Results 31 to 40 of about 1,342 (177)

A Geometry Surveying Model and Instrument of a Scraper Conveyor in Unmanned Longwall Mining Faces

IEEE Access, 2017
To maintain the straightness of an unmanned longwall mining face, a track geometry surveying model of the scraper conveyor was constructed based on the position of the shearer.
Shangqing Hao, Shibo Wang, Reza Malekian, Boyuan Zhang, Wanli Liu, Zhixiong Li   +5 more
doaj   +1 more source

Mechanisms of Floor Heave in Roadways Adjacent to a Goaf Caused by the Fracturing of a Competent Roof and Controlling Technology

Shock and Vibration, 2020
In traditional sequential single-wing mining practices, one-entry longwall mining systems make it challenging to efficiently and smoothly transfer mining equipment during a continuous mining sequence.
Shuaigang Liu, Jianbiao Bai, Xiangyu Wang, Bowen Wu, Wenda Wu   +4 more
doaj   +1 more source

Research and exploration of longwall fully mechanized mining in steeply dipping coal seams

Meitan kexue jishu
To address the challenges of safe and efficient mining in steeply dipping coal seams in China and support the intelligent transformation of the coal industry, this article focuses on fully mechanized longwall mining technology for such seams.
Yongping WU, Panshi XIE, Dongfeng YUN, Hongwei WANG, Xicai GAO, Wenyu LYU, Shenghu LUO, Ding LANG, Bosheng HU, Hao ZHANG, Yingyi ZHANG   +10 more
doaj   +1 more source

A General Review on Longwall Mining-Induced Fractures in Near-Face Regions

Geofluids, 2019
It is believed that underground longwall mining usually produces fractures in the surrounding rocks. On the one hand, mining-induced fractures not only degrade the strength of the rock mass but also serve as main channels for fluids (e.g., water and ...
Qingsheng Bai, Shihao Tu
doaj   +1 more source

Ground Response and Mining-Induced Stress in Longwall Panel of a Kilometer-Deep Coal Mine

Shock and Vibration, 2021
In order to improve ground control of the longwall mining, ground response and mining-induced stress in the longwall panel of a kilometer-deep coal mine are investigated in this study.
Zhaohui Wang, Shengli Yang, Guoliang Xu, Zhijie Wen   +3 more
doaj   +1 more source

Field and numerical modelling on the stability of underground strata in longwall workings

Energy Geoscience, 2023
The longwall method is one of the feasible and efficient underground mining methods for greater depth of workings. Recently, Singareni Collieries Company Limited (SCCL), the largest coal-producing government company in the Southern part of India, has ...
G. Budi, K Nageswara Rao, Punit Mohanty
doaj   +1 more source

Simulation-based multiobjective optimization of tail beam control strategy for top-coal caving

Advances in Mechanical Engineering
In longwall top-coal caving, the motion control strategy of the hydraulic support tail beam directly affects the caving performance. To reduce gangue admixture and improve the efficiency of top-coal discharge, this study proposes an offline parameter ...
Lei Huang, Pinghui Li, Yaming Wu, Qingzhong Zhang, Anhao Jia, Jie Yang   +5 more
doaj   +1 more source

A coal seam‐roof‐floor coupling destressing control method of fault coal bursts induced by deep coal seam mining

Energy Science & Engineering, 2022
Fault coal bursts is a common type of coal bursts in coal mining. With increases in mining depths and mining intensities, the occurrence frequency and disaster degree of coal bursts in fault‐controlled areas are increasing in severity. Therefore, in this
Zhimin Xiao, Shitan Gu, Yunzhao Zhang, He Wang   +3 more
doaj   +1 more source

Longwall Mining Stability in Take-Off Phase [PDF]

Journal of Applied Mathematics, 2013
Mechanised longwall mining is one of the more commonly employed exploitation methods in underground mines in the north of Spain as well as in the rest of the world. It is continuously changing and evolving, with new techniques, technology, equipment, and face management practices and systems appearing for the purposes of improving aspects such as ...
María-Belén Prendes-Gero, José Alcalde-Gonzalo, Pedro Ramírez-Oyanguren, Francisco-José Suárez-Domínguez, Martina-Inmaculada Álvarez-Fernández   +4 more
openaire   +4 more sources

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source