Research on Surrounding Rock Stability Affected by Surrounding Rock Pressure and Rock Fracture under Blasting Vibration Load Action by Qingjie Qi, Shuai Huang, Yingjie Liu

“…With the increase of the damage degree of the roadway, signal energy in the frequency domain is transmitted from the primary to the secondary frequency band and signal energy is distributed more dispersedly. …”
Get full text

Influence of Multistage Target Temperature and Cyclic Loading/Unloading on the Permeability of Polypropylene Fiber Concrete by Peishan Cen, Erjian Wei, Kunyun Tian

“…The gas permeability at 200°C and 280°C was 246 times and 350 times that at 22°C, respectively. (2) The damage degree of the matrix strength structure increases during cyclic loading and unloading, and the permeability loss rate during cyclic loading and unloading is 1.24∼1.57 times that of single loading and unloading. (3) The high target temperature leads to pore structure damage of the matrix, which not only affects the permeability of the matrix but also affects the strength structure of the matrix. …”
Get full text

Target IOP as a measure of glaucoma surgery efficacy by S. Yu. Petrov

“…The gradation of glaucoma surgery effect and target IOP level depending on optic nerve damage degree as well as statistical principles of scientific data presentation are discussed. …”
Get full text

Improvement of Anti-Collision Performance of Concrete Columns Using Bio-Inspired Honeycomb Column Thin-Walled Structure (BHTS) by Jingbo Wang, Hongxiang Xia, Shijie Wang

“…In order to avert the impairment of reinforced concrete bridge piers (RCBPs) under the impact of vehicles, three kinds of Mg–Al alloy AlSi10Mg anti-collision structures designed by selective laser melting (SLM) printing were tested by the numerical simulation method in this study: an ultra-high performance concrete (UHPC) anti-collision structure, a bio-inspired honeycomb column thin-walled structure (BHTS) buffer interlayer, and a UHPC–BHTS composite structure were used to reduce the damage degree of RCBPs caused by vehicle impact. In accordance with the prototype configuration of the pier, a scaled model with a scale ratio of 1:10 was fabricated. …”
Get full text

Study on Mechanical Properties and Damage Evolution Law of Secondary Destruction Induced by Simultaneous Unloading after the Peak of the Curve of Sandstone by Xiao Fukun, Liu Gang, Cheng Qianlong

“…The plasticity coefficient shows the trend of increasing first and then decreasing. (5) The damage degree of the second rupture is greater than the first rupture.…”
Get full text

Study on the Mining Pressure Law of Tunneling Roadway in Coal Pillar of Lower Coal Seam in the Mining Hollow Area by Donghai Jiang, Hui Wang, Tongyang Zhao, Kaixin Zhang, Jianrong Liu, Jiangwei Liu, Hao Lan, Yuantao Yao

“…The results show that from the perspective of the damage degree and stress concentration of the upper coal seam floor, the goaf of the upper coal seam and the remaining coal pillars have no obvious influence on the new roadway in the lower coal seam coal pillar, and the new roadway has no obvious influence on the two existing roadways in the same coal seam. …”
Get full text

Experimental Study on Dynamic Response and Damage Evolution of Coal under Shocks by Multiple High-Pressure Air Blasting by Shaoyang Yan, Xiaolin Yang, Huaibao Chu, Jinxing Wang, Chang Wang, Mengfei Yu

“…With the increase of distance, the internal damages of the specimens in the middle and far zones are mainly driven by the stress wave and the high-pressure air, and the strain peak, vibration velocity, and damage degree gradually decrease. (2) With the increase of shock times in HPAB tests, the stress wave attenuation index decreases at first and then increases, and the damages degree of the middle and far zones increase slowly in the first few shocks and then increase rapidly. …”
Get full text

A Study on Cut Blasting with Large Diameter Charges in Hard Rock Roadways by Bing Cheng, Haibo Wang, Qi Zong, Ying Xu, MengXiang Wang, Qiangqiang Zheng, Chengjie Li

“…The stress wave evolution of wedge cut was visualized using numerical simulations, which confirmed that the use of large diameter charges in cut holes increases the stress field intensity in the cut cavity and hence increases the damage degree of the rock mass. In this study, the use of a large diameter charge for cut blasting increased the average footage by 0.30 m, and the average utilization rate of blast holes increased by 12.5%. …”
Get full text

Effect of Multiple Hole Distribution and Shape Based on Particle Flow on Rocklike Failure Characteristics and Mechanical Behavior by Zhiguo Xia, Ning Jiang, Huisan Yang, Liu Han, Haiyang Pan, Zhenhua Zhao, Quanlin Feng

“…The results show that the existence of holes reduces the peak stress, peak strain, and elastic modulus of the sample, and different shapes of holes and different arrangement patterns have different effects on the mechanical properties and damage degree of the sample and significantly affect the horizontal orientation model. …”
Get full text

Deformation, failure, and crack propagation characteristics of fissured red sandstone under uniaxial compression condition by Sijiang Wei, Wenyu Wang, Dahua Ren, Meng Wang, Lei Wang, Wenlong Shen, Jichun Kang, Yushun Yang

“…Simultaneously, the damage degree decreases. When α > 15°, the peak strain increases with the increase in α. …”
Get full text

Research on damage recognition of concrete beams based on embedded piezoelectric sensors by Bin Fu, Pengcheng Li, Youjia Zhang, Xu wang, Shuqin Zheng, Yanru Wang

“…Subsequently, the designed embedded piezoelectric sensor was buried in the concrete specimen, and the stress wave signal of the concrete specimen was monitored based on the fluctuation method to investigate the variation rule of signal amplitude with the damage degree. Finally, a new concrete beam crack damage index Id is proposed based on wavelet packet energy decomposition, and combined with Id to estimate the depth of concrete beam crack development, and the location of concrete beam crack damage is approximated and localized by reading the monitoring unit in which Id has changed.…”
Get full text

Retinoic Acid Receptor Gamma (RARγ) Promotes Cartilage Destruction through Positive Feedback Activation of NF-κB Pathway in Human Osteoarthritis by Yue-Wei Yu, Si-Yang Li, Lin-Jun Zhang, Qian-Liang Wang, Zhong-Guo Liu, Qing-Zhi Chen, Hong-Yu Song, Dong-Yan Shen, Jun Yan

“…Here, we demonstrated that the RARγ was highly expressed in chondrocytes of OA patients compared with healthy people and was positively correlated with the damage degree of cartilage in OA. Cytokine TNF-α promoted the transcription and expression of RARγ through activating the NF-κB pathway in OA cartilage. …”
Get full text

Study on time–frequency features of induced charge signals during the damage and failure process of coal medium by Jinguo Lyu, Shixu Li, Yishan Pan, Zhi Tang, Xuebin Wang, Zhanpeng Xue, Yanli Zhang, Yanfang Qiao

“…The available induced charge is positively correlated with the degree of coal damage, which can perform the damage degree of coal mass, providing a new approach to evaluate the stability of roadway surrounding rocks.…”
Get full text

Study on the Stability of Surrounding Rock of Underground Circular Cavern Based on the Anchor Reinforcement Effect by Shuancheng Gu, Pan Zhou, Wei Sun, Chunhui Hu, Zhi Li, Chao Wang

“…First, the composite bearing structure composed of the anchor and surrounding rock was defined as the surrounding rock reinforcement body by using the homogenization method, and a new method for evaluating the stability of surrounding rock by the surrounding rock reinforcement body deformation and damage degree was proposed. Second, based on the anchor reinforcement effect, the expression of the physical-mechanical parameters of the surrounding rock reinforcement body was deduced, and the analytical solution of stress and displacement of the surrounding rock reinforcement body was obtained. …”
Get full text

A Study of the Anchorage Body Fracture Evolution and the Energy Dissipation Rule: Comparison between Tensioned Rock Bolts and Torqued Rock Bolts by Bowen Wu, Xiangyu Wang, Jianbiao Bai, Shuaigang Liu, Guanghui Wang, Guanjun Li

“…The pretension load had a positive relationship with elastic strain energy and a negative relationship with the anchorage body damage degree. Based on the above research, the transport roadway of the working face 6208 in the Wangzhuang Coal Mine selected tensile rock bolts to establish the high-performance anchorage body. …”
Get full text

Numerical Simulation of Pipeline-Pavement Damage Caused by Explosion of Leakage Gas in Buried PE Pipelines by Yang Zhuohua, Ye Qing, Jia Zhenzhen, Li He

“…However, the buried depth is of great influence on the damage degree of pavement. When the buried depth increases from 0.9 m to 1.5 m, the pavement deformation can be reduced effectively. …”
Get full text

The role of potential oxidative biomarkers in the prognosis of intracerebral hemorrhage and the exploration antioxidants as possible preventive and treatment options by Jiayong Yao, Xiaohong Dai, Xueping Yv, Lei Zheng, Jia Zheng, Binglin Kuang, Wei Teng, Weiwei Yu, Mingyue Li, Hongtao Cao, Wei Zou, Wei Zou

“…In this paper, we aim to determine how changes in oxidative stress biomarkers indicate the damage degree of cerebral hemorrhage, and to explore and summarize potential treatments or interventions. …”
Get full text

A New Experimental Approach for Hydraulic Fracturing Fluid Damage of Ultradeep Tight Gas Formation by Hui Li, Zhiliang Liu, Ninghong Jia, Xu Chen, Jing Yang, Lele Cao, Ben Li

“…HCP is the primary damage mechanism for the tight sandstone. And the damage degree of the rock matrix cores is higher than that of the naturally fractured core. …”
Get full text

Features of development and harmfulness of the berry bug in grain crops in the north-west of Russia by A. M. Shpanev, A. V. Kapustkina

“…Thus, despite the high density of winter triticale crops with berry bug in the conditions of 2022, the proportion of damaged caryopses and their damage degree, as well as the total yield loss, turned out to be low, which means that the use of insecticides was inappropriate.…”
Get full text

Role of plant viral infection in the inhibition of potato immune responses to the damage caused by leaf-eating pests by О. A. Sobko, М. V. Ermak

“…The progression of plant viral infection scored about two points on varieties Nakra and Severnyi with a damage degree of one point. Variety Dal'nevostochnyi was the least susceptible to plant viral infection and the degree of damage was minimum as well.…”
Get full text