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This study aims to investigate the effects of different modified quinoa proteins (MQP) on the gel quality of silver carp surimi, as well as to explore their feasibility for three‐dimensional (3D) printing. Five different methods were employed to modify quinoa protein, water bath (WB), microwave (MW), ultrasonic (US), microwave followed by ultrasonic (M‐U), and ultrasonic followed by microwave (U‐M), to prepare compound surimi gels (MQPs). The results showed that the addition of quinoa protein improved the gel quality of surimi, while the MQP had an even better effect on enhancing the gel quality. Among them, QP modified by US exhibited a smoother surface, with an expressible water content of 9.78%, gel strength of 22.26 N·mm, and hardness of 27.59 N. The addition of all MQP reduced the cooking loss of surimi, promoted the formation of bound water, and enhanced the G′ and G″ values of MQPs. The characterization of MQP based on molecular driving force revealed that the addition of MQP enhanced the hydrophobic interactions within the surimi gel. This improvement is attributed to the structural changes in quinoa protein induced by the modification process, where the exposure of a large number of hydrophobic groups to water facilitated the formation of a more uniform network structure among the surimi proteins. Additionally, feasibility research on 3D printing of compound products was conducted, revealing that all MQPs exhibited good support and surface smoothness, making them suitable for applications in the field of food 3D printing. Practical Application: This study investigated the effects of quinoa protein addition on the physical properties and mechanism of silver carp surimi under different modification methods, as well as the feasibility of 3D printing. The results demonstrated that incorporating modified quinoa protein improved the quality of the surimi gel. This research expands the range of surimi products and provides a theoretical foundation for the development and production of plant protein‐surimi compound products. Additionally, it contributes theoretical insights into the characteristic application of quinoa protein. [ABSTRACT FROM AUTHOR]

The research progress on optimistic analysis and ultimate bearing capacity of the conventional metal supports, such as mine I-beam, U-shaped steel and concrete filled steel tubes, is summarized. It especially focused on introducing a new type of steel support with corrugated webs. The advantages of steel support with corrugated webs in bearing capacity and economy compared with traditional supports, the global stability bearing capacity and local stability of the steel support structure with corrugated webs in different roadway profiles are introduced herein. It also reviews the research work and achievements on the yieldable connecting configuration, as well as the interaction between the support and the surrounding rock. It can be concluded that the prominent advantages of the support with corrugated web are its high supporting capacity and light weight, which is economical and greatly reducing the labor intensity. The two types of yieldable connecting components (high-strength bolts and wedge sleeves) are developed, which can solve the eccentricity issue of traditional one, besides, the surrounding rock load on the supports can be reduced through connection yielding and pressure relief, which could improve the stability and service life of the steel supports with corrugated webs. The research achievements have vital reference significance to the future development of new support structures for coal mine roadways with rock bursts.

Composite concrete structures are designed to integrate various concrete types at different levels, thereby improving their shear properties. In this paper, the effects of the interfacial keyway, reinforcement ratio, and pouring sequence on the shear strength of concrete-coal gangue concrete interface are studied by experiments and analyses. A total of 10 specimens were made, and the push-off test was carried out. Nonlinear finite element simulation was carried out using ABAQUS, and the influence of keyway angle on crack development was studied based on the extended finite element method (XFEM). It is found that the remarkable tensile and crack stability of engineered cementitious composites (ECC) has a positive effect on the shear strength of the ECC-coal gangue concrete interface. The ultimate shear strength of the interface and the ductility of the interface under shear load are significantly improved by interfacial shear reinforcement. The introduction of an interfacial keyway improves the shear strength of the concrete interface, and the number of keyways has the most significant effect on the interfacial shear strength. The angle between the crack propagation direction and interface will increase with the increase of keyway angle, the simulation results are in good agreement with the experiments. [ABSTRACT FROM AUTHOR]

Based on the newly developed sinking headframe for the deep and large shaft, the finite element model of the full-scale headframe was established by using SAP2000. Through the calculation, the theoretical stress of the headframe at sinking depths of 40 m, 143 m, 223 m, 518 m, 762 m, 1000 m, 1250 m, and 1503 m was obtained and then compared with the field measured stress. The results show that with the increase of shaft sinking depth, the theoretical stress of finite element simulation and the field measured stress of each member of the sheave wheel platform and the headframe increase linearly, and for the maximum member stress in the upper, middle, and lower layers of the headframe, the numerical simulation value is greater than the field measured value and less than the designed steel strength. In other words, under normal working conditions, headframe members are in the elastic stress stage and meet the design requirements, and instability failure of headframe members will not occur. The end-restraint mode of the supporting bars has a great influence on the force of the top member. The reasonable selection of the restraint mode in the simulation is the key to the accuracy of the calculation results. The simulation results well reflect the actual stress of the headframe and provide a reliable guarantee for the follow-up work of the project.

The prebending principle is used to roll the bushing,the gap of the seam can be reduced to a minimum and the fluctuation range of dimension is reduced obviously. The wear-resisting performance of the prebending bushing chain is significantly improved compare with the general bushing chain. The wear is reduced where the bushing contact with the pin,the surface hardness of the bushing is improved under the effect of cyclic hardening.