CN102276221A - Dynamic gangue concrete filled beside gob-side entry retaining - Google Patents
Dynamic gangue concrete filled beside gob-side entry retaining Download PDFInfo
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- CN102276221A CN102276221A CN2011101546090A CN201110154609A CN102276221A CN 102276221 A CN102276221 A CN 102276221A CN 2011101546090 A CN2011101546090 A CN 2011101546090A CN 201110154609 A CN201110154609 A CN 201110154609A CN 102276221 A CN102276221 A CN 102276221A
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- parts
- gob
- side entry
- entry retaining
- concrete
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention discloses a dynamic gangue concrete filled beside gob-side entry retainings. The concrete is prepared from materials of, by weight: 1000 parts of gangue with particle sizes smaller than 1.5cm, 200 parts of ordinary Portland cement, 100 parts of power plant fly ash, 3 parts of a hydration agent, 2 parts of an internal curing agent, 50 parts of an alkali-free liquid accelerator, and 500 parts of water. The materials are uniformly mixed by stirring. Uniaxial compressive strength of supporting structures formed by the concrete provided by the invention is 6 to 9Mpa in one day. Uniaxial compressive strength of the supporting structures in a 28-day curing age is 16 to 24Mpa. Therefore, the gangue concrete provided by the invention satisfies a supporting requirement of gob-side entry retaining.
Description
Technical field
The present invention relates to a kind of concrete, being particularly useful for the colliery does not have coal pillar mining-gob-side entry retaining roadside packing power gangue concrete.
Background technology
After the coal mining working face was adopted, former working face upper curtate (or lower curtate) tunnel is remained, use when adjacent working face mining, the tunnel of staying is called gob-side entry retaining.After exploiting field upper curtate working face is adopted, in the time of can be along the empty institute tunnel of staying for the lower curtate working face extraction as return airway.
Gob-side entry is positioned at the edge, worked-out section, and the mining influence of experience upper curtate working face must have roadside support by worked-out section side during the reservation tunnel.Thereby the supporting in the gob-side entry also will have roadside support except that the basic supporting in tunnel with enter the adding the strong supporting of mining influence district temporarily in gob-side entry retaining.Traditional roadside support has: modes such as crib protection, close-standing props supporting, waste pack supporting, concrete segment supporting, integrated poured roadside packing supporting, wherein crib protection, the main drawback of close-standing props supporting, waste pack supporting is, increases that resistance speed is slow, supporting capacity is low, poor sealing performance, lumber consumption is many and mechanization degree is not high; Concrete segment supporting workman labor capacity is big, and efficient is low, stays lane speed not catch up with the quick coal cutting progress of mechanize; Integrated poured roadside packing technology be have that the resistance of increasing speed is fast, bearing value is big, good seal performance and mechanization degree advantages of higher, compaction material mostly is like lotion, concrete, high-water material etc., composition generally comprises stone, cement, sand and additive, must set up feed proportioning system, transportation and pumping filling system on ground, the cost height, investment is big, system complex.
In addition, (spoil output is about 10% of coal production, and the annual spoil that newly produces and be deposited in the face of land is about 1.5-3 hundred million m will to get rid of a large amount of spoils in the tunneling process of coal cutting roadway
3), spoil drains into ground and throws aside, often is piled into waste dump in the colliery, takies tract, is both to produce various toxic and harmfuls, and pollutant atmosphere also easily produces various geologic hazards such as slump in rainy season.If allow spoil not go out well, refuse carries out the down-hole and utilizes, and not only environmental protection can also produce economic benefit.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned roadside packing technology, invent a kind of gob-side entry retaining roadside packing power gangue concrete.
For achieving the above object, technical scheme of the present invention is: get the particle diameter pulverized the down-hole less than 3 parts of 100 parts of 200 parts of 1000 parts of spoils, ordinary Portland cements, fly ash in electric power plant, the hydrated agents of 1.5cm, 2 parts of interior curing agents, 50 parts of alkali-free liquid accelerators, add 500 parts in water and stir.
Above-mentioned umber all refers to parts by weight.
Above-mentioned spoil is got the spoil of the particle diameter of down-hole pulverizing less than 1.5cm
Above-mentioned each raw material umber can add and subtract 10% on former umber basis.
Curing agent, hydrated agent and alkali-free liquid accelerator are the commercially available prod in above-mentioned.
The interior curing agent of the WMEYCOTCC735 that curing agent preferentially selects for use BASF chemical building material (China) company limited to produce in above-mentioned.
Above-mentioned alkali-free liquid accelerator is preferentially selected the accelerating chemicals of the SA160 model of BASF chemical building material (China) company limited production for use
During enforcement, spoil directly is transported to downhole crushed chamber through rotary conveyor after the down-hole excavates, be crushed to particle diameter less than 1.5cm after, be transported to the stirrer of filling operation face through rotary conveyor; With a kind of gob-side entry retaining roadside packing material of formation behind other interpolation material premixings, be transported to gob-side entry retaining roadside packing space through concrete pump again, solidify the back and form stable roadside support body.
After testing, 1 day the uniaxial compressive strength of prop that concrete of the present invention forms is 6-9Mpa, and the uniaxial compressive strength in the 28 day length of time is 16-24Mpa, can satisfy the requirement of gob-side entry retaining roadside support fully.
The positively effect of gob-side entry retaining roadside packing concrete material of the present invention is:
1, have high workability, need not to vibrate, can carry horizontal throw to reach 800m and can blocking pipeline, adapt to coal cutting roadway length apart from delivering concrete;
2, do not have bubble, intensity evenly, be fit to build and can accelerate the process of building, concrete structure durability is stronger, meets power concrete feature, and is more superior than the self-compacting concrete performance;
3, the interior curing agent of Shi Yonging can effectively improve the about 30-40% of cohesive strength of gangue concrete, density improves 15%, concrete contraction and cracking reduce, improve final ultimate compression strength, be applicable to the pumping of lower intensity level concrete, solved concrete and be difficult to carry out the difficult problem that outer maintenance, cohesive strength low, final ultimate compression strength are low, be difficult to pumping.
4, cost is only about the 1/3-2/3 for existing compaction material cost.
5, most of raw material is a downhole gangue, economizes on resources, realizes the utilization of waste material in colliery, has realized exploration without waster.
Embodiment
A kind of gob-side entry retaining roadside packing is as follows with power gangue concrete preparation method:
1, at first get downhole gangue and directly be transported to downhole crushed chamber through rotary conveyor, broken back forms the spoil of particle diameter less than 1.5cm, as the aggregate of making the power gangue concrete;
2, the downhole gangue after the fragmentation is transported to stirrer through rotary conveyor, add 200 parts of ordinary Portland cements, 100 parts of fly ash in electric power plant, 3 parts of hydrated agents, 2 parts of interior curing agents, 50 parts of alkali-free liquid accelerators in 1000 parts of spoils, add 500 parts in water again and stir.
Above-mentioned each raw material umber can add and subtract 10% on former umber basis.
Claims (4)
1. gob-side entry retaining roadside packing power gangue concrete, it is characterized in that it is evenly to be mixed for 500 parts less than 3 parts of 100 parts of 200 parts of 1000 parts of spoils, ordinary Portland cements, fly ash in electric power plant, the hydrated agents of 1.5cm, 2 parts of interior curing agents, 50 parts of alkali-free liquid accelerators and water by particle diameter to form;
Above-mentioned umber all refers to parts by weight.
2. gob-side entry retaining roadside packing power gangue concrete as claimed in claim 1 is characterized in that, described spoil refers to the spoil of pulverizing in the down-hole.
3. gob-side entry retaining roadside packing power gangue concrete as claimed in claim 1 or 2 is characterized in that, the interior curing agent of WMEYCO TCC735 model that described interior curing agent selects for use BASF chemical building material company limited to produce.
4. gob-side entry retaining roadside packing power gangue concrete as claimed in claim 1 or 2 is characterized in that, the SA160 model accelerating chemicals that described alkali-free liquid accelerator selects for use BASF chemical building material company limited to produce.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101546090A CN102276221A (en) | 2011-05-27 | 2011-05-27 | Dynamic gangue concrete filled beside gob-side entry retaining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101546090A CN102276221A (en) | 2011-05-27 | 2011-05-27 | Dynamic gangue concrete filled beside gob-side entry retaining |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102276221A true CN102276221A (en) | 2011-12-14 |
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ID=45102018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101546090A Pending CN102276221A (en) | 2011-05-27 | 2011-05-27 | Dynamic gangue concrete filled beside gob-side entry retaining |
Country Status (1)
| Country | Link |
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| CN (1) | CN102276221A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110718A (en) * | 2015-07-21 | 2015-12-02 | 山西商溢通建材科技有限公司 | High fly ash and coal gangue dry mixed guniting material for underground anchor net support |
| CN107902996A (en) * | 2017-11-28 | 2018-04-13 | 王德元 | A kind of fast hard interior maintenance mortar |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962524A (en) * | 2006-11-24 | 2007-05-16 | 张洪伟 | Cement calcine-free quick coagulator and its production process |
-
2011
- 2011-05-27 CN CN2011101546090A patent/CN102276221A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1962524A (en) * | 2006-11-24 | 2007-05-16 | 张洪伟 | Cement calcine-free quick coagulator and its production process |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105110718A (en) * | 2015-07-21 | 2015-12-02 | 山西商溢通建材科技有限公司 | High fly ash and coal gangue dry mixed guniting material for underground anchor net support |
| CN107902996A (en) * | 2017-11-28 | 2018-04-13 | 王德元 | A kind of fast hard interior maintenance mortar |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20111214 |