Results 11 to 20 of about 844 (164)

Study on Coal Gangue Identification Based on Vibration and Its Adaptability to Coal-Caving Process Parameters

Shock and Vibration, 2023
The broken top coal and gangue in the fully mechanized cave mining will be released from the rear of the hydraulic support in the form of bulk. In this process, the medium properties through the coal opening can be judged by monitoring the vibration ...
Lirong Wan, Jiantao Wang, Dejian Ma, Zhaoji Li, Zhenguo Lu, Zhaosheng Meng   +5 more
doaj   +2 more sources

Study on Roof-Coal Caving Characteristics with Complicated Structure by Fully Mechanized Caving Mining

Shock and Vibration, 2019
With mining technology and mechanization degree being improving, fully mechanized caving mining technology (FCM) has become a main method for thick coal seam extraction in China.
Yunpei Liang, Lei Li, Xuelong Li, Kequan Wang, Jinhua Chen, Zhongguang Sun, Xuelin Yang   +6 more
doaj   +2 more sources

Development Patterns of Fractured Water-Conducting Zones in Longwall Mining of Thick Coal Seams—A Case Study on Safe Mining Under the Zhuozhang River

Energies, 2017
The key to the safe mining of thick coal seams under rivers is understanding the development patterns of fractured water-conducting zones (FWCZ) when various mining methods are used.
Feng Du, Rui Gao
doaj   +2 more sources

Study on failure law of overlying rock in fully mechanized caving mining in loess gully area in northern Shanxi

Meikuang Anquan, 2023
Aiming at the engineering background of shallow coal seam burial depth, thick soil layer, thin bedrock and strong disturbance of fully mechanized caving mining in the loess gully area of northern Shanxi Province, two methods of comprehensive numerical ...
ZHANG Guoyu, GAO Feng, ZHANG Zhiwei, XING Xudong, ZHU Tao, LIU Kaiwen, SU Jimin, ZHENG Guanghui
doaj   +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   +2 more sources

Support-surrounding rock relationship and top-coal movement laws in large dip angle fully-mechanized caving face

International Journal of Mining Science and Technology, 2018
When mining the fully-mechanized longwall caving face along strike, the unstable equipment, the low top-coal recovery ratio and the difficulty in controlling surrounding rock may occur due to large dip angle.
Hu Shaoxuan, Ma Liqiang, Guo Jinshuai, Yang Peiju   +3 more
doaj   +2 more sources

Dynamic Prediction Model of Multisource Gas Emissions in a Fully Mechanized Top Coal Caving Based on the Coal Particle Size Distribution

Shock and Vibration, 2021
Coal particle size is an important factor affecting the gas emission law. Taking Wangjialing coal mine as the research object, the particle size distribution of coal mining and caving is analyzed via field tests in order to develop the gas emission ...
Han Gao, Xuanping Gong, Xiaoyu Cheng, Rui Yu   +3 more
doaj   +2 more sources

A Design Method and Application of Backfilling Hydraulic Supports in Reforming Top-Coal Caving Hydraulic Supports

Applied Sciences, 2023
Solid backfilling is an environmentally friendly method of coal mining. Backfilling hydraulic supports are important devices in solid backfill mining.
Qiang Zhang, Peitao Shi, Meng Li, Tingcheng Zong, Weijian Song   +4 more
doaj   +2 more sources

Study on thin bedrock deformation and strata behavior in coal seam mining under ultra-thick unconsolidated strata

Gong-kuang zidonghua, 2018
Taking No.12051 fully-mechanized coal face of Zhaogu No.1 Coal Mine as research object, thin bedrock deformation and strata behavior in coal seam mining under ultra-thick unconsolidated strata were studied by use of UDEC numerical simulation software ...
ZHAI Xinxian, LYU Chao, TANG Shijie, YU Chunsheng   +3 more
doaj   +2 more sources

Study on the Characteristics of Top-Coal Caving and Optimization of Recovery Ratio in Steeply Inclined Residual High Sectional Coal Pillar

Geofluids, 2020
This paper is aimed at solving the technical problems such as low recovery ratio and frequent disasters in steeply inclined and extrathick coal seams at residual high sectional coal pillar.
Wenhua Yang, Xingping Lai, Pengfei Shan, Feng Cui, Yiran Yang   +4 more
doaj   +2 more sources