Results 131 to 140 of about 1,016,619 (289)

Multi‐factor coupling effects in hydraulic fracturing of laminated shale: Experimental insights and physics‐informed neural network‐driven optimization

Deep Underground Science and Engineering, EarlyView.
This study establishes a multi‐factor coupling framework for predicting breakdown pressure in laminated shale by integrating experimental hydraulic fracturing tests, physics‐informed neural networks (PINNs), and Sobol sensitivity analysis. It reveals how differential stress, the bedding dip angle, and the injection rate interact to influence fracture ...
Tao Wang, Guoyao Xu, Liyuan Liu, Yao Zhang, Sitao Zhu, Hongyang Chu, Kaikai Zhao   +6 more
wiley   +1 more source

Evolution Mechanism of Stress-Concentration Shell Structure and Stability Control of Thick–Hard Roofs Based on a Staged Thick-Plate Model

Eng
To address delayed roof fracture, severe stress concentration, and strong strata pressure under thick–hard roof conditions, this study investigated the 1014 mining face of Yushuquan Coal Mine.
Lili Xie, Zhibiao Guo, Jinglin You, Junao Zhu, Yuanxin Zhao   +4 more
doaj   +1 more source

League-ally Speaking, 1943

League-ally Speaking was a newsletter published by the Toledo League for the Hard of Hearing in Toledo, Ohio. Incorporated in 1920, the organization was also an agency of the Toledo Community Chest. In 1947 the organization changed its name to the Toledo
Toledo League for the Hard of Hearing
core  

Mechanism of “seesaw‐type” rock burst in coal seam mining beneath mountainous areas

Deep Underground Science and Engineering, EarlyView.
This study reveals the mechanism of “seesaw‐type” rock bursts during coal mining beneath mountainous areas. The advancing working face induces nonuniform fracturing of the overburden. The detached mountain mass then undergoes a seesaw‐type rotational movement around a shifting pivot, driving the primary fracture through a characteristic “open‐close ...
Chao Zhou, Xueqiu He, Zhenlei Li, Ping Wang, Dazhao Song, Fuxing Jiang, Shan Yin, Anliang Lü, Menghan Wei, Taoping Zhong   +9 more
wiley   +1 more source

Characteristics of mine pressure and roof disaster prevention and control technology on hard and thick roof of working face

Meitan kexue jishu
Mine pressure appears extremely strong during mining in hard and thick roof working faces. The prevention and control of this type of roof disaster has always been a problem that has plagued the safe and efficient production of working faces in my ...
Gang XU, Zhen ZHANG, Zhengjie LI, Yanjun FENG, Chunhui ZHANG, Jisheng XUE, Qianjin LIU, Xingyu LIN, Rongshan MA   +8 more
doaj   +1 more source

Building resilience in urban settlements through Green Roof retrofit.

, 2016
The opening chapter will set out the background and principal focus for the proposed book. The book covers all commercial land uses and includes exemplars from all three continents and several global regions.
Sara Wilkinson, Dixon, TD, Wilkinson, SJ, Tim Dixon   +3 more
core   +1 more source

Exponentially‐constrained Gaussian mixture model for quantifying vertical development of water‐conducting fracture zones in lithologically stratified mining roofs

Deep Underground Science and Engineering, EarlyView.
This study proposes an exponentially‐constrained Gaussian mixture model (EcGMM) to quantify vertical fracture heterogeneity in stratified roof strata. The model integrates a piecewise exponential decay term capturing global stress dissipation with Gaussian components representing localized fracture intensification at lithological interfaces.
Huiqing Yuan, Zhimin Xu, Weixiao Chen, Chenghang Zhang, Shijie Xiong, Yajun Sun   +5 more
wiley   +1 more source

An exploration of improving stability of gob-side entry retained with graded and zoned pressure relief technology: a case study

Scientific Reports
To address the issues of uncertain pressure relief effectiveness and poor control of surrounding rock caused by the composite nature of the roof strata in the gob-side entry retained (GER), as well as significant changes in strata’s thickness and ...
Kun Pan, Wen-jun Ju, Biao Hou, Hou-sheng Jia   +3 more
doaj   +1 more source

Study on the Tensile Failure Characteristics and Energy Calculation Model of Coal Seam Hard Roof Considering the Mining Speed

Applied Sciences
To reveal the influence mechanism of mining speed on roof fracture-type rockburst, the Brazilian split technique combined with acoustic emission monitoring technology was employed to study the effects of loading rates on the tensile failure ...
Wenlong Li, Shihao Tu, Tongbin Zhao
doaj   +1 more source

League-ally Speaking, 1944

League-ally Speaking was a newsletter published by the Toledo League for the Hard of Hearing in Toledo, Ohio. Incorporated in 1920, the organization was also an agency of the Toledo Community Chest. In 1947 the organization changed its name to the Toledo
Toledo League for the Hard of Hearing
core