Results 61 to 70 of about 93,033 (262)
Research on Precise Identification of Rock Strength Based on Bolt Drilling Parameters
Energy Science &Engineering, EarlyView.Drilling detection test platform. ABSTRACT During roadway excavation, the presence of weak interlayers and fractured rock masses significantly affects roof stability. To achieve timely and effective roadway support, it is crucial to identify and predict different rock types based on drilling signals from roof bolters.
Qiang Zhu +4 more
wiley +1 more source
Shock and Vibration, 2015 This paper presented a case study of the failure mechanisms and support design for deep composite soft rock roadway in the Yangcheng Coal Mine of China. Many experiments and field tests were performed to reveal the failure mechanisms of the roadway.
Bangyou Jiang +4 more
doaj +1 more source
LOW-COST REMOTE WEATHER INFORMATION SYSTEM PHASE I AND PHASE 2 [PDF]
, 2018 Remote Weather Information Systems (RWIS) are an important part of deciding maintenance activities and scheduling. However, the cost of RWIS limits the number of systems that can be deployed.
Connor, Billy
core
Energy Science &Engineering, EarlyView.Aiming at the difficulties in accurately calculating the movement and deformation of small‐sized, deep‐buried dams with a significant height‐to‐depth ratio in deep fully mechanized caving mining, this study proposes to separate the analysis of surface and dam deformation.
Zhang Feng +7 more
wiley +1 more source
Energy Science & Engineering, 2020 To control roadway under small abandoned mines in ultrathick coal seam, this paper analyzed its deformation and failure characteristics. As a result, the roadway occurred roof leakage and right rib extrusion. Based on above characteristics, the secondary
Yang Tai +4 more
doaj +1 more source
Meikuang Anquan, 2020 In view of the problem that the surrounding rock is disturbed severely and the pressure relief deformation is difficult to control in the support technology of pressure relief hole of deep high-stress roadway, this paper takes Beijing Changgouyu Mine as
WANG Jie, REN Jie
doaj +1 more source
Performance Evaluation of Open Graded Base Course with Doweled and Non-Doweled Transverse Joints [PDF]
, 2010 The objectives of this study were to investigate the performance of 20-year old doweled/non-doweled and dense-graded/permeable base test sections on three concrete pavement segments in Wisconsin: USH 18/151 in Iowa and Dane counties, STH 29 in Brown ...
Crovetti, James +2 more
core +1 more source
Energy Science &Engineering, EarlyView.With the advancement of coal mining technology driving the development of working faces toward increased mining heights and extended lengths, the enlargement of face dimensions has led to expanded overlying strata failure zones and intensified ground pressure manifestations. Consequently, traditional methods for determining hydraulic support resistance
Chen Gong +5 more
wiley +1 more source
Coupling support technique for coal roadway under double gobs in close coal seams
Energy Science & EngineeringIn the process of lower coal roadway support under double gobs in close coal seams, there are problems such as the whole destruction of the lower coal seam and the intermediate strata, the thin roof of the lower coal roadway with the smaller support ...
Xiaoyu Wu +4 more
doaj +1 more source
Guidelines for the Use of Synthetic Fluid Dust Control Palliatives on Unpaved Roads [PDF]
, 2017 The amount of small soil particles, dust, lost from typical unpaved roads to fugitive dust is staggering. A 1 km stretch of unpaved road can contribute over 2400 kg of dust to the atmosphere (4.2 ton/mile) in a typical 3-month summer season.
Barnes, David, Connor, Billy
core