Results 21 to 30 of about 939,474 (309)

An Enhanced Security Autonomous Control System for Unmanned Rubber-Tired Vehicles Operating in Underground Mines

open access: yesJournal of Advanced Transportation
The operating environment in underground mines is complex and fraught with various hazards that pose severe risks to miners’ safety. As an essential auxiliary transportation device in mines, the operational safety and reliability of rubber-tired vehicles
Zhen Tan   +7 more
doaj   +1 more source

Photo‐Gated Corona Microfluidics

open access: yesAdvanced Science, EarlyView.
Photo‐gated corona microfluidics decouples optical programming from electric‐field actuation to enable reconfigurable manipulation on open, electrode‐pattern‐free surfaces. Near‐infrared irradiation locally melts paraffin, creating a reversible charge‐relaxation pathway that reconstructs the electric field.
Xiaxia Cui   +9 more
wiley   +1 more source

Mechanical properties and energy evolutions of burst-prone coal samples with holes and fillings

open access: yesInternational Journal of Coal Science & Technology
During the mining process of impact-prone coal seams, drilling pressure relief can reduce the impact propensity of the coal seam, but it also reduces the integrity and strength of the coal mass at the side of the roadway.
Yukai Fu   +5 more
doaj   +1 more source

Valuing the Non-Market Impacts of Underground Coal Mining [PDF]

open access: yes
This paper has been published in a peer-reviewed journal as: Gillespie, R. & M. E. Kragt (2012). "Accounting for nonmarket impacts in a benefit-cost analysis of underground coal mining in New South Wales, Australia." Journal of Benefit-Cost Analysis 3(2):
Gillespie, Robert, Kragt, Marit Ellen
core   +1 more source

Robust Photocatalytic Hydrogen Evolution Over a Conjugated Metal‐Organic Framework Heterojunction

open access: yesAdvanced Science, EarlyView.
We report a conjugated coordination polymer, Cd‐TMT (TMT = 1,3,5‐trimercaptotriazine), featuring an intrinsic molecular‐level charge transport network. The conjugated TMT ligands facilitate strong intra‐ligand charge transfer, while their ordered π‐π stacking along the [111] direction establishes a continuous pathway for directional electron migration,
Chunzhe Wang   +6 more
wiley   +1 more source

Research on the Characteristics of Gas Cushioning Hydraulic Leg Under Impact Condition

open access: yesShock and Vibration
Traditional hydraulic legs ensure the safety of the leg through safety valves. However, due to the slow response speed of the safety valve, the safety valve does not respond in time when the hydraulic leg receives an impact, resulting in deformation or ...
Shiwei Li   +5 more
doaj   +1 more source

Response characteristics of mining-induced overburden strata under different degrees of regional fracturing on the roof

open access: yesMeitan xuebao
To obtain the activity patterns and response characteristics of the overburden strata under different fracturing degrees of the roof, and thereby provide a reference for preventing and controlling roof-dominated rock burst through regional fracturing ...
Jianhong WU   +6 more
doaj   +1 more source

Clinchmore Coal Mining Company [PDF]

open access: yes, 1940
This scrip is from the Clinchmore Coal Mining Company mine with a value of $1.https://scholarworks.moreheadstate.edu/kilgore_scrip_collection/1026/thumbnail ...
Clinchmore Coal Mining Company
core  

Process Safety in Coal Mining

open access: yes, 2023
Coal is an important natural resource. Improving the safety levels of the coal mining process while ensuring that coal production is at an acceptable level are problems to which we must attribute great importance.

core   +1 more source

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