Mines with exceptionally low-strength roof (UCS <3,500 psi and CMRR <40) are much more likely to struggle with roof falls than other mines. Weak roof is a particular problem for many room and pillar mines in the Midwestern and Northern Appalachian coal basins. Traditional roof support techniques are often not up to the challenge at these operations. This paper focuses on two mines, one operatin...

Green roofs are constructed ecosystems that provide ecosystem services in urban environments. Shallow substrate green roofs subject the vegetation layer to desiccation and other environmental extremes, so researchers have evaluated a variety of stress-tolerant vegetation types for green roof applications. Lichens can be found in most terrestrial habitats.  They are able to survive extremely har...

One of the main concerns of an underground coal mining engineer is the safety and stability of the mine. One way that the safety and stability can be ensured is to know and understand the coal mine geology and how it reacts to the mining process. One technique that has shown a lot of success in the coal mining industry for geologic technical evaluation purposes is the coal mine roof rating (CMR...

Transportation is one of the important fields carbon emission. Promoting Carbon Peak in transportation industry a key point to accelerate green and low-carbon transformation promote high-quality development industry. The sector covers wide range fields, there are many coordination departments. local authorities still lack strong grasp carrying out work. It urgent further improve system mechanis...

Abstract Current urban development practices are predicted to be largely unsustainable, placing an increasing burden on surrounding ecological systems. One mitigation effort involves expanding green infrastructure and alleviating challenges by building in cooperation with processes. Cities investing large-scale projects such as parks, bioswales (roadside plantings), roofs. Recently, scientists ...