Results 71 to 80 of about 5,737 (227)

Analysis of Mechanical Properties of Coal Pillar Dam in Mine Goaf

Meikuang Anquan, 2020
To study the mechanical properties changes and deformation of the underground coal pillar dam body in the mine goaf in the underground working environment, the Lijiatun Coal Mine is taken as the research background, and the laboratory similar simulation ...
LI Yumeng, WANG Wencai
doaj   +1 more source

A study on collapse law of soil cave with different rainfall rates based on FLAC3D

Carsologica Sinica, 2022
Frequent heavy rainfall can lead to large-scale collapse of karst soil caves. Quaternary strata are widely distributed in the karst area of Lingui district, Guilin City, among which the subsidence area of the silty clay overlay with a one-dimensional ...
Mingming XUE, Xuejun CHEN, Yu SONG, Xiaotong GAO, Hui LI, Xiaohui GAN, Mingzhi ZHANG, Zongyuan PAN, Lingming TANG   +8 more
doaj   +1 more source

Geohazards analysis of Pisa tunnel in a fractured incompetent rocks in Zagros Mountains, Iran. [PDF]

, 2013
The Pisa 2 tunnel with 740 m in length and 20° N trend is located along the Kazerun fault zone in Simply Folded Belt of Zagros, Iran. This tunnel has been excavated in the fractured incompetent marl layers with high expansive pressure of up to 2 kg/cm2 ...
B Pradhan, B Pradhan, B Pradhan, B Pradhan, B Pradhan, B Pradhan, Biswajeet Pradhan, C Baker, CAE O’Brien, D Hatzfeld, E Hoek, EE Wahlstrom, FGH Blyth, GA James, HO Safari, HO Safari, Hojjat Ollah Safari, Hossein Amid, M Alavi, M Berberian, M Berberian, MH Ayazi, N McQuarrie, NL Falcon, S Pirasteh, S Pirasteh, SA Ali, Saeid Pirasteh, XP Qi, ZT Bieniawski   +29 more
core   +1 more source

Tunnel excavation based on FLAC3d numerical simulation

Academic Journal of Science and Technology
 A semi-circular arch straight wall tunnel with a span of 10m, a side wall height of 5m and a buried depth of 500m is excavated in a class IV surrounding rock. Assuming that the surrounding rock is an ideal elastoplastic material, the following problems are analyzed by using finite element or finite difference method: the arch roof subsidence and the ...
Shihao Guo, Bangbang Mu, Mingyang Zhao, Huiyan Wang   +3 more
openaire   +1 more source

Study on the Energy Evolution and Stability of Roadway Surrounding Rock Under the “Simultaneous Mining–Driving” Condition

Energy Science &Engineering, Volume 14, Issue 4, Page 2225-2247, April 2026.
Based on theoretical analysis, the energy‐evolution behavior of the surrounding rock at various depths on the solid‐coal side of the 221303 material roadway during the “advancing‐toward‐mining” process was first clarified. Numerical simulations were then performed to validate and elaborate on the theoretical results.
Wei Zhang, Peilin Gong, Kang Yi, Guang Wen, Libin Bai, Lizhu Liu, Chen Gong, Peng Li   +7 more
wiley   +1 more source

Study on Damage Characteristics and Evolution Law of Macro‐Meso Structure of Surrounding Rock Under Mining Stress

Energy Science &Engineering, Volume 14, Issue 4, Page 2024-2039, April 2026.
Investigating the differential impact of mining stress on roadways, we find that in horizontally stressed environments, the inner surrounding rock exhibits more pronounced macro‐meso damage compared to the outer side. ABSTRACT The control of surrounding rocks in dynamic pressure roadways has consistently been one of the challenging predicaments in the ...
Fan Lei, Chang Jucai, Yuan Chao, Wu Hai, Chen Haoran   +4 more
wiley   +1 more source

Surface Movement and Deformation Law in Downward Mining of Complex Geomorphology

Meikuang Anquan, 2020
To study the law of surface movement and deformation in downward mining under complex landform conditions, combined with the engineering geological conditions of a coal mine in Shanxi Province, a combination method of theoretical analysis and FLAC3D ...
DONG Cancan, LYU Yiqing, LIU Zhihui, ZHENG Shaoduo
doaj   +1 more source

Int J Min Sci Technol [PDF]

Bumps and other types of dynamic failure have been a persistent, worldwide problem in the underground coal mining industry, spanning decades. For example, in just five states in the U.S. from 1983 to 2014, there were 388 reportable bumps.

core   +3 more sources

RHEOLOGICAL CHARACTERIZATION OF A CLAY FORMATION FROM DRIFTS EXCAVATION : ELASTIC AND ELASTOPLASTIC APPROACH [PDF]

, 2006
International audienceAn extensive scientific programme has been carried out by Andra (French Agency in charge of radioactive waste management) for investigating feasibility of High Level Activity Waste disposal in deep geological formation.
Armand, Gilles, Kazmierczak, Jean-Bernard, Renaud, Vincent, Wileveau, Yannick   +3 more
core   +1 more source

Mechanical property variation mechanisms of granite subjected to real‐time high temperatures and subsequent cooling treatment

Deep Underground Science and Engineering, Volume 5, Issue 1, Page 277-295, March 2026.
This study investigates the coupled thermo‐mechanical behavior of granite during heating and cooling through a combination of laboratory tests and finite element analysis. The thermal conductivity, mineral composition, mass loss rate, micro‐crack observation, and thermal fracture characteristics of granite under various temperature conditions are ...
Rui Pang, Dehao Meng, Thomas Frühwirt, Hao Liu, Yanan Zhao, Qingyou Zhu, Wengang Dang, Mohamed Ismael, Fei Wang   +8 more
wiley   +1 more source