Results 31 to 40 of about 9,068 (173)

Analysis of operation parameters of partial backfilling in the context of selective coal mining [PDF]

, 2019
Purpose is to determine factors of effect of mechanical parameters and geometry of packs, constructed using the undercut rocks in the process of selective coal mining, on the state of geomechanical system within a mine working-stope junction during a ...
Dereviahina, N, Malanchuk, L, Sotskov, V
core   +1 more source

Technologies of intensive development of potash seams by longwall faces at great depths: current problems, areas of improvement

Записки Горного института, 2023
The results of the analysis of practical experience in the development of potash seams using longwall mining systems at the mines of OAO “Belaruskali” are presented.
Vladimir P. Zubov, Denis G. Sokol
doaj  

Prediction of face advance rate and determination of the operation efficiency in retreat longwall mining panel using rock engineering system

International Journal of Coal Science & Technology, 2019
A new approach for prediction of face advance rete (FAR) prior to mining operation and determination of the operation efficiency after mining operation in retreat longwall mining panel is presented based upon the concepts of rock engineering system (RES).
Sajjad Aghababaei, Hossein Jalalifar, Gholamreza Saeedi   +2 more
doaj   +1 more source

Applying European approach to predict coal self-heating in Ukrainian mines [PDF]

, 2019
Purpose is the prediction of coal self-heating and determination of the factors effecting the dynamics of emission of tracer gases (TG) used for routine control of coal self-heating within the production unit involving European approach. Methods.
Gamiy, Yu, Kostenko, T, Kostenko, V, Kostyrka, O, Liashok, Ya, Zavialova, O   +5 more
core   +1 more source

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

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

Interaction of deformation-strength characteristics of the support load-bearing elements in the preparatory workings [PDF]

, 2018
The objective of this work is to study the relationship of the deformation-strength characteristics of the fastening system with its displacement value. The tendencies of influence are divided into two groups.
Barabash, Mykhailo, Husiev, Oleksandr, Kovalevska, Iryna, Snihur, Vasyl, Ковалевская, И. А., Ковалевская, Ирина Анатольевна, Ковалевская, І. А., Ковалевська, Ірина Анатоліївна   +7 more
core   +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