Results 71 to 80 of about 35,277 (264)

Process research and application of axial roof cutting technology of abrasive jet and fracture

Meitan xuebao
The large area overhanging of thick and hard roof is one of the critical reasons for inducing coal burst. Because of the shortcomings of deep borehole blasting and conventional hydraulic fracturing for the overhanging roof, the axial roof cutting ...
Yongxue XIA, Chenyang ZHANG, Taotao DU, Jinlong ZHOU, Ruda SUN, Chuang LU, Junfeng PAN   +6 more
doaj   +1 more source

Industrial Structure and Ecological Sustainability: Evidence From Small‐Scale Industries in Nordic Countries

Corporate Social Responsibility and Environmental Management, EarlyView.
ABSTRACT This study examines how industrial structure is associated with ecological sustainability in Nordic countries over the period 2001–2022. The analysis focuses on the share of small‐scale industries in the industrial system and examines its association with ecological sustainability, measured by the load capacity factor.
Ismail Demirdag, Abdullah Emre Caglar, Mustafa Naimoğlu   +2 more
wiley   +1 more source

Research and application on in-situ enhancement mechanism of coal-slurry interface in grouting modification of coal roadway

Meitan xuebao
Grouting modification is an effective means for reinforcing fractured coal roadways, with the regulation of the coal-slurry interface being the core of grouting modification.
Jiafeng LI, Hongpu KANG, Jianwei YANG, Xiaodong SUN, Yanjun FENG, Pengfei JIANG, Tao WANG   +6 more
doaj   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Study on the effect of mining height on overburden strata movement in longwall mining

International Journal of Coal Science & Technology
The mining height of a coal seam is a critical factor influencing the detachment, collapse, and formation of the collapse angle of the strata during strata movement. To clarify the mechanism by which mining height affects strata movement characteristics,
Ying Ma, Qunying Wu, Jinhong Yang, Fuqiang Gao, Jinfu Lou, Bingwei He, Jianzhong Li   +6 more
doaj   +1 more source

Key technologies of coal mine roadway adaptive dust cleaning robot

Meitan kexue jishu
In response to the problems of low automation levels, high water consumption, and poor effectiveness of dust cleaning in coal mines, a roadway dust cleaning robot is developed.
Huaiwei REN, Zhifeng WANG, Jie ZHOU, Shijun LI, Ziyan MA, Shuji ZHAO, Ming DU, Guoqing LI   +7 more
doaj   +1 more source

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

Deep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski, Alessandro Verdecchia, Oliver Heidbach, Rebecca M. Harrington, David Healy   +4 more
wiley   +1 more source

Optimal selection test of material ratio in the top of Ordovician limestone grouting reconstruction

Meitan kexue jishu
It is an effective method to reduce the risk of floor water inrush by grouting reconstruction and sealing of water channel on top of Ordovician limestone before deep confined water mining in Huabei type coal mine in China. The basic properties of fly-ash
Zhenli FAN, Lutong CAO, Fengda ZHANG, Xiwen YIN, Qiuyang ZHAO, Zhiwei ZHANG   +5 more
doaj   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source