Results 51 to 60 of about 1,887 (217)

Fracture Distribution Characteristics of Mining-induced Overburden in Thick Coal Seam and Pressure Relief Gas Extraction Technology

Meikuang Anquan, 2020
Aiming at the safety problem of high gas emission in 2303 fully mechanized caving face of Cuijiagou Coal Mine, the evolution law of “three zons” in goaf is studied by using physical similarity simulation and UDEC numerical simulation experiment on the ...
XU Gang, WANG Yunlong, ZHANG Tianjun, PAN Hongyu
doaj   +1 more source

Safe Effective Key Mining Technologies of Fully Mechanized Caving Face in Steeply Dipping Seam [PDF]

Proceedings of the 2015 3rd International Conference on Management Science, Education Technology, Arts, Social Science and Economics, 2015
Floor failure and slipping, rib spalling, toppling and slanting of supports and gliding of equipment in the panel generally exist during the top coal caving of steeply inclined thick seam. Technologies of fast moving, zone controlling of surrounding rock and equipment’s stability controlling were put forward through theoretical analysis and field ...
Zhan-bo Cheng, Xiao-meng Li
openaire   +1 more source

Application of 3D laser scanner, optical transducers and digital image processing techniques in physical modelling of mining-related strata movement [PDF]

, 2015
A physical testing protocol for modelling mining-related problems has been presented. • A new method for monitoring fracture propagation pattern has been introduced. • Laser based and optical devices have been used for physical modelling of subsidence. •
Ghabraie, B, Holden, L, Ren, G, Smith, J
core   +1 more source

Fracture evolution of a thick soft protection layer and the water inrush mechanism in overburden under longwall mining

Deep Underground Science and Engineering, EarlyView.
Through shear–tensile creep tests and viscoelastic modeling, the fracture evolution of thick soft protective layers is clarified. Results show thickness‐dependent rheological failure modes that govern four types of roof water inrush, providing a mechanism‐based framework for hazard prediction and control. Abstract In the Jurassic coal‐bearing strata of
Mengnan Liu, Wei Qiao, Xianggang Cheng, Xiangsheng Meng, Peichao Feng   +4 more
wiley   +1 more source

Coal seam gas control technology in working face with low content and high gas emission

Meikuang Anquan, 2021
In order to solve the problem of increasing gas emission caused by ultra-high intensity mining in fully mechanized top coal caving face with large mining height, starting from the gas emission law of fully mechanized caving face with large mining height,
ZHANG Dongxu
doaj   +1 more source

Models and methods to make decisions while mining production scheduling [PDF]

, 2019
Purpose is to develop a new approach to the design of mining operations basing upon models and methods of decision making. Methods. The paper has applied a complex approach involving approaches of decision-making theory.
Demchenko, Yu, Hrinov, V, Khorolskyi, A, Mamaikin, O   +3 more
core   +1 more source

Mechanism and disaster control new technology of strong ground pressure manifestation in ultra‐large mining face

Deep Underground Science and Engineering, EarlyView.
In response to the problem of strong mining pressure manifestation along the goaf roadway in a thick coal seam mining area, this study uses a new type of combined blasting roof cutting technology to effectively control the manifestation and deformation of mining pressure along the goaf roadway.
Xiaoding Xu, Manchao He, Jun Yang, Yubing Gao, Qiang Fu, Qing Ma, Yajun Wang   +6 more
wiley   +1 more source

Evolution characteristics of overburden structure in inclined fully mechanized caving under residual coal pillars of the upper layer

Gong-kuang zidonghua
In the stratified fully mechanized caving of ultra-thick coal seams, the inclined layout of upper and lower caving faces leads to lower fully mechanized caving face intermittently crossing residual coal pillars of the upper layer. This results in complex
LIU Yong, WANG Hongwei, WU Xuesong, TIAN Chengpeng, GUAN Rongfu, NIE Yunxiao, FAN Zhiwei, CAO Peipei   +7 more
doaj   +1 more source

Interpretable Tree‐Based Models for Predicting Short‐Term Rockburst Risk Considering Multiple Factors

Energy Science &Engineering, EarlyView.
Interpretable tree‐based models integrate microseismic, geological, and mining indicators to predict short‐term rockburst risk. SHAP analysis reveals the dominant role of energy‐related features and clarifies nonlinear factor interactions, enabling transparent and reliable early‐warning in deep coal mines.
Shuai Chen, Linming Dou, Atao Li, Wu Cai, Lei Zhang   +4 more
wiley   +1 more source

Study on mechanism and improvement technology of Top coal loss in horizontal sublevel fully mechanized caving mining

Energy Exploration & Exploitation, 2022
In view of solving the problems of large top coal loss and low recovery rate in the traditional caving process of horizontal section fully mechanized caving mining, taking the fully mechanized caving face of steeply inclined and extra-thick coal seam in ...
Fengfeng Wu, Shurong Zhang, Xin Yue, Changyou Liu, Qiwen Liu, Jian Zhang, Bo Lv, Zhiqiang Gao   +7 more
doaj   +1 more source