Abstract
The known cooling methods for the high-temperature operating environment of a mine mainly include ventilation, refrigeration, heat insulation, and individual protection. Among them, the superior performance and wide application of the heat insulation materials have attracted the attention of the coal mining industry. In this paper, three types of mineral insulation materials were prepared using basalt fiber, glass fiber, vitrified microbeads in combination with cement, sand, high-strength ceramsite, water, etc. In addition, the thermal conductivity and compressive strength of the prepared specimens were assessed. The results show that the test specimen containing basalt fiber had a great thermal insulation effect and achieved the required compressive strength. Furthermore, according to the COMSOL simulation results, the test specimen containing basalt fiber had a better thermal insulation effect than the ordinary concrete materials. Therefore, the research results of this article have guiding significance to search for new mine thermal insulation materials.
Highlights
As the main energy source of China, coal has made great contributions to the long-term development of industry
From the thermal conductivity and compressive strength, it can be seen that the performance of the test specimen XX containing basalt fiber is more suitable as a thermal insulation material for mining
This is because the thermal conductivity of the test specimen XX45 mine thermal insulation material is relatively small, which greatly prevents the heat of the surrounding rocks from being dissipated into the roadway
Summary
Basalt fiber basic parameter table.nonform: chopped strands; toxic; Physical basic performance: environmentally friendly and non- Map Physical Map. ≤3.0 g/cm form: chopped strands; monofilament diameter: 7~17 μm; basic performance: environmentally friendly nonfiber length: 0.3and or 30.6 cm; friendly and basic performance: environmentally basalt fiber. 0.6raw cm;elongation: Glass fiber is made oflength: natural0.3 ores materials, mixed. Glass fiber is made of natural ores as raw materials, mixed with substances such as soda ash and breaking strength: are force [36].
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