The increase of roadway width can result in significant bending subsidence in the roof, and large height roadway can cause coal wall buckling and even spalling, which significantly affects the stability of the surrounding rock of the roadway, and brings great difficulties to roadway support.
Wilhelm and Ritz [ 16] noted that the effect of residential proximity to heavy traffic roadways on preterm birth was greater for those whose third trimester of pregnancy fell in autumn/winter.
With great stretches of roadway raised on high concrete stilts, and long tunnels disappearing into the side of hills, it looked amazing.
The stress of the bolts in the whole section of the roadway with traditional bolt-mesh supporting was uneven, where the stress of the vault of roadway was great, and that of the two sides of roadway and floor bolt was small.
Surfaces such as roadways are great absorbers of the sun's incoming radiation.
("In theory, solar roadways look great — let's just cover all the roads with solar cells — but it's a very energy-intensive way to build a road, and you're unlikely to get that energy back").
A proposal by the Obama administration that would grant Mexican truckers greater access to Texas roadways -- and far beyond -- would be a boon to businesses in the state, supporters say.
The rock deformation has following features: loading fast, high pressure, high deformation velocity, large amount of deformation, and long deformation time, which caused a great difficulty for the roadway support.
Effects of residential proximity to roadways were greater in females, as in our study.
While somewhat counterintuitive, this negative association may suggest that PM10 emissions from roadways with greater heavy-goods vehicle traffic exhibit differences in composition that influence GSH OP.
