Research on "theory of force-center" based on failure characteristics of different roadway sections and its application.

In high-stress deep mines prone to rock bursts, the significant deformation of roadway surrounding rock remains a critical scientific issue that urgently requires resolution. In this study, through theoretical analysis and numerical simulations, the failure mechanisms of different roadway sections are investigated, and the "force-center theory" is proposed. This hypothesis is validated by industrial experiments, yielding several key findings: (1) For any cross-sectional shape of the roadway, a unique peripheral circle will be formed, and the damaged area of the roadway section is mainly oriented towards the center of the peripheral circle.

Effect of Sasobit/Waste Cooking Oil Composite on the Physical, Rheological, and Aging Properties of Styrene-Butadiene Rubber (SBR)-Modified Bitumen Binders.

The modifying effects of polymer on bitumen low-temperature performance are substantially compromised by the thermal breakdown of styrene-butadiene rubber (SBR) polymer during bitumen mixture production operations. The efficacy of the utilization of Sasobit/waste cooking oil (Sasobit/WCO) as a warm-mix additive has been demonstrated in mitigating the adverse consequences of thermal aging on SBR-modified bitumen binder (SB) while preserving the binder's original performance characteristics. However, few studies have been conducted to further investigate the rheological properties and aging resistance of SB modified with Sasobit/WCO compounds.

Study on roof movement law of local filling mining under peak cluster landform.

The strip structure filling mining technology is suggested in response to the environmental issues such as surface subsidence and landslides brought on by the mining of 11,071 working faces in a mine in Guizhou. The mining technology system is studied through indoor testing, numerical simulation, and engineering monitoring. According to theoretical study, the filling strip can be steadily loaded and its value doesn't exceed 10 m when the width of the filling strip and the width of the filling interval are set to be equal.

Bilateral Pulmonary Enteric Adenocarcinoma on FDG PET/CT.

Pulmonary enteric adenocarcinoma(PEAC) is a rare variant of pulmonary adenocarcinoma. We herein report FDG PET/CT findings of PEAC in a 76-year-old woman. The images showed widespread opacities in both lungs with intense FDG uptake.