Results 51 to 60 of about 5,124 (199)

Research and application of key technology of intelligent coal caving in high gas fully-mechanized top coal caving face

Meitan kexue jishu, 2023
At present, intelligent coal caving in high gas fully mechanized top coal caving face is facing many problems, mainly including poor recognition accuracy of coal gangue, incomplete control research on coal flow and gas concentration, cumbersome design ...
Yao CUI, Jinghong WU, Zhuang YE, Senlang ZHANG   +3 more
doaj   +1 more source

Research on the Influence of Mining Height on the Movement Characteristics of Overlying Strata during Extremely Thick Coal Seam Fully Mechanized Sublevel Caving Mining

Advance in Civil Engineering, 2021
The study of the effects of mining height on overlying strata movement and underground pressure characteristics during extremely thick coal seam fully mechanized sublevel caving mining is very important for choosing the reasonable mining height and the ...
Yongkang Yang, Jie Wei, Chenlong Wang
semanticscholar   +1 more source

Research and application of intelligent caving technology in fully mechanized working face

Gong-kuang zidonghua, 2021
The traditional top coal caving control mainly relies on manual coal caving control, which uses single-round of sequential coal caving. The working face equipped with electro-hydraulic control system mainly adopts the two-round sequential coal caving ...
WU Tong, YU Rui, LIU Qing, WEI Wenyan
doaj   +1 more source

Research on the Redistribution Law of Lateral Mining Stress and the Bearing Characteristics of Section Coal Pillar in Extra-Thick Fully Mechanized Top-Coal Caving Mining

Shock and Vibration, 2021
Due to the change of ground stress environment caused by underground coal mining, the intense lateral mining stress concentration is formed around the stope; so section coal pillar is generally set up to bear the mining pressure, but the different sizes ...
Qingwei Bu, M. Tu, B. Fu
semanticscholar   +1 more source

Study on sub-regional control of fully mechanized top-coal caving roadway under close irregular goa

Meikuang Anquan, 2023
In order to solve the control problems of large deformation of roadway surrounding rock in close coal seams, taking the fully mechanized top-coal caving roadway in close thick coal seams under irregular goaf of Xiaoyu Coal Mine as the engineering ...
LIU Huabo, MENG Fanjing, HUA Shaozhen, WANG Hao   +3 more
doaj   +1 more source

Comprehensive Dust Management of Working Face Based on a Group of Porous Large Area Water Injection Technology

Meikuang Anquan, 2020
Aiming at the problem of large dust concentration during the mining operation of the 81308 fully mechanized caving face, based on the principles of wet coal dust reduction and spray dust reduction, utilizing “static pressure + a group of porous” large ...
WANG Huifeng, CHEN Dianfu
doaj   +1 more source

Dynamic Random Arching in the Flow Field of Top-Coal Caving Mining

Energies, 2018
The large mining height fully mechanized top-coal caving mining technique has developed rapidly and become the most extensively used mining method for ultra-thick coal seams. The arching of coal/gangue and the drawing out of gangue are peculiar phenomena
Ningbo Zhang, Changyou Liu, Xiaojie Wu, Tingxiang Ren   +3 more
doaj   +1 more source

Fracture Evolution Mechanisms and Roof Failure Assessment in Shallow-Buried Soft Coal Seams Under Fully Mechanized Caving Mining

Applied Sciences
To address the challenges in the collaborative control of strong mine pressure and surface damage during fully mechanized shallow soft coal seam top-coal caving mining, this study takes the 22,031 working face of Xindeng (Zhengzhou, China) Coal Mine as ...
Yongkang Yang, Xiaoling Fan, Guoyou Hu, Shuai Li, Konghao Zhu   +4 more
semanticscholar   +1 more source

Study of the Evolution of Water-Conducting Fracture Zones in Overlying Rock of a Fully Mechanized Caving Face in Gently Inclined Extra-Thick Coal Seams

Applied Sciences, 2022
To study the caving of thick hard overburdens and evolution of water-conducting fracture zones in fully mechanized top-coal caving faces of gently inclined extra-thick coal seams, we comprehensively analyzed the 8103 working face of the Beixinyao Coal ...
Yang Zhou, Xueyi Yu
doaj   +1 more source

Rotating mining technology and underground pressure law of fully mechanized caving face in Baode Coal Mine

Meikuang Anquan, 2021
In order to study the technical problems in the mining of irregular working face and the law of underground pressure in the mining process, take the 81308 fully mechanized caving face of Baode Coal Mine as the background, this paper uses theoretical analysis, numerical simulation, and field tests to study the technology of end equipment lapping, mining
YANG Xiaodong, LI Cunzhou
openaire   +1 more source