1980年开始广泛采用玻璃钢卷材作巷道防护层。1980年用这种材料护巷40.7km,1981年56km,1982年82.9km,1983年94km。 在物理—力学指标方面,玻璃钢卷材制成的防护层比用传统材料——木材和钢筋水泥制成的防护层要优越得多。每1m~2玻璃钢卷材的重量是1kg,强度不小于80kPa,寿命可达6～8年。根据苏联国家标准17088-71,玻璃钢卷材为难燃材料。 Beginning in 1980, extensive use of glass fiber reinforced plastic coil for roadway protection. In 1980, 40.7km of this material was used to protect the roadway, 56km in 1981, 82.9km in 1982 and 94km in 1983. In terms of physical and mechanical properties, the protective layer made of fiberglass coil is much superior to the protective layer made of traditional materials - wood and reinforced concrete. Each 1m ~ 2 FRP coil weight is 1kg, the strength of not less than 80kPa, life expectancy of up to 6 to 8 years. According to the Soviet Union national standard 17088-71, FRP coils are flame retardant materials.