Results 51 to 60 of about 1,364 (186)

Numerical Simulation Study on Fully-Mechanized Top Coal Caving in Extra-Thick Coal Seam

IOP Conference Series: Earth and Environmental Science, 2020
Abstract Three working face of a mine 250203, 250205, 250206 as the research object, the establishment of a geomechanical model according to the actual situation of the project. FLAC3D using numerical simulation method to analyze section coal pillar width in 20 m, 10 m, when 0 m, Face sequential mining process key strata caving stride ...
Wu-lin Lei, Xingliang Li, Yanfeng Chen, Weihua Duan, Jianhua Chen   +4 more
openaire   +1 more source

Investigation on rational width of coal pillar and roadway support in isolated panel of extra-thick coal seam

Frontiers in Earth Science, 2023
The methods of numerical simulation and on-site measurement is used to analysis reasonable coal pillar width (CPW) and roadway support in isolated panel of extra-thick coal seam. Numerical modeling shows that a maximum vertical stress in isolated panel is 32.9 MPa, and stress concentration factor reaches 2.99, which is more affected by the mining of ...
Xiang He, Xiang He, Xiang He, Shuxin He, Shuxin He, Shuxin He, Yongbo Cai, Yongbo Cai, Ruiyang Xu, Ke Yang, Ke Yang   +10 more
openaire   +2 more sources

Research on coal pillar width and control of gob side entry with fully-mechanized caving mining in extra thick coal seam

, 2021
In order to study the reasonable width of coal pillar in gob side entry of fully mechanized top coal caving in extra thick coal seam, the 8305 working face is taken as the research object, and the method of theoretical analysis, numerical simulation and ...
LI Yaohui, HE Fulian, QIN Binbin, GUO Jingang   +3 more
core   +1 more source

Mechanism of Rock Bursts Induced by the Synthetic Action of “Roof Bending and Rock Pillar Prying” in Subvertical Extra-Thick Coal Seams

Frontiers in Earth Science, 2021
When studying the rock burst mechanism in subvertical extra-thick coal seams in the Wudong coal mine in Xinjiang, China, most studies focus on rock pillars, while the effect of the roof on rock bursts is usually ignored.
Zhenhua Wu, Zhenhua Wu, Peng-Zhi Pan, Peng-Zhi Pan, Jianqiang Chen, Xudong Liu, Shuting Miao, Shuting Miao, Peiyang Yu, Peiyang Yu   +9 more
doaj   +1 more source

Design on Waterproof Safety Coal Pillar at Outcrop Area of Thick Coal Seam Under he Large Thick Jurassic Red Stratum

, 2020
To study the waterproof coal pillar design for mining in the outcrop area of thick coal seam in Shanxi Formation under the large Jurassic red stratum in the seventh mining area planned and designed by Dongtan Coal Mine, the systematic analysis is carried
XIE Huadong
core   +1 more source

Evolution characteristics of overburden three zones in fully-mechanized caving face in huge thick coal seam

, 2021
To explore the evolution law of overburden strata during the mining of huge thick coal seams, an experimental study on the distribution characteristics of the overburden three zones with large mining height was carried out.
LIN Haifei, WANG Xuyou, ZHAO Pengxiang, QIU Chunliang, MENG Xiangjun, NING Tingzhou, AN Xuedong, YANG Junsheng, SUN Hongxing, WANG Chao   +9 more
core   +1 more source

Formation Mechanism and Detection Method of Overburden Abscission Layer in Mining Coal Seam Under Thick Sandstone

, 2020
In order to study the development characteristics and formation location of mining overburden in thick coal seam under thick sandstone, the overburden movement caused by mining of thick coal seam at 2301 working face in a Datong mine is taken as an ...
NIU Hongwei, GAO Feng, HAN Jinli, WANG Mengchao, CAO Zhenjun
core   +1 more source

Key technology of pressure-relief gas extraction in low dynamic fracture zone of mining overburden in single ultra-thick coal seam

Meitan kexue jishu
Different from the high gas and prominent mining areas in the middle east of China, the mining face of single thick and extra thick coal seam in the western mining area has a large amount of unloading gas and mainly originates from this coal seam, if the
Longyong SHU, Yuanlong ZHANG, Xin SONG, Yongpeng FAN, Yang LI   +4 more
doaj   +1 more source

Numerical Analysis of Interaction Effects in Double Extra-thick Coal Seams Mining

Procedia Earth and Planetary Science, 2013
AbstractThe interaction effects in multi-seam mining depends on many factors such as local geological and geotechnical conditions, mining depth, seam sequencing, and mining method employed, etc. The paper discusses preliminary study on the interaction effects in underground mining of double extra-thick coal seams in Mae Moh coalfield in Thailand.
Lin, Nayzar, Sasaoka, Takashi, Shimada, Hideki, Hamanaka, Akihiro, Matsuia, Kikuo   +4 more
openaire   +1 more source

Engineering Biochar‐Derived Functional Materials for High‐Performance Supercapacitors: Design Principles, Mechanisms, and Scalable Strategies

Carbon Energy, EarlyView.
ABSTRACT Biochar has emerged as a useful and adaptable source of carbon for supercapacitor electrodes. Its value comes from the way biomass chemistry, thermal conversion, and activation conditions shape the resulting pore network, surface groups, and degree of carbon ordering.
Soumen Mandal, Avinash C. Mendhe, Mayna Roy, Neha S. Barse, Taejoon Park, Han‐Seung Lee, Haigun Lee   +6 more
wiley   +1 more source