Effective control of deformation failure surrounding rock in deep roadway has become an important prerequisite for the safe and efficient development coal resources. In this study, field measurement study area’s in-situ stress was carried out specific engineering geological conditions KCM −967 m level west-wing main track roadway. The roadway’s full-section features were summarized analyzed, no...

To study the deformation and failure mechanisms of soft rock mining roadways, 1506 return airway Anyang Coal Mine is taken as engineering background. Based on limit analysis theory, a model based rigid slider system constructed to assess surrounding roadway. The formulas for calculating self-weight power in velocity discontinuity line roadway, work pressure, energy dissipation rate are derived,...

In advanced driver assistance systems and autonomous driving vehicles, many computer vision applications rely on knowing the location of the vanishing point on a horizon. The horizontal vanishing point’s location provides important information about driving environments, such as the instantaneous driving direction of roadway, sampling regions of the drivable regions’ image features, and the sea...

The coal information system based on the electric power line was put forward after analyzing briefly the structure of mine distribution power network in roadway underground, connected with communication and monitoring networks existed already. The system uses a multi-level distributed bus network structure, roadway where harsh conditions, using a combination of multi-carrier and spread spectrum...

In advanced driver assistance systems and autonomous driving vehicles, many computer vision applications rely on knowing the location of the vanishing point on a horizon. The horizontal vanishing point’s location provides important information about driving environments, such as the instantaneous driving direction of roadway, sampling regions of the drivable regions’ image features, and the sea...

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...