Results 41 to 50 of about 437 (161)

The Key Stratum Structure Morphology of Longwall Mechanized Top Coal Caving Mining in Extra-Thick Coal Seams: A Typical Case Study

Advances in Civil Engineering, 2020
Longwall mechanized top coal caving mining (LMTCCM) in extra-thick coal seams has its own characteristics. The law of mining pressure and overlying strata failure height in extra-thick coal seams are much larger than those of medium-thick and thick coal ...
Fulian He, Xiaobin Li, Wenrui He, Yongqiang Zhao, Zhuhe Xu, Quansheng Li   +5 more
doaj   +1 more source

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

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

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

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

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

Engineered Carbon Dots as Multifunctional Nanoplatforms for Next‐Generation High‐Performance Advanced Batteries

Carbon Energy, EarlyView.
Herein, we mainly summarize the characteristics of the main types of carbon dots (CDs), analyze the strategies for improving advanced batteries' performance via incorporating CDs, comprehensively summarize recent applications of CDs in the main components (electrode, electrolyte, and separator) of advanced batteries, and propose the technical ...
Chuang Jiang, Jinlong Feng, Zhenjie Liu, Ming Jia, Qingxi Hou, Wei Liu   +5 more
wiley   +1 more source

Research and application of roadway roof or floor coal thickness detection technology based on coal-rock interface wavefield characteristics

Meitan kexue jishu
Coal seam thickness is a key controlling factor for coal mine production and safety，as well as a core parameter for the construction of smart mines. Traditional detection methods have achieved some success in medium- and thin-seam coal mines; however, in
Yanghao PENG, Zhenjie PENG, Li HAI, Yajun WANG, Wei HAN   +4 more
doaj   +1 more source