CN113418966A - Tunnel looseness range nondestructive testing method and system based on direct current electrical method detection - Google Patents
Tunnel looseness range nondestructive testing method and system based on direct current electrical method detection Download PDFInfo
- Publication number
- CN113418966A CN113418966A CN202110722987.8A CN202110722987A CN113418966A CN 113418966 A CN113418966 A CN 113418966A CN 202110722987 A CN202110722987 A CN 202110722987A CN 113418966 A CN113418966 A CN 113418966A
- Authority
- CN
- China
- Prior art keywords
- roadway
- gradient
- looseness
- range
- area
- 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/041—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a solid body
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/20—Investigating the presence of flaws
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/18—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging
- G01V3/20—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current
- G01V3/22—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for well-logging operating with propagation of electric current using dc
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Remote Sensing (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geophysics (AREA)
- Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention provides a nondestructive testing method and a nondestructive testing system for a roadway looseness zone range based on direct current electrical method detection. According to the invention, the apparent resistivity gradient is obtained by a direct current method so as to determine the range of the roadway looseness area, so that the nondestructive testing of the roadway looseness area can be realized, and the reliability of the testing result is improved.
Description
Technical Field
The invention relates to the technical field of detection of surrounding rock structures of roadways, in particular to a nondestructive testing method and system for a roadway looseness area range based on direct-current electrical detection.
Background
The coal mine in China has the characteristics of high gas content, high gas pressure, complex occurrence conditions and the like, the drilling extraction is a common gas treatment means, and the drilling extraction effect is closely related to the hole sealing effect. Along with the increase of the mining depth of the mine, the mining conditions of the mine are complicated year by year, the phenomena of crack development, loosening and crushing, serious deformation and the like often occur to the surrounding rock of the roadway, how to quickly and accurately determine the loosening circle of the roadway and design the reasonable hole sealing length, so that the effective hole sealing of the drilled hole is a problem to be solved urgently.
At present, the method for testing the range of the roadway looseness ring is mainly carried out through drilling testing, belongs to testing in a point-area-surface mode, and is small in testing range, unreliable in testing result and difficult to carry out large-range comprehensive testing on the looseness ring around the roadway.
Disclosure of Invention
The invention aims to provide a nondestructive testing method and a nondestructive testing system for a roadway looseness area range based on direct current method detection, which can realize nondestructive testing of the roadway looseness area and improve the reliability of a testing result.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a nondestructive testing method for a range of a roadway looseness zone based on direct current electrical method detection, which comprises the following steps:
acquiring apparent resistivity acquired by a test electrode; the testing electrodes are arranged in a set measuring area and are uniformly arranged in the length direction of the roadway; the set measuring area is determined according to the area to be tested;
calculating the gradient of apparent resistivity corresponding to the adjacent test electrodes;
determining the gradient of the gradient value in the set range in the descending trend gradient as a target gradient, wherein the descending trend gradient comprises the gradient of which the gradient value is in a descending trend from the center of the test range to two ends;
and determining the loosening circle boundary of the roadway according to the roadway position corresponding to the target gradient.
Optionally, before acquiring the apparent resistivity acquired by the test electrode, the method further includes:
and in the length direction of the roadway, extending the to-be-tested area to two ends by a set length respectively to obtain an area, and determining the area as the set measuring area.
Optionally, in the length direction of the roadway, the test electrodes are uniformly arranged along a straight line on a top plate, a bottom plate, a left side and a right side of the roadway respectively.
Optionally, the determining a slack circle boundary of the roadway according to the roadway position corresponding to the target gradient specifically includes:
and determining the loosening circle boundary of the roadway according to the position corresponding to the test electrode which is close to the center of the area to be tested in the adjacent test electrodes corresponding to the target gradient.
Optionally, the set range is-0.2 to-0.3.
Optionally, the set length is 1.5 times of the length of the area to be tested along the roadway.
In order to achieve the above purpose, the invention also provides the following scheme:
a roadway looseness range nondestructive testing system based on direct current electrical method detection comprises:
the apparent resistivity acquisition module is used for acquiring the apparent resistivity acquired by the test electrode; the testing electrodes are arranged in a set measuring area and are uniformly arranged in the length direction of the roadway; the set measuring area is determined according to the area to be tested;
the gradient calculation module is used for calculating the gradient of the apparent resistivity corresponding to the adjacent test electrodes;
the target gradient determining module is used for determining the gradient of a descending trend gradient, of which the gradient value is in a set range, as a target gradient, wherein the descending trend gradient comprises a gradient of which the gradient value is in a descending trend from the center of the test range to two ends;
and the roadway looseness zone determining module is used for determining the looseness zone boundary of the roadway according to the roadway position corresponding to the target gradient.
Optionally, the system for nondestructive testing of the range of the roadway looseness zone based on the detection by the direct current electrical method further includes:
and the measuring region determining module is used for extending the to-be-tested region to two ends by a set length in the length direction of the roadway to obtain a region and determining the region as the set measuring region.
Optionally, in the length direction of the roadway, the test electrodes are uniformly arranged along a straight line on a top plate, a bottom plate, a left side and a right side of the roadway respectively.
Optionally, the module for determining a lane slack zone specifically includes:
and the roadway looseness zone determining submodule is used for determining the looseness zone boundary of the roadway according to the position corresponding to the test electrode which is close to the center of the area to be tested in the adjacent test electrodes corresponding to the target gradient.
According to the specific embodiment provided by the invention, the invention discloses the following technical effects:
the invention provides a nondestructive testing method and a nondestructive testing system for a roadway looseness zone range based on direct current electrical method detection. According to the invention, the apparent resistivity gradient is obtained by a direct current method so as to determine the range of the roadway looseness area, so that the nondestructive testing of the roadway looseness area can be realized, and the reliability of the testing result is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
FIG. 1 is a flow chart of a nondestructive testing method for a roadway looseness area range based on direct current electrical method detection;
FIG. 2 is a schematic diagram of a roadway structure of the nondestructive testing method for the roadway looseness area range based on direct current electrical detection;
fig. 3 is a schematic structural diagram of a module of the nondestructive testing system for the roadway looseness area range based on direct current electrical detection.
Description of the symbols:
the test method comprises the following steps of (1) a top plate-21, a bottom plate-22, a left side-23, a right side-24, a roadway overall loose circle boundary-25, a test range center-26, a direct current electrical method instrument-27 and a cable-28;
the device comprises an apparent resistivity acquisition module-31, a gradient calculation module-32, a target gradient determination module-33, a roadway loosening zone determination module-34 and a measurement area determination module-35.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a nondestructive testing method and a nondestructive testing system for a roadway looseness area range based on direct current method detection, which can realize nondestructive testing of the roadway looseness area and improve the reliability of a testing result.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
As shown in fig. 1, the nondestructive testing method for the roadway looseness area range based on the direct current electrical method detection of the invention comprises the following steps:
step S1: acquiring apparent resistivity acquired by a test electrode; the testing electrodes are arranged in a set measuring area and are uniformly arranged in the length direction of the roadway; the set measuring region is determined according to a region to be tested.
Step S2: and calculating the gradient of the apparent resistivity corresponding to the adjacent test electrodes.
Step S3: the gradient of the descending trend gradient, which includes a gradient in which the gradient value is in a decreasing trend from the center 26 of the test range to both ends, at the set range is determined as the target gradient.
Step S4: and determining the loosening circle boundary of the roadway according to the roadway position corresponding to the target gradient.
Optionally, before acquiring the apparent resistivity acquired by the test electrode, the method further includes step S0, which specifically includes:
and in the length direction of the roadway, extending the to-be-tested area to two ends by a set length respectively to obtain an area, and determining the area as the set measuring area.
Further, in the length direction of the roadway, the test electrodes are uniformly arranged on the top plate 21, the bottom plate 22, the left upper 23 and the right upper 24 of the roadway along a straight line.
Further, the determining the slack circle boundary of the roadway according to the roadway position corresponding to the target gradient specifically includes:
and determining the loosening circle boundary of the roadway according to the position corresponding to the test electrode which is close to the center of the area to be tested in the adjacent test electrodes corresponding to the target gradient.
Preferably, the set range is-0.2 to-0.3.
Further, the set length is 1.5 times of the length of the area to be tested along the roadway.
Specifically, the area to be tested is an area to be tested for a loosening ring along the length direction of the roadway, such as L shown in FIG. 20Then the set length is 1.5L0The set measurement region L1To extend the area to be tested to two ends by 1.5L0The region thus obtained is L1＝3L0。
In an embodiment of the present invention, step S2 specifically includes: and subtracting the apparent resistivity corresponding to the test electrode which is close to the center of the test range from the apparent resistivity corresponding to the test electrode which is far away from the center of the test range in the two adjacent test electrodes to obtain an apparent resistivity gradient value.
Further, step S3 specifically includes: determining the gradient of the descending trend gradient in the set range as the target gradient, wherein the descending trend gradient comprises the gradient of which the gradient value is in a descending trend from the center to two ends of the test range, namely, the gradient value is in a continuous descending trend from the center to the two ends of the test range, and the gradient value is in the set range, and the gradient value at the moment is the target gradient. For example, the partial gradient values calculated from the center 26 of the test range to both ends are: 0.9,0.67,0.39,0.12, -0.18, -0.29, -0.41, -0.52, a continuously decreasing trend of gradient values was observed, and the gradient value of the set range was-0.29, and-0.29 was noted as the target gradient. Furthermore, if the gradient values are: 0.9,0.67,0.39,0.12, -0.18, -0.29, 0.11, -0.16, it was observed that the gradient values did not show a decreasing trend, in which case-0.29 might be an outlier, and therefore-0.29 in this case could not be the target gradient.
Specifically, the testing electrodes are uniformly arranged on the top plate, the bottom plate, the left upper and the right upper of the roadway along a straight line respectively, in the specific embodiment of the invention, 64 electrodes are arranged in the set measuring area, and the distance between two adjacent electrodes is L2＝L1/63, i.e. resolution L2The test electrodes are connected to a dc meter 27 via cables 28. And in the testing process, the tests on the top plate, the bottom plate, the left upper and the right upper are independent. And connecting the obtained top plate loose collar boundary, the bottom plate loose collar boundary, the left upper loose collar boundary and the right upper loose collar boundary to obtain the roadway whole loose collar boundary 25.
In order to achieve the above purpose, the invention also provides the following scheme:
as shown in fig. 3, the system for nondestructive testing of the range of the roadway looseness zone based on the direct current electrical method detection of the invention comprises: the device comprises an apparent resistivity acquisition module 31, a gradient calculation module 32, a target gradient determination module 33 and a roadway looseness determination module 34.
The apparent resistivity acquisition module 31 is used for acquiring the apparent resistivity acquired by the test electrode; the testing electrodes are arranged in a set measuring area and are uniformly arranged in the length direction of the roadway; the set measuring region is determined according to a region to be tested.
And the gradient calculation module 32 is used for calculating the gradient of the apparent resistivity corresponding to the adjacent test electrodes.
And a target gradient determining module 33, configured to determine, as a target gradient, a gradient of a decreasing trend gradient in which the gradient value is located in the set range, where the decreasing trend gradient includes a gradient in which the gradient value decreases from the center of the test range to both ends of the test range.
And the roadway looseness zone determining module 34 is configured to determine a looseness zone boundary of the roadway according to the roadway position corresponding to the target gradient.
Further, the system for nondestructive testing of the range of the roadway looseness zone based on the direct current electrical method detection further comprises: a measurement area determination module 35.
And the measurement region determining module 35 is configured to determine, in the length direction of the roadway, a region obtained after the region to be tested extends to both ends by a set length as the set measurement region.
Furthermore, in the length direction of the roadway, the test electrodes are uniformly arranged on the top plate, the bottom plate, the left upper and the right upper of the roadway along straight lines respectively.
Specifically, the module 34 for determining a lane slack zone specifically includes:
and the roadway looseness zone determining submodule is used for determining the looseness zone boundary of the roadway according to the position corresponding to the test electrode which is close to the center of the area to be tested in the adjacent test electrodes corresponding to the target gradient.
The main advantages of the invention are:
1. the coal bed direct current method testing technology is nondestructive detection, large-scale drilling is not needed, and the operation is simple.
2. The method is continuous in testing the roadway loosening ring, and can effectively avoid the problems of small testing range, unreliable testing result and the like of a traditional method of 'point-area-surface'.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the system disclosed by the embodiment, the description is relatively simple because the system corresponds to the method disclosed by the embodiment, and the relevant points can be referred to the method part for description.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. The nondestructive testing method for the range of the roadway looseness area based on the direct current electrical method detection is characterized by comprising the following steps of:
acquiring apparent resistivity acquired by a test electrode; the testing electrodes are arranged in a set measuring area and are uniformly arranged in the length direction of the roadway; the set measuring area is determined according to the area to be tested;
calculating the gradient of apparent resistivity corresponding to the adjacent test electrodes;
determining the gradient of the gradient value in the set range in the descending trend gradient as a target gradient, wherein the descending trend gradient comprises the gradient of which the gradient value is in a descending trend from the center of the test range to two ends;
and determining the loosening circle boundary of the roadway according to the roadway position corresponding to the target gradient.
2. The nondestructive testing method for the roadway looseness zone range based on the direct current electrical method detection, according to claim 1, before the obtaining of the apparent resistivity acquired by the testing electrode, further comprising:
and in the length direction of the roadway, extending the to-be-tested area to two ends by a set length respectively to obtain an area, and determining the area as the set measuring area.
3. The nondestructive testing method for the range of the roadway looseness ring based on the direct current electrical method detection as recited in claim 1, wherein the testing electrodes are uniformly arranged on a top plate, a bottom plate, a left upper and a right upper of the roadway respectively along a straight line in the length direction of the roadway.
4. The nondestructive testing method for the range of the roadway looseness zone based on the direct current electrical method detection as recited in claim 1, wherein the determining of the boundary of the looseness zone of the roadway according to the roadway position corresponding to the target gradient specifically includes:
and determining the loosening circle boundary of the roadway according to the position corresponding to the test electrode which is close to the center of the area to be tested in the adjacent test electrodes corresponding to the target gradient.
5. The nondestructive testing method for the range of the roadway looseness zone based on the direct current electrical method detection, according to claim 1, wherein the set range is-0.2 to-0.3.
6. The nondestructive testing method for the range of the roadway looseness zone based on the direct current electrical method detection as recited in claim 1, wherein the set length is 1.5 times of the length of the area to be tested along the roadway.
7. The utility model provides a tunnel looseness area scope nondestructive test system based on direct current electrical method is surveyed which characterized in that, tunnel looseness area scope nondestructive test system based on direct current electrical method is surveyed includes:
the apparent resistivity acquisition module is used for acquiring the apparent resistivity acquired by the test electrode; the testing electrodes are arranged in a set measuring area and are uniformly arranged in the length direction of the roadway; the set measuring area is determined according to the area to be tested;
the gradient calculation module is used for calculating the gradient of the apparent resistivity corresponding to the adjacent test electrodes;
the target gradient determining module is used for determining the gradient of a descending trend gradient, of which the gradient value is in a set range, as a target gradient, wherein the descending trend gradient comprises a gradient of which the gradient value is in a descending trend from the center of the test range to two ends;
and the roadway looseness zone determining module is used for determining the looseness zone boundary of the roadway according to the roadway position corresponding to the target gradient.
8. The nondestructive testing system for the range of the roadway looseness zone based on the direct current electrical method detection of claim 7, wherein the nondestructive testing system for the range of the roadway looseness zone based on the direct current electrical method detection further comprises:
and the measuring region determining module is used for extending the to-be-tested region to two ends by a set length in the length direction of the roadway to obtain a region and determining the region as the set measuring region.
9. The nondestructive testing system for the range of the roadway looseness zone based on the direct current electrical detection of claim 7, wherein the testing electrodes are uniformly arranged on a top plate, a bottom plate, a left upper and a right upper of the roadway respectively along a straight line in the length direction of the roadway.
10. The nondestructive testing system for the range of the roadway looseness zone based on the direct current electrical method detection of claim 7, wherein the roadway looseness zone determining module specifically comprises:
and the roadway looseness zone determining submodule is used for determining the looseness zone boundary of the roadway according to the position corresponding to the test electrode which is close to the center of the area to be tested in the adjacent test electrodes corresponding to the target gradient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110722987.8A CN113418966B (en) | 2021-06-28 | 2021-06-28 | Tunnel looseness range nondestructive testing method and system based on direct current electrical method detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110722987.8A CN113418966B (en) | 2021-06-28 | 2021-06-28 | Tunnel looseness range nondestructive testing method and system based on direct current electrical method detection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113418966A true CN113418966A (en) | 2021-09-21 |
| CN113418966B CN113418966B (en) | 2022-02-11 |
Family
ID=77716924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110722987.8A Active CN113418966B (en) | 2021-06-28 | 2021-06-28 | Tunnel looseness range nondestructive testing method and system based on direct current electrical method detection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113418966B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115079285A (en) * | 2022-07-25 | 2022-09-20 | 北京科技大学 | Dynamic prediction method for coal bed gas outburst danger visualization area |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201401174Y (en) * | 2009-03-17 | 2010-02-10 | 安徽理工大学 | System monitoring broken rock zone by high-density electrical resistivity |
| CN102768369A (en) * | 2012-06-05 | 2012-11-07 | 武汉长盛煤安科技有限公司 | Roadway drivage drilling induced polarization advance water probing forecasting method, device and probe |
| CN104792965A (en) * | 2015-02-01 | 2015-07-22 | 山东科技大学 | Drilling energy-based surrounding rock loosing circle test method |
| CN107861159A (en) * | 2017-10-19 | 2018-03-30 | 中煤科工集团西安研究院有限公司 | Double Electric Dipole ground well transient electromagnetic detecting methods |
| CN108802193A (en) * | 2018-03-30 | 2018-11-13 | 中国平煤神马能源化工集团有限责任公司 | A kind of detecting devices and detection method of Exploring Loose Rock Country in Tunnels |
| CN111273355A (en) * | 2020-03-16 | 2020-06-12 | 中国科学技术大学 | Advanced detection method and advanced detection system for roadway |
| CN113008125A (en) * | 2021-02-25 | 2021-06-22 | 安徽省交通控股集团有限公司 | Tunnel surrounding rock internal deformation monitoring method |
-
2021
- 2021-06-28 CN CN202110722987.8A patent/CN113418966B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201401174Y (en) * | 2009-03-17 | 2010-02-10 | 安徽理工大学 | System monitoring broken rock zone by high-density electrical resistivity |
| CN102768369A (en) * | 2012-06-05 | 2012-11-07 | 武汉长盛煤安科技有限公司 | Roadway drivage drilling induced polarization advance water probing forecasting method, device and probe |
| CN104792965A (en) * | 2015-02-01 | 2015-07-22 | 山东科技大学 | Drilling energy-based surrounding rock loosing circle test method |
| CN107861159A (en) * | 2017-10-19 | 2018-03-30 | 中煤科工集团西安研究院有限公司 | Double Electric Dipole ground well transient electromagnetic detecting methods |
| CN108802193A (en) * | 2018-03-30 | 2018-11-13 | 中国平煤神马能源化工集团有限责任公司 | A kind of detecting devices and detection method of Exploring Loose Rock Country in Tunnels |
| CN111273355A (en) * | 2020-03-16 | 2020-06-12 | 中国科学技术大学 | Advanced detection method and advanced detection system for roadway |
| CN113008125A (en) * | 2021-02-25 | 2021-06-22 | 安徽省交通控股集团有限公司 | Tunnel surrounding rock internal deformation monitoring method |
Non-Patent Citations (2)
| Title |
|---|
| 王桦等: "基于高密度电阻率法的松动圈测试技术研究", 《煤炭科学技术》 * |
| 王桦等: "高密度电阻率法在望峰岗二副井马头门松动圈测试中的应用", 《煤矿安全》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115079285A (en) * | 2022-07-25 | 2022-09-20 | 北京科技大学 | Dynamic prediction method for coal bed gas outburst danger visualization area |
| CN115079285B (en) * | 2022-07-25 | 2022-11-08 | 北京科技大学 | Dynamic prediction method for coal bed gas outburst danger visualization area |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113418966B (en) | 2022-02-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106546366B (en) | A kind of umbellate form deep hole three-dimensional stress and displacement comprehensive test device | |
| US11365624B2 (en) | System and method for monitoring water inrush | |
| CN105510121B (en) | Concrete filled steel tube bow member casing plug joint large eccentricity experimental rig and application method | |
| CN105333904A (en) | Coal rock upward borehole gas parameter measurement method | |
| CN113418966B (en) | Tunnel looseness range nondestructive testing method and system based on direct current electrical method detection | |
| CN104481592A (en) | Surrounding rock pressure-frost heaving force monitoring system for tunnel in cold region and mounting method thereof | |
| CN104018830A (en) | Time and space evaluation method of coal seam hydraulic fracturing effect | |
| CN104343110B (en) | Bridge soil around pile washes away in-situ monitoring method and system | |
| CN104863635B (en) | A kind of automatic monitoring alarm and its using method of tunnel subsidence | |
| CN110359959B (en) | Method for rapidly measuring gas content and advance stress of coal face | |
| CN104406556A (en) | Comprehensive mechanized coal mining face support multi place-states and plunger descending amount measuring system and method | |
| CN202548085U (en) | Detection device for burial depth of dam cut-off wall | |
| CN106246162A (en) | Floor undulation is across borescopic imaging device and slip casting effect monitoring method | |
| CN109946155A (en) | A kind of steel bridge weld stress real-time monitoring device and application method | |
| CN202281762U (en) | Construction quality detection device for pile foundation | |
| CN209430206U (en) | Form duct pieces of shield tunnel | |
| CN203515560U (en) | Borehole stress monitoring device | |
| CN204086567U (en) | Resistivity Tomography device and system between horizontal drilling | |
| CN207728358U (en) | Multi-parameter sensor based on downhole testing | |
| CN104344785B (en) | Device for automatically testing amount of fine deformation of coal bed | |
| CN206974325U (en) | A kind of new read-only roadway roof absciss layer instrument | |
| CN103015974B (en) | A kind of oil-base mud logging instrument measuring probe | |
| CN108387444A (en) | A kind of continuous monitoring and control method of cased well pressure break based on well-in-situ potential imaging | |
| CN110374584B (en) | Visual detection method for roadway loosening ring and drilled hole air leakage area | |
| CN109372495B (en) | Oil gas well pressure detection while drilling device based on pressure sensor |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |