CN1057825A

CN1057825A - Mine used high water bed solidification support material

Info

Publication number: CN1057825A
Application number: CN 90103141
Authority: CN
Inventors: 孙恒虎; 邱运新; 吴兆元; 吴健
Original assignee: Shandong Yantai Ocean Applied Science And Technology Research Institute; Zhaoyuan Gold Mine Shandong Province; Beijing Graduate School Of China University Of Mining And Technology
Current assignee: Shandong Yantai Ocean Applied Science And Technology Research Institute; Zhaoyuan Gold Mine Shandong Province; Beijing Graduate School Of China University Of Mining And Technology
Priority date: 1990-06-28
Filing date: 1990-06-28
Publication date: 1992-01-15
Anticipated expiration: 2005-06-28
Also published as: CN1024918C

Abstract

The invention discloses a kind of mine used high water bed solidification support material, be characterized in:

1, by Al ₂O ₃The special cement that content is high adds a small amount of citric acid and converts water and be mixed with first slip liquid and add a small amount of yellow soda ash by anhydrite, unslaked lime, wilkinite and lime carbonate and convert two kinds of slurries that water is mixed with B material slurry and be mixed and made into;

2, can place separately before two kinds of slurries mix and not solidify in 12～48 hours, after both mixed, 15～30 minutes was solidifiable, and 6 hours intensity that have after solidifying reach more than the 1MPa, and intensity reached 2～4MPa in 24 hours, and final strength can reach more than the 6MPa.

The content of water reaches 72% (weight ratio) in this material, have cost low, increase that resistance is fast, residual strength is high, good toughness, advantage such as nontoxic, harmless, be good roadside support material.

Description

Mine used high water bed solidification support material

The invention discloses a kind of be applicable to mine filling, mine working supporting, every wind locking leak, mine used high water bed solidification support material flame-retarding fire-extinguishing, that be specially adapted to do side supporting material of road retained for next sublevel.

Along with improving constantly of coal mining mechanization degree, stope is taken over the continuous shortening in cycle, edge air gallery technology is adopted in the Coal Production an urgent demand, adopt edge air gallery technology, each working face can be dug a tunnel less, the nervous problem of face take-over that causes thereby the alleviation face take-over cycle constantly shortens.But for many years, edge air gallery technology is not ideal enough always in the application of China, and its major cause is not find the roadside support material that is suitable for gob-side entry retaining support one country rock interaction rule.In the past be wooden prop, waste pack, give system concrete segment etc. that the mechanical property that these materials have is not good along the sky roadside support material of leaving a blank, the deficiency in economic performance that has, the then use inconvenience that has, thereby be not widely used.

The object of the present invention is to provide a kind of have excellent mechanical performances and economic benefit, easy to use, nontoxic, be specially adapted to mine used high water bed solidification support material as side supporting material of road retained for next sublevel.

Mine used high water bed solidification support material is characterised in that:

1, by Al ₂O ₃First material siccative that the special cement that content is high (as high-alumina refractory cement, alumina cement, sulphoaluminate cement clinker, ferro-aluminate cement grog, fluoroaluminate cement) and a spot of citric acid are formulated and the second material siccative that is mixed with by gypsum, unslaked lime, wilkinite, lime carbonate (or flyash) and a small amount of yellow soda ash, two kinds of siccatives add water first slip liquid and the B material slurry remix that the back forms that stir respectively and form together.

2, in first slip liquid and B material slurry, the weight ratio of siccative and water is:

First material siccative: water=1: 1.5～3.0

Second material siccative: water=1: 1.5～3.0.

3, the content of citric acid is 0.1～1.0%(weight ratio of first material siccative in the first material), the content of yellow soda ash is 0.3～2.0%(weight ratio of first material siccative in the second material).

4, the content of various batchings is (weight ratio) in the second material siccative:

Gypsum: 40～70%;

Unslaked lime: 10～30%;

Wilkinite: 10～30%;

Lime carbonate (or flyash): 10～30%.

5, first material and second material blended weight ratio are 1: 1.

6, first material, B material slurry are placed separately, can reach 12～48 hours does not respectively solidify, after first material, B material slurry are sneaked into together, 15～30 minutes is solidifiable, the one hour intensity that has after solidifying reaches more than the 0.1MPa, more than 6 hours intensity 1MPa, and intensity 2～4MPa of 24 hours, three days intensity 4～6MPa, final strength reaches more than the 6MPa.

Because first slip liquid and the independent placement of B material slurry can reach 12～48 hours and not solidify, good fluidity is adapted to the pumping filling especially; Because two kinds of slurries mix 15～30 minutes with regard to solidifiable, resistance increases fast, be specially adapted to as along staying the roadside support material in lane and, also be applicable to and use aspect the engineerings such as, waterproofing and leakage-stopping fire-retardant, the spray of roadway anchor in the needs fire extinguishing as the mine ventilation isolated material.

Embodiment example one:

With mine used high water bed solidification support material as the gob-side entry retaining roadside support:

(1) the citric acid uniform mixing that adds sulplo-aluminate weight 0.3% in the sulphoaluminate cement clinker powder is made first material siccative;

(2) with anhydrite powder, calcium lime powder, sodium bentonite in powder and Paris white be by weight:

Gypsum: unslaked lime: sodium bentonite: lime carbonate=7: 2: 3: 3 proportioning is made into second material siccative after the yellow soda ash that adds anhydrite, unslaked lime, sodium bentonite and lime carbonate gross weight 1% again mixes;

(3) in first is mixed agitated pool, by weight, the first material: the ratio of water=30: 70 is converted water with the first material and is made first slip liquid;

(4) in second is mixed agitated pool, by weight, the second material: the ratio of water=30: 70 is converted water with the second material and is made B material slurry;

(5) respectively first slip liquid and B material slurry being delivered to gob-side entry retaining roadside support filling place synchronously with two cover technical parameters the same slush pump and transfer lines, is that near 1: 1 the ratio back that roadside support filling place two kinds of slurries is mixed is injected in the roadside support filling bag that has set and got final product in both mixed volume ratios.

Embodiment example two:

Make the coalmine ventilation sealed wall with mine used high water bed solidification support material:

(1) makes first material siccative behind the citric acid uniform mixing with adding high-alumina refractory cement weight 0.3% in the high-alumina refractory cement;

(2) with anhydrite powder, calcium lime powder, sodium bentonite in powder and flyash by weight being anhydrite: unslaked lime: sodium bentonite: flyash=7: 2: 3: 2 proportioning, make second material siccative after adding the yellow soda ash uniform mixing of anhydrite, unslaked lime, sodium bentonite and flyash gross weight 0.5% again;

(3) mix in the agitated pool by weight first material siccative: water=28: 72 respectively in first, second; Second material siccative ratio: water=first material siccative, second material siccative converted water be mixed into liquid at 28: 72;

(4) respectively two kinds of slurries are delivered to synchronously near the sealed wall that will build with the slush pump of two cover technical parameter unanimities and transfer line;

(5) be that 1: 1 ratio is mixed the back with two kinds of slurries and injected to have set in the divider wall template groove or in the bag and get final product by volume.

Claims

1, mine used high water bed solidification support material is characterized in that:

By Al ₂O ₃The first material siccative that the special cement that content is high (as: high-alumina refractory cement, alumina cement, sulphoaluminate cement clinker, ferro-aluminate cement grog, fluoroaluminate cement) and a small amount of citric acid are mixed with and add the stir first slip liquid that then forms and B material slurry of water respectively by two kinds of siccatives of the second material siccative of gypsum, unslaked lime, wilkinite, lime carbonate (or flyash) and a small amount of yellow soda ash preparation and mix again and form.

2, according to claim 1, it is characterized in that: in first slip liquid and B material slurry, the siccative separately and the weight ratio of amount of water are: first material siccative: water=1: 1.5～3.0

Second material siccative: water=1: 1.5～3.0.

3, according to claim 1,2, it is characterized in that:

The content of citric acid is 0.1～1.0% of first material siccative weight in the first material,

The content of yellow soda ash is 0.3～2% of first material siccative weight in the second material.

4, according to claim 1,2,3, it is characterized in that:

In the second material siccative (weight percent): gypsum content is 40～70%,

Unslaked lime content is 10～30%,

Bentonite content is 10～30%,

Calcium carbonate content is 10～30%.

5, according to claim 1,2,3,4, it is characterized in that:

In the mine used high water bed solidification support material slurries, the weight ratio of first material and second material is 1: 1.

6, according to claim 1,2,3,4,5, it is characterized in that:

First material, B material slurry are placed separately respectively, can reach 12～48 hours and not solidify, and the first material is after B material slurry is sneaked into, and 15～30 minutes is solidifiable.