CN1162058A - Residue-less pillar recovering method - Google Patents
Residue-less pillar recovering method Download PDFInfo
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- CN1162058A CN1162058A CN 96115738 CN96115738A CN1162058A CN 1162058 A CN1162058 A CN 1162058A CN 96115738 CN96115738 CN 96115738 CN 96115738 A CN96115738 A CN 96115738A CN 1162058 A CN1162058 A CN 1162058A
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- concrete
- tailings
- obturation
- pillar
- cement
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- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The present invention relates to two-step filling mining method. On the premise of no changing originalf illing process and no raising cost, said invented method centralizes and uses the cement mixed in original filling material to enhance local strength so as to make the whole strength of filling material increase to above 35 kg/cu cm, and can make the two-step mining process not remain pillar and can completely recover ore embedded in filling material so as to raise the rate of recovery mining and can prevent milltailings.
Description
The present invention relates to mining with stowing, say it is residue-less pillar recovering method in more detail.
In the currently used method of mining by the way of filling, it is casting resin that all mines all add cement mixing with tailings, be filled to and adopt in the empty mineral building, because pumping plant is located at the face of land, be subjected to the restriction of transport condition, concentration of hydraulic mixture generally is controlled at 50%--70%, otherwise conveyance conduit easily stops up, and adds that each sand off scrubs pipeline, and the water yield in the tailings also can increase, under this concentration, tailings and cement generation segregation phenomenon, cement is the top layer that is suspended in obturation basically, because the water yield is excessive, it is long that moisture content drains the time, cement does not solidify, and the middle and lower part of obturation does not have the cement composition not solidify, thereby the obturation bulk strength is very low, for guarantee two steps when adopting obturation be unlikely and flow to mineral building, the mine that has is sprayed the thick cement of 30--50 centimetre and is refilled tailings on the mineral building wall adopted of step, increasing the intensity of obturation, yet when adopting in two steps, because the concrete that sprays does not reach the intensity of requirement and is subjected to the influence of concussion of blasting, also need stay a certain amount of ore pillar and be replenished mineral building wall intensity.Ore loss ratio generally about 5%, in addition because theing cement solidifies of obturation surface is bad, so when adopting next layering, have the part ore to embed in the obturation, can not reclaim during ore removal fully, and loss late is about 3%.
In order to address the above problem, the mine that has useful high alumina cement replacement ordinary Portland cement stirs into the example of casting resin, but because the cost height, concentration is unreasonable, and intensity also can only reach 10Kg/Cm
3About, have a long way to go with actual desirable strength, and be difficult to promote.
The present invention is exactly a kind of residue-less pillar recovering method that proposes at the problem of above existence, this method can fully strengthen strength of filling mass, two steps pillar not when adopting, make the ore pillar that loses in the former mining codes can complete extraction, and the ore that embeds in the obturation is all reclaimed and avoid in the ore removal process casting resin to sneak in the ore, cause ore dilution.
Concrete scheme of the present invention is: adopt the two step method mining with stowing, after sky was adopted in a layering, the goaf filling tailings to last layering directly injected obturation edge or concrete perfusion with cement then, and the formation concrete wall, again at obturation surface filling one layer concrete.
The present invention also can place template earlier, tailings in template, and the outer fluid concrete of template is withdrawn from after the template at obturation surface filling concrete.
The concrete of this method adopts tailings, also can add an amount of accelerating admixture in cement.
The irrigator of this method concrete perfusion comprises sebific duct, terminal pad and intrusion pipe, and fill orifice is arranged on the intrusion pipe.
The present invention is not increasing under the constant prerequisite of expense and former filling process, the cement of sneaking into former casting resin is concentrated used, and strengthens local strength, has solved cement segregation phenomenon in the former casting resin, thereby has made the obturation bulk strength increase to 35kg/cm
3, maximum can reach 100kg/cm
3, made for two steps adopt pillar not and the ore that will embed in the obturation reclaims substantially, raising rate of extraction 6--10%, and avoided the tailings in the ore removal process to sneak into.
Below in conjunction with accompanying drawing, the embodiment that the present invention is had advantage most is described further.
Fig. 1 of the present invention has represented the situation of separate zone production and tailings.(1) is the room of digging up mine in a step among the figure.(1 ') is that to adopt obturation, (2) step be that two steps mining room, (2 ') are that two step mining rooms and obturation, (3) are that the unmined bed, (4) in step mining room is two to go on foot adopt top layer concrete for top layer concrete, (8) for concrete wall, (9) for tailings, (7) for slicing and filling body, (6) for adopting dead level (5).
Fig. 2 comprises sebific duct (11), terminal pad (12), irrigator (13) and fill orifice (14) for the signal of concrete spouting device.
The present invention's separate zone production in a step mining room (1), after sky is adopted in a layering, Form goaf (4), goaf filling tailings and the concrete to last layering is again Be obturation (5), and then exploit next layering--unworked country (3). This method filling During tailings (6), with originally be added in the casting resin cement on request moisture blend together pulpous state, Adopt special irrigator directly to enter the mineral building edge, form firm coagulation one Cob wall (8), and at surface filling concrete (7), exploit again unworked country (3), exploited After, again (4) tailings and concrete perfusion to the goaf, hierarchical operations is to the ore deposit like this Roof section namely becomes the box type integral of a multilayer, forms a sufficiently high step of intensity Adopt obturation (1 '), the obturation concrete walls can bear the shake of mining and explosion fully Moving, when being adopted, two steps without pillar, ore recovery rate is reached more than 95%.
The present invention can also prop up cope match-plate pattern when tailings, the limit of template and mineral building Edge has a certain amount of space, tailings in the template, and the concrete of outside template, annotating, After treating that tailings moisture drains substantially, limit filling concrete edge is removed template, exists at last Filling one layer concrete in surface carries out exploitation and the filling of next layering, again until the ore deposit Roof section.
Can also be with manually digging along the mineral building edge behind tailings in order to reduce cost Go out the space of one fixed width, cast concrete again, and form the method for concrete walls.
The present invention fills with identical method layering in the goaf in two step mining rooms (2) Fill out, difference is need not be to concrete perfusion in the tailings, the top layer concrete of only annotating (9). The operation that the intensity of top layer concrete (7) (9) is enough to bear ore removal machinery is eliminated Ore embed in the obturation, so both reduced the ore losses in the ore deposit process that falls, The tailings that has reduced again in the ore removal process is sneaked into.
The present invention behind tailings during concrete perfusion, adopt special-purpose irrigator (as Fig. 2 shows). Irrigator comprises sebific duct (11). Terminal pad (12) and intrusion pipe (13). Fill with Annotating pipe has a plurality of fill orifices (14), and sebific duct is connected with the carrier pipe of slush pump.
The sand that concrete of the present invention is used adopts tailings, like this can be nearby in the tunnel Interior ready-mixed concrete has reduced expense, increases construction speed, has increased again concrete Toughness.
The present invention can divide according to the height in goaf 2 times 1 time when bashing Or 3 fillings.
In order in work progress, to increase programming, increase concrete intensity, can in cement, add an amount of accelerating admixture.
Embodiment 1: separate zone production in a step mining room (1) forms goaf (4) after sky is adopted in a layering.Again to the goaf filling tailings (6) of last layering, and, form concrete wall (8), the layer concrete (7) of annotating on the surface again with irrigator edge concrete perfusion.
Embodiment 2: prop up cope match-plate pattern in the goaf, there is a certain amount of space in template and goaf, are generally 30--50cm, tailings in template, artificial concrete perfusion outside template, treat that tailings moisture drains substantially after, concrete perfusion limit, limit is extracted template, the layer concrete of annotating on the surface again out.
Claims (4)
1. residue-less pillar recovering method adopts the two step method mining with stowing, it is characterized in that then cement directly being injected obturation edge or concrete perfusion to the tailings of last layering goaf filling cement-free, again at obturation surface filling one layer concrete.
2. residue-less pillar recovering method according to claim 1 is characterized in that and can place template earlier in the goaf, tailings in template, and the outer fluid concrete of template is again at obturation surface filling concrete.
3. residue-less pillar recovering method according to claim 1 and 2 is characterized in that said concrete adopts tailings with sand, also can add an amount of accelerating admixture in cement.
4. first remnant pillar back production method is characterized in that the concrete spouting device comprises sebific duct (1), terminal pad (2) and intrusion pipe (3), has fill orifice (4) on the intrusion pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115738 CN1162058A (en) | 1996-04-05 | 1996-04-05 | Residue-less pillar recovering method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96115738 CN1162058A (en) | 1996-04-05 | 1996-04-05 | Residue-less pillar recovering method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1162058A true CN1162058A (en) | 1997-10-15 |
Family
ID=5122963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96115738 Pending CN1162058A (en) | 1996-04-05 | 1996-04-05 | Residue-less pillar recovering method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1162058A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634227B (en) * | 2008-07-22 | 2011-08-31 | 鞍钢集团矿业公司 | Flat-bottomed trench shallow hole shrinkage method |
| CN104234716A (en) * | 2014-07-22 | 2014-12-24 | 长沙矿山研究院有限责任公司 | Bagged-cofferdam filling mining method |
-
1996
- 1996-04-05 CN CN 96115738 patent/CN1162058A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101634227B (en) * | 2008-07-22 | 2011-08-31 | 鞍钢集团矿业公司 | Flat-bottomed trench shallow hole shrinkage method |
| CN104234716A (en) * | 2014-07-22 | 2014-12-24 | 长沙矿山研究院有限责任公司 | Bagged-cofferdam filling mining method |
| CN104234716B (en) * | 2014-07-22 | 2016-08-24 | 长沙矿山研究院有限责任公司 | The packed cofferdam method of mining by the way of filling |
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| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |