Results 101 to 110 of about 479,017 (202)

Research and application of spatial distribution law of additional compressive stress field in surrounding rock of bolt support

Meitan xuebao
The application of coal mine roadway bolt support has been widely adopted. The additional stress field due to the support action of the bolts on the surrounding rock is crucial for quantifying support parameters and optimizing support schemes.
Yuantian SUN, Shang WANG, Guichen LI, Changliang HAN, Haoran HAO, Jinghua LI, Haisen ZHAO   +6 more
doaj   +1 more source

Surrounding rock control technology of deep large section composite roof mining roadway

Meikuang Anquan, 2022
In view of the problems of roof collapse and difficult roof support in composite roof roadway, the deformation and instability mechanism of composite roof is analyzed, and the cooperative support technology of long and short anchor cables is proposed.
openaire   +1 more source

Pressure relief and control technology for gob-side roadway in soft and thick coal seam in kilometer-deep coal mine

Meikuang Anquan
In order to solve the control problems of deformation and failure in soft and thick coal seam in kilometer-deep coal mine, the gob-side roadway in deep loose and weak thick coal seam is taken as the object. Based on on-site investigation and measurement,
Wenwei MA, Wenxu LIANG
doaj   +1 more source

Research on the mechanism of deformation and instability of surrounding rock in goaf under dynamic loading and the mechanism of active coordinated control

Frontiers in Earth Science
Dynamic loading from mining activities and surface movements can significantly affect the stability of surrounding rock in goafs, leading to large-scale deformations or even collapses of overlying strata, which may trigger extensive mining disasters and ...
Kun Xu, Kun Xu, Yanlong Chen, Ming Li, Yafei Zhang, Pengjiao Zhang, Tian Chen   +6 more
doaj   +1 more source

Research on Control Technology of Large-Section Water-Bearing Broken Surrounding Rock Roadway

Applied Sciences
With the increasing depth of mining operations, the geological conditions of deep roadways have become increasingly complex. Among these complexities, the issues of fractured zones and groundwater are particularly critical, significantly contributing to ...
Wenqing Peng, Shenghua Feng
doaj   +1 more source

Growing an island: Okinotori [PDF]

, 2011
The UN Law of Sea defines an island as “a naturally formed area of land, surrounded by water, which is above water at high tide.” However, according to the same international law, not every kind of island engenders the same legal effects: “rocks which ...
De Meyer, Dirk
core  

Surrounding rock control technology of preparation roadway under double-wing mining

Meitan kexue jishu
Aiming at the problem of surrounding rock instability and serious deformation and failure of the preparation roadway in the double-wing mining area, which is affected by the mining superimposed support stress, the stress control technology of the surrounding rock of the preparation roadway in the double-wing mining area is carried out.
Kun WANG, Xiangrui MENG, Guangming ZHAO, Xiang CHENG, Minjie QI, Shikui ZHU   +5 more
openaire   +1 more source

Stability analysis and optimization design of roadway surrounding rock under multiple factors

矿业科学学报
To address the issue of severe mine pressure manifestations and difficult-to-control deformation in deep coal seam roadways, an orthogonal numerical simulation experiment was conducted based on the Kastner formula.This experiment examined five factors ...
LIU Hongtao, ZHOU Guangdong, HAN Zijun, HAN Zhou, LUO Zilong, CHENG Wencong, QIAO Zhongjin   +6 more
doaj   +1 more source

Calculation of periodic roof weighting interval in longwall mining using finite element method [PDF]

, 2013
B Singh, Behdeen Oraee-Mirzamani, BHG Brady, E Hoek, E Hoek, GSP Singh, Kamran Goshtasbi, M Monjezi, Mehran Gholinejad, ML Jeremic, Navid Hosseini, PR Sheorey, R Trueman   +12 more
core   +1 more source

Stability analysis and control countermeasures of surrounding rock of gob-side entry formed by roof-cutting in inclined coal seams

Energy Exploration & Exploitation
The stability of the surrounding rock in the inclined coal seam stope is crucial for the safety of the gob-side entry. In this article, we systematically analyze the surrounding rock stability of the gob-side entry formed by roof-cutting (GEFR) in an ...
Enze Zhen, Shizhuo Dong, Xiaowei Xu, Yajun Wang, Mengxiang Wang   +4 more
doaj   +1 more source