CN108729917A - The method for preventing bump - Google Patents
The method for preventing bump Download PDFInfo
- Publication number
- CN108729917A CN108729917A CN201810531944.XA CN201810531944A CN108729917A CN 108729917 A CN108729917 A CN 108729917A CN 201810531944 A CN201810531944 A CN 201810531944A CN 108729917 A CN108729917 A CN 108729917A
- Authority
- CN
- China
- Prior art keywords
- pressure
- grouting
- earth
- working face
- opened
- 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
- 238000000034 method Methods 0.000 title claims abstract description 17
- 239000010883 coal ash Substances 0.000 claims abstract description 23
- 239000011435 rock Substances 0.000 claims abstract description 17
- 230000002265 prevention Effects 0.000 claims abstract description 15
- 238000003825 pressing Methods 0.000 claims abstract description 10
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 230000000737 periodic effect Effects 0.000 claims description 4
- 239000002002 slurry Substances 0.000 claims description 3
- 239000002562 thickening agent Substances 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 abstract description 8
- 239000003245 coal Substances 0.000 abstract description 3
- 239000004570 mortar (masonry) Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 239000011440 grout Substances 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 229920002472 Starch Polymers 0.000 description 2
- 235000019698 starch Nutrition 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK 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
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Remote Sensing (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The present invention relates to coal mine impact low pressure prevention and control fields, provide a kind of method of prevention bump.This approach includes the following steps：Thief hole is opened up in earth's surface；Each rock stratum is sampled by thief hole, to obtain the layer position information of each key stratum；Direction of propulsion along working face is mined；Before pressing, the injected hole for extending to grouting horizon is opened up in earth's surface in working face generating period；Wherein, grouting horizon is the inferior key strata for closing on top plate and layer position where absciss layer between soft layer below；The coal ash pulp being pre-mixed is injected by injected hole high pressure in the corresponding absciss layer of grouting horizon using high-pressure pump.The present invention by working face generating period come before pressing, injected hole, which is opened up, in earth's surface carries out high-pressure slip-casting, so that top plate under the action of high-pressure powdered coal mortar and rock stratum weight stress with adopt with note with inbreak, and then it ensure that the fracture energy of top plate obtains timely, effective release, the risk factor for reducing bump, avoids stress concentration.
Description
Technical field
The present invention relates to coal mine impact low pressure prevention and control fields, and in particular to a method of prevention bump.
Background technology
Currently, during China's coal-mine is mined, the outstanding top of the tight roof large area that mostly occurs leads to periodic weighting unobvious
The phenomenon that.When the advance distance of working face reaches certain value, the span of the outstanding dew of top plate just has reached its limit broken mechanics.This
When, tight roof is easily under the collective effect of its own gravity and overburden pressure, unexpected occurrence of large-area fracture, to lead
Stope caving zone rock stratum strenuous exercise is caused, impact low pressure is generated, greatly threatens the safety in production of mine.
Invention content
The object of the present invention is to provide a kind of methods of prevention bump, real to avoid the unexpected large area fracture of top plate
Now with adopt with note with inbreak.
In order to achieve the above objectives, the present invention provides a kind of method of prevention bump, this approach includes the following steps：
Thief hole is opened up in earth's surface；
Each rock stratum is sampled by the thief hole, to obtain the layer position information of each key stratum；
Direction of propulsion along working face is mined；
Before pressing, the injected hole for extending to grouting horizon is opened up in earth's surface in working face generating period；Wherein, the note
Pulp layer position is the inferior key strata for closing on top plate and layer position where absciss layer between soft layer below；
Using high-pressure pump by the coal ash pulp being pre-mixed by the injected hole inject the grouting horizon it is corresponding from
In layer.
Wherein, described that the injected hole for extending to grouting horizon before pressing, is opened up in earth's surface in working face generating period, have
Body is to be opened up in earth's surface when the advance distance of the working face is equal to 0.5~1 periodic weighting step pitch and extend to grouting horizon
Injected hole.
Wherein, flyash a concentration of 70%~75% in the coal ash pulp.
Wherein, additive is added in the coal ash pulp.
Wherein, the additive includes antifreezing agent, accelerator, retarder and/or thickener.
Wherein, the high pressure slurry pump is variable frequency pump.
Wherein, the grouting pressure of the high-pressure pump is not less than the pressure of the grouting horizon overlying rock.
Of low cost, simple operation of the invention, is sampled each rock stratum by using thief hole, so that it may determine each
The layer position information of key stratum；Then, according to the layer position information of each key stratum, in working face generating period come before pressing, on ground
Table opens up injected hole, and it is made to extend to the inferior key strata for closing on top plate and the below absciss layer between soft layer；Then, pass through
After the coal ash pulp being pre-mixed is injected the injected hole by high-pressure pump, so that it may utilize its own gravity of these coal ash pulps, fluid
Pressure and formation subsidence movement collective effect top plate is broken in time, make original top plate reach capacity span when be broken suddenly
Become with adopt with note with inbreak.To not only ensure that the fracture energy of top plate obtains timely, effective release, reduce impact
The risk factor of ground pressure, and high-pressure slip-casting changes ground movement rule, so that the unexpected inbreak of top plate is become continuous uniform soft
Property sink, so as to avoid stress concentration.It is supported in addition, these coal ash pulps can also be formed grouting horizon overlying rock, limit
It makes it and movement and deformation occurs.Also, in whole process only need to the slip casting in specified absciss layer, therefore coal ash pulp is greatly reduced
Dosage, thereby reduce cost, shorten final setting time, avoid the loss of moisture and running pulp in coal ash pulp, grout leaking and
The generation of grout phenomenon.
Description of the drawings
Fig. 1 is the sectional view of the preceding bank of slip casting in the embodiment of the present invention；
Fig. 2 is the sectional view of bank after slip casting in the embodiment of the present invention.
Reference numeral：
1, inferior key strata；2, soft layer；3, grouting horizon；4, top plate；5, injected hole；6, coal ash pulp；7, compacting zone.
Specific implementation mode
To keep the purpose, technical scheme and advantage of invention clearer, below in conjunction with the attached drawing in invention, in invention
Technical solution be explicitly described, it is clear that described embodiment is invention a part of the embodiment, rather than whole realities
Apply example.It is obtained by those of ordinary skill in the art without making creative efforts based on the embodiment in invention
Every other embodiment belongs to the range of invention protection.
In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or more.Term "upper",
The orientation or positional relationship of the instructions such as "lower" is to be based on the orientation or positional relationship shown in the drawings, and is merely for convenience of describing this hair
Bright and simplified description, does not indicate or imply the indicated device or element must have a particular orientation, with specific orientation
Construction and operation, therefore be not considered as limiting the invention.
As depicted in figs. 1 and 2, it is provided in an embodiment of the present invention it is a kind of prevention bump method, this method include with
Lower step：
Thief hole is opened up in earth's surface；
Each rock stratum is sampled by thief hole, to obtain the layer position information of each key stratum；
Direction of propulsion along working face is mined；
Before pressing, the injected hole 5 for extending to grouting horizon 3 is opened up in earth's surface in working face generating period；Wherein, slip casting
Layer position 3 be the inferior key strata 1 for closing on top plate 4 and the absciss layer place layer position between soft layer 2 below；
The coal ash pulp 6 being pre-mixed is injected by injected hole 5 in 3 corresponding absciss layer of grouting horizon using high-pressure pump.
Since working face generating period is come before pressing, the span of the outstanding dew of top plate 4 also reaches far away its limit broken mechanics, and work people at this time
Member has the sufficient time to open up injected hole 5, and the coal ash pulp 6 being pre-mixed is passed through note with certain high pressure immediately after completing trepanning
It starches hole 5 to inject in the absciss layer near top plate 4, as coal ash pulp 6 is on the increase in absciss layer, top plate 4 is just in these flyash
It starches and fracture in time occurs under the collective effect of 6 its own gravities, Fluid pressure and formation subsidence movement.
As it can be seen that the present invention is sampled each rock stratum by using thief hole, so that it may determine the layer position of each key stratum
Information；Then, according to the layer position information of each key stratum, so that it may before pressing, note is opened up in earth's surface in working face generating period
Hole 5 is starched, and it is made to extend to the inferior key strata 1 for closing on top plate 4 and the below absciss layer between soft layer 2；Then, pass through high pressure
After the coal ash pulp 6 being pre-mixed is injected the injected hole 5 by pump, so that it may utilize its own gravity, the fluid pressure of these coal ash pulps 6
Power and formation subsidence movement collective effect top plate 4 is broken in time, make original top plate 4 reach capacity span when be broken suddenly
Become with adopt with note with inbreak.To not only ensure that the fracture energy of top plate 4 obtains timely, effective release, reduce punching
The risk factor pressed with hitting, and high-pressure slip-casting changes ground movement rule, and the unexpected inbreak of top plate 4 is made to become continuous uniform
Flexibility is sunk, so as to avoid stress concentration.In addition, can also be to overlying strata on grouting horizon 3 after the solidification compacting of these coal ash pulps 6
Layer forms support, limits it and movement and deformation occurs.Also, in whole process only need to the slip casting in specified absciss layer, therefore substantially
The dosage for reducing coal ash pulp 6, thereby reduces cost, shortens final setting time, avoids the stream of moisture in coal ash pulp 6
The generation for the running pulp, grout leaking and grout phenomenon of becoming estranged.
Preferably, the injected hole 5 for extending to grouting horizon 3 before pressing, is opened up in earth's surface in working face generating period, have
Body is to be opened up in earth's surface when the advance distance of working face is equal to 0.5~1 periodic weighting step pitch and extend to grouting horizon 3
Injected hole 5.
Preferably, flyash a concentration of 70%~75% in coal ash pulp 6.It further, in actual use, can be according to existing
The developmental state of field weather and rock crack, adds additive, such as antifreezing agent, accelerator, retarder in coal ash pulp 6
And/or thickener.
Preferably, high pressure slurry pump is variable frequency pump, to adjust grouting pressure at any time according to the deformation of rock stratum,
In, grouting pressure is not less than the pressure of 3 overlying rock of grouting horizon, that is to say, that grouting pressure is equal or slightly larger than grouting layer
The pressure of 3 overlying rocks of position.The advantages of this arrangement are as follows after being adopted using the rapid prevention of higher grouting pressure and cut-out
Each rock stratum unstability ensures that 3 overlying rock of grouting horizon keeps stablizing.
Finally it should be noted that：Above example is only to illustrate the technical solution of invention, rather than its limitations；Although ginseng
Invention is described in detail according to previous embodiment, it will be understood by those of ordinary skill in the art that：It still can be right
Technical solution recorded in foregoing embodiments is modified or equivalent replacement of some of the technical features；And this
A little modification or replacements, the spirit and scope for each embodiment technical solution of invention that it does not separate the essence of the corresponding technical solution.
Claims (7)
1. a kind of method of prevention bump, which is characterized in that include the following steps：
Thief hole is opened up in earth's surface；
Each rock stratum is sampled by the thief hole, to obtain the layer position information of each key stratum；
Direction of propulsion along working face is mined；
Before pressing, the injected hole for extending to grouting horizon is opened up in earth's surface in working face generating period；Wherein, the grouting layer
Position is the inferior key strata for closing on top plate and layer position where absciss layer between soft layer below；
The coal ash pulp being pre-mixed is injected by the injected hole in the corresponding absciss layer of the grouting horizon using high-pressure pump.
2. the method for prevention bump according to claim 1, which is characterized in that described to come in working face generating period
Before pressure, the injected hole for extending to grouting horizon is opened up in earth's surface, specially the advance distance of the working face be equal to 0.5~
When 1 periodic weighting step pitch, the injected hole for extending to grouting horizon is opened up in earth's surface.
3. the method for prevention bump according to claim 1, which is characterized in that flyash is dense in the coal ash pulp
Degree is 70%~75%.
4. the method for prevention bump according to claim 1, which is characterized in that add in the coal ash pulp
Add agent.
5. it is according to claim 4 prevention bump method, which is characterized in that the additive include antifreezing agent,
Accelerator, retarder and/or thickener.
6. the method for prevention bump according to claim 1, which is characterized in that the high pressure slurry pump is frequency conversion
Pump.
7. the method for prevention bump according to any one of claims 1 to 6, which is characterized in that the high-pressure pump
Grouting pressure is not less than the pressure of the grouting horizon overlying rock.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531944.XA CN108729917B (en) | 2018-05-29 | 2018-05-29 | Method for preventing rock burst |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810531944.XA CN108729917B (en) | 2018-05-29 | 2018-05-29 | Method for preventing rock burst |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108729917A true CN108729917A (en) | 2018-11-02 |
| CN108729917B CN108729917B (en) | 2020-04-03 |
Family
ID=63936646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810531944.XA Active CN108729917B (en) | 2018-05-29 | 2018-05-29 | Method for preventing rock burst |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108729917B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483089A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | One-movement multi-static protection method for working face lateral suspended roof type rock burst |
| CN114673499A (en) * | 2022-03-18 | 2022-06-28 | 中煤地生态环境科技有限公司 | Method for preventing rock burst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201461291U (en) * | 2009-07-27 | 2010-05-12 | 河南省煤层气开发利用有限公司 | Underground fracturing plunger pump unit in coal mine |
| CN101705838A (en) * | 2009-11-05 | 2010-05-12 | 冀中能源邯郸矿业集团有限公司 | Separate type filling method of goaf |
| CN102220866A (en) * | 2011-04-17 | 2011-10-19 | 山东科技大学 | Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift |
| CN104863629A (en) * | 2015-06-11 | 2015-08-26 | 中国矿业大学 | Method for extracting gas from separation layer below overlying strata, draining water and grouting through combined drill hole |
-
2018
- 2018-05-29 CN CN201810531944.XA patent/CN108729917B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201461291U (en) * | 2009-07-27 | 2010-05-12 | 河南省煤层气开发利用有限公司 | Underground fracturing plunger pump unit in coal mine |
| CN101705838A (en) * | 2009-11-05 | 2010-05-12 | 冀中能源邯郸矿业集团有限公司 | Separate type filling method of goaf |
| CN102220866A (en) * | 2011-04-17 | 2011-10-19 | 山东科技大学 | Pressure relief and consolidation synergizing prevention and control method for rock burst in deep coal drift |
| CN104863629A (en) * | 2015-06-11 | 2015-08-26 | 中国矿业大学 | Method for extracting gas from separation layer below overlying strata, draining water and grouting through combined drill hole |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112483089A (en) * | 2020-12-18 | 2021-03-12 | 山东科技大学 | One-movement multi-static protection method for working face lateral suspended roof type rock burst |
| CN114673499A (en) * | 2022-03-18 | 2022-06-28 | 中煤地生态环境科技有限公司 | Method for preventing rock burst |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108729917B (en) | 2020-04-03 |
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