Results 61 to 70 of about 717 (138)

Research and application of top coal caving characteristics at end of fully mechanized caving working face in hard and thick coal seam with super large mining height

Meitan xuebao
Fully-mechanized caving mining with super-large mining height is an effective method for safe and efficient mining of thick and extra-thick coal seams. Aiming at the problem of poor top coal caving ability at the end of fully-mechanized caving mining in ...
Ying MA, Shijun LIU, Ziyan MA, Duanzhi MA   +3 more
doaj   +1 more source

Feasibility study and optimal coal drawing process for fully mechanized caving in close-distance extra-thick coal seams

Gong-kuang zidonghua
Research on optimal coal drawing parameters for working faces with significant variation in seam thickness, where the thickness exceeds the standard mining height in close-distance coal seams, has been limited.
ZHANG Wei, GAO Peng, CUI Bo, Asihaer·Niyazibieke, PAN Weidong   +4 more
doaj   +1 more source

Surface Subsidence Control Mechanism and Effect Evaluation of Gangue-Backfilling Mining: A Case Study in China

Geofluids, 2018
Comprehensive mechanization solid backfilling mining is a new technology developed in China for coal mining and surface subsidence control. Based on a gangue-backfilling project in the Yangzhuang Coal Mine, the characteristics of underlying strata and ...
Huaizhan Li, Guangli Guo
doaj   +1 more source

Study on development height of water-conducting fracture zone in overlying strata based on borehole permeability coefficient variation

Meikuang Anquan
As coal resources continue to be depleted, mining faces are gradually extending to deeper levels, where they are confronted with complex geological conditions such as high-pressure confined water and high in-situ stress, leading to an increasing risk of ...
Junpeng YANG, Kai BIAN, Cunjin LU, Ming YUAN, Junbin CHANG, Xiaofeng YANG   +5 more
doaj   +1 more source

Theory and key technologies for intelligent fully-mechanized top-coal caving faces of annual production of millions of tons

Meitan kexue jishu
The research focused on addressing various challenges in intelligent top caving theory, intelligent perception and recognition key technology, intelligent caving comprehensive decision-making technology, and remote caving intelligent control technology ...
Bin YU, Yang TAI, Gang XU, Yong LI, Dongyin LI, Shibo WANG, Tiejun KUANG, Ercun MENG   +7 more
doaj   +1 more source

Research on the Law of Top Coal Movement and Influence Factors of Coal Caving Ratio for Fully Mechanized Top Coal Caving Working Face

Energies
To investigate the movement law of top coal and the influencing factors of coal caving ratio in fully mechanized top coal caving faces, this study adopts the theory of dispersoid mechanics. First, a top coal flow model was established without considering
Jinhu Zhang, Zhiheng Cheng, Sheng Lei, Kai Guo, Liang Chen, Zherui Zhang, Jiahui Chen   +6 more
doaj   +1 more source

Study on the development characteristics of the water-conducting fissure zone in large-height and ultra-wide working faces at Sihe Coal Mine

河南理工大学学报. 自然科学版
ObjectivesTo investigate the development characteristics of the water-conducting fissure zone in large-height and ultra-wide working faces at Sihe Coal Mine， using the 6306 working face as the study subject.MethodsThe variation in apparent resistivity of
Wang Guoliang, Wang Fei, Wang Shuyong, Cheng Fengfei, Du Feng   +4 more
doaj   +1 more source

Research on strata movement control in deep areas of super-thick and weak-cemented overlying strata during local backfill mining—A case study based on Yingpanhao Coal Mine

Results in Engineering
Deep filling mining is not only affected by the coupling effect of high ground stress and water environment and its own material properties, but also the mining scheme will have different influences on the stress evolution of overlying rocks and surface ...
Leixiang Peng, Guojian Zhang, Huaiwen Wang, Shuo Sun, Yan Zhang, Zhiyong Liu, Zhi-yang Wang   +6 more
doaj   +1 more source

Quantification of key factors and hazard classification of “coal wall” stability under high-intensity mining

Meitan xuebao
Aiming at the engineering problem of coal wall rib spalling under high-intensity mining that restricts normal mining and intelligent prediction and control, based on the proposed “combined short cantilever beam-articulated rock beam structure”, the ...
Shaohong YAN, Bo XUE
doaj   +1 more source

Surface damage reduction effect of ultra-high working face in Shangwan coal mine

Scientific Reports
Green mining is the basic background of high-quality mining, and source reduction is the most important part, among which the optimization of working face height and length is the most active.
L. I. U. Xinjie, Yang Yingming, Zhao Yongqiang, WANG Xiaolong, Liu Gang, Xu Zhuhe   +5 more
doaj   +1 more source