Results 51 to 60 of about 7,043 (214)

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

Deep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu, Manchao He, Jun Yang, Yubing Gao, Qiang Fu, Qing Ma, Yajun Wang   +6 more
wiley   +1 more source

Research on influence of coal seam thickness on caving characteristics of top-coal in inclined coal seam fully - mechanized caving faces

Meitan kexue jishu
The coal seam at the 2125 fully mechanized top-coal caving face in Hebi Coal Mine No. 6 exhibits unstable occurrence, with a thickness ranging from 0.4 m to 24 m and a dip angle varying between 8° and 35°.
Dongyin LI, Mingjin JIA, Mengguang LI, Hongbin LI, Shen WANG, Song LI   +5 more
doaj   +1 more source

Longwall top coal caving design for thick coal seam in very poor strength surrounding strata [PDF]

International Journal of Coal Science & Technology, 2020
Abstract Alpu lignite field is an important coal deposit with nearly 2 billion tons of coal resources located in the middle of Turkey. The mine deposit consists of three main seams. The thickness of two of them vary from 4 to 30 m. The surrounding rock mass is very poor in terms of strength.
Hossein Jangara, C.A. Ozturk
openaire   +1 more source

English for Study and Work: Coursebook in 4 books. Book 2 Obtaining and Processing Information for Specific Purposes [PDF]

, 2015
Подано всі види діяльності студентів з вивчення англійської мови, спрямовані на розвиток мовної поведінки, необхідної для ефективного спілкування в академічному та професійному середовищах.
Зуенок, И. И., Зуенок, Ирина Ивановна, Зуєнок, І. І., Зуєнок, Ірина Іванівна, Кострицкая, С. И., Кострицкая, Светлана Ивановна, Кострицька, С. І., Кострицька, Світлана Іванівна, Поперечна, Н. В., Поперечна, Неллі Василівна, Поперечная, Н. В., Поперечная, Нелли Васильевна, Швец, Е. Д., Швец, Елена Дмитриевна, Швець, О. Д., Швець, Олена Дмитрівна   +15 more
core  

Application of 3D laser scanner, optical transducers and digital image processing techniques in physical modelling of mining-related strata movement [PDF]

, 2015
A physical testing protocol for modelling mining-related problems has been presented. • A new method for monitoring fracture propagation pattern has been introduced. • Laser based and optical devices have been used for physical modelling of subsidence. •
Ghabraie, B, Holden, L, Ren, G, Smith, J
core   +1 more source

Stress Redistribution Mechanisms and Subsidence Control of Fluidized Gangue Backfilling in Underground Coal Mining: Integrated Experimental and Numerical Investigation

Energy Science &Engineering, EarlyView.
Fluidized gangue backfilling controls mining subsidence through stress redistribution in composite backfill‐pillar systems, reducing surface settlement and stress concentrations. Multi‐scale experimental and numerical analysis provides quantitative design parameters for optimizing ground control in sustainable underground coal mining operations ...
Weilong Zhang, Jie Zhang, Yuanzhen Zhang, Wenjing Liu, Liang Li, Deyi Nan, Guannan Zhao, Chen Yang, Haiqing Bian, Hua Shao, Xiao Zuo, Changtai Zhou   +11 more
wiley   +1 more source

Study on overburden movement law and ground pressure behavior in fully mechanized top coal caving face under the disturbance of upper coal seam

Meikuang Anquan, 2023
In recent years, most of the coal mines in Zhungeer Coalfield have entered the mining of the second main coal seams, such as 6#, 10# and 11#, with an average thickness of more than 10 m, so most of the coal mines use fully mechanized caving mining ...
Hua NAN, Zhuoying WANG
doaj   +1 more source

Experimental Investigation of Sensitivity for Coal and Gas Outburst Risk Prediction Indexes in Raw and Tectonic Composite Coal Seams

Energy Science &Engineering, EarlyView.
A comparative study was conducted on gas desorption laws of raw and tectonic coals. The sensitivity of regional and local outburst prediction indexes was compared. Gas content is more sensitive than gas pressure for composite coal seams. K1 can more accurately predict the outburst danger than Δh2 $\Delta {h}_{2}$ in composite coal seams.
Haijun Guo, Xi Xi, Kai Wang, Liang Wang, Yulin Li   +4 more
wiley   +1 more source

Iron Age to Medieval entomogamous vegetation and Rhinolophus hipposideros roost in south-eastern Wales (UK) [PDF]

, 2006
Karst cave systems are well developed in Wales (UK) and, in some instances, constitute important bat roosts. Ogof Draenen, near Blaenavon in south-east Wales, is the most recent major cave discovery (1994) with already > 70 km of passages explored ...
Bronk, Bui-Thi, Camacho, Carbonnel, Carbonnel, Carrión, Chambers, Chambers, Coles, Herrera, Jegla, Maher, Maher, Michael J. Simms, Pendleton, Proctor, Rosen, Simms, Simms, Smith, Stuiver, Suzanne A.G. Leroy, Vaughan, Waltham, Warren   +24 more
core   +1 more source

Interpretable Tree‐Based Models for Predicting Short‐Term Rockburst Risk Considering Multiple Factors

Energy Science &Engineering, EarlyView.
Interpretable tree‐based models integrate microseismic, geological, and mining indicators to predict short‐term rockburst risk. SHAP analysis reveals the dominant role of energy‐related features and clarifies nonlinear factor interactions, enabling transparent and reliable early‐warning in deep coal mines.
Shuai Chen, Linming Dou, Atao Li, Wu Cai, Lei Zhang   +4 more
wiley   +1 more source