CN101240718B - Down-hole mining space top board separation layer prealarming method - Google Patents
Down-hole mining space top board separation layer prealarming method Download PDFInfo
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- CN101240718B CN101240718B CN2008100143692A CN200810014369A CN101240718B CN 101240718 B CN101240718 B CN 101240718B CN 2008100143692 A CN2008100143692 A CN 2008100143692A CN 200810014369 A CN200810014369 A CN 200810014369A CN 101240718 B CN101240718 B CN 101240718B
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Abstract
The present invention discloses a warning method for underground fossick space top board, relates to method of stope of coal mines working surface top board and alley way top board breakaway. Abscisslayer velocity ratio Lambada<SUB>n<SUB> is mainly used as warning index to warning by judging if one the time absciss layer velocity ratio exceed terminal absciss layer velocity ratio. Because abscisslayer velocity ratio Lambada<SUB>n</SUB> is unchangeable in same rock formation and different tunnel place, this can avoid affection to top board breakaway warning result caused by different abscisslayer sensor place in fossick space, and insure equivalence character of absciss layer monitoring warning at all place which is possible to generating absciss layer, and improving absciss layer prophesy accuracy.
Description
Technical field
The invention belongs to the coal mining technical field, especially the method for stope working surface of coal mines top board and back inbreak.
Background technology
In stope working surface of coal mines exploitation and tunnelling process, when top board hangs when revealing certain area, top board will inbreak, causes personnel's injures and deaths.Usually, the most dangerous top plate thickness is the top board of 3～5 meters scopes in bottom, generally will forecast the inbreak of this part top board.
At present, the forecast monitoring instrument of roof delamination is comprised mechanical type (artificial reading), electromagnetic conversion formula (self-timing reading and storage data, manually peek with extension set) and absciss layer telemetry observation system (self-timing reading and storage data, automatically be transferred to ground-based computer), and these monitoring meanss play positive role to preventing roof collapse.But, carrying out aspect the roof collapse early warning processing, all be based on specified place roof delamination value size and absciss layer velocity magnitude to monitoring the absciss layer data, carry out the roof collapse early warning by given threshold value.Because different location roof delamination amount and absciss layer speed are different, for example roof delamination amount that monitors in place, middle part, tunnel and absciss layer speed will be much larger than helping to locate roof delamination amount and absciss layer speed near two, therefore, for same tunnel, because the threshold value of roof delamination inbreak is a given constant, will occur like this causing deviation is appearred in the same area roof delamination inbreak forecast result because of the difference of absciss layer instrument installation site, bring very big influence still for the reliability of mining operation safety, cause in the tunnel that delamination monitoring is arranged still to have the phenomenon that roof fall accident takes place.Therefore, be sought after the pre existing alarm method is improved, eliminate the deviation of installing the roof collapse forecast result that the difference of position causes because of delamination monitoring.At present the research of this respect is not seen as yet the report of domestic and international similar research.
Summary of the invention
The objective of the invention is deficiency, propose a kind of forecast result method for early warning comparatively accurately at above-mentioned roof delamination inbreak forecast.
Technical scheme of the present invention is:
One, the absciss layer sensor of automatic reading and storage data is installed in the punching of monitoring place, in floor mounted absciss layer telemetry observation system, the absciss layer sensor is gathered the bed separation displacement data at regular intervals, and deposits transfer of data in associated data files to the absciss layer telemetry observation system.
Two, the bed separation displacement data are handled and roof delamination inbreak early warning
By the absciss layer telemetry observation system bed separation displacement data that collect are handled, concrete steps are:
1, the bed separation displacement data increment h to collecting
nObtain absciss layer velocity amplitude v divided by data acquisition m blanking time
n, i.e. v
n=h
n/ m.
Calculate a certain moment absciss layer velocity rate λ
n, that is:
Limit absciss layer velocity rate λ when 2, monitoring place roof collapse being set
' n, i.e. absciss layer warning constant threshold.
3, judge a certain moment absciss layer velocity rate λ
nWhether surpass the constant threshold values of setting,, judge that absciss layer is about to take place, make corresponding early warning as surpassing the constant threshold values.
Good effect of the present invention is:
Adopt absciss layer velocity rate λ
nAs warning index, because absciss layer velocity rate λ
nPositions, tunnel different in same rock stratum are constant, can avoid like this installing the difference of position and the result of roof collapse early warning is exerted an influence at digging space internal cause absciss layer sensor, guarantee the equivalence that carries out the delamination monitoring early warning in all positions that the absciss layer zone might take place, improve the absciss layer accuracy of the forecast.
Description of drawings
Fig. 1 is an absciss layer sensor fitting arrangement;
Fig. 2 is two sensor absciss layer hodographs that record;
Fig. 3 handles the absciss layer velocity rate figure that obtains through data;
Fig. 4 is the data handling procedure theory diagram.
The specific embodiment
Concrete enforcement according to certain ore deposit further specifies method of the present invention below.
Example: 2.8 meters of certain pit coal layer thicknesses, top board are 1.6 meters siltstone and 3.0 meters medium sandstone from bottom to top, 4 meters of span lengths, 2.8 meters of height.In order to carry out the accurate forecast of roof delamination,, adorn 1# absciss layer sensor, 2# absciss layer sensor (as shown in Figure 1) be installed from 0.2 meter of right side group at middle part, tunnel 2 meter amperes in floor mounted absciss layer telemetry observation system.Set per 10 minutes and gather a secondary data, the absciss layer telemetry observation system is received and is deposited data file in behind the displacement data and handle.During processing, carry out according to second step in the technical scheme, processing procedure is sent warning as shown in Figure 4 when the absciss layer velocity rate is 0.6.
In processing procedure, can obtain 1# and the hodograph of 2# absciss layer sensor and absciss layer velocity rate figure shown in Figure 3 as shown in Figure 2.As can be seen from Figure 2, top board middle part 1# absciss layer sensor absciss layer speed 19mm/h during roof collapse, and only be 6mm/h by helping 2# absciss layer sensor absciss layer speed; As can be seen from Figure 3, top board middle part 1# absciss layer sensor and almost equal by the 2# of group absciss layer sensor absciss layer velocity rate during roof collapse is all about 0.6.Result of the test shows, though absciss layer sensor installation site difference, but the absciss layer velocity rate that finally monitors is almost equal, avoided that different early warning exerts an influence to roof collapse because of the absciss layer sensor is installed the position, this has fully verified the reliability and the science of this method for early warning, can effectively avoid the defective because of monitoring place branch Different Effects early warning result.
Claims (1)
1. the method for early warning of a down-hole mining space top board absciss layer is characterized in that, it may further comprise the steps:
(1) automatic reading is installed and stores the absciss layer sensor of data in the punching of monitoring place, in floor mounted absciss layer telemetry observation system, the absciss layer sensor is gathered the bed separation displacement data at regular intervals, and deposits transfer of data in associated data files to the absciss layer telemetry observation system;
(2) the bed separation displacement data are handled and roof delamination inbreak early warning
By the absciss layer telemetry observation system bed separation displacement data that collect are handled, concrete steps are:
1. the bed separation displacement data increment h to collecting
nObtain absciss layer velocity amplitude v divided by data acquisition m blanking time
n, i.e. v
n=h
n/ m;
Calculate a certain moment absciss layer velocity rate λ
n, that is:
Limit absciss layer velocity rate λ when 2. monitoring place roof collapse is set
n 1, i.e. absciss layer warning constant threshold;
3. judge a certain moment absciss layer velocity rate λ
nWhether surpass the constant threshold values of setting,, judge that absciss layer is about to take place, make corresponding early warning as surpassing the constant threshold values.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100143692A CN101240718B (en) | 2008-03-10 | 2008-03-10 | Down-hole mining space top board separation layer prealarming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100143692A CN101240718B (en) | 2008-03-10 | 2008-03-10 | Down-hole mining space top board separation layer prealarming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101240718A CN101240718A (en) | 2008-08-13 |
| CN101240718B true CN101240718B (en) | 2010-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008100143692A Expired - Fee Related CN101240718B (en) | 2008-03-10 | 2008-03-10 | Down-hole mining space top board separation layer prealarming method |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102913285B (en) * | 2012-11-02 | 2015-06-17 | 中滦科技有限公司 | Mine roof hazard warning method |
| CN103244185B (en) * | 2013-05-10 | 2015-06-24 | 山东科技大学 | Early warning method for instability of bolt-supported roadway roof separation |
| CN103603690B (en) * | 2013-11-14 | 2015-11-18 | 中国矿业大学 | A kind of method of geologic radar detection roof delamination and accident early warning |
| CN113685230B (en) * | 2021-04-08 | 2023-08-22 | 中铁十六局集团有限公司 | Safety early warning method and device for tunnel construction process, medium and electronic equipment |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818235A (en) * | 2006-03-27 | 2006-08-16 | 天地科技股份有限公司 | Determination of top-plate structural variation and separating layer |
| CN1834405A (en) * | 2006-04-13 | 2006-09-20 | 山东科技大学 | Remote monitoring precasting method of empty zone hard top plate |
-
2008
- 2008-03-10 CN CN2008100143692A patent/CN101240718B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1818235A (en) * | 2006-03-27 | 2006-08-16 | 天地科技股份有限公司 | Determination of top-plate structural variation and separating layer |
| CN1834405A (en) * | 2006-04-13 | 2006-09-20 | 山东科技大学 | Remote monitoring precasting method of empty zone hard top plate |
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| CN101240718A (en) | 2008-08-13 |
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