Results 41 to 50 of about 10,633 (207)

Characteristics of Stratum Structure and Fracture Evolution in Stratified Mining of Shallow Buried High-Gas-Thick Coal Seam by Similarity Simulation

Geofluids, 2021
The stratified mining of super thick coal seam is a process of repeated disturbance of the top roof, especially in the lower stratification, the upper complex rock layer has a greater settlement space, resulting in great changes in the strata structure ...
Qin Guangpeng, Cao Jing, Wang Chao, Wu Shuo, Zhai Minghua   +4 more
doaj   +1 more source

Mechanism of deformation and pressure relief control of dynamic gob-side entry surroundings in fully-mechanized caving mining for extra-thick coal seam

Meitan kexue jishu, 2023
Affected by the superposition of working face mining, strong rock pressure phenomena such as rock burst and large deformation easily occur in the gob-side entry when mining extra-thick coal seams. Taking the extra-thick coal seam mining of Caojiatan Coal
GAO Yubing, WANG Qi, YANG Jun, DING Weibo, FU Qiang, XU Xiaoding   +5 more
doaj   +1 more source

Numerical methods of geomechanics tasks solution during coal deposits’ development [PDF]

, 2016
Purpose. Generalization of numerical modeling of geomechanical processes in the vicinity of mine workings by finite elements method and making recommendations for substantiation of suitable construction and behavior of rock massif physical model ...
Bondarenko, V, Hardygora, M, Snihur, V, Sotskov, V, Symanovych, H   +4 more
core   +2 more sources

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

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

Study on Water Disaster Prevention and Control Technology under Condition of Extra-thick Coal Seam with Slicing Fullmechanized Caving Mining

E3S Web of Conferences, 2018
Some coal seams belong to cretaceous strata in the east of Inner Mongolia, China. There are obvious differences of rock characteristics and mechanical properties between Cretaceous and Carboniferous- Permian strata. The overburden failure characteristics
Li Jianghua, Lian Yuguang, Li Hongjie
doaj   +1 more source

Study of automated top-coal caving in extra-thick coal seams using the continuum-discontinuum element method [PDF]

International Journal of Rock Mechanics and Mining Sciences, 2019
Abstract In order to investigate top-coal drawing regularity and automated top-coal caving technology in extra-thick coal seams, an approach coupling the particle element and the block element is presented based on the continuum-discontinuum element method (CDEM).
Qunlei Zhang, Jinchao Yue, Chuang Liu, Chun Feng, Huamin Li   +4 more
openaire   +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

Evolution Law of Gas Discharge of Carbon Monoxide in Mining Extra-Thick Coal Seam of Datong Mining Area

Geofluids, 2021
In order to reveal the evolution law of gas discharge of carbon monoxide in mining an extra-thick coal seam of the Datong mining area by the numerical simulation and field monitoring test, the 8202 working face and 8309 working face in the Tongxin coal ...
Zhanyuan Ma, Feng Du
doaj   +1 more source

Study on burst risk assessment of coal seam in folded area based on pre-mining stress back analysis

Meitan kexue jishu, 2023
In order to scientifically evaluate the impact risk of steeply inclined extra-thick coal seam in folded area and provide theoretical guidance for the prevention and control of rock burst, a numerical model including folds is established in this paper ...
Junsong XU, Pengzhi PAN, Jianqiang CHEN, Shankun ZHAO, Zhenhua WU, Xudong LIU   +5 more
doaj   +1 more source