X of the (i-1) th closed walli-1If yes, go to step S4; if not, ending;
s4, judging the gas extraction concentration X of the ith closed walliWhether the gas extraction concentration X approaches zero or the ith closed walliWhether or not less than lower corner gas concentration x of the working face2If yes, the ith closing wall is connected withThe intersection point of the symmetrical middle line of the (i-1) th closed wall and the upper edge of the working face is taken as a first endpoint position, the position of the lower corner of the working face is taken as a second endpoint position, and a curve l formed by connecting the first endpoint position and the second endpoint positioniThe concentration contour lines of the extraction affected area between the ith closure wall and the (i-1) th closure wall are taken as concentration contour lines, and different concentration contour lines are concentration fields of the gas in the goaf; if not, the process is ended.
It should be noted that the gas extraction concentration or the gas concentration can be measured by using an extraction measuring instrument, and the extraction measuring instrument adopts the prior art, and is not described herein again. The concentration contour line in the invention is a curve formed by connecting a plurality of points with the same or similar gas concentrations.
According to the requirements of coal mine safety production, the wind direction and the wind power in the working face goaf are generally stable, and the concentration contour line is generally a curve protruding outwards under the action of the wind power, namely, the connecting curve in the invention is a curve protruding outwards.
In this embodiment, step S1 further includes: gas extraction concentration X corresponding to the ith closed walliThe concentration of the concentration contour line of the extraction influence position of the ith closed wall is taken as the concentration of the concentration contour line of the extraction influence position of the ith closed wall; and the concentration contour line of the extraction influence position of the ith closed wall is a connecting curve of the position of the ith closed wall and the position of the lower corner of the working face.
In this embodiment, step S2 further includes: collecting gas concentration x at upper corner of working face1And the gas concentration x at the upper corner is measured1The concentration of the concentration contour line of the extraction influence position as the upper corner; and the concentration contour line of the extraction influence position of the upper corner is a connecting curve of the position of the upper corner and the position of the lower corner of the working surface. And the upper corner of the working face is an included angle between the working face air return roadway and the working face.
In this embodiment, in step S4, the concentration of the deviation position in the extraction influence region between the ith closed wall and the (i-1) th closed wall is determined by an interpolation method. The interpolation method adopts the prior art and is not described in detail herein.
Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.
Claims (4)
1. A method for measuring a gas concentration field of a goaf by utilizing goaf closed-wall extraction data is characterized by comprising the following steps: the method comprises the following steps:
s1, collecting the gas extraction concentration of the closed wall of the working face goaf to obtain a gas extraction concentration sequence (X)1,X2,…,Xi,…,Xn) (ii) a Wherein, XiThe gas extraction concentration corresponding to the ith closed wall; n is the total number of the closed walls of the goaf on the working face; i is a serial number for sequencing the closed walls of the working face goaf in the reverse direction of the return air direction, and i is 1,2, …, n;
s2, collecting the gas concentration x of the lower corner of the working face2；
S3, judging the gas extraction concentration X of the ith closed walliWhether the gas extraction concentration is less than the gas extraction concentration X of the (i-1) th closed walli-1If yes, go to step S4; if not, ending;
s4, judging the gas extraction concentration X of the ith closed walliWhether the gas extraction concentration X approaches zero or the ith closed walliWhether or not less than lower corner gas concentration x of the working face2If so, taking the intersection point of the symmetrical middle line of the ith closed wall and the (i-1) th closed wall and the upper edge of the working face as the first endpoint position, taking the position of the lower corner of the working face as the second endpoint position, and taking a curve l formed by connecting the first endpoint position and the second endpoint positioniThe concentration contour lines of the extraction affected area between the ith closure wall and the (i-1) th closure wall are taken as concentration contour lines, and different concentration contour lines are concentration fields of the gas in the goaf; if not, the process is ended.
2. The method for determining the gas concentration field of the goaf by using the goaf close-wall extraction data as claimed in claim 1, wherein: step S1 further includes: gas extraction concentration X corresponding to the ith closed walliThe concentration of the concentration contour line of the extraction influence position of the ith closed wall is taken as the concentration of the concentration contour line of the extraction influence position of the ith closed wall; and the concentration contour line of the extraction influence position of the ith closed wall is a connecting curve of the position of the ith closed wall and the position of the lower corner of the working face.
3. The method for determining the gas concentration field of the goaf by using the goaf close-wall extraction data as claimed in claim 1, wherein: step S2 further includes: collecting gas concentration x at upper corner of working face1And the gas concentration x at the upper corner is measured1The concentration of the concentration contour line of the extraction influence position as the upper corner; and the concentration contour line of the extraction influence position of the upper corner is a connecting curve of the position of the upper corner and the position of the lower corner of the working surface.
4. The method for determining the gas concentration field of the goaf by using the goaf close-wall extraction data as claimed in claim 1, wherein: in step S4, the concentration of the deviation position in the extraction influence region between the ith bulkhead and the (i-1) th bulkhead is determined by an interpolation method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011182620.3A CN112415137A (en) | 2020-10-29 | 2020-10-29 | Method for measuring gas concentration field of goaf by utilizing goaf closed wall extraction data |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011182620.3A CN112415137A (en) | 2020-10-29 | 2020-10-29 | Method for measuring gas concentration field of goaf by utilizing goaf closed wall extraction data |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112415137A true CN112415137A (en) | 2021-02-26 |
Family
ID=74826871
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011182620.3A Pending CN112415137A (en) | 2020-10-29 | 2020-10-29 | Method for measuring gas concentration field of goaf by utilizing goaf closed wall extraction data |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112415137A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323391A (en) * | 2011-08-25 | 2012-01-18 | 太原理工大学 | Gas distribution detection method in coal mine underground goaf |
| CN103046947A (en) * | 2011-10-14 | 2013-04-17 | 中国矿业大学(北京) | Gas extraction method by using major diameter pipeline and sealing transverses between mine goaf and tail roadway |
| CN109519212A (en) * | 2019-01-21 | 2019-03-26 | 中煤科工集团重庆研究院有限公司 | Device and method for extracting gas in large-diameter horizontal drilling bridging goaf |
| CN109630088A (en) * | 2018-12-05 | 2019-04-16 | 中煤科工集团重庆研究院有限公司 | Method for determining arrangement position of high-position drilling hole |
| CN111810221A (en) * | 2019-04-11 | 2020-10-23 | 河南理工大学 | Method for treating gas on mining face through pumping drainage of U-parallel U + upper corner |
-
2020
- 2020-10-29 CN CN202011182620.3A patent/CN112415137A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323391A (en) * | 2011-08-25 | 2012-01-18 | 太原理工大学 | Gas distribution detection method in coal mine underground goaf |
| CN103046947A (en) * | 2011-10-14 | 2013-04-17 | 中国矿业大学(北京) | Gas extraction method by using major diameter pipeline and sealing transverses between mine goaf and tail roadway |
| CN109630088A (en) * | 2018-12-05 | 2019-04-16 | 中煤科工集团重庆研究院有限公司 | Method for determining arrangement position of high-position drilling hole |
| CN109519212A (en) * | 2019-01-21 | 2019-03-26 | 中煤科工集团重庆研究院有限公司 | Device and method for extracting gas in large-diameter horizontal drilling bridging goaf |
| CN111810221A (en) * | 2019-04-11 | 2020-10-23 | 河南理工大学 | Method for treating gas on mining face through pumping drainage of U-parallel U + upper corner |
Non-Patent Citations (6)
| Title |
|---|
| MING GUO HUA等: "Research and Application of Mobile Gas-Extraction Technology on the Upper Corner of Working Face", 《ADVANCED MATERIALS RESEARCH》 * |
| 卢涛: "双U型通风综放工作面瓦斯分布规律研究", 《中国优秀博硕士学位论文全文数据库》 * |
| 牛建华: "基于数值模拟的塔山煤矿8104综放面瓦斯治理方案选择", 《华北科技学院学报》 * |
| 王德明: "《矿井通风安全理论与技术》", 31 August 1998, 中国矿业大学出版社 * |
| 翟国华: "Y型通风工作面瓦斯浓度分布规律及综合治理技术研究", 《煤矿现代化》 * |
| 赵少波: "基于U型通风系统的瓦斯治理试验研究", 《现代矿业》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| van Druenen et al. | CFD evaluation of building geometry modifications to reduce pedestrian-level wind speed | |
| CN111305286B (en) | Monitoring and verifying system and method for soil-rock double-element slope overall failure mode | |
| CN110763809B (en) | Experimental verification method for optimal arrangement scheme of gas detector | |
| CN111578150B (en) | Online real-time monitoring of oil gas delivery pipe network safety and early warning management system | |
| CN113605866B (en) | Dynamic regulation and control system and method for mine gas extraction | |
| CN114692457B (en) | Judgment method and processing method for tunnel machine-blocking risk of open TBM (tunnel boring machine) | |
| CN109448087A (en) | A kind of shield tunnel surface point cloud data segmentation method | |
| CN110727985A (en) | Method for predicting vertical deformation of existing subway tunnel adjacent to foundation pit engineering | |
| WO2023185025A1 (en) | Cabling stress analysis method and apparatus | |
| CN108036886A (en) | A kind of hobboing cutter cutter ring cutter hub mating surface positive pressure force test system and its test method | |
| CN111709078A (en) | Corridor visual modeling method based on BIM technology | |
| CN112415137A (en) | Method for measuring gas concentration field of goaf by utilizing goaf closed wall extraction data | |
| CN117275601B (en) | Determination method for sandstone type uranium deposit anomaly information | |
| CN109593958B (en) | Method for assisting ionic rare earth ore in-situ leaching process by three-dimensional remote sensing technology | |
| CN101718527A (en) | Method for calculating length of dry sand of tailings reservoir based on image recognition | |
| CN112288589B (en) | Method for measuring gas flow field of goaf by utilizing goaf closed wall extraction data | |
| CN113095008A (en) | Corrosion position determination method, device and medium based on flow field analysis in total station | |
| CN103267762B (en) | Coal slurry ash online detection system based on image method, and method | |
| CN112836350A (en) | Real-time resolving method for gas extraction parameters of coal mine down-pipe network | |
| CN117345201A (en) | Vertical shaft disease detection method based on holographic data | |
| CN112418645A (en) | Tunnel engineering full life cycle safety evaluation method | |
| CN104899416B (en) | A kind of prediction technique and its system of the anti-lamellar tearing performance of Steels for High Rise Buildings | |
| CN113536445B (en) | Simple determination method for tunnel longitudinal upward floating deformation caused by excavation of upper foundation pit | |
| CN113591172B (en) | Design method of three-dimensional comprehensive gas extraction visual management system | |
| Ye et al. | Numerical Statistic Approach for Peak Factor of Non‐Gaussian Wind Pressure on Building Claddings |
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 | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210226 |