CN103242024A - Leopoldite goaf cementation filler and filling method thereof - Google Patents
Leopoldite goaf cementation filler and filling method thereof Download PDFInfo
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- CN103242024A CN103242024A CN2012100229721A CN201210022972A CN103242024A CN 103242024 A CN103242024 A CN 103242024A CN 2012100229721 A CN2012100229721 A CN 2012100229721A CN 201210022972 A CN201210022972 A CN 201210022972A CN 103242024 A CN103242024 A CN 103242024A
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Abstract
The invention discloses a leopoldite goaf cementation filler. The filler comprises 30-100 parts by weight of high-magnesium lime, 10-20 parts by weight of gypsum, 250-350 parts by weight of aged brine, 900-1200 parts by weight of floatation salt, and 0.1-0.3 parts by weight of a water reducer. The invention also discloses a filling method of the leopoldite goaf cementation filler. The method comprises the following steps: preliminarily stirring the floatation salt, the water reducing and the aged brine; carrying out activation stirring to obtain a salt slurry; pressurizing the uniformly stirred salt slurry, and conveying the pressurized salt slurry to the inside of each of the stirrers of the movable work vehicles in all underground filling stopes; conveying cementation powder composted of the high-magnesium lime and gypsum to the inside of the stirrers through a pneumatic mode, and rapidly stirring and mixing the cementation powder and the salt slurry to obtain the cementation filler to leopoldite goaves for carrying out the material distribution filling work. The leopoldite goaf cementation filler has the advantages of no addition of clear water, no influences on the halite ore body, and solving of no filling or collapse danger existing after filling of a traditional method when the leopoldite goaf cementation filler is adopted to fill the leopoldite goaves.
Description
Technical field
The present invention relates to a kind of filling in mine material and placement method, relate in particular to a kind of potash salt ore goaf cemented filling material and placement method.
Background technology
Filling in mine is for the needs that satisfy mining industry grow up, and the history in more than 100 year has been arranged, and China has carried out the filling in mine practice since the 1950's.The filling in mine technology has experienced the evolution from non-consolidated fill to consolidated fill, and China's coal mines generally adopts lotion (or class lotion) packing technique at present.
The paste body filling technology originates from the plumbous zinc ore of Ahmedabad Ge Longde that German Pu Lusage metal company is positioned at area, Thuringia Godzilla in phase early 1980s.Under the help of German concrete pump manufacturers-Putzmeister Inc., utilize the separating coarse-grained barren rock of dressing-works flotation tailings and dense medium, design a kind of pumpable paste body filling material mixture ratio, and utilizing continuous band horizontal vacuum filter and two sections continuous mixerss of full hydraulic drive to prepare lotion, the all-hydraulic duplex piston pump of PM is delivered to the down-hole.
The operation of the plumbous zinc ore paste body filling of Ahmedabad Ge Longde system success 10 years, closed the hole up to 1992, the Pu Lusage metal company begins to whole world transfer and the service of providing advice.The paste body filling technology develops rapidly in countries such as the U.S., Canada, Australia and South Africa subsequently.Blue German side boat gold mine as the argentalium ore deposit on lucky Friday of the U.S., Canadian many nurses gold mine, Australian Kui and plumbous zinc ore and South Africa.
German mining and metallurgy technology company was applied to the colliery to the paste body filling technology first in 1991, and test site is the Waltham colliery, and working face is adopted dark 1000m, and thickness of coal seam 1.5m, used paste body filling material are spoil, flyash and broken rock dust.Material particular diameter is less than 5mm, and mass concentration has reached 76%～84%.The Hydraulic Double piston pump that the Waltham ore deposit uses Putzmeister Inc. to produce carries out pumping, operating pressure 25MPa, and maximum delivery is apart from 7km.When bashing, filling pipeline is arranged between transfer roller and the hydraulic support along the rib direction, connects a cloth tube every certain distance and is deep into and carries out filling in the worked-out section about 20m, and the filling pipeline follows working face equipment closely and advances and move forward.
Material processed, batch mixing, conveying and the stowing operation of paste body filling material are to finish under the help of filling system, and in general, the paste body filling system is made up of surface facility (plant and equipment and instrument etc.) and down-hole pipe network.The configuration of filling system can be divided into decentralized configuration and centralized configuration two big classes.Centralized configuration is convenient to centralized management, can reduce the post operation personnel, minimizing equipment, thereby reduction expense.Therefore, as long as conditions permit will adopt the centralized configuration scheme as far as possible.
Paste body filling material other compaction material relatively has its unique characteristics, at first is that the paste body filling concentration of material generally wants high with respect to the concentration of other compaction material, has generally reached 76%～84%; Next is that slip in the paste body filling material does not precipitate substantially, do not emanate, bleeding not, and these characteristics make compaction material become simply at the water-freeing arrangement of working face, has also reduced simultaneously because of draining and has taken away a large amount of solid particulates; The flow state of paste body filling material is plug flow simultaneously, and the slurry on the filling pipeline cross section is basically with identical flow rate; The rate of compression of paste body filling material is extremely low, mainly is owing to the space between the solid particulate in the paste body filling material is full of by consolidating material and water, and general rate of compression has only about 1%, and this has good effect for control face of land mining subsidence.
The goaf filling technology is divided into underground filling and ground filling:
The underground filling method mainly is divided into 4 kinds, namely from slipping filling, mechanical filling, pneumatic filling and hydraulic stowing.Can only satisfy in the steeply pitching seam and use from slipping filling, Huainan, Beijing, Beipiao City and in Mining Group such as Liangshan once used this stowing method.The used equipment of mechanical filling is simple, and to compaction material with require not strictly, but stowing capacity is low.Than higher, the scope of application is less to the requirement of system, equipment and casting resin for pneumatic filling.
The ground filling comprise from ground directly to goaf filling and by ground to the rock stratum inner grouting in separated bed.Wherein, directly to goaf filling, content relates to filling process, filling opportunity, the intensity of filling form and obturator etc. from ground; The inner absciss layer slip casting control of overlying strata subsidence technology is a kind of new strata control technological approaches, and its engineering practice relates generally to the planimetric position of grouting hole and the selection of the degree of depth, construction, slip casting station and grouting process design, Grouting engineering quality control, injecting paste material proportioning, the distribution of obturator and the lasting stability of obturator etc. of grouting hole.
When the filling mining technology is implemented in the mine at present, three kinds of filling process have mainly been adopted, i.e. mine tailing backfill, paste body filling and high density filling.
The mine tailing backfill is by the filling well ground mine tailing to be transported to working face, carries out goaf filling, because the mine tailing backfill belongs to dry filling, the rate of compression of its obturator is bigger, the final surface deformable that produces is bigger, the occasion that control is had relatively high expectations to subsidence, and this method is not too suitable.
The formed obturator quality of paste body filling height, subsidence control is effective.But the control of paste body filling slip quality and conveying be difficulty comparatively, and the plugging event often takes place, and stability and the reliability of system works are relatively poor, and facility investment is higher, so adopt the mine of paste body filling technology less relatively in the world.
The high density filling is compared with paste body filling, though the obturator quality is poor slightly, owing to high density filling slurry good fluidity, more is conducive to filling and connects the top, thereby subsidence control effect is more satisfactory equally.
Above-mentioned paste body filling only is used for insoluble solid mineral products mine worked-out section, and the filling lotion is not cured processing, and its ultimate compression strength is very weak.The a large amount of bleeding of filling lotion brings great harm to the solids production in solubility halite ore deposit, and mining can't be carried out.
Summary of the invention
Purpose of the present invention provides a kind of potash salt ore goaf cemented filling material and placement method with regard to being in order to address the above problem.
In order to achieve the above object, the present invention has adopted following technical scheme:
Potash salt ore goaf cemented filling material of the present invention comprises each raw material of following mass parts: high magnesium lime 30-100 part, gypsum 10-20 part, old bittern 250-350 part, tail salt 900-1200 part, water reducer 0.1-0.3 part.
Further, the mass parts of described each raw material is: high magnesium lime 30-90 part, gypsum 12-18 part, old bittern 260-335 part, tail salt 1000-1100 part, water reducer 0.15-0.25 part.
More specifically, the mass parts of described each raw material is: 90 parts of high magnesium limes, 15 parts in gypsum, 330 parts in old bittern, 1086 parts of tail salt, 0.2 part of water reducer.
The mass parts of described each raw material also can be 30 parts of high magnesium limes, 15 parts in gypsum, 267 parts in old bittern, 1086 parts of tail salt, 0.2 part of water reducer.
The mass parts of described each raw material can also be 60 parts of high magnesium limes, 13 parts in gypsum, 300 parts in old bittern, 1050 parts of tail salt, 0.18 part of water reducer.
As preferably, contain the calcium oxide that accounts for high magnesium lime gross weight 56.5% and the magnesium oxide that accounts for high magnesium lime gross weight 23.6% in the described high magnesium lime.
Described old bittern is the magnesium chloride saturated solution.
Described water reducer is sulfamate.
The placement method of potash salt ore goaf cemented filling material of the present invention may further comprise the steps:
(1) earlier tail salt, water reducer and old bittern are tentatively stirred with twin shaft blade stirrer;
(2) with the double-shaft spiral stirrer the preliminary tail salt that stirred, water reducer and old bittern are activated stirring again, obtain the salt slurry;
(3) salt that stirs slurry is transported to filling pipeline after the pressurization of high-pressure and hydraulic transferpump in the stirrer on the mobile operation car of each filling stope of down-hole;
(4) the rubber powder material that high magnesium lime and gypsum are formed adopts in the air conveying stirrer to the mobile operation car of each filling stope of down-hole, and with the stirrer of salt slurry on the mobile operation car in mix fast and obtain cemented filling material;
(5) adopt worm conveyor in the mobile operation vehicle that cemented filling material is delivered to potash salt ore goaf and carry out the cloth placement operation.
As optimal selection, in the cemented filling material of described (5) step, be delivered to potash salt ore goaf again behind the adding wilkinite; In the course of conveying, the flow velocity of cemented filling material is greater than its critical flow velocity, and the calculation formula of the critical flow velocity of described cemented filling material is:
In the formula: V is the critical flow velocity of cemented filling material, and unit is m/s; K is efflux coefficient, and value is 1.2-2; D is the overall dimension of cemented filling material particle, and unit is cm; Y is the weight of solid materials, and unit is kg;
The best value of above-mentioned each parameter is: K=1.8; D=0.236; Y=2.165;
Accordingly,
Beneficial effect of the present invention is:
Adopt cemented filling material filling potash salt ore goaf of the present invention, do not need to add clear water, therefore the water part in the old bittern enters solid with the form of crystal water, a part is saturated magnesium chloride solution in addition, under the situation of the satisfied both provisioning requests of compaction material bleeding rate, there is a small amount of old bittern to secrete, be the magnesium chloride saturated solution owing to secrete the water that, so the halite ore body is not had influence, does not have the problem of dissolving salt mine; The intensity of cemented filling material is that 0.5Mpa can meet the demands, and in the practice of construction, the ultimate compression strength of the cemented filling material of making can reach 2Mpa, can meet the demands fully, solved traditional casting resin and placement method can't the filling potash salt ore goaf or filling after the dangerous problem that collapses is arranged; Owing to utilized tail salt, stacked the problem of environmental pollution that produces on the face of land so the present invention has also solved tail salt; Behind the filling cemented filling material of the present invention, the rate of extraction of sylvite ore is risen to about 50% by 15-20%, and these all will produce huge social and economic benefit.
Embodiment
Below in conjunction with specific embodiment the present invention is further described in detail:
Embodiment 1:
Get each raw material for standby of following quality: high magnesium lime 90kg, gypsum 15kg, old bittern 330kg, tail salt 1086kg, water reducer 0.2kg.Contain the calcium oxide that accounts for high magnesium lime gross weight 56.5% and the magnesium oxide that accounts for high magnesium lime gross weight 23.6% in the high magnesium lime, gypsum adopts terra alba, old bittern adopts the magnesium chloride saturated solution, and the main component of tail salt is sodium-chlor, and water reducer adopts sulfamate.This cemented filling material ultimate compression strength height is high, is applicable to the potash salt ore goaf filling that environment is abominable.
Above-mentioned cemented filling material is carried out placement operation by the following method:
(1) earlier tail salt, water reducer and old bittern are tentatively stirred with twin shaft blade stirrer;
(2) with the double-shaft spiral stirrer the preliminary tail salt that stirred, water reducer and old bittern are activated stirring again, obtain the salt slurry;
(3) salt that stirs slurry is transported to filling pipeline after the pressurization of high-pressure and hydraulic transferpump in the stirrer on the mobile operation car of each filling stope of down-hole;
(4) the rubber powder material that high magnesium lime and gypsum are formed adopts in the air conveying stirrer to the mobile operation car of each filling stope of down-hole, and with the stirrer of salt slurry on the mobile operation car in mix fast and obtain cemented filling material;
(5) adopt worm conveyor in the mobile operation vehicle that cemented filling material is delivered to potash salt ore goaf and carry out the cloth placement operation.
In (5) step, in cemented filling material, be delivered to potash salt ore goaf again behind the adding wilkinite earlier; In the course of conveying, the flow velocity of cemented filling material is greater than 0.52m/s.Guaranteed that like this cemented filling material gets safe transport.
Embodiment 2:
Get each raw material for standby of following quality: high magnesium lime 30kg, gypsum 15kg, old bittern 267kg, tail salt 1086kg, water reducer 0.2kg.Contain the calcium oxide that accounts for high magnesium lime gross weight 56.5% and the magnesium oxide that accounts for high magnesium lime gross weight 23.6% in the high magnesium lime, gypsum adopts terra alba, old bittern adopts the magnesium chloride saturated solution, and the main component of tail salt is sodium-chlor, and water reducer adopts sulfamate.This cemented filling material ultimate compression strength height is lower, is applicable to environment potash salt ore goaf filling preferably.
Above-mentioned cemented filling material is carried out placement operation by the following method:
(1) earlier tail salt, water reducer and old bittern are tentatively stirred with twin shaft blade stirrer;
(2) with the double-shaft spiral stirrer the preliminary tail salt that stirred, water reducer and old bittern are activated stirring again, obtain the salt slurry;
(3) salt that stirs slurry is transported to filling pipeline after the pressurization of high-pressure and hydraulic transferpump in the stirrer on the mobile operation car of each filling stope of down-hole;
(4) the rubber powder material that high magnesium lime and gypsum are formed adopts in the air conveying stirrer to the mobile operation car of each filling stope of down-hole, and with the stirrer of salt slurry on the mobile operation car in mix fast and obtain cemented filling material;
(5) adopt worm conveyor in the mobile operation vehicle that cemented filling material is delivered to potash salt ore goaf and carry out the cloth placement operation.
In (5) step, in cemented filling material, be delivered to potash salt ore goaf again behind the adding wilkinite earlier; In the course of conveying, the flow velocity of cemented filling material is greater than 0.52m/s.Guaranteed that like this cemented filling material gets safe transport.
Embodiment 3:
Get each raw material for standby of following quality: high magnesium lime 60kg, gypsum 13kg, old bittern 300kg, tail salt 1050kg, water reducer 0.18kg.Contain the calcium oxide that accounts for high magnesium lime gross weight 56.5% and the magnesium oxide that accounts for high magnesium lime gross weight 23.6% in the high magnesium lime, gypsum adopts terra alba, old bittern adopts the magnesium chloride saturated solution, and the main component of tail salt is sodium-chlor, and water reducer adopts sulfamate.This cemented filling material ultimate compression strength height is moderate, is applicable to the potash salt ore goaf filling of general environment.
Above-mentioned cemented filling material is carried out placement operation by the following method:
(1) earlier tail salt, water reducer and old bittern are tentatively stirred with twin shaft blade stirrer;
(2) with the double-shaft spiral stirrer the preliminary tail salt that stirred, water reducer and old bittern are activated stirring again, obtain the salt slurry;
(3) salt that stirs slurry is transported to filling pipeline after the pressurization of high-pressure and hydraulic transferpump in the stirrer on the mobile operation car of each filling stope of down-hole;
(4) the rubber powder material that high magnesium lime and gypsum are formed adopts in the air conveying stirrer to the mobile operation car of each filling stope of down-hole, and with the stirrer of salt slurry on the mobile operation car in mix fast and obtain cemented filling material;
(5) adopt worm conveyor in the mobile operation vehicle that cemented filling material is delivered to potash salt ore goaf and carry out the cloth placement operation.
In (5) step, in cemented filling material, be delivered to potash salt ore goaf again behind the adding wilkinite earlier; In the course of conveying, the flow velocity of cemented filling material is greater than 0.52m/s.Guaranteed that like this cemented filling material gets safe transport.
Claims (10)
1. a potash salt ore goaf cemented filling material is characterized in that: each raw material that comprises following mass parts: high magnesium lime 30-100 part, gypsum 10-20 part, old bittern 250-350 part, tail salt 900-1200 part, water reducer 0.1-0.3 part.
2. potash salt ore goaf cemented filling material according to claim 1, it is characterized in that: the mass parts of described each raw material is: high magnesium lime 30-90 part, gypsum 12-18 part, old bittern 260-335 part, tail salt 1000-1100 part, water reducer 0.15-0.25 part.
3. potash salt ore goaf cemented filling material according to claim 2, it is characterized in that: the mass parts of described each raw material is: 90 parts of high magnesium limes, 15 parts in gypsum, 330 parts in old bittern, 1086 parts of tail salt, 0.2 part of water reducer.
4. potash salt ore goaf cemented filling material according to claim 2, it is characterized in that: the mass parts of described each raw material is: 30 parts of high magnesium limes, 15 parts in gypsum, 267 parts in old bittern, 1086 parts of tail salt, 0.2 part of water reducer.
5. potash salt ore goaf cemented filling material according to claim 2, it is characterized in that: the mass parts of described each raw material is: 60 parts of high magnesium limes, 13 parts in gypsum, 300 parts in old bittern, 1050 parts of tail salt, 0.18 part of water reducer.
6. according to the described potash salt ore goaf cemented filling material of any one claim among the claim 1-5, it is characterized in that: contain the calcium oxide that accounts for high magnesium lime gross weight 56.5% and the magnesium oxide that accounts for high magnesium lime gross weight 23.6% in the described high magnesium lime.
7. according to the described potash salt ore goaf cemented filling material of any one claim among the claim 1-5, it is characterized in that: described old bittern is the magnesium chloride saturated solution.
8. according to the described potash salt ore goaf cemented filling material of any one claim among the claim 1-5, it is characterized in that: described water reducer is sulfamate.
9. the placement method of a potash salt ore goaf cemented filling material as claimed in claim 1, its feature exists
In: may further comprise the steps:
(1) earlier tail salt, water reducer and old bittern are tentatively stirred with twin shaft blade stirrer;
(2) with the double-shaft spiral stirrer the preliminary tail salt that stirred, water reducer and old bittern are activated stirring again, obtain the salt slurry;
(3) salt that stirs slurry is transported to filling pipeline after the pressurization of high-pressure and hydraulic transferpump in the stirrer on the mobile operation car of each filling stope of down-hole;
(4) the rubber powder material that high magnesium lime and gypsum are formed adopts in the air conveying stirrer to the mobile operation car of each filling stope of down-hole, and with the stirrer of salt slurry on the mobile operation car in mix fast and obtain cemented filling material;
(5) adopt worm conveyor in the mobile operation vehicle that cemented filling material is delivered to potash salt ore goaf and carry out the cloth placement operation.
10. the placement method of potash salt ore goaf cemented filling material according to claim 9 is characterized in that: be delivered to potash salt ore goaf again add wilkinite in the cemented filling material of described (5) step after; In the course of conveying, the flow velocity of cemented filling material is greater than its critical flow velocity, and the calculation formula of the critical flow velocity of described cemented filling material is:
In the formula: V is the critical flow velocity of cemented filling material, and unit is m/s; K is efflux coefficient, and value is 1.2-2; D is the overall dimension of cemented filling material particle, and unit is cm; Y is the weight of solid materials, and unit is kg;
The best value of above-mentioned each parameter is: K=1.8; D=0.236; Y=2.165;
Accordingly,
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| CN2012100229721A CN103242024A (en) | 2012-02-02 | 2012-02-02 | Leopoldite goaf cementation filler and filling method thereof |
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| CN2012100229721A CN103242024A (en) | 2012-02-02 | 2012-02-02 | Leopoldite goaf cementation filler and filling method thereof |
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Cited By (6)
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| CN103470304A (en) * | 2013-09-17 | 2013-12-25 | 云南省化工研究院 | Method for recharging magnesium chloride mother solution into potash salt ore gob |
| CN104533339A (en) * | 2014-12-05 | 2015-04-22 | 新奥气化采煤有限公司 | Close method for underground coal gasification drill hole |
| CN104712359B (en) * | 2015-02-12 | 2016-10-12 | 化工部长沙设计研究院 | A kind of method preparing goaf backfill material with the sylvite ore potassium mine tailing containing magnesium |
| CN107365129A (en) * | 2017-09-01 | 2017-11-21 | 中农国际钾盐开发有限公司 | It is a kind of to utilize the method for being classified tail salt production sylvite ore cemented filling material |
| CN109538289A (en) * | 2018-12-05 | 2019-03-29 | 飞翼股份有限公司 | A kind of underground filling material and preparation method thereof suitable for pipeline |
| CN111535853A (en) * | 2020-05-18 | 2020-08-14 | 老挝开元矿业有限公司 | Improved formula of filling and backfilling process after mining of novel underground sylvite |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103470304A (en) * | 2013-09-17 | 2013-12-25 | 云南省化工研究院 | Method for recharging magnesium chloride mother solution into potash salt ore gob |
| CN104533339A (en) * | 2014-12-05 | 2015-04-22 | 新奥气化采煤有限公司 | Close method for underground coal gasification drill hole |
| CN104533339B (en) * | 2014-12-05 | 2018-06-12 | 新奥科技发展有限公司 | The enclosure method of underground coal gasification drill holes |
| CN104712359B (en) * | 2015-02-12 | 2016-10-12 | 化工部长沙设计研究院 | A kind of method preparing goaf backfill material with the sylvite ore potassium mine tailing containing magnesium |
| CN107365129A (en) * | 2017-09-01 | 2017-11-21 | 中农国际钾盐开发有限公司 | It is a kind of to utilize the method for being classified tail salt production sylvite ore cemented filling material |
| CN107365129B (en) * | 2017-09-01 | 2020-06-19 | 中农国际钾盐开发有限公司 | Method for producing sylvite cemented filling material by using graded tail salt |
| CN109538289A (en) * | 2018-12-05 | 2019-03-29 | 飞翼股份有限公司 | A kind of underground filling material and preparation method thereof suitable for pipeline |
| CN111535853A (en) * | 2020-05-18 | 2020-08-14 | 老挝开元矿业有限公司 | Improved formula of filling and backfilling process after mining of novel underground sylvite |
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Application publication date: 20130814 |