Results 61 to 70 of about 1,100 (178)

Study on Pillar Stability of Wongawilli Mining Area in Shallow Close Distance Coal Seams

Procedia Earth and Planetary Science, 2009
AbstractIn order to ensure the lower working face safety production under Wongawilli mining area pillars in shallow close distance coal seams in Bulianta coalmine, the influence of Wongawilli coal pillars’ stability in upper coal seam on lower working face is studied by three-dimensional simulation and field measurement.
Zhu, Wei-bing, Xu, Jia-lin, Kong, Xiang, Xuan, Da-yang, Qin, Wei   +4 more
openaire   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source

Research on the attenuation characteristics of seismic energy in multicoal seam mining and the warning method of rock burst

Energy Science & Engineering
The mechanism of rock burst induced by the superposition of dynamic and static loads in multicoal seam mining is unique. To investigate the propagation attenuation law of large‐energy microseismic events and the induced mechanism of rock burst under this
Hongwei Mu, Yongliang Zhang, Mingzhong Gao, Quanlin Zhu, Jingbo Li, Jinfeng Cao, Wentao Fan   +6 more
doaj   +1 more source

Semi‐analytical solution for the stability of deep vertical shaft considering time‐dependent rock‐structure interaction

Deep Underground Science and Engineering, EarlyView.
A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen, Pinqiang Mo, Zhao Lu, Lianfei Kuang, Qiang Zhang, Abolfazl Eslami   +5 more
wiley   +1 more source

Multiple injection techniques to stimulate complex fracture networks in coal reservoirs: A case study on gas disaster reduction of subsurface coal mine in southwest China

Deep Underground Science and Engineering, EarlyView.
An experimental device for physical simulation of hydraulic fracturing, comprising: a load‐bearing mechanism with multiple interconnected plates that collectively form an sample chamber; a load‐generating mechanisms, with multiple load‐generating mechanisms arranged within the experimental chamber.
Delei Shang, Farui Shi, Jun Lu, Minghui Li, Cunbao Li, Heping Xie   +5 more
wiley   +1 more source

Gaborlet‐guided sparse filtering: A novel intelligent method for lithology identification by vibration signals while drilling

Deep Underground Science and Engineering, EarlyView.
The flowchart illustrates rock specimen testing, vibration signal acquisition, and feature extraction with Gaborlet and sparse filtering for classification. Abstract Traditional lithology identification methods mainly rely on core sampling and well‐logging data.
Jian Hao, Danqi Zhang, Zhenqi Song, Jinrui Wang, Qi Wang, Heqing Liu   +5 more
wiley   +1 more source

Study on the Law of Repeated Mining Strata Movement and Surface Subsidence in Close Distance Coal Seam

, 2023
Abstract In order to study the characteristics of surface subsidence under the condition of repeated mining of close distance coal seams in Wuhai mining area of the Yellow River Basin, Wuhushan Coal Mine in Wuhai City, Inner Mongolia was taken as the engineering background.
Zhoukang Wu, Wencai Wang, Tan Li, Shaochen Yang, Peng Wang, Xiangxiang Gao, Baoshan Su   +6 more
openaire   +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

On Asymmetric Failure Characteristics of Tunnels and Surrounding Rock Control Techniques Under Close-Distance Repeated Coal Mining

Advances in Civil Engineering
In response to the problem of significant deformation and obvious strata pressure in tunnel caused by close-distance repeated mining, along with difficult control of surrounding rocks, theoretical analysis, and numerical simulation methods were employed ...
Zhengduo Dai, Liyun Yang, Xiaowu Zhang
doaj   +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