Results 91 to 100 of about 479,017 (202)

Failure characteristics and control technology of surrounding rock during roadway passing collapse column

Scientific Reports
The collapse column may result in failure of the surrounding rock during roadway excavation. It is of considerable importance to elucidate the failure characteristics and develop the corresponding control technologies for the surrounding rock. A discrete fracture mesh (DFN) and a strain-softening constitutive model are employed to simulate the ...
Ce Jia, Chaojun Fan, Sheng Li, Xiaoshuai Liu, Mingkun Luo   +4 more
openaire   +3 more sources

Failure mechanism of Mesozoic soft rock roadway in Shajihai coal mine and its surrounding rock control

International Journal of Mining Science and Technology, 2014
Abstract In view of the buckling failure caused by large deformation of Mesozoic soft rock roadway in Shajihai mining area, such as serious roof fall, rib spalling, floor heave, etc., based on the detail site investigation, theoretical analysis, mineral composition test, microstructure test, water-physical property test and field experiments were ...
Yue Yuan, Yongjian Zhu, Weijun Wang, Weijian Yu   +3 more
openaire   +1 more source

Neutron Shielding Optimization Studies [PDF]

, 2015
The IsoDAR sterile-neutrino search calls for a high neutron flux from a 60 MeV proton beam striking a beryllium target, that flood a sleeve of highly-enriched 7Li, the beta-decay of the resulting 8Li giving the desired neutrinos for the veryshort ...
Alonso, Jose, Barlow, Roger, Bartoszek, Larry, Bungau, Adriana, Conrad, Janet, Shaevitz, M.H.   +5 more
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An Evaluation of the Effects of Dredging Within the Arkansas River Navigation System - Volume I - Introduction, Summary and Conclusions, and Recommendations [PDF]

, 1978
The foundation for the development of the Arkansas River was laid with the authorization of many upstream reservoirs in the comprehensive River and Harbor Act of 1946 signed by President Truman.
Research Center, Arkansas Water Resources
core   +2 more sources

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

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

The occlusion illusion: Partial modal completion or apparent distance? [PDF]

, 2007
In the occlusion illusion, the visible portion of a partly occluded object (eg a semicircle partly hidden behind a rectangle) appears to be significantly larger than a physically identical region that is fully visible.
Brooks, JL, Lai, KS, Palmer, SE
core  

Study on creep deformation and energy development of underground surrounding rock under four‐dimensional support

Deep Underground Science and Engineering
There is an urgent need to develop optimal solutions for deformation control of deep high‐stress roadways, one of the critical problems in underground engineering.
Zhanguo Ma, Junyu Sun, Peng Gong, Pengfei Yan, Nan Cui, Ruichong Zhang   +5 more
doaj   +1 more source

Study on zoning failure characteristics and support technology in water-drenched roadway of thick coal seam

Meikuang Anquan
Aiming at the large deformation and difficult control of the thick coal seam roadway under water-drenched conditions, the zoning damage characteristics of thick coal seam water-drenched roadway and the synergistic control mechanism of double arch zoning ...
Hong GAO
doaj   +1 more source

Microbial Effects on Repository Performance [PDF]

, 2010
This report presents a critical review of the international literature on microbial effects in and around a deep geological repository for higher activity wastes.
Humphreys, Paul, Metcalfe, R., West, J. M.   +2 more
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