Results 21 to 30 of about 53,166 (212)

Study on working resistance distribution of support and resistance increasing characteristics of support partition in longwall face with ultra-large length

Meitan kexue jishu, 2023
The effect of the increase of inclined length of fully mechanized mining face on roof breaking and stress evolution is complex, which leads to regional differences in the support characteristics of support in mining face.
Xingyu LIN, Gang XU, Xiaojin GAO, Zhen ZHANG, Qianjin LIU   +4 more
doaj   +1 more source

Coal mining and coal use: the European perspective [PDF]

The Lancet Planetary Health, 2019
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Michele Emiliano, Barbara Valenzano, Ezio Andreta, Eduardo Missoni, Alessandro Distante, Giammarco Surico, Domenico Rossetti di Valdalbero, Prisco Piscitelli   +7 more
openaire   +3 more sources

Effect of Moisture on the Macro Failure Characteristics of Weakly Consolidated Mudstone: Mesomechanism

Geofluids, 2022
Mudstone, whose significant characteristic is water-weakening, widely exists in all kinds of geotechnical engineering, which brings great security risks to engineering safety.
Jiahui Xu, Guichen Li, Haoyu Rong, Mohamed Elgharib Gomah, Changlun Sun, Jinghua Li, Suhui Zhang   +6 more
doaj   +1 more source

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

Meitan 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, Junfeng PAN, Meihua FENG, Chuang LU, Jiaming GAO, Yaodong YAN, Hongyuan MA   +6 more
doaj   +1 more source

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

Journal 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, Changzhong Ren, Yongjun Gao, Liang Gao, Baorui Jia, Yuan Nie, Ming Du, Ziyan Ma   +7 more
doaj   +1 more source

Characteristics and mechanism of strong dynamic load mine pressure in large mining height full-mechanized caving face with multiple thick and hard roof

Meitan xuebao
In view of the problems of strong mine pressure such as rapid shrinkage of hydraulic support column and easy support crushing in working face under the fully mechanized caving face with large mining height in multi-layer thick and hard roof of extra ...
Zhen ZHANG, Zhizeng HUANG, GANG XU, Xiaogang LIU, Qianjin LIU, Tielin ZHAO, Xingyu LIN   +6 more
doaj   +1 more source

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

International 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, Yongzheng Wu, Junchen Li, Penghe Zhou, Zhuoyue Sun, Jie He   +5 more
doaj   +1 more source

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

Shock 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, Yajun Xu, Shuji Zhao, Shangyu Du, Sai Zhang, Xiaoliang Pang   +5 more
doaj   +1 more source

Research on the mechanism and morphology of coal damage by water jet deflection angle

Geomechanics and Geophysics for Geo-Energy and Geo-Resources
This study investigates coal damage mechanisms under water jet deflection angles of 0°, 30°, 45°, and 60° through theoretical analysis, numerical simulation, laboratory experiments, and field validation.
Biao Hou, Zhen Zhang, Wenjun Ju, Kun Pan, Hongzhi Yang, Tao Yu   +5 more
doaj   +1 more source

Adaptive intelligent coupling control of hydraulic support and working face system for 6−10 m super high mining in thick coal seams

Meitan kexue jishu
The reserves and production of thick coal seams account for half of the total reserves and production of raw coal in China. By combing the history of thick coal seam mining, we summarize the technology and equipment development practice of thick coal ...
Huijun HAN, Guofa WANG, Yongxiang XU, Jinhu ZHANG, Sheng LEI, Yanpeng LI   +5 more
doaj   +1 more source