To address the problem of instability and failure 11,514 return air roadway caused by dynamic pressure in Jinhuagong Coal Mine, this study uses theoretical analysis, numerical simulation, field test methods. The disturbance deformation mechanism surrounding rock control technology for during face-to-face mining excavation are analyzed. results show that causes regional asymmetric multiple super...

In this paper, taking a typical roadway in broken and soft rock strata No. 10 Mine of Pingdingshan coal field as an example, the deformation failure mechanism mass was deeply analyzed based on testing. Then technology high-strength prestressed bolt-grouting support, such new combined grouting bolt, hollow anchor cable, were developed. Based this, repair support scheme using designed for on-site...

This research evaluates the accuracy of demand forecasts using a sample of recently-completed projects in Minnesota and identifies the factors influencing the inaccuracy in forecasts. Based on recent research on forecast accuracy, the inaccuracy of traffic forecasts is estimated as the difference between forecast traffic and actual traffic, standardized by the actual traffic. The analysis indic...

OBJECTIVE We evaluated the cost-effectiveness of a package of roadway modifications in New York City funded under the Safe Routes to School (SRTS) program. METHODS We used a Markov model to estimate long-term impacts of SRTS on injury reduction and the associated savings in medical costs, lifelong disability, and death. Model inputs included societal costs (in 2013 US dollars) and observed sp...

Collisions between vehicles and pedestrians continue to occur at a high rate each year, resulting in several thousand pedestrian injuries and deaths in the United States alone. In addition to the natural environmental factors (i.e. precipitation, lighting, temperature, etc.), factors related to the infrastructure in which pedestrians walk impact the safety performance of a given roadway segment...

This paper provides detailed analysis and simulation for explol'ing the impact of out-of-band emissions (OOBE) of adjacent wireless services to the Sirius XM digital satellite radio service. Based on an extensive analysis of interference from vehicles with mobile cellular users in realistic roadway conditions, we propose proper methods for determining out of band emission spectral masks that sh...