Results 81 to 90 of about 33,010 (259)

Mechanical Response of Soft Rock Roadways in Deep Coal Mines Under Tectonic Stress and Surrounding Rock Control Measures

Applied Sciences
This study focuses on how rocks respond mechanically and how to keep them stable when soft rock roadways are under deep tectonic stress. It does this through a combination of theoretical analysis, numerical simulations, and field applications. We created
Anying Yuan, Chaofan Xu, Xin Tian
doaj   +1 more source

Field investigations of high stress soft surrounding rocks and deformation control

Journal of Rock Mechanics and Geotechnical Engineering, 2015
AbstractField investigations of high stress soft rock deformations show that the high stress soft rock roadway can slide with large deformation. Severe extrusion and floor heave can also be subsequently observed. The supported roadway can be locally damaged or completely fail, where the floor has a large deformation and/or is seriously damaged.
Weijian Yu, Weijun Wang, Xinyuan Chen, Shaohua Du   +3 more
openaire   +2 more sources

ChicGrasp: Imitation‐Learning‐Based Customized Dual‐Jaw Gripper Control for Manipulation of Delicate, Irregular Bio‐Products

Advanced Robotics Research, EarlyView.
Automated poultry processing lines still rely on humans to lift slippery, easily bruised carcasses onto a shackle conveyor. Deformability, anatomical variance, and hygiene rules make conventional suction and scripted motions unreliable. We present ChicGrasp, an end‐to‐end hardware‐software co‐designed imitation learning framework, to offer a ...
Amirreza Davar, Zhengtong Xu, Siavash Mahmoudi, Pouya Sohrabipour, Chaitanya Pallerla, Yu She, Wan Shou, Philip Glen Crandall, Dongyi Wang   +8 more
wiley   +1 more source

Compliant Pneumatic Feet with Real‐Time Stiffness Adaptation for Humanoid Locomotion

Advanced Robotics Research, EarlyView.
A compliant pneumatic foot with real‐time variable stiffness enables humanoid robots to adapt to changing terrains. Using onboard vision and pressure control, the foot modulates stiffness within each gait cycle, reducing impact forces and improving balance. The design, cast in soft silicone with embedded air chambers and Kevlar wrapping, offers durable,
Irene Frizza, Hiroshi Kaminaga, Philippe Fraisse, Gentiane Venture   +3 more
wiley   +1 more source

Stability control of roadway surrounding rocks under repeated mining: a case study

Scientific Reports
Repeated mining makes the deformation and failure of roadway surrounding rocks more complex than those under single-seam conditions. To address the large deformation and support failure in the 40,111 roadway of the Dafosi Coal Mine, this study combined theoretical calculations and numerical simulations to analyze the evolution of stress, displacement ...
Wang, Tong, Wang, Changcheng, Yang, Ke, Ren, Bo, Chi, Xiaolou, Fu, Qiang, Wang, Haiping   +6 more
openaire   +3 more sources

Cross‐Scale Hierarchical Targeted Delivery System Based on Small‐Scale Magnetic Robots

Advanced Robotics Research, EarlyView.
This article reviews a cross‐scale hierarchical targeted delivery system that integrates magnetic continuum robots and magnetic microrobots. By combining rapid long‐range navigation with precise microscale targeting, the system overcomes key limitations of single‐scale approaches.
Junjian Zhou, Zhiqiang Chen, Yuanbiao Ma, Zhiqiang Tang, Qianqian Wang   +4 more
wiley   +1 more source

Perivascular Matrix Densification Dysregulates Angiogenesis and Activates Pro‐Inflammatory Endothelial Cells

Advanced Science, EarlyView.
Perivascular matrix densification promotes the emergence of aberrant endothelial tip cells (ATECs) that invade and persist within fibrotic microenvironments. Using in vivo lineage tracing and a human microvessel model, this study shows that fibrous matrix cues destabilize VE‐cadherin–mediated junctions to gate TGF‐β signaling, inducing a pro ...
Jingyi Xia, William Y. Wang, Kyle A. Jacobs, Kairav Maniar, Daphne Lin, Evan H. Jarman, Daniel L. Matera, Kristen Loesel, Christopher D. Davidson, Harrison L. Hiraki, Xiaotian Tan, Eve H. Shikanov, Robert N. Kent, Carole Parent, Xudong Fan, Ariella Shikanov, Matthew L. Kutys, Brendon M. Baker   +17 more
wiley   +1 more source

Mechanical Mechanism of Surrounding Rock Failure and Stability Control for Gob‐Side Entry Driving Near an Advancing Working Face

Energy Science & Engineering
Addressing the challenges of surrounding rock control in gob‐side entry driving near an advancing working face affected by adjacent working faces and gobs, taking 5104 return airway of No.1 well in Checun Coal Mine as the background, using theoretical ...
Delong Cui, Yujiang Zhang, Shuai Zhang, Xiangye Wu, Qian Wang, Bingyuan Cui, Defu Zhu   +6 more
doaj   +1 more source

Research on collaborative control technology of “unloading and support balance” for surrounding rock of isolated roadway under the influence of dynamic pressure

Meikuang Anquan
During the mining process of deep coal mining faces, they are often affected by strong mining dynamic pressure, resulting in strong mining pressure and significant deformation and damage of the surrounding rock of the roadway.
Runzhi LI
doaj   +1 more source

Deformation Control Technology for Surrounding Rock in Soft Rock Roadways of Deep Kilometer-Scale Mining Wells

Symmetry
Deep soft rock roadways at about 1 km depth experience significant deformation due to concentrated stress ahead of the working face and dynamic loads from the hard roof layer. We propose an integrated control method that couples directional roof cutting, which interrupts stress transfer with constant resistance, and large deformation cable ...
Li Jiang, Haipeng Li, Lei Ma, Weiming Guan, Haosen Wang, Haochen Feng, Bei Zhang, Rui Wang 0152   +7 more
openaire   +1 more source