CN112540400A - Fracture zone dynamic pressure display strength and weakness degree judgment method - Google Patents
Fracture zone dynamic pressure display strength and weakness degree judgment method Download PDFInfo
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- CN112540400A CN112540400A CN202011504980.0A CN202011504980A CN112540400A CN 112540400 A CN112540400 A CN 112540400A CN 202011504980 A CN202011504980 A CN 202011504980A CN 112540400 A CN112540400 A CN 112540400A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000005422 blasting Methods 0.000 claims abstract description 15
- 238000012360 testing method Methods 0.000 claims abstract description 14
- 238000011160 research Methods 0.000 claims abstract description 6
- 238000009826 distribution Methods 0.000 claims abstract description 5
- 238000005520 cutting process Methods 0.000 claims abstract description 3
- 238000005553 drilling Methods 0.000 claims abstract description 3
- 239000002360 explosive Substances 0.000 claims abstract description 3
- 238000012544 monitoring process Methods 0.000 claims abstract description 3
- 239000011435 rock Substances 0.000 abstract description 19
- 239000003245 coal Substances 0.000 description 9
- 238000005065 mining Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 230000005641 tunneling Effects 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/02—Generating seismic energy
- G01V1/104—Generating seismic energy using explosive charges
- G01V1/108—Generating seismic energy using explosive charges by deforming or displacing surfaces of enclosures
- G01V1/112—Generating seismic energy using explosive charges by deforming or displacing surfaces of enclosures for use on the surface of the earth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V1/00—Seismology; Seismic or acoustic prospecting or detecting
- G01V1/28—Processing seismic data, e.g. for interpretation or for event detection
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- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Remote Sensing (AREA)
- Acoustics & Sound (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- Geophysics (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The invention discloses a method for judging the dynamic pressure display strength of a fault area, which comprises the following steps: step one, delineating a fracture region dynamic pressure display region: according to fault occurrence and roadway arrangement, carrying out danger research and judgment and monitoring on areas such as dense roadway groups and dense fault groups, and defining the areas with dynamic pressure danger; step two, equivalent vibration test: in a dynamic pressure dangerous area, dividing a plurality of test areas according to the distribution and the function of a roadway; blasting each test area with equal explosive quantity, wherein blasting parameters and processes are the same; arranging high-precision top and bottom plate dynamic instruments in a roadway around a blasting center, and observing the sinking speed after blasting; step three, dynamic pressure intensity judgment: comparing the observed sinking speed of the top plate by a chart, and judging the dynamic pressure showing strength; and (4) carrying out auxiliary research and judgment by combining the drilling cutting method dynamic phenomenon and the conventional mine pressure data. The method can quickly judge the dynamic pressure intensity and different dynamic pressure distribution characteristics, and has important significance for early warning of tectonic rock burst disasters.
Description
Technical Field
The invention belongs to the technical field of coal mining, and particularly relates to a fracture area dynamic pressure display strength and weakness degree judgment method.
Background
The dynamic pressure display such as coal mine rock burst and the like in China is closely related to geological conditions, and the rock burst in a geological structure area is easy to occur. With the increase of coal mining depth and mining boundary complexity, the frequency and the strength of rock burst in a structural area are continuously increased, the rock burst in a fault area occupies a larger proportion of the structural rock burst, and the fault area impact disaster seriously restricts the safe production of coal mines in China. Practice proves that the roadway is tunneled into a fault zone and penetrates through the roadway of the fault zone, and the fault zone belongs to a complex stress zone and a high stress zone, so that fault activated rock burst can occur under the engineering disturbance conditions of tunneling and the like, and the rock burst can be caused by the fault activated rock burst, so that the prevention difficulty is high, the support and protection are difficult, and the concealment is high. The prevention and control of the rock burst in the fault fracture zone is different from the conventional type and is difficult to prevent by adopting conventional measures. Because the coal (rock) body generates mixed impact, the pertinence of the conventional support is difficult to grasp, and if the conventional support is subjected to the strong disturbance action of a dynamic stress field of a working face, the rock burst with serious locality is easy to occur.
In the areas of dense roadway groups, dense chamber groups and dense coal pillar groups in fault zones, rock burst has strong concealment, so that sudden impact is often generated in the back of a roadway, the action of falling and movement of a large amount of rocks is accompanied, and the difficulty in recovery production is high afterwards. The impact risk such as a multi-fault intersection region and a fault concentrated pinch-out zone is extremely serious, and these regions are mostly located in deep structural stress parts such as a syncline shaft part and a basin region. Therefore, aiming at the fault area and the rock burst with hidden characteristics, the invention needs to invent a method which can quickly judge different distribution characteristics of dynamic pressure and the intensity of the dynamic pressure for the roadway with longer service life, and has important significance for early warning and constructing the rock burst disaster.
Disclosure of Invention
Technical problem to be solved
The invention aims to provide a method for quickly judging dynamic pressure characteristics aiming at the reality that dynamic pressure disasters are difficult to prevent when a coal seam with multiple faults and large mining depth occurs.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for judging the dynamic pressure display intensity of a fault area comprises the following steps:
step one, delineating a fracture region dynamic pressure display region: according to fault occurrence and roadway arrangement, carrying out danger research and judgment and monitoring on areas such as dense roadway groups and dense fault groups, and defining the areas with dynamic pressure danger;
step two, equivalent vibration test: in a dynamic pressure dangerous area, dividing a plurality of test areas according to the distribution and the function of a roadway; blasting each test area with equal explosive quantity, wherein blasting parameters and processes are the same; arranging high-precision top and bottom plate dynamic instruments in a roadway around a blasting center, and observing the sinking speed after blasting;
step three, dynamic pressure intensity judgment: comparing the observed sinking speed of the top plate by a chart, and judging the dynamic pressure showing strength; and (4) carrying out auxiliary research and judgment by combining the drilling cutting method dynamic phenomenon and the conventional mine pressure data.
The invention has the positive effects that:
(1) the dynamic pressure showing strength such as rock burst and the like can be quickly judged under the conditions of dense roadway groups, chamber groups, coal pillar groups and the like existing in the fault areas;
(2) aiming at the special vibration sensitivity of the fault area to dynamic pressure, a blasting vibration method is adopted, a high-precision dynamic instrument is used for obtaining the vibration display effect of the top plate, the dynamic pressure intensity is judged, and the method has an instant judgment effect on early warning of dynamic disasters such as rock burst and the like.
Drawings
Fig. 1 is a schematic view of a dangerous area, fig. 2 is a schematic view of blasting and testing, and fig. 3 is a schematic view of a decision curve.
Detailed Description
The embodiment of the invention provides a method for judging the dynamic pressure display strength of a fault area, which comprises the following steps: firstly, determining a display area: aiming at the roadway arrangement condition and function of a fault area (impact danger area), areas such as a roadway close cluster, a chamber cluster and a coal pillar cluster are mainly researched and judged, and a fault dynamic pressure danger area is defined, as shown in figure 1. W represents a fault-affected zone
II, vibration test: the method comprises the following steps of (1) refining a dangerous area into a plurality of test areas, carrying out the same test in each test area, arranging blasting drill holes at the relatively complete part of surrounding rock of a roadway, carrying out deep hole blasting according to conventional pressure relief blasting parameters, and arranging top plate dynamic instruments at intervals of 15m in the roadway outside a blasting point; observing the sinking amount of the top plate, as shown in figure 2; 0 represents the origin of coordinates of the observation zone and 1 represents the bit ceiling dynameter.
Thirdly, judging dynamic pressure intensity: and comparing the observed sinking speeds of the top plate by a chart, wherein the roadway with the high sinking speed of the top plate belongs to an area with high dynamic pressure display, A is a display obvious area, B is a weak display area, and C is a medium display area. See fig. 3.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (1)
1. A method for judging the dynamic pressure display intensity of a fault area is characterized in that: the method comprises the following steps:
step one, delineating a fracture region dynamic pressure display region: according to fault occurrence and roadway arrangement, carrying out danger research and judgment and monitoring on areas such as dense roadway groups and dense fault groups, and defining the areas with dynamic pressure danger;
step two, equivalent vibration test: in a dynamic pressure dangerous area, dividing a plurality of test areas according to the distribution and the function of a roadway; blasting each test area with equal explosive quantity, wherein blasting parameters and processes are the same; arranging high-precision top and bottom plate dynamic instruments in a roadway around a blasting center, and observing the sinking speed after blasting;
step three, dynamic pressure intensity judgment: comparing the observed sinking speed of the top plate by a chart, and judging the dynamic pressure showing strength; and (4) carrying out auxiliary research and judgment by combining the drilling cutting method dynamic phenomenon and the conventional mine pressure data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504980.0A CN112540400A (en) | 2020-12-18 | 2020-12-18 | Fracture zone dynamic pressure display strength and weakness degree judgment method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011504980.0A CN112540400A (en) | 2020-12-18 | 2020-12-18 | Fracture zone dynamic pressure display strength and weakness degree judgment method |
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| Publication Number | Publication Date |
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| CN112540400A true CN112540400A (en) | 2021-03-23 |
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| CN202011504980.0A Pending CN112540400A (en) | 2020-12-18 | 2020-12-18 | Fracture zone dynamic pressure display strength and weakness degree judgment method |
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| CN102562161A (en) * | 2011-11-14 | 2012-07-11 | 山东科技大学 | Method for determining energy release range of back way during impact coal seam roadway construction |
| CN102587983A (en) * | 2012-01-12 | 2012-07-18 | 山东科技大学 | Comprehensive early-warning observation method for coal mine rock burst |
| CN105275495A (en) * | 2015-09-30 | 2016-01-27 | 山东科技大学 | Method of judging hazard of shock waves |
| CN105626070A (en) * | 2015-12-14 | 2016-06-01 | 辽宁工程技术大学 | Rock burst prevention method through deep hole blasting and depressurizing |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN110905596A (en) * | 2019-12-13 | 2020-03-24 | 山东科技大学 | Hard roof type rock burst prevention and treatment method based on change of medium properties |
| CN110905528A (en) * | 2019-12-13 | 2020-03-24 | 山东科技大学 | Method for repairing rock burst dangerous roadway by strong disturbance and segmentation |
-
2020
- 2020-12-18 CN CN202011504980.0A patent/CN112540400A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001242258A (en) * | 2000-02-25 | 2001-09-07 | Taisei Corp | Damaging earthquake occurrence control method |
| US20100212960A1 (en) * | 2009-02-26 | 2010-08-26 | Joachim Loos | Method for optimizing the prediction and assessment of earthquakes and/or seismic vibrations |
| CN102392685A (en) * | 2011-09-12 | 2012-03-28 | 山东科技大学 | Dense roadway group rock burst hazard prediction method |
| CN102562161A (en) * | 2011-11-14 | 2012-07-11 | 山东科技大学 | Method for determining energy release range of back way during impact coal seam roadway construction |
| CN102587983A (en) * | 2012-01-12 | 2012-07-18 | 山东科技大学 | Comprehensive early-warning observation method for coal mine rock burst |
| CN105275495A (en) * | 2015-09-30 | 2016-01-27 | 山东科技大学 | Method of judging hazard of shock waves |
| CN105626070A (en) * | 2015-12-14 | 2016-06-01 | 辽宁工程技术大学 | Rock burst prevention method through deep hole blasting and depressurizing |
| CN106443784A (en) * | 2016-10-20 | 2017-02-22 | 山东科技大学 | Fault zone rock burst dangerousness monitoring method |
| CN110905596A (en) * | 2019-12-13 | 2020-03-24 | 山东科技大学 | Hard roof type rock burst prevention and treatment method based on change of medium properties |
| CN110905528A (en) * | 2019-12-13 | 2020-03-24 | 山东科技大学 | Method for repairing rock burst dangerous roadway by strong disturbance and segmentation |
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