Results 41 to 50 of about 749,321 (144)

Mechanism of Roadway Floor Heave Controlled by Floor Corner Pile in Deep Roadway under High Horizontal Stress

, 2021
In order to overcome the support difficulty of serious floor heave caused by rock burst, with the floor heave of ventilation roadway in Hegang Xing An Coal Mine as the engineering background, the treatment scheme of the concrete-filled steel tube corner ...
Zhiying Lu, Xinchao Kang, Dongming Guo
core   +1 more source

Study on layout parameters of floor multifunctional roadway in deep ultra-thick coal seams under strong mining disturbance

Gong-kuang zidonghua
Deep ultra-thick coal seam mining causes severe disturbance, and the surrounding rock of floor multifunctional roadways exhibits significant deformation and instability.
Zhang Yachao, Liu Zhaoxing, Chen Dongliang, Liu Yukai, Dou Guidong, Xiao Fei, Yan Bin, Shang Fa, Yang Kai   +8 more
doaj   +1 more source

Research on Optimal Width of Coal Pillars in Both Sides of Abandoned Mining Areas and Tunnel Control Technology

Energy Science &Engineering, Volume 14, Issue 8, Page 3625-3637, August 2026.
This study primarily investigates the optimal width for coal pillar retention in both sides of the worked‐out face section. Taking the 42201 haulage roadway of the 42201 working face at Shengxin Coal Mine as the primary research target, it analyses the optimum width for coal pillar retention through theoretical calculations, numerical simulations, and ...
Shuaifeng Yin, Kanglei Han, En Wang, Yitao Yan, Xubo Zhao   +4 more
wiley   +1 more source

The House Appropriations Committee Surveys & Investigations Staff and the Arc of Congressional Competence

Legislative Studies Quarterly, Volume 51, Issue 3, August 2026.
ABSTRACT This article follows the arc of congressional competence through the development and decline of the House Appropriations Committee (HAC) Surveys & Investigations (S&I) staff, an enduring oversight unit whose investigations were unobserved by design. S&I was quietly reorganized out of existence in December 2024. Why? What, if anything, is lost?
Matthew Dull
wiley   +1 more source

Frost heave in compressible soils [PDF]

, 2010
We develop a mathematical model of frost heave in compressible soils based on a morphological instability of the ice–soil interface. The theory accounts for heave and soil consolidation,while avoiding the frozen fringe assumption.
Sander, Graham, Style, Robert, Peppin, Stephen, Majumdar, Apala   +3 more
core  

Study on Floor Heave Characteristics and the Control Method of Gob-Side Entry Driving in Weakly Cemented Soft Rock

, 2023
Aiming at the problems of large deformation, long duration, and difficult control of floor heave in gob-side entry driving in weakly cemented soft rock, this paper takes the weakly cemented soft rock mining area in Western China as the engineering ...
Fenghai Yu, Tao Zhang, Xuerui Yang, Bo Wang, Xin Zhao, Chengfu Ma   +5 more
core   +1 more source

The regularity of asymmetric evolution of stress and displacement fields in surrounding rock during horizontal stratified mining of steeply inclined, extra-thick coal seams

Frontiers in Materials
In order to address the problems of gas abnormal emission and roadway instability induced by asymmetric stress evolution of surrounding rock during horizontal layered mining of steeply inclined and extra-thick coal seams, this study takes the +575 m ...
Jun Liu, Jun Liu, Jun Liu, Yongchao Dang, Chunyu Ji   +4 more
doaj   +1 more source

Shear Slip Deformation Mechanism and Model Construction of Gently Inclined Rock Layer

Engineering Reports, Volume 8, Issue 6, June 2026.
Asymmetric large deformation in layered soft rock tunnels describes a condition where displacements on either side of the tunnel's central axis plane are inconsistent, with one side exhibiting minor deformation and the other significant movement.
Yixuan Liu
wiley   +1 more source

Influência dos parâmetros geométricos de uma plataforma semissubmersível no movimento de heave [PDF]

, 2015
TCC (graduação) - Universidade Federal de Santa Catarina. Campus Joinville. Engenharia Naval.O presente trabalho tem como objetivo estudar as respostas em heave do movimento de uma plataforma semissubmersível.
Lopes, Pedro Paludetto Silva de
core  

Fine-grained analysis and application of mining-induced roadway deformation based on spatiotemporal 4D point clouds

Meitan xuebao
To address the problems of complex wiring and installation, low spatial coverage of single-point monitoring, and limited accuracy under non-uniform deformation in conventional roadway surrounding rock deformation monitoring, a technical framework is ...
Zhuli REN, Ruifu YUAN, Hongyang ZHU, Shen WANG, Lei ZHAO, Jinxiang QI   +5 more
doaj   +1 more source