CN105781523A - Method for measuring swelling capacity of coal seam through ground drilling - Google Patents
Method for measuring swelling capacity of coal seam through ground drilling Download PDFInfo
- Publication number
- CN105781523A CN105781523A CN201610117801.5A CN201610117801A CN105781523A CN 105781523 A CN105781523 A CN 105781523A CN 201610117801 A CN201610117801 A CN 201610117801A CN 105781523 A CN105781523 A CN 105781523A
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- China
- Prior art keywords
- measured
- coal seam
- displacement
- steel wire
- ferrule
- 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
- 239000003245 coal Substances 0.000 title claims abstract description 44
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000005553 drilling Methods 0.000 title claims abstract description 11
- 230000008961 swelling Effects 0.000 title abstract description 4
- 238000006073 displacement reaction Methods 0.000 claims abstract description 49
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 46
- 239000010959 steel Substances 0.000 claims abstract description 46
- 239000004677 Nylon Substances 0.000 claims abstract description 9
- 229920001778 nylon Polymers 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims abstract description 7
- 238000012360 testing method Methods 0.000 claims description 9
- 239000011083 cement mortar Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N iron Substances [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 abstract description 2
- 239000002184 metal Substances 0.000 abstract 5
- 239000004568 cement Substances 0.000 abstract 1
- 239000011440 grout Substances 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000011835 investigation Methods 0.000 description 2
- 238000005065 mining Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 210000000078 claw Anatomy 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geophysics (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
The invention relates to a method for measuring swelling capacity of a coal seam through ground drilling. The method is performed through steel wires, metal heads, nylon sleeves, a displacement determining instrument and the like. Drilling construction is performed on the ground until a hole is drilled below a bottom plate of the coal seam to be measured, the two metal heads are separately placed at a top plate of the coal seam to be measured and the bottom plate of the coal seam to be measured through the drilled hole, the metal heads are connected with the displacement determining instrument through the steel wires, the nylon sleeves sleeve the steel wires, and free sliding between the steel wires and the sleeves is maintained; the drilled hole is filled with cement grout, so that the metal heads are fixed. After an lower coal seam of the coal seam to be measured is exploited, the metal heads move along with the subsidence of the top plate of the coal seam to be measure and the bottom plate of the coal seam to be measured, the displacement determining instrument is used for monitoring and recording the displacement capacity of the steel wires, and the swelling capacity of the coal seam to be measured is obtained through the difference value between the displacement capacity of the top plate of the coal seam to be measured and the displacement capacity of the bottom plate of the coal seam to be measured, and is displayed in a real-time manner through a digital displaying displayer. According to the method disclosed by the invention, the operation is simple, the position of the top plate and the position of the bottom plate are accurate to control, the measurement is precise, errors caused by artificial reading are avoided, and the method has the advantages that collecting points are accurate and collecting data is precise.
Description
Technical field
The invention belongs to coal mining and field of coal mine safety, the test being specifically related in protective coat extracted coal seam swell increment.
Background technology
Theoretical research and engineering practice show, projecting coal bed exploitation protective coat extracted technology is the measure of most effective, the safest and the most most economical preventing and treating coal and gas prominent.By the exploitation of protective layer, roof and floor contiguous coal rock layer in goaf destroys, mobile and deformation, causes the redistribution of roof and floor coal and rock stress field and crack field, and the pressure relief gas pumping mining for adjacent coal seam provides advantage." preventing and treating coal and gas prominent regulation " requirement according to State Administration of Quality and Technical Supervision's issuing and implementation in 2009; if the maximum swelling deflection of protected seam is more than 3 ‰; then inspection and investigation result can be used for same protective layer and the protected seam in other regions, and therefore Accurate Determining protective layer dilatancy measurer is significant.
At present; protective coat extracted adopts deep base point method more for the investigation of roof and floor displacement and coal seam swell increment; basic point mostly is mechanical wedge-type or claw displacement meter; calculated protected seam roof and floor displacement and coal seam swell increment by the variation length of manual measurement displacement meter, there is displacement meter and place the shortcomings such as reading workload not in place, artificial is big, error in data is big, operational danger is high.
Summary of the invention
For prior art above shortcomings, the invention provides a kind of construction safety, simple to operate, data monitoring is accurate, measuring point is accurate, the method for digital independent convenient surface drilling test coal seam swell increment.
In order to solve above-mentioned technical problem, present invention employs following technical scheme:
The method of a kind of surface drilling test coal seam swell increment, the method comprises the steps:
1) corresponding in the middle part of bearing to be measured with tendency one aperture of correct position construction, ground is the boring of 100mm, and boring certainly faces down and constructs to below seat earth 5m to be measured；
2) one end of ferrule a with the steel wire a that diameter is 5mm is welded, one end of ferrule b with the steel wire b that diameter is 5mm is welded；
3) utilize steel wire a that ferrule a delivers to roof place to be measured, utilize steel wire b that ferrule b delivers to seat earth place to be measured；
4) outside steel wire a and steel wire b, overlap the internal diameter nylon sleeve more than or equal to 6mm respectively, keep steel wire a and steel wire b respectively with nylon sleeve thereon slidably；
5) other end of the other end of steel wire a and steel wire b is respectively connected to the distinct interface of determining displacement instrument, keeps steel wire a and steel wire b to be in tension；
6) boring is filled cement mortar；
7) when underlying seam starts to exploit, start displacement analyzer, start to monitor the swell increment in the displacement of roof to be measured, the displacement of seat earth to be measured and coal seam to be measured.
As a preferred embodiment of the present invention, described ferrule a and ferrule b is the solid-iron cylinder of diameter 50mm, high 200mm.
Another kind of preferred version as the present invention, the displacement signal of collection is converted to digital signal by described determining displacement instrument, within every 30 minutes, gather once, being able to record that and store data volume no less than 180 days, display shows the displacement of roof to be measured, the displacement of seat earth to be measured and the swell increment in coal seam to be measured obtained by the displacement of roof to be measured and the displacement mathematic interpolation of seat earth to be measured in real time.
Compared with prior art, present invention have the advantage that
1, after the underlying seam exploitation in coal seam to be measured, ferrule is moved along with the sinking of roof to be measured and seat earth to be measured, the displacement of steel wire is monitored and recorded to determining displacement instrument, obtained the swell increment in coal seam by the difference of roof to be measured and seat earth displacement to be measured, shown in real time by the display of numerical monitor.The present invention adopts simple to operate, and roof to be measured and seat earth position control to be measured are accurate, measures accurately, it is to avoid the error of artificial reading, have collection point accurately, gather the accurate advantage of data.
2, the method holed by ground construction, it is to avoid the danger of downhole operations, requires to reduce to the explosion-proof performance of detection equipment, method construction safety proposed by the invention, and simple to operate, data monitoring is accurate, and measuring point is accurate, and digital independent is convenient.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of surface drilling test coal seam settling amount；
Fig. 2 is the Fig. 1 profile along A-A direction.
In accompanying drawing: 1 coal seam to be measured；2 borings；3 seat earths to be measured；4 roofs to be measured；5 ferrule a；6 ferrule b；7 steel wire a；8 steel wire b；9 nylon sleeves；10 underlying seams；11 supports；12 determining displacement instrument；13 display.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The method of a kind of surface drilling test coal seam swell increment, the method comprises the steps:
1) move towards the boring 2 that ground correct position construction one aperture be 100mm corresponding with being inclined to middle part in coal seam 1 to be measured, boring 2 certainly faces down and constructs to below seat earth 5m to be measured.
2) one end of ferrule a5 with the steel wire a7 that diameter is 5mm is welded, one end of ferrule b6 with the steel wire b8 that diameter is 5mm is welded.
3) utilize steel wire a7 that ferrule a5 delivers to roof 4 place to be measured, utilize steel wire b8 that ferrule b6 delivers to seat earth 3 place to be measured.
4) outside steel wire a7 and steel wire b8, overlap the internal diameter nylon sleeve 9 more than or equal to 6mm respectively, keep steel wire a7 and steel wire b8 respectively with nylon sleeve 9 thereon slidably.
5) other end of the other end of steel wire a7 and steel wire b8 is respectively connected to the distinct interface of determining displacement instrument 12, keeps steel wire a7 and steel wire b8 to be in tension.
6) boring 2 being filled cement mortar, its structure is as shown in Figure 1, 2.
7) when underlying seam 10 starts to exploit, start displacement analyzer 12, start to monitor the swell increment in the displacement of roof 4 to be measured, the displacement of seat earth to be measured 3 and coal seam to be measured 1.
Ferrule a5 and ferrule b6 is the solid-iron cylinder of diameter 50mm, high 200mm.Be provided above a support 11, determining displacement instrument 12 and display 13 in boring 2 are installed on support 11.The displacement signal of collection is converted to digital signal by determining displacement instrument 12, within every 30 minutes, gather once, being able to record that and store data volume no less than 180 days, display 13 shows the displacement of roof 4 to be measured, the displacement of seat earth to be measured 3 and the swell increment in coal seam to be measured 1 obtained by the displacement of roof 4 to be measured and the displacement mathematic interpolation of seat earth to be measured 3 in real time.After underlying seam 10 exploitation in coal seam 1 to be measured, ferrule a5 and ferrule b6 is moved along with the sinking of roof 4 to be measured and seat earth to be measured 3, steel wire a7 and the displacement of steel wire b8 are monitored and recorded to determining displacement instrument 12, obtained the swell increment in coal seam 1 to be measured by the difference of roof 4 to be measured and the displacement of seat earth to be measured 3, shown in real time by the display 13 of numerical monitor.
What finally illustrate is, above example is only in order to illustrate technical scheme and unrestricted, although the present invention being described in detail with reference to preferred embodiment, it will be understood by those within the art that, technical scheme can be modified or equivalent replacement, without deviating from objective and the scope of technical solution of the present invention, it all should be encompassed in the middle of scope of the presently claimed invention.
Claims (3)
1. the method for a surface drilling test coal seam swell increment, it is characterised in that the method comprises the steps:
1) moving towards the boring (2) that ground correct position construction one aperture be 100mm corresponding with tendency middle part in coal seam to be measured (1), boring (2) certainly faces down and constructs to seat earth to be measured (3) below 5m；
2) one end of ferrule a (5) with steel wire a (7) that diameter is 5mm is welded, one end of ferrule b (6) with steel wire b (8) that diameter is 5mm is welded；
3) utilize steel wire a (7) that ferrule a (5) is delivered to roof to be measured (4) place, utilize steel wire b (8) that ferrule b (6) is delivered to seat earth to be measured (3) place；
4) put outward the internal diameter nylon sleeve (9) more than or equal to 6mm respectively at steel wire a (7) and steel wire b (8), keep steel wire a (7) and steel wire b (8) respectively with nylon sleeve thereon (9) slidably；
5) other end of the other end of steel wire a (7) and steel wire b (8) is respectively connected to the distinct interface of determining displacement instrument (12), keeps steel wire a (7) and steel wire b (8) to be in tension；
6) boring (2) is filled cement mortar；
7) when underlying seam (10) starts to exploit, start displacement analyzer (12), start to monitor the swell increment of the displacement of roof to be measured (4), the displacement of seat earth to be measured (3) and coal seam to be measured (1).
2. the method for a kind of surface drilling according to claim 1 test coal seam swell increment, it is characterised in that described ferrule a (5) and ferrule b (6) is the solid-iron cylinder of diameter 50mm, high 200mm.
3. the method for a kind of surface drilling according to claim 1 test coal seam swell increment, it is characterized in that, the displacement signal of collection is converted to digital signal by described determining displacement instrument (12), within every 30 minutes, gather once, it is able to record that the data volume stored no less than 180 days, display (13) shows the displacement of roof to be measured (4) in real time, the displacement of seat earth to be measured (3) and the swell increment in coal seam to be measured (1) obtained by the displacement of roof to be measured (4) and the displacement mathematic interpolation of seat earth to be measured (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117801.5A CN105781523A (en) | 2016-03-02 | 2016-03-02 | Method for measuring swelling capacity of coal seam through ground drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610117801.5A CN105781523A (en) | 2016-03-02 | 2016-03-02 | Method for measuring swelling capacity of coal seam through ground drilling |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105781523A true CN105781523A (en) | 2016-07-20 |
Family
ID=56387700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610117801.5A Pending CN105781523A (en) | 2016-03-02 | 2016-03-02 | Method for measuring swelling capacity of coal seam through ground drilling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105781523A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727453A (en) * | 2020-12-14 | 2021-04-30 | 重庆大学 | Method for measuring protection range of protected layer |
| CN113063366A (en) * | 2021-04-07 | 2021-07-02 | 中国矿业大学(北京) | Method for measuring expansion deformation rate in inclined protected coal seam |
| CN113091629A (en) * | 2021-04-07 | 2021-07-09 | 中国矿业大学(北京) | Method for measuring expansion deformation rate in horizontally protected coal seam |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1105954A (en) * | 1964-05-19 | 1968-03-13 | Coal Industry Patents Ltd | Roof convergence measuring device |
| CN2688894Y (en) * | 2004-03-22 | 2005-03-30 | 泰安市龙洛卡自动化仪表有限公司 | Surrounding rock separated layer monitoring alarm instrument |
| AU2004210565A1 (en) * | 2003-09-18 | 2005-04-07 | Hilti Aktiengesellschaft | Anchor Bolt |
| CN2709927Y (en) * | 2004-07-27 | 2005-07-13 | 西安科技大学 | Multi-point displacement measuring indicating instrument for rock separation layer |
| CN101832745A (en) * | 2010-03-26 | 2010-09-15 | 山东科技大学 | Multi-position base plate delaminating monitor and using method thereof |
| CN202229698U (en) * | 2011-04-20 | 2012-05-23 | 安波 | Out-of-plane monitoring device for displacement of surrounding rock of laneway |
| CN202329524U (en) * | 2011-11-14 | 2012-07-11 | 中国矿业大学 | Measurement device for expansive deformation amount of protected coal seam |
| CN203203551U (en) * | 2013-03-19 | 2013-09-18 | 于俊洋 | Protected coal seam expansion deformation and coal seam floor seam separation amount determination device |
| CN203518948U (en) * | 2013-10-25 | 2014-04-02 | 中国矿业大学 | Monitoring device for roof separation of mining fiber grating |
| CN203669927U (en) * | 2013-07-23 | 2014-06-25 | 新疆大学 | Gob-side entry retaining mine ground pressure monitoring system |
| CN104344785A (en) * | 2014-11-12 | 2015-02-11 | 河南理工大学 | Device for automatically testing amount of fine deformation of coal bed |
| CN104482914A (en) * | 2014-12-30 | 2015-04-01 | 中国矿业大学 | Swelling distortion magnitude measuring device for long-distance protected coal seam |
| CN204575041U (en) * | 2015-04-01 | 2015-08-19 | 中国矿业大学(北京) | A kind of anchor cable formula instrument of roof separation |
-
2016
- 2016-03-02 CN CN201610117801.5A patent/CN105781523A/en active Pending
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1105954A (en) * | 1964-05-19 | 1968-03-13 | Coal Industry Patents Ltd | Roof convergence measuring device |
| AU2004210565A1 (en) * | 2003-09-18 | 2005-04-07 | Hilti Aktiengesellschaft | Anchor Bolt |
| CN2688894Y (en) * | 2004-03-22 | 2005-03-30 | 泰安市龙洛卡自动化仪表有限公司 | Surrounding rock separated layer monitoring alarm instrument |
| CN2709927Y (en) * | 2004-07-27 | 2005-07-13 | 西安科技大学 | Multi-point displacement measuring indicating instrument for rock separation layer |
| CN101832745A (en) * | 2010-03-26 | 2010-09-15 | 山东科技大学 | Multi-position base plate delaminating monitor and using method thereof |
| CN202229698U (en) * | 2011-04-20 | 2012-05-23 | 安波 | Out-of-plane monitoring device for displacement of surrounding rock of laneway |
| CN202329524U (en) * | 2011-11-14 | 2012-07-11 | 中国矿业大学 | Measurement device for expansive deformation amount of protected coal seam |
| CN203203551U (en) * | 2013-03-19 | 2013-09-18 | 于俊洋 | Protected coal seam expansion deformation and coal seam floor seam separation amount determination device |
| CN203669927U (en) * | 2013-07-23 | 2014-06-25 | 新疆大学 | Gob-side entry retaining mine ground pressure monitoring system |
| CN203518948U (en) * | 2013-10-25 | 2014-04-02 | 中国矿业大学 | Monitoring device for roof separation of mining fiber grating |
| CN104344785A (en) * | 2014-11-12 | 2015-02-11 | 河南理工大学 | Device for automatically testing amount of fine deformation of coal bed |
| CN104482914A (en) * | 2014-12-30 | 2015-04-01 | 中国矿业大学 | Swelling distortion magnitude measuring device for long-distance protected coal seam |
| CN204575041U (en) * | 2015-04-01 | 2015-08-19 | 中国矿业大学(北京) | A kind of anchor cable formula instrument of roof separation |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112727453A (en) * | 2020-12-14 | 2021-04-30 | 重庆大学 | Method for measuring protection range of protected layer |
| CN113063366A (en) * | 2021-04-07 | 2021-07-02 | 中国矿业大学(北京) | Method for measuring expansion deformation rate in inclined protected coal seam |
| CN113091629A (en) * | 2021-04-07 | 2021-07-09 | 中国矿业大学(北京) | Method for measuring expansion deformation rate in horizontally protected coal seam |
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| C06 | Publication | ||
| PB01 | Publication | ||
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| RJ01 | Rejection of invention patent application after publication | ||
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Application publication date: 20160720 |