CN102515683A - Filling paste prepared from salt deposit exploitation tail salt and consolidated filling method thereof - Google Patents

Filling paste prepared from salt deposit exploitation tail salt and consolidated filling method thereof Download PDF

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CN102515683A
CN102515683A CN201110420167XA CN201110420167A CN102515683A CN 102515683 A CN102515683 A CN 102515683A CN 201110420167X A CN201110420167X A CN 201110420167XA CN 201110420167 A CN201110420167 A CN 201110420167A CN 102515683 A CN102515683 A CN 102515683A
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filling
nacl
mgcl
salt
lotion
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CN102515683B (en
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张春方
黄振伟
牛明远
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Bluestar Lehigh Engineering Institute
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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

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Abstract

The invention discloses filling paste prepared from salt deposit exploitation tail salt. The filling paste is characterized in that: tail salt prepared by performing ore dressing processing on sylvite or carnallite ore is taken as a filling substrate; the filling substrate mainly comprises NaCl and MgCl2, and hemihydrate gypsum CaSO4 1/2H2O is taken as a cementing material; NaCl serving as an aggregate for solidifying the filling substrate is added as required, and the concentration of a filling material is adjusted by controlling the adding amount of NaCl; and paste of which the mass concentration is 81-88 percent is formed by mixing and stirring the filling substrate with the cementing material. The invention further discloses a filling method for using the filling paste. High-concentration paste is prepared by using the tail salt and the cementing material, the paste filling material is solidified through a physical-chemical reaction after being pumped to an underground worked out section, and a filling body with certain strength can be formed without dehydration in a stope. Softening damage to ore columns and wall rock caused by water contained in filling slurry is avoided, and the ecological environments on the ground surface and the periphery of a mining area are protected effectively.

Description

Utilize the filling lotion of salt deposit exploitation tail salt and the method for consolidated fill thereof
Technical field
The present invention relates to a kind of compaction material and method of mineral deposit, particularly a kind of filling lotion that utilizes salt deposit exploitation tail salt, this filling lotion are specially adapted to filling is carried out in the worked-out section that sylvite or carnallite deposit adopt the underground mining mode to form; The invention still further relates to the method for carrying out consolidated fill with aforementioned filling lotion.
Background technology
Mainly contain two types of filling methods in the prior art, the one, the worked-out section that the salt deposit exploitation forms utilizes liquid to carry out filling, and its material is mainly saturated bittern; The 2nd, the metal and nonmetal mineral deposit adopts the underground mining mode worked-out section that forms of digging up mine generally all to adopt tailing cemented filling.
Utilize the mode of saturated bittern bashing generally only to be applicable to the salt deposit of solution mining.When salt deposit adopts solution mining, charge into saturated bittern in the solution cavity after exploitation top board is played a supporting role, the protection face of land prevents surface collapse.But there are a large amount of personnel, equipment in the down-hole when salt deposit adopts the underground mining form, charges into the down-hole to a large amount of bittern with method again and certainly will form potential safety hazard to mining operations.Injecting a large amount of bittern in addition in the dead zone can have an effect and then soften ore pillar with ore pillar, reduces pillar strength, is unfavorable for the stability of dead zone, down-hole.Therefore it is little that this placement method is used in the worked-out section feasibility in sylvite class mineral deposit of underground mining.
Underground mining adopts the tailing cemented filling of high density mostly in the metal and nonmetal mine, the tailings of higher concentration be sent by pumping to the worked-out section after cement or other consolidating materials mix and carry out filling, tailings and consolidating material solidify the back and form stable obturator.In the exploitation of salt deposit because mine tailing is mainly NaCl and MgCl2, and these properties of materials determined its can not with the general glued firm obturator that forms such as cement.Though as adopt sand, stone etc. can form firm obturator and satisfy the filling requirement as the compaction material consolidated fill, a large amount of tail salt that the salt ore processes can only be stored up on ground, not only take a large amount of soils and can cause disadvantageous effect to environment.
Summary of the invention
Technical problem to be solved by this invention is the deficiency to prior art, provides a kind of new preparation of raw material reasonable, the glued effective filling lotion that utilizes salt deposit exploitation tail salt.
Another technical problem to be solved by this invention has provided a kind ofly utilizes above-mentioned filling lotion to carry out the method for consolidated fill, more reasonable, the safety and environmental protection of this method technology.
Technical problem to be solved by this invention is to realize through following technical scheme.The present invention is a kind of filling lotion that utilizes salt deposit exploitation tail salt, is characterized in:
It is the filling base material with sylvite or the tail salt of carnallitite ore after ore dressing processing;
The staple of filling base material is NaCl and MgCl 2, with semi-hydrated gypsum CaSO 4H 2O is a consolidating material; MgCl in described semi-hydrated gypsum and the filling base material 26H 2The mass ratio of O is 0.90 ~ 1.00:1; NaCl adds as the aggregate that solidifies the filling base material on demand, regulates the concentration of compaction material through the add-on of NaCl;
Filling base material and consolidating material mix down at 90 ~ 180 ℃ that to stir back formation mass concentration be 81% ~ 88% lotion.
Technical scheme under technical problem to be solved by this invention can also pass to further realizes.Above-described filling lotion is characterized in: contained NaCl in salt in harge granules that described NaCl comes out for screening behind broken, the ore grinding or the flotation tailings, and through obtaining the NaCl solid behind the dehydration by evaporation; Described MgCl 2The bischofite MgCl that obtains after through dehydration by evaporation for mine tailing 26H 2O.
Technical scheme under technical problem to be solved by this invention can also pass to further realizes.Above-described filling lotion is characterized in: filling base material and consolidating material mix down at 90 ~ 135 ℃ that to stir back formation mass concentration be 81% ~ 88% lotion; Further preferably mix down and stir the back to form mass concentration be 81% ~ 88% lotion at 90 ~ 100 ℃.
Technical scheme under technical problem to be solved by this invention can also pass to further realizes.Above-described filling lotion is characterized in: MgCl in described semi-hydrated gypsum and the filling base material 26H 2The mass ratio of O is 0.95:1;
Technical scheme under technical problem to be solved by this invention can also pass to further realizes.The invention also discloses a kind of method of utilizing the described filling lotion of technique scheme to carry out consolidated fill, be characterized in that its step is following:
(1) earlier on ground with tail salt NaCl and MgCl 26H 2O is heated to 135～180 ℃, with MgCl 26H 2O is decomposed into MgCl 22H 2O and H 2O is transported to steel basin then;
(2) consolidating material semi-hydrated gypsum CaSO 4H 2O is through to plaster of paris CaSO 42H 2O forms through rotary kiln device enure under 107 ℃～170 ℃ temperature; Consolidating material is transported to behind the steel basin and MgCl 22H 2O, NaCl mix, and form uniform filling lotion through stirring, and concentration is 81% ~ 88%;
(3) use pump pressure the filling lotion to be transported to the down-hole through filling pipe; Filling pipe along the filling vertical shaft ,-100m main return airway road, section return aircourse, return air raise arrive the worked-out section.
In the above-described placement method, the preferred double layer heat preservation pipe of described filling pipe.
Below technical scheme of the present invention is further set forth.
One, compaction material is selected and proportioning
The present invention mainly utilizes sylvite or the tail salt of carnallitite ore after ore dressing processing as compaction material, and its staple is NaCl and MgCl 2NaCl is mainly contained NaCl in screening is come out behind fragmentation, the ore grinding salt in harge granules and the flotation tailings, through obtaining the NaCl solid behind the dehydration by evaporation; MgCl 2Be mainly the bischofite (MgCl that mine tailing obtains after through dehydration by evaporation 26H 2O).
If only adopt these two kinds of materials of tail salt to carry out filling, obturator can not well be cemented in worked-out section and be that dispersion state ultimate compression strength is low to be difficult to satisfy the filling requirement.Therefore need in compaction material, increase a kind of gelling material, make its physics, chemical action compaction material had the hard integral body of certain intensity by the glued one-tenth of lotion through self.
Find semi-hydrated gypsum (CaSO through experimental study 4H 2O) be a kind of effective consolidating material.The slurry that semi-hydrated gypsum and water mix and stir can form dihydrate gypsum again, setting and harden and obtain intensity in drying process; And material is extensive, and acquisition cost is cheap easily.
The reaction that compaction material solidifies in the down-hole can be expressed as:
n?NaCl+3MgCl 2·6H 2O+4CaSO 4·?H 2O=?n?NaCl+?3MgCl 2·4H 2O+4CaSO 4·2H 2O
Can calculate MgCl in consolidating material semi-hydrated gypsum that needs add and the filling tail salt according to above chemical equation 26H 2The optimum mole ratio of O is 4:3, and its optimum quality ratio is 0.95:1.
NaCl in the tail salt can be used as the aggregate that solidifies obturator to be added as required, and regulates the concentration of compaction material through the add-on of controlling NaCl.
Compaction material can form firm obturator at worked-out section through physical-chemical reaction, and its uniaxial compressive strength can reach more than 6 MPa, satisfies the filling in mine requirement fully.
Two, compaction material preparation
Tail salt that ore dressing source mill comes out through after the simple dense dehydration mainly with NaCl and MgCl 26H 2O is similar to existence, at first stores up in the tail salt pond, to supply filling to use.At first tail salt is heated to 135～180 ℃ before the filling and makes bischofite (MgCl 26H 2O) decompose.Reaction equation is: MgCl 26H 2O → MgCl 22H 2O+4H 2O.NaCl after the decomposition and MgCl 22H 2O and high-temperature water arrive stirred pot and consolidating material semi-hydrated gypsum (CaSO through pipe-line transportation 4H 2O) mix.Consolidating material plaster of Paris (CaSO 4H 2O), claim the plaster of Paris again, can pass through natural dihydrate gypsum (CaSO 42H 2O) be called plaster stone again, through calcining, levigate obtaining.
Compaction material mixes back formation lotion and carries out filling through pipe-line transportation to worked-out section.The compaction material of preparation is pyritous NaCl, MgCl 22H 2O and CaSO 4H 2The high density slurry of O.Its concentration of compaction material mixture slurry is:
C=
Figure 636746DEST_PATH_IMAGE002
NaCl adds in the compaction material as aggregate, along with the increase compaction material concentration increase of NaCl ratio.According to the consolidated fill technical skill characteristic, reach at 81% ~ 88% o'clock at paste consistency and belong to paste body filling.Paste body filling has the advantage that slip good fluidity, degree of compactness are high, strength of filling mass is high, so it moves and the control effect of subsidence advantage preferably the rock stratum.
The minimum concentration of compaction material slurry is:
C＞
Figure 201110420167X100002DEST_PATH_IMAGE004
NaCl and MgCl when compaction material concentration reaches 88% 2Ratio the highest,
Figure 201110420167X100002DEST_PATH_IMAGE006
NaCl and MgCl 2Ratio be: 0≤n≤3.48,
Its mass ratio is: 0≤n '≤2.14 (water-free MgCl 2).
Three placement methods
Proportionally prepare compaction material and must satisfy the requirement of continuously stirring, continuous feeding after through two-stage agitation.The feeding coal of concentration, flow, pressure and various batchings through the control lotion prepares qualified lotion.
Carry lotion through the filling pipe route ground in filling borehole or the development engineering to the down-hole pump pressure.Main filling pipeline is arranged in the big lane, return air stage casing, through lateral the filling lotion is transported to each panel mineral building.Pipeline must be incubated that compaction material must keep certain temperature in the filling pipeline.The pipeline trend will keep avoiding fluctuated along the slope, and caliber can suitably change.A mineral building back production end at first is provided with fence when needing filling, because lotion concentration is high, mobile slowly therefore the fence requirement of strength is not high, can adopt hollow brick to build barricade by laying bricks or stones.The thin-wall steel tube of with anchor pole filling being used then is suspended in the mineral building top board, and the retrusive filling is removed pipe according to filling limit, filling progress limit.
The present invention utilizes tail salt and consolidating material to be made into the lotion of high density, and is fixed through physical-chemical reaction after the paste body filling material is pumped into worked-out section, do not need the stope dehydration just can form the obturator with certain intensity.Filling lotion of the present invention and method can avoid filling to starch intravital moisture softening destruction to ore pillar and country rock, thereby effectively safeguard mining safety, prevention surface collapse and sinking; Simultaneously can improve placement efficiency greatly through the ointment pumping technology; Make full use of ore dressing tail salt; Reduce tail salt and stored up floor space, mining area surface and peripheral ecological environment have been played effective protection, thereby had good economic benefit and huge environment and social benefit.This placement method had both been avoided the disadvantageous effect of a large amount of saturated bitterns to the exploitation security, had protected ground to prevent to subside and sink again, had fully utilized the tail waste salt simultaneously.
Embodiment
Further describe concrete technology implementation scheme of the present invention below.The cited embodiment of the present invention just describes preferred technique embodiment of the present invention, and is not to be confined to cited several kinds.
Embodiment 1, a kind of filling lotion that utilizes salt deposit exploitation tail salt, and it is the filling base material with sylvite or the tail salt of carnallitite ore after ore dressing processing;
The staple of filling base material is NaCl and MgCl 2, with semi-hydrated gypsum CaSO 4H 2O is a consolidating material; MgCl in described semi-hydrated gypsum and the filling base material 26H 2The mass ratio of O is 0.90:1; NaCl adds as the aggregate that solidifies the filling base material on demand, regulates the concentration of compaction material through the add-on of NaCl;
Filling base material and consolidating material mix down at 90 ℃ that to stir back formation mass concentration be 81% lotion.
Embodiment 2, a kind of filling lotion that utilizes salt deposit exploitation tail salt, and it is the filling base material with sylvite or the tail salt of carnallitite ore after ore dressing processing;
The staple of filling base material is NaCl and MgCl 2, with semi-hydrated gypsum CaSO 4H 2O is a consolidating material; MgCl in described semi-hydrated gypsum and the filling base material 26H 2The mass ratio of O is 1.00:1; NaCl adds as the aggregate that solidifies the filling base material on demand, regulates the concentration of compaction material through the add-on of NaCl;
Filling base material and consolidating material mix down at 135 ℃ that to stir back formation mass concentration be 88% lotion.
Embodiment 3, a kind of filling lotion that utilizes salt deposit exploitation tail salt, and it is the filling base material with sylvite or the tail salt of carnallitite ore after ore dressing processing;
The staple of filling base material is NaCl and MgCl 2, with semi-hydrated gypsum CaSO 4H 2O is a consolidating material; MgCl in described semi-hydrated gypsum and the filling base material 26H 2The mass ratio of O is 0.95:1; NaCl adds as the aggregate that solidifies the filling base material on demand, regulates the concentration of compaction material through the add-on of NaCl;
Filling base material and consolidating material mix down at 180 ℃ that to stir back formation mass concentration be 84% lotion.
Embodiment 4, in embodiment 1 or the 2 or 3 described filling lotions: and contained NaCl in salt in harge granules that described NaCl comes out for screening behind broken, the ore grinding or the flotation tailings, and through obtaining the NaCl solid behind the dehydration by evaporation; Described MgCl 2The bischofite MgCl that obtains after through dehydration by evaporation for mine tailing 26H 2O.
Embodiment 5, a kind ofly carry out the method for consolidated fill with any one described filling lotion among the embodiment 1-4, and its step is following:
(1) earlier on ground with tail salt NaCl and MgCl 26H 2O is heated to 135 ℃, with MgCl 26H 2O is decomposed into MgCl 22H 2O and H 2O is transported to steel basin then;
(2) consolidating material semi-hydrated gypsum CaSO 4H 2O is through to plaster of paris CaSO 42H 2O forms through rotary kiln device enure under 107 ℃ temperature; Consolidating material is transported to behind the steel basin and MgCl 22H 2O, NaCl mix, and form uniform filling lotion through stirring, and concentration is 81%;
(3) use pump pressure the filling lotion to be transported to the down-hole through filling pipe; Filling pipe along the filling vertical shaft ,-100m main return airway road, section return aircourse, return air raise arrive the worked-out section.
Embodiment 6, a kind ofly carry out the method for consolidated fill with any one described filling lotion among the embodiment 1-4, and its step is following:
(1) earlier on ground with tail salt NaCl and MgCl 26H 2O is heated to 180 ℃, with MgCl 26H 2O is decomposed into MgCl 22H 2O and H 2O is transported to steel basin then;
(2) consolidating material semi-hydrated gypsum CaSO 4H 2O is through to plaster of paris CaSO 42H 2O forms through rotary kiln device enure under 170 ℃ temperature; Consolidating material is transported to behind the steel basin and MgCl 22H 2O, NaCl mix, and form uniform filling lotion through stirring, and concentration is 88%;
(3) use pump pressure the filling lotion to be transported to the down-hole through filling pipe; Filling pipe along the filling vertical shaft ,-100m main return airway road, section return aircourse, return air raise arrive the worked-out section.
Embodiment 7, a kind ofly carry out the method for consolidated fill with any one described filling lotion among the embodiment 1-4, and its step is following:
(1) earlier on ground with tail salt NaCl and MgCl 26H 2O is heated to 150 ℃, with MgCl 26H 2O is decomposed into MgCl 22H 2O and H 2O is transported to steel basin then;
(2) consolidating material semi-hydrated gypsum CaSO 4H 2O is through to plaster of paris CaSO 42H 2O forms through rotary kiln device enure under 140 ℃ temperature; Consolidating material is transported to behind the steel basin and MgCl 22H 2O, NaCl mix, and form uniform filling lotion through stirring, and concentration is 84%;
(3) use pump pressure the filling lotion to be transported to the down-hole through filling pipe; Filling pipe along the filling vertical shaft ,-100m main return airway road, section return aircourse, return air raise arrive the worked-out section, described filling pipe is a double layer heat preservation pipe.
Embodiment 8, and a kind of filling lotion of salt deposit exploitation tail salt that utilizes carries out the method experiment of consolidated fill.
Certain carnallitite sylvite ore is positioned at kalium-magnesium deposit district, everything Plain, and landform is smooth in the district, and vegetation is luxuriant, and the face of land covers for the Quaternary system unconsolidated formation basically, and mostly ground is village, rice field, forest land.According to geographical position of living in, mining area and inside and outside condition of technology and economy, be particularly suitable for adopting novel ointment material consolidated fill method to cooperate mining.Its reason mainly comprises:
(1) face of land need obtain strict protection.In the mining effect scope, its face of land major part is farmland and ground water system, adopts this filling rule can prevent effectively that the stope top board from reaching the inbreak of covering Quaternary system, and farmland and face of land facility can be effectively protected.
(2) to be that main kalium-magnesium deposit bed buries deep thickness big for carnallitite, and ore deposit rock ultimate compression strength is low, and Protodyakonov coeffic is about 1, and property is crisp frangible, meets water electrode and is prone to dissolving.This stowing method can adapt to the characteristic of deposit mining technology condition, and timely filling mine tailing prevents ore pillar and country rock avalanche behind the extracting drift of less exposed area, safeguards back production safety.
(3) the mine tailing abraum salt can be fully used, and helps face of land ecological environmental protection.Mine tailing need take a large amount of soils, and will form the quite big artificial salt lake of area in the storage area if be stored in ground; If enter surface water body (river, river, lake, reservoir), polluted-water might cause ecological problem when serious.
(4) Along with people's is deepened and each national environmental protection policy reinforcement the non-renewable understanding of Mineral resources; Tail salt dry type consolidated fill method adopts and can be effectively protected to mining area surface and peripheral ecological environment; Ground tailing pond floor space greatly reduces, thereby has good economic benefit and huge environment and social benefit.
Mine capacity is carnallitite raw ore 650,000 t/a.Annual abraum salt NaCl quantum of output is 28.36 ten thousand t, annual MgCl 2Quantum of output is 24.54 ten thousand t.Obtain NaCl and MgCl behind the centrifuge dehydration of mine tailing process, the evaporative crystallization 26H 2O is deposited in the tail salt pond temporarily.
According to MgCl in the tail salt 2Cubage need in year to go out plaster of Paris (CaSO4 H 2O) amount is: m=24.54 ÷ 95 ÷ 3 * 4 * 145=49.94 ten thousand t
NaCl and MgCl in the tail salt 2Ratio be:
n=（28.36÷58.5）/（?24.54÷95）=1.88
Obtaining filling lotion concentration by above mixed compaction material is:
C=
Figure 740837DEST_PATH_IMAGE002
=
Figure 201110420167X100002DEST_PATH_IMAGE008
=83.37%
This compaction material concentration is fit to lotion and carries filling.
The ground Filling Station is at first with tail salt NaCl and MgCl 26H 2O is heated to 155 ℃, with MgCl 26H 2O is decomposed into MgCl 22H 2O and H 2O is transported to steel basin then.
Consolidating material plaster of Paris (CaSO4 H2O) passes through the plaster of paris (CaSO42H 2O) under 130 ℃ temperature, form through rotary kiln device enure.Consolidating material is transported to behind the steel basin in MgCl 22H 2O and NaCl mix, and through forming uniform filling lotion after stirred pot and the two-stage agitation of twin shaft blade mixer, concentration is about 83.37%, is transported to the down-hole by the all-hydraulic parallel bars piston of PM pump pressure at last.Filling pipe along the filling vertical shaft ,-100m main return airway road, section return aircourse, return air raise arrive the worked-out section.And filling pipe is a double layer heat preservation pipe, the filling vertical shaft ,-100m main return airway road, section return aircourse be for being responsible for the steel pipe that adopts diameter 150mm, is the pressure hose of arm employing diameter 125mm at return air raise and stope, and stowing capacity can reach 60m 3/ h.
Branch according to mining is selected is adopted the back production filling method, after mineral building back production one deck finishes, begins filling, and at first the hollow brick shutoff is used in ore removal route and return aircourse, prevents that the filling lotion from overflowing to stage casing haulage drift or main return airway road.The flexible pipe of with anchor pole filling being used then is suspended in the mineral building top board, and the retrusive filling is removed pipe according to filling limit, filling progress limit.Treat that a mineral building finishes the next mineral building of back filling.On obturator, exploit the ore deposit, upper strata after reaching design strength after obturator is fixed.

Claims (6)

1. filling lotion that utilizes salt deposit exploitation tail salt, it is characterized in that: it is the filling base material with sylvite or the tail salt of carnallitite ore after ore dressing processing;
The staple of filling base material is NaCl and MgCl 2, with semi-hydrated gypsum CaSO 4H 2O is a consolidating material; MgCl in described semi-hydrated gypsum and the filling base material 26H 2The mass ratio of O is 0.90 ~ 1.00:1; NaCl adds as the aggregate that solidifies the filling base material on demand, regulates the concentration of compaction material through the add-on of NaCl;
Filling base material and consolidating material mix down at 90 ~ 180 ℃ that to stir back formation mass concentration be 81% ~ 88% lotion.
2. filling lotion according to claim 1 is characterized in that: contained NaCl in salt in harge granules that described NaCl comes out for screening behind broken, the ore grinding or the flotation tailings, and through obtaining the NaCl solid behind the dehydration by evaporation; Described MgCl 2The bischofite MgCl that obtains after through dehydration by evaporation for mine tailing 26H 2O.
3. filling lotion according to claim 1 is characterized in that: filling base material and consolidating material mix down at 90 ~ 135 ℃ that to stir back formation mass concentration be 81% ~ 88% lotion.
4. filling lotion according to claim 1 is characterized in that: MgCl in described semi-hydrated gypsum and the filling base material 26H 2The mass ratio of O is 0.95:1.
5. one kind is carried out the method for consolidated fill with claim 1 or 2 or 3 or 4 described filling lotions, it is characterized in that its step is following:
(1) earlier on ground with tail salt NaCl and MgCl 26H 2O is heated to 135～180 ℃, with MgCl 26H 2O is decomposed into MgCl 22H 2O and H 2O is transported to steel basin then;
(2) consolidating material semi-hydrated gypsum CaSO 4H 2O is through to plaster of paris CaSO 42H 2O forms through rotary kiln device enure under 107 ℃～170 ℃ temperature; Consolidating material is transported to behind the steel basin and MgCl 22H 2O, NaCl mix, and form uniform filling lotion through stirring, and concentration is 81% ~ 88%;
(3) use pump pressure the filling lotion to be transported to the down-hole through filling pipe; Filling pipe along the filling vertical shaft ,-100m main return airway road, section return aircourse, return air raise arrive the worked-out section.
6. method according to claim 5 is characterized in that: described filling pipe is a double layer heat preservation pipe.
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CN102536315A (en) * 2011-12-30 2012-07-04 中农矿产资源勘探有限公司 Filling method of potash mine goaf
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
CN103953389A (en) * 2014-04-21 2014-07-30 化工部长沙设计研究院 Tachydrite-layer-contianing carnallite type potassic salt ore goaf filling method
CN103953389B (en) * 2014-04-21 2016-04-13 化工部长沙设计研究院 A kind of carnallite type potash salt ore goaf filling method containing tachydrite layer
CN105523747A (en) * 2016-01-27 2016-04-27 济南大学 Mine filling cementing material and preparation method thereof
CN105690559A (en) * 2016-01-28 2016-06-22 中国矿业大学(北京) Filling body preparation method capable of reducing cementing agent consumption
CN105690559B (en) * 2016-01-28 2018-05-08 中国矿业大学(北京) A kind of filling preparation that can save binder dosage
CN105777036A (en) * 2016-03-16 2016-07-20 武汉理工大学 Phosphorus-based salt mine goaf filler prepared from ardealite solidification salt waste
CN105777036B (en) * 2016-03-16 2018-11-13 武汉理工大学 A kind of phosphorus base salt mine stope filler prepared using ardealite solidification salt waste
WO2020114168A1 (en) * 2018-12-07 2020-06-11 山东科技大学 Mine crystalline salt waste utilization method

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