Novel roadway sprayed concrete thermal insulation layer and using method thereof

Abstract

The invention discloses a novel roadway sprayed concrete thermal insulation layer and a using method thereof. The novel roadway sprayed concrete thermal insulation layer comprises a heat insulation layer system, the heat insulation layer system comprises a heat insulation layer body, the heat insulation layer body is made of concrete, and expanded perlite material in the concrete accounts for 75-80 parts of the total weight of the concrete, and theconcrete comprises the following raw materials: pebble, wherein ceramsite in the pebble accounts for 65-75 parts of the total weight of the pebble;cement, wherein the coal ash material in the cement accounts for 55-65 parts of the total weight of the cement, and a water reducing agent accounts for 1.0-1.5 parts of the total weight of the cement;the heat insulation layer system comprises a temperature sensor, a buzzer and a display screen. By designing the roadway thermal insulation layer, after the roadway thermal insulation layer is sprayed in a roadway, underground heat can be greatly isolated to the outer side of surrounding rock, heat generated on the inner side of the roadway is reduced, the mode is environmentally friendly, energy-saving and high in cost performance, compared with a passive cooling mode, the generated heat is little, and the roadway thermal insulation layer is beneficial to the power load rate in the roadway.

Description

technical field [0001] The invention relates to the field of cooling in coal mines, in particular to a novel roadway shotcrete heat insulation layer and its application method. Background technique [0002] Although my country has a large amount of coal reserves, due to the huge annual coal consumption and high mining intensity, the current shallow coal mine resources are increasingly depleted, gradually entering the deep mining stage, and the mining depth is increasing year by year showing a normal trend. At present, the average depth of coal mine mining in large and medium-sized mining areas has reached 456m, of which the depth in the eastern and northern China reaches 647m, and the mining depth of coal mines is gradually increasing at a rate of 8-12m every year, while the eastern mines are increasing at an average annual rate of 10-25m. The speed continues to increase, and the temperature of the rock formations gradually rises, and the temperature of the mining face of so...

AI Technical Summary

Problems solved by technology

The high temperature in mines is also likely to cause major mine safety accidents such as toxic heat waves, sulfur dust explosions, and gas explosions

The long-term high-temperature working environment will not only endanger the physical and mental health of workers, but also cause certain damage to the mechanical and electrical equipment in underground construction. If the temperature is too high, some mechanical equipment will fail or even stop running due to difficulty in heat dissipation, which will affect the construction progress. Relevant statistics show that the temperature Every 1°C increase will at least double the failure rate of underground construction machinery and equipment