阅读说明：本技术 一种矿山井下喷浆支护高强度混凝土配比方法 (Proportioning method of high-strength concrete for underground shotcrete support of mine ) 是由 许志逞 于 2019-04-30 设计创作，主要内容包括：本发明涉及一种矿山井下喷浆支护高强度混凝土配比方法,混凝土的组分如下：水、水泥、微硅粉、煤渣灰、山砂、江砂、高强度铁尾砂、重选石子片、超塑化剂、无碱速凝剂、高强度合成纤维、黄药、松醇油以及松香热聚皂,上述组分按照一定的质量配比混合制成高强度混凝土。该方案可以有效的降低混凝土生产成本,提高喷浆支护混凝土的抗压强度、增强混凝土的抗折强度、降低喷射回弹量,有效改善矿岩破碎区域的巷道支护状况,保证安全生产。(The invention relates to a proportioning method of high-strength concrete for underground guniting support of a mine, which comprises the following components: the concrete is prepared from water, cement, silica fume, coal slag ash, mountain sand, river sand, high-strength iron tailings, gravity-separated stone chips, a superplasticizer, an alkali-free accelerator, high-strength synthetic fibers, xanthate, pine oil and rosin thermal-polymerization soap which are mixed according to a certain mass ratio. The scheme can effectively reduce the production cost of concrete, improve the compressive strength of the shotcrete supporting concrete, enhance the flexural strength of the concrete, reduce the jet resilience amount, effectively improve the roadway supporting condition of a mine rock crushing area and ensure safe production.)

1. A proportioning method of high-strength concrete for mine underground shotcrete support is characterized in that the concrete comprises the following components:

the concrete is prepared from water, cement, silica fume, coal slag ash, mountain sand, river sand, high-strength iron tailings, gravity-separated stone chips, a superplasticizer, an alkali-free accelerator, high-strength synthetic fibers, xanthate, pine oil and rosin thermal-polymerization soap which are mixed according to a certain mass ratio.

2. The proportioning method of the high-strength concrete for the mine underground guniting support according to claim 1, wherein the proportioning of the water, the cement, the silica fume, the cinder ash, the sand, the river sand, the high-strength iron tailings, the gravity concentration stone chips, the superplasticizer, the alkali-free setting accelerator, the high-strength synthetic fibers, the xanthate, the pine alcohol oil and the rosin thermal poly soap is as follows according to the mass ratio:

160—180：360—390：23—27；5—8：340—360：340—360；610—650；340—360；3.5—4：1.5—2.0：5—7：5—8：3.5—4：10—13。

3. the proportioning method of the high-strength concrete for the mine underground guniting support according to claim 2, wherein the proportioning of the water, the cement, the silica fume, the cinder ash, the sand, the river sand, the high-strength iron tailings, the gravity concentration stone chips, the superplasticizer, the alkali-free setting accelerator, the high-strength synthetic fibers, the xanthate, the pine alcohol oil and the rosin thermal poly soap is as follows according to the mass ratio: 168.75:375:25:7.5:351: 351:634:351: 3.75:1.875:6:7.5:3.75:11.25.

4. The proportioning method of high-strength concrete for underground guniting support of mine according to claim 2 or 3, wherein the grain size of reselected stone chips is concentrated to be 0.074mm-16 mm.

5. The proportioning method of high-strength concrete for underground guniting support of mine according to claim 2 or 3, wherein the blending proportion of the coal slag ash as the admixture of concrete is 2% of the weight of cement.

6. The proportioning method of high-strength concrete for underground guniting support of mine according to claim 2 or 3,

the accelerator is Signal L5601 AF, and the chemical components are as follows: the inorganic aluminum compound salt has the viscosity of less than 400mmPa, the density of 1.44kg/L and the pH value of 2.5, and is an environment-friendly chlorine-free alkali-free liquid accelerator.

7. The proportioning method of high-strength concrete for underground guniting support of mine according to claim 2 or 3, wherein the high-strength synthetic macro-Fiber uses Sika Fiber Force-60, the chemical component polyhydroxy hydrocarbon has the density of 910Kg/m for thin-wall construction, the Fiber length is 45-60mm, the equivalent diameter is 0.84mm, the melting point resistance is 170 ℃, the tensile strength is 430MPa, and the tensile elastic modulus is 6 GPa.

8. The proportioning method of the high-strength concrete for the mine underground shotcrete support according to claim 1, wherein the blending amount of the xanthate is 2% of the weight of the cement; the mixing amount of the pine oil is 1% of the weight of the cement, the density is 0.9-0.915 kg/l, the pine oil is slightly soluble in water, and the rosin heat polysoap added into the concrete accounts for 3% of the weight of the cement.

Technical Field

The invention relates to a concrete preparation method, in particular to a proportioning method of high-strength concrete for underground guniting support of a mine, and belongs to the technical field of concrete production and processing.

Background

Aiming at the condition that the condition of stripped ore rock in the underground mining production process of an underground mine is poor, the area with poor ore rock condition needs to be subjected to guniting support, and in order to ensure the overall strength, the strength of guniting support concrete needs to be improved.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides a method and a device for proportioning high-strength concrete for underground shotcrete support of a mine, the technical scheme ensures the overall strength and improves the strength of the shotcrete support concrete, and a certain proportion of dense silica fume, coal slag ash, high-strength synthetic fiber, well-graded river sand, high-strength tailing sand, gravity concentration stone chips, superplasticizer, alkali-free accelerator, xanthate, pine oil and rosin thermal polymerization soap are innovatively added into a proportioning material of the shotcrete support concrete, so that the production cost of the concrete can be effectively reduced, the compressive strength of the shotcrete support concrete is improved, the flexural strength of the concrete is enhanced, the injection resilience is reduced, the roadway support condition of an ore rock crushing area is effectively improved, and the safe production is ensured.

In order to achieve the purpose, the technical scheme of the invention is as follows, and the proportioning method of the high-strength concrete for the underground guniting support of the mine is characterized in that the concrete comprises the following components:

the concrete is prepared from water, cement, silica fume, coal slag ash, mountain sand, river sand, high-strength iron tailings, gravity-separated stone chips, a superplasticizer, an alkali-free accelerator, high-strength synthetic fibers, xanthate, pine oil and rosin thermal-polymerization soap which are mixed according to a certain mass ratio.

As an improvement of the invention, the proportion of the water, the cement, the micro silicon powder, the coal cinder ash, the mountain sand, the river sand, the high-strength iron tailings, the gravity concentration stone chips, the superplasticizer, the alkali-free accelerator, the high-strength synthetic fiber, the xanthate, the terpineol oil and the rosin heat polysoap is as follows according to the mass ratio:

160—180：360—390：23—27；5—8：340—360：340—360；610—650；340—360；3.5—4：1.5—2.0：5—7：5—8：3.5—4：10—13。

as an improvement of the invention, the proportion of the water, the cement, the micro silicon powder, the coal cinder ash, the mountain sand, the river sand, the high-strength iron tailings, the gravity concentration stone chips, the superplasticizer, the alkali-free accelerator, the high-strength synthetic fiber, the xanthate, the terpineol oil and the rosin heat polysoap is as follows according to the mass ratio: 168.75:375:25:7.5:351: 351:634:351: 3.75:1.875:6:7.5:3.75:11.25.

As an improvement of the invention, the grain size of the reselected pebble slices is concentrated to be 0.074mm-16 mm.

As an improvement of the invention, the cinder ash is used as an admixture of concrete and is mixed in a proportion of 2% of the weight of the cement.

As an improvement of the invention, the accelerator is Sigunit L5601 AF, and the chemical components are as follows: the inorganic aluminum compound salt has the viscosity of less than 400mmPa, the density of 1.44kg/L and the pH value of 2.5, and is an environment-friendly chlorine-free alkali-free liquid accelerator.

As an improvement of the invention, the high-strength synthetic macro Fiber uses Sika Fiber Force-60, chemical composition polyhydroxyhydrocarbon is obtained by carrying out cultivation with the density of 910Kg/m, the Fiber length is 45-60mm, the equivalent diameter is 0.84mm, the melting point resistance is 170 ℃, the tensile strength is 430MPa, and the tensile elastic modulus is 6 GPa.

As an improvement of the invention, the dosage of the xanthate is 2 percent of the weight of the cement; the mixing amount of the pine oil is 1% of the weight of the cement, the density is 0.9-0.915 kg/l, the pine oil is slightly soluble in water, and the rosin heat polysoap added into the concrete accounts for 3% of the weight of the cement.

Compared with the prior art, the invention has the following technical effects: by using the proportion, the usage amount of the mountain sand can be effectively reduced in a reasonable range, gravel is completely replaced, the production cost of the concrete is greatly reduced, the rebound rate of the shotcrete support is reduced by 8-10% from the previous 15-20%, dust generated in field operation is reduced, the deformation resistance of the concrete is improved, the toughness and the impact strength of the concrete are enhanced, the crack resistance of the concrete is enhanced, the compressive strength of the shotcrete support concrete (the compressive strength is also improved to 25-30MPa from the previous 20-25 MPa), the flexural strength of the concrete is enhanced, the rebound amount of the shotcrete is reduced, the roadway support condition of an ore rock crushing area is effectively improved, and safe production is ensured.

The specific implementation mode is as follows:

the following detailed description of the invention is provided to facilitate an understanding of the invention.