Exact(8)
In general, the deformation was small during roadway excavation period, and the effect of roadway support was good.
But in some cases (like when you're travelling during roadway rush hours), it makes a lot more sense to take the train.
When the roadway's height-width ratios are different, the stress distributions formed in the floor during roadway development are significantly different.
In case of water accumulating in the roadway during roadway repairment, the deformation of corresponding position would be intensified and expanded.
In Fig. 58a, b, the stress concentration zone generated at two side walls during roadway development overlapped with the stress concentration zone in coal pillar after coal extraction.
There have been many design practices utilised within the coal mining industry to arrive at the minimum densities of primary ground support required during roadway development.
Similar(51)
The wall-to-wall convergence and the roof-to-floor convergence during the roadway excavation period was 25 mm and 16.6 mm, respectively.
Because the stress field distributions of two kinds of arrangements are different, different measures should be taken during the roadway support.
On Oct. 19 , 1996 a Queens man was fatally injured on the Saw Mill when a tree toppled onto the roadway during a storm.
The driver of a school bus filled with children was impaled by heavy pipes and killed this morning when the bus collided with a van loaded with plumbing supplies on a busy roadway during the morning rush, the authorities said.
The stress concentration zone formed in the surrounding rocks of the roadway during its development is basically separated with the stress concentration zone formed by coalface extraction.
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