CN106522950A - Method for monitoring rock burst risk of soft coal roadway posterior - Google Patents
Method for monitoring rock burst risk of soft coal roadway posterior Download PDFInfo
- Publication number
- CN106522950A CN106522950A CN201610915666.9A CN201610915666A CN106522950A CN 106522950 A CN106522950 A CN 106522950A CN 201610915666 A CN201610915666 A CN 201610915666A CN 106522950 A CN106522950 A CN 106522950A
- Authority
- CN
- China
- Prior art keywords
- anchor cable
- pressure
- tunnel
- roadway
- rock burst
- 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
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/18—Methods of underground mining; Layouts therefor for brown or hard coal
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D20/00—Setting anchoring-bolts
- E21D20/003—Machines for drilling anchor holes and setting anchor bolts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/008—Anchoring or tensioning means
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D21/00—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection
- E21D21/02—Anchoring-bolts for roof, floor in galleries or longwall working, or shaft-lining protection having means for indicating tension
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
Abstract
The invention discloses a method for monitoring a rock burst risk of a soft coal roadway posterior. The method comprises the following steps of firstly dividing a high-stress zone of a roadway in a rock burst appearing zone of a roadway posterior during tunneling of a soft coal roadway; then punching anchor cable holes and installing anchor cables in the high-stress zone, wherein during installation, W-shaped steel straps of which the side length is greater than 40cm are firstly arranged on the outer ends of the anchor cables in a sleeving way, then dynamometers are sleeved, and then trays are additionally arranged and are fastened by nuts; observing and recording pressure change situations of the dynamometers in real time, wherein when the interior pressure increment of a coal bed changes suddenly, a sudden change zone is verified to have the rock burst risk. Because of large contact area between the adopted W-shaped steel straps and coal wall surface, the steel straps change obviously when the interior pressure increment of the coal bed changes suddenly, the dynamometers have sensibility, and the rock burst risk of the soft coal roadway posterior can be judged according to the characteristics of easiness in stress expansion and occurrence of sudden change of a soft coal bed.
Description
Technical field
The invention belongs to Coal Mining Technology field.
Background technology
At present, the coal seam in field of mining for coal body hardness f less than or equal to 1.0 is referred to as soft seam.In soft seam tunnel
During driving, the tunnel way of escape is in dynamic change state all the time, if the tunnel during tunnelling is met head on, front is with structure
Make, situations such as coal rock layer textural anomaly, gas are abnormal, it is dangerous with bump.The monitoring of bump is in theoretical and skill
Although achieving significant progress in art, for example, current bump danger monitoring method, including drilling cuttings method, physical method,
Stress monitoring method, ore deposit platen press, the aqueous change in coal seam, surrouding rock deformation etc..Due to bump complexity, randomness, sudden, broken
The multiformity of bad form so that the dangerous monitoring of bump is sometimes often not accurate enough, and these methods are only adapted to typically
The monitoring of the bump in coal seam, is not suitable with the low soft seam of coal body hardness.For example, using drilling cuttings method monitor, due to coal seam it is soft,
Coal body can be disturbed, causes Monitoring Data bigger than normal；Using stress monitoring method, as coal seam is soft, influence factor is more etc., factor operation is difficult
Spend big, etc..
At present, reliable method also not for the dangerous monitoring of soft seam tunnel way of escape bump.
The content of the invention
The characteristics of purpose of the present invention is for current soft seam bump, after proposing a kind of reliable soft seam tunnel
Road bump danger monitoring method.
For reaching above-mentioned purpose, the present invention is adopted the technical scheme that：
A kind of soft seam tunnel way of escape bump danger monitoring method, step are as follows：
The first step：Determine tunnel way of escape deathtrap
In soft seam tunnelling, for the tunnel way of escape has pressure bump behavior region, rushed by analogy, adjacent stope
Press analysis, the judgement of presentation attributes with hitting, mark off the high stress areas in tunnel；
Second step：Monitoring anchor cable is installed in perforating
In tunnel, high stress areas make a call to an anchor cable eye at interval of 30-60m, more than perforating depth 10m, apart from base plate 1.5-
2.0m, then installs anchor cable in anchor cable eye, and during installation, anchor cable outer end should first put W steel band of model of the length of side more than 40cm, then cover
Upper ergometer, then installs pallet additional and is fastened with nut；When coal seam internal pressure increases, pulling force can be applied to anchor cable, so as in W
Pressure is presented between steel band of model and pallet, shows pressure change on ergometer；
3rd step：Dangerous determination methods
Real-time monitored records ergometer pressure changing, when being mutated occurs in coal seam inner pressure increase, illustrates that this is dashed forward
Becoming region has bump dangerous.
The positive effect of the present invention is：Due to the W steel band of model and the rib face contact area that adopt it is big, when coal seam internal pressure
When mutation occurs in increment, steel band change is obvious, has sensitivity, so can be according to the easy stress of soft seam for ergometer
The characteristics of mutation occurs in dilatation judges the shock hazard of the soft seam tunnel way of escape.
Description of the drawings
The enforcement of the present invention is illustrated below in conjunction with the accompanying drawings.
Fig. 1 is the anchor cable eye plane of arrangement figure of the embodiment of the present invention；
Fig. 2 is present invention monitoring anchor cable scheme of installation.
In figure：The 1- tunnels way of escape, 2- high stress areas, 3- anchor cable eyes, 4- anchor cables, 5-W steel band of model, 6- ergometers, 7- supports
Disk, 8- nuts.
Specific embodiment
As shown in Figure 1 and Figure 2, soft seam tunnel way of escape bump danger monitoring method step of the invention is as follows：
First, determine tunnel way of escape deathtrap
In soft seam tunnelling, for the tunnel way of escape 1 has pressure bump behavior region, by analogy, adjacent stope
The analysis of pressure bump behavior feature, judgement, mark off the high stress areas 2 in tunnel.
2nd, monitoring anchor cable is installed in perforating
In tunnel, high stress areas 2 make a call to an anchor cable eye 3, more than perforating depth b=10m, distance at interval of a=30-60m
Base plate 1.5-2.0m, then installs anchor cable 4 in anchor cable eye, and the length of side that 4 outer end of anchor cable first should be put with rigidity during installation is big
In the W steel band of model 5 of 40cm, then ergometer 6 is put, then install the nut of pallet 78 additional and fasten；When coal seam internal pressure increases,
Pulling force can be applied to anchor cable 4, so as to pressure is presented between W steel band of model 5 and pallet 7, show that pressure becomes on ergometer 6
Change.
3rd, dangerous determination methods
Real-time monitored records 6 pressure changing of ergometer, when being mutated occurs in coal seam inner pressure increase, illustrates that this is dashed forward
Becoming region has bump dangerous.
Claims (1)
1. a kind of soft seam tunnel way of escape bump danger monitoring method, it is characterised in that step is as follows：
The first step：Determine tunnel way of escape deathtrap
In soft seam tunnelling, for the tunnel way of escape has pressure bump behavior region, by analogy, adjacent stope impact ground
The analysis of pressure presentation attributes, judgement, mark off the high stress areas in tunnel；
Second step：Monitoring anchor cable is installed in perforating
In tunnel, high stress areas make a call to an anchor cable eye at interval of 30-60m, more than perforating depth 10m, apart from base plate 1.5-
2.0m, then installs anchor cable in anchor cable eye, and during installation, anchor cable outer end should first put W steel band of model of the length of side more than 40cm, then cover
Upper ergometer, then installs pallet additional and is fastened with nut；When coal seam internal pressure increases, pulling force can be applied to anchor cable, so as in W
Pressure is presented between steel band of model and pallet, shows pressure change on ergometer；
3rd step：Dangerous determination methods
Real-time monitored records ergometer pressure changing, when being mutated occurs in coal seam inner pressure increase, illustrates the saltation zone
Domain has bump dangerous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915666.9A CN106522950A (en) | 2016-10-20 | 2016-10-20 | Method for monitoring rock burst risk of soft coal roadway posterior |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610915666.9A CN106522950A (en) | 2016-10-20 | 2016-10-20 | Method for monitoring rock burst risk of soft coal roadway posterior |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106522950A true CN106522950A (en) | 2017-03-22 |
Family
ID=58332830
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610915666.9A Pending CN106522950A (en) | 2016-10-20 | 2016-10-20 | Method for monitoring rock burst risk of soft coal roadway posterior |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106522950A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556775A (en) * | 2018-11-08 | 2019-04-02 | 魏全德 | A method of monitoring bump risk |
| CN112483182A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of high-homogeneity coal seam by window intervention method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02153199A (en) * | 1988-12-06 | 1990-06-12 | Nisso Shoji Kk | Water-proof treatment of tunnel |
| CN102322267A (en) * | 2011-09-12 | 2012-01-18 | 山东科技大学 | Method for preventing and controlling rock burst in soft rock of deep well |
| CN103104294A (en) * | 2013-02-01 | 2013-05-15 | 湖南科技大学 | Rock burst prediction method |
| CN104632264A (en) * | 2015-01-15 | 2015-05-20 | 辽宁工程技术大学 | Underground coal mine fault activity anchor cable monitoring method |
-
2016
- 2016-10-20 CN CN201610915666.9A patent/CN106522950A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02153199A (en) * | 1988-12-06 | 1990-06-12 | Nisso Shoji Kk | Water-proof treatment of tunnel |
| CN102322267A (en) * | 2011-09-12 | 2012-01-18 | 山东科技大学 | Method for preventing and controlling rock burst in soft rock of deep well |
| CN103104294A (en) * | 2013-02-01 | 2013-05-15 | 湖南科技大学 | Rock burst prediction method |
| CN104632264A (en) * | 2015-01-15 | 2015-05-20 | 辽宁工程技术大学 | Underground coal mine fault activity anchor cable monitoring method |
Non-Patent Citations (1)
| Title |
|---|
| 曹业永等: "4401 工作面巷道冲击地压检测方法研究", <<山东煤炭科技>> * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109556775A (en) * | 2018-11-08 | 2019-04-02 | 魏全德 | A method of monitoring bump risk |
| CN112483182A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | Method for judging impact risk of high-homogeneity coal seam by window intervention method |
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| C06 | 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 |
Application publication date: 20170322 |
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| RJ01 | Rejection of invention patent application after publication |