阅读说明：本技术 一种用于矿井巷道的隔热装置及其施工方法 (Heat insulation device for mine roadway and construction method thereof ) 是由 陈绍杰 杜兆文 尹大伟 江宁 葛尧 马波 于 2019-11-25 设计创作，主要内容包括：本发明公开了一种用于矿井巷道的隔热装置及其施工方法,所述固废隔热装置的结构包括锚索、锚杆、围岩、固废隔热模板、混凝土层、巷道、温度传感器,本发明利用固废材料高温烧结制备隔热模板,模板具良好的隔热性能和支护作用,可以降低固废排放,减少占用耕地面积,施工方法中采用50％的锚固预紧力,可以解决巷道变形时,高预紧力的支护失效,隔热模板和围岩分离问题。(The invention discloses a heat insulation device for a mine roadway and a construction method thereof, wherein the structure of the solid waste heat insulation device comprises an anchor rope, an anchor rod, surrounding rocks, a solid waste heat insulation template, a concrete layer, the roadway and a temperature sensor.)

1. A heat-proof device for mine tunnel, characterized in that, useless heat-proof device admittedly includes: anchor rope (1), stock (2), country rock (3), gu useless thermal-insulated template (4), concrete layer (5), tunnel (6), temperature sensor (7), tunnel (6) set up inside country rock (3), gu useless thermal-insulated template (4) pass through anchor rope (1) and stock (2) fixed the setting on country rock (3), concrete layer (5) spray cover on the outer wall of solid useless thermal-insulated template (4), temperature sensor (7) set up on tunnel (6).

2. A construction method of a heat insulation device for a mine roadway is characterized by comprising the following steps:

(1) according to the roadway temperature displayed by the temperature sensor, the thickness of the initial type of the solid waste heat insulation template is calculated, and the calculation formula is Q ═ KF (T1-T2), wherein Q: thickness of the initial form of the solid waste heat insulation template, K: the heat insulation coefficient of the solid waste heat insulation template, F: roadway surface area to be provided with a heat insulation device, T1: in-tunnel temperature, T2: ideal temperature in the roadway, and then preparing a solid waste heat insulation template prototype by using a solid waste material, wherein the template prototype is mainly molded according to the shape of the deep well roadway;

(2) the primary heat insulation template is placed in an environment of 1200 ℃ to be sintered at high temperature to form a heat insulation template;

(3) after the heat insulation template is arranged underground, splicing the heat insulation template according to the shape of a roadway, and fastening the spliced heat insulation template on the surface of the surrounding rock through an anchor rod and an anchor cable device;

(4) after the heat insulation template is fastened on the surface of the roadway, concrete is sprayed on the outer surface of the heat insulation template to carry out lining outer layer.

3. The construction method of the heat insulation device for the mine roadway according to claim 2, wherein the initial form of the solid waste heat insulation template in the step (1) is formed by combining water, caustic sludge, a foaming agent and a foam stabilizer according to a certain proportion.

4. The construction method of the heat insulation device for the mine roadway according to claim 3, wherein the ratio of the water to the caustic sludge is 7: and 3, the foaming agent and the foam stabilizer respectively account for 0.2-0.4 percent of the total mass of the water and the alkaline residue.

5. The construction method of the heat insulation device for the mine laneway according to the claim 3, characterized in that the heat insulation template in the step (2) is verified by a plurality of tests, the strength can reach 30MPa-60MPa, and the heat conductivity coefficient is 0.2-0.3.

6. The method for constructing a heat insulation device for a mine tunnel according to claim 3, wherein the intermediate anchor rods on the two sides of the tunnel in the step (3) are only 50% pre-tensioned.

Technical Field

The invention relates to the technical field of mine cooling, in particular to a heat insulation device for a mine roadway and a construction method thereof.

Background

With the rapid development of economy and society in China, the large-scale total amount of industrial solid wastes (such as alkaline residues and gold tailings) is increased rapidly. Taking the caustic sludge as an example, the caustic sludge is waste residue discharged in the process of preparing alkali by an ammonia-soda process. The ammonia-soda process for preparing alkali in China can reach 421 ten thousand t/year. 0.3t of caustic sludge needs to be discharged outwards when 1t of soda is produced, and the cost for waste residue discharge is about 1000 ten thousand yuan each year in a factory producing 80 ten thousand of soda each year. In general, the caustic sludge is processed by surface accumulation, and a large amount of caustic sludge is deposited to form a 'white sea', which causes pollution to the surrounding environment. The alkaline residue is effectively utilized, and the waste is changed into valuable, so that the method has obvious social benefit and economic benefit.

The method has important significance in organically combining the solid waste of the alkaline residue and the heat insulation of the deep well tunnel. The method can effectively reduce the discharge of solid waste and isolate the rock temperature of the roadway. Therefore, the development of economical, efficient and practical mine heat insulation methods and technologies to ensure the physical and psychological health of heat-harmed mine workers is a necessary premise for realizing the safe development of deep mineral resources.

Along with the continuous increase of the mining depth of the mine, the ground temperature gradually rises, and the temperature of part of mining working faces of the mine exceeds 30 ℃. The heat damage caused by the high temperature environment of the deep well causes the serious deterioration of the mining operation conditions. According to investigation, the heat source of the high-temperature mine mainly comes from the rock temperature of the wall surface of the roadway. Miners working in high-temperature environment for a long time can cause metabolism disorder, reduce working efficiency and even heatstroke, and workers in important working posts can directly cause mine accidents if the workers have heatstroke.

(1) The traditional mine cooling usually adopts a ventilation mode, but the temperature of a mine roadway is difficult to effectively solve, when the air quantity is large, the cost is not economically saved, and the air flow easily brings dust and flies, so that the environment is polluted.

(2) When the refrigeration method is adopted for cooling, because the temperature of the rock is high, the heat exchange quantity with the roadway is large, a large amount of energy is wasted, and the cooling effect is not good due to a large amount of heat loss.

(3) In the aspect of mine cooling improvement, the heat insulation mode adopted at present is to directly mix part of heat insulation materials into concrete and spray the heat insulation materials on surrounding rocks of a roadway, but the heat insulation effect is greatly reduced and the effect is general.

(4) At present, industrial solid waste of alkaline residues is mainly treated in a surface accumulation mode, and a large amount of alkaline residues can form a 'white sea' after being deposited and cause pollution to the surrounding environment.

The invention aims to provide a solid waste heat insulation template for a deep mine tunnel and a construction method thereof, mainly aiming at a high-temperature tunnel mainly taking rock temperature.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a heat insulation device for a mine roadway and a construction method thereof, wherein the heat insulation template is prepared by utilizing high-temperature sintering of solid waste materials, has good heat insulation performance and a supporting function, can reduce solid waste discharge and reduce occupied cultivated land area, adopts 50% of anchoring pretightening force in the construction method, can solve the problems of supporting failure of high pretightening force and separation of the heat insulation template and surrounding rocks when the roadway deforms, and aims to solve the defects caused in the prior art.

In order to achieve the above purpose, the present invention provides the following technical solutions:

a thermal insulation apparatus for a mine roadway: the solid waste heat insulation template is fixedly arranged on the surrounding rock through the anchor rope and the anchor rod, the concrete layer is sprayed and covered on the outer wall of the solid waste heat insulation template, and the temperature sensor is arranged on the tunnel.

A construction method of a heat insulation device for a mine roadway comprises the following steps:

(1) according to the roadway temperature displayed by the temperature sensor, the thickness of the initial type of the solid waste heat insulation template is calculated, and the calculation formula is Q ═ KF (T1-T2), wherein Q: thickness of the initial form of the solid waste heat insulation template, K: the heat insulation coefficient of the solid waste heat insulation template, F: roadway surface area to be provided with a heat insulation device, T1: in-tunnel temperature, T2: ideal temperature in the roadway, and then preparing a solid waste heat insulation template prototype by using a solid waste material, wherein the template prototype is mainly molded according to the shape of the deep well roadway;

(2) the primary heat insulation template is placed in an environment of 1200 ℃ to be sintered at high temperature to form a heat insulation template;

(3) after the heat insulation template is arranged underground, splicing the heat insulation template according to the shape of a roadway, and fastening the spliced heat insulation template on the surface of the surrounding rock through an anchor rod and an anchor cable device;

(4) after the heat insulation template is fastened on the surface of the roadway, concrete is sprayed on the outer surface of the heat insulation template to carry out lining outer layer.

Preferably, the initial form of the solid waste heat insulation template in the step (1) is formed by combining water, alkaline residue, a foaming agent and a foam stabilizer according to a certain proportion.

Preferably, the ratio of the water to the caustic sludge is 7: and 3, the foaming agent and the foam stabilizer respectively account for 0.2-0.4 percent of the total mass of the water and the alkaline residue.

Preferably, the heat insulation template in the step (2) is verified by multiple tests, the strength of the heat insulation template can reach 30MPa-60MPa, and the heat conductivity coefficient is 0.2-0.3.

Preferably, the intermediate anchor rods on the two sides of the roadway in the step (3) are only 50% of pretightening force.

The beneficial effect of adopting above technical scheme is: the invention relates to a solid waste heat insulation device for a deep mine tunnel and a construction method thereof, wherein a heat insulation template is prepared by high-temperature sintering of solid waste materials, the template has good heat insulation performance and a supporting function, the solid waste discharge can be reduced, the occupied cultivated land area is reduced, 50% of anchoring pretightening force is adopted in the construction method, the problems of supporting failure of high pretightening force and separation of the heat insulation template and surrounding rocks when the tunnel is deformed can be solved, the initial form of the solid waste heat insulation template in the step (1) is formed by combining water, alkaline residue, a foaming agent and a foam stabilizer according to a certain proportion, the alkaline residue waste materials are used for manufacturing heat insulation facilities, the solid waste discharge is reduced, the resource recycling is realized, and the proportion of the water to the alkaline residue is 7: 3, the foaming agent and the foam stabilizer respectively account for 0.2-0.4% of the total mass of the water and the alkaline residue, and the heat insulation template with excellent performance can be prepared under the proportion, the strength of the heat insulation template in the step (2) can reach 30-60 MPa through multiple tests, the heat conductivity coefficient is 0.2-0.3, the heat insulation template has good heat insulation performance and a supporting function, the anchor rod in the middle of two sides of the roadway in the step (3) is only 50% of pretightening force, and the method ensures that the heat insulation template is always fastened with the surrounding rocks of the two sides, so that the problems that the anchor rod with high pretightening force fails due to deformation of the roadway and the heat insulation template is separated from the surrounding rocks can be effectively prevented.

Drawings

FIG. 1 is a schematic view of a heat insulating apparatus for a mine roadway according to the present invention;

FIG. 2 is a flow chart of a construction method of the heat insulation apparatus for mine roadways of the present invention;

wherein, 1, anchor cable; 2. an anchor rod; 3. surrounding rocks; 4. solidifying waste heat insulation templates; 5. a concrete layer; 6. a roadway; 7. a temperature sensor.

Detailed Description

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1-2 show a specific embodiment of the present invention: a thermal insulation apparatus for a mine roadway comprising: anchor rope 1, stock 2, country rock 3, useless thermal-insulated template 4, concrete layer 5, tunnel 6, temperature sensor 7 admittedly, tunnel 6 sets up inside country rock 3, and useless thermal-insulated template 4 that admittedly passes through anchor rope 1 and the fixed setting of stock 2 on country rock 3, and concrete layer 5 sprays to cover on useless thermal-insulated template 4's outer wall admittedly, and temperature sensor 7 sets up on tunnel 6, temperature sensor 7's model is pt 100.

A construction method of a heat insulation device for a mine roadway comprises the following steps:

(1) according to the roadway temperature displayed by the temperature sensor, the thickness of the initial type of the solid waste heat insulation template is calculated, and the calculation formula is Q ═ KF (T1-T2), wherein Q: thickness of the initial form of the solid waste heat insulation template, K: the heat insulation coefficient of the solid waste heat insulation template, F: roadway surface area to be provided with a heat insulation device, T1: in-tunnel temperature, T2: ideal temperature in the tunnel, then use solid waste material preparation solid useless thermal-insulated template prototype, the template prototype mainly carries out the shaping according to the shape of deep well tunnel 6, and the prototype of solid useless thermal-insulated template is formed by water, alkali sediment, foamer and foam stabilizer according to certain proportion combination, and the proportion of water and alkali sediment is 7: 3, the foaming agent and the foam stabilizer respectively account for 0.3 percent of the total mass of the water and the alkaline residue;

(2) the primary heat insulation template is sintered at high temperature under the environment of 1200 ℃ to form the heat insulation template, and the strength of the heat insulation template can reach 45MPa and the heat conductivity coefficient is between 0.25 through multiple times of test verification;

the heat insulation template not only has a heat insulation function, but also has a certain supporting function;

(3) after the heat insulation template is arranged underground, splicing the heat insulation template according to the shape of a roadway, wherein the spliced heat insulation template is fastened on the surface of surrounding rock through anchor rods and anchor cable devices, and the anchor rods between two sides of the roadway are 50% of pre-tightening force;

(4) after the heat insulation template is fastened on the surface of the roadway, concrete is sprayed on the outer surface of the heat insulation template to carry out lining outer layer.

The invention relates to a heat insulation device for a mine roadway and a construction method thereof, wherein a heat insulation template is prepared by sintering solid waste materials at a high temperature, the template has good heat insulation performance and a supporting function, the solid waste discharge can be reduced, the occupied cultivated land area is reduced, 50% of anchoring pretightening force is adopted in the construction method, the problems of supporting failure of high pretightening force and separation of the heat insulation template and surrounding rocks when the roadway deforms can be solved, the initial form of the solid waste heat insulation template in the step (1) is formed by combining water, alkaline residue, a foaming agent and a foam stabilizer according to a certain proportion, the alkaline residue waste materials are used for manufacturing the heat insulation facility, the solid waste discharge is reduced, the resource recycling is realized, and the proportion of the water to the alkaline residue is 7: 3, the foaming agent and the foam stabilizer respectively account for 0.2-0.4% of the total mass of the water and the alkaline residue, and the heat insulation template with excellent performance can be prepared under the proportion, the strength of the heat insulation template in the step (2) can reach 30-60 MPa through multiple tests, the heat conductivity coefficient is 0.2-0.3, the heat insulation template has good heat insulation performance and a supporting function, the anchor rod in the middle of two sides of the roadway in the step (3) is only 50% of pretightening force, and the method ensures that the heat insulation template is always fastened with the surrounding rocks of the two sides, so that the problems that the anchor rod with high pretightening force fails due to deformation of the roadway and the heat insulation template is separated from the surrounding rocks can be effectively prevented.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.