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Investigating the Impact of Short Burden and Spacing on Blasting Output in Zeberced Quarry 调查泽贝塞德采石场爆破产出中短装药量和间距的影响
Pub Date : 2024-01-09 DOI: 10.4028/p-wqqb0d
Mumini Babatunde Saka, Sunday Oluwafemi Ayoola, Mohd Hazizan Mohd Hashim
Blasting has been adjudged as the cheapest method of hard rock fragmentation. The itinerary of rock breakage through blasting in open pit mines is a complex portent which is measured via various variables and parameters. This research investigates the impact of short burden and spacing on blasting output with the aim of establishing a more suitable and economically viable approach. Trials and proposed methods were adopted to investigate blasting geometry results. Results obtained showed that the trials method of 1.2 m by 1.2 m and proposed blasts method of 2.0 m by 2.0 m burden and spacing at 9m depth, covered areas were 80.64 m2 and 99.36 m2 respectively, while at 12 m depth with same blasting geometry covered 224 m2 and 276 m2 respectively. The first trial and proposed blasts methods using burden and spacing of 1.2 m by 1.2 m produced 2,583.71 tons and 2,387.62 tons respectively. Hence, with the use of 2.0 m by 2.0 m burden and spacing, the blasts operations produced 7,176.96 tons and 6,632.28 tons respectively. Meanwhile, the results revealed that, short burden (≤ 1.2 m by 1.2 m) threatens safety in which flyrocks are spawned and it’s dangerous to equipment and personnel, at the same time, the areas covered, quantity produced (i.e. volume) and the tonnage were small compared to the engineering control methods. However, it was found that the trials blast methods were not economically worthwhile in terms of explosive consumption compared to the proposed measure of the geometry.
爆破被认为是最廉价的硬岩破碎方法。露天矿爆破破岩的过程是一个复杂的过程,需要通过各种变量和参数来测量。本研究调查了短药量和间距对爆破产量的影响,旨在确定一种更合适、更经济可行的方法。采用试验和建议的方法来研究爆破几何结果。结果表明,在 9 米深度采用 1.2 米乘 1.2 米的试验方法和 2.0 米乘 2.0 米的建议爆破方法,覆盖面积分别为 80.64 平方米和 99.36 平方米,而在 12 米深度采用相同的爆破几何形状,覆盖面积分别为 224 平方米和 276 平方米。首次试验和建议的爆破方法使用 1.2 米乘 1.2 米的载荷和间距,分别产生 2,583.71 吨和 2,387.62 吨。因此,在使用 2.0 米乘 2.0 米的装载和间距时,爆破作业的产量分别为 7 176.96 吨和 6 632.28 吨。同时,试验结果表明,短药量(≤ 1.2 米乘 1.2 米)会产生飞石,威胁安全,对设备和人员造成危险,同时,与工程控制方法相比,覆盖面积、生产量(即体积)和吨位都较小。然而,试验结果表明,就炸药消耗量而言,试验爆破方法与所建议的几何尺寸测量方法相比并不划算。
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引用次数: 0
Intelligent Surveillance Using Robot Eye and Sensor System 基于机器人眼和传感器系统的智能监控
Pub Date : 2023-10-13 DOI: 10.4028/p-4yneed
Puchala Jaswanth Phaneendra Swamy, B. YeswanthKumar Reddy, K. Chandrasekhar
Majority of the advancements, which have been made in the field of robotics are employed in household applications. Surveillance systems are used in guarding and security applications of household and workplaces. This paper presents an advanced surveillance system which integrates sensor system, robot technology and intelligent programming. Robotic surveillance system can be used to replace human guards in dangerous surveillance conditions. Several robots have been developed to assist in these operations. But the full scale employment of robots in crucial fields such as surveillance, security in defence industries and military bases is very limited. The system's overall structure is described, along with descriptions of each component. The robotic system consists of robot eyes, which are capable of sensing an object through IR sensor capability. This robotic system helps in the identification of human presence and alerting respective owners. These operations, performed by the robotic system are achieved using sensors, several number of servo motors, Arduino microcontroller. These components are placed in their respective locations, within a body which is fabricated using the 3D printing technology. The sensors in the robotic system capture the movements of objects. The robotic eyes are fitted with cameras which capture the movements. The robotic system is programmed in such a way that the robotic eyes, move in the direction of object which has been sensed by the sensors and focus on it. If there are multiple moving objects, then one robotic eye focuses on one object, while the other robotic eye focuses on another object. The captured surveillance footage can be viewed through a monitor connected to the robotic system.
在机器人领域取得的大多数进步都应用于家庭应用。监视系统用于家庭和工作场所的守卫和安全应用。本文介绍了一种集传感系统、机器人技术和智能编程于一体的先进监控系统。机器人监控系统可以在危险的监控条件下取代人类警卫。已经开发了几种机器人来协助这些操作。但机器人在监视、国防工业和军事基地安全等关键领域的全面应用非常有限。描述了系统的总体结构,以及每个组件的描述。机器人系统由机器人眼睛组成,机器人眼睛能够通过红外传感器感知物体。这个机器人系统有助于识别人类的存在,并提醒各自的主人。这些操作由机器人系统通过传感器、多个伺服电机、Arduino微控制器来实现。这些部件被放置在各自的位置,在使用3D打印技术制造的身体内。机器人系统中的传感器捕捉物体的运动。机器人的眼睛上装有摄像头,可以捕捉动作。机器人系统的编程方式是这样的:机器人的眼睛,沿着传感器感应到的物体的方向移动,并聚焦在物体上。如果有多个移动物体,那么一只机器眼聚焦在一个物体上,而另一只机器眼聚焦在另一个物体上。可以通过连接到机器人系统的监视器查看捕获的监控录像。
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引用次数: 0
Technical Implementation of the Concept of Using Gel-Forming Systems to Protect Tanks with Oil Products from Thermal Effects of a Fire 使用凝胶成型系统保护油品储罐免受火灾热效应影响的技术实现
Pub Date : 2023-10-13 DOI: 10.4028/p-5bokza
Alexander Savchenko, Oleksii Basmanov, Serhii Hovalenkov
The work theoretically substantiated and practically implemented the technical solution for supplying the components of gel-forming system (GFS). This allows implementing the concept of using gels to protect tanks with oil products from thermal emission. The response time in case of fire at the unloading-loading racks is determined. Criteria for supplying GFS components for cooling the walls of railway tanks have been developed. The ejection method for supplying GFS components is defined as promising. A device that allows supplying GFS components without structural changes in standard firefighting equipment has been developed and manufactured.
研究工作从理论上证实并在实践中实现了成胶系统(GFS)部件供应的技术方案。这使得使用凝胶保护油品罐免受热排放的概念得以实现。确定了装卸架发生火灾时的反应时间。为铁路储罐壁冷却提供GFS部件的标准已经制定。提供GFS组件的弹射方法被认为是有前途的。已经开发和制造了一种设备,可以在不改变标准消防设备结构的情况下提供GFS组件。
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引用次数: 0
Thermoelastic Analysis of Functionally Graded Cylinder 功能梯度圆柱的热弹性分析
Pub Date : 2023-10-13 DOI: 10.4028/p-wsgbq1
P. Ravi Kumar, Tata Nancharaiah, Bhil Ajay, B. Rajesh, B. Durga Prasad Nayak, I. Jithendra Naga Sai Babu
In the present work, Thermo elastic analysis is performed on a functionally graded cylinder to investigate combined effect of pressure and thermal load. It is assumed that the material of the cylinder is functionally graded in which the properties are vary continuously along the thickness based on a power law function. Results are obtained using Finite element-based software ANSYS. To know the accuracy of the present approach, results are confirmed with available literature. Furthermore, the effect of the temperature rising on the distribution of the displacement and stress for different values of gradation index are investigated in the paper. From the results it is concluded that replacing the traditional material with functionally graded material is helpful in the design of pressure vessels.
本文对一个功能梯度圆柱体进行了热弹性分析,以研究压力和热负荷的联合效应。假设圆柱体的材料是功能梯度的,其性能根据幂律函数沿厚度连续变化。利用基于有限元的ANSYS软件进行计算。为了了解本方法的准确性,用现有文献证实了结果。此外,本文还研究了不同级配指标下升温对位移和应力分布的影响。结果表明,用功能梯度材料代替传统材料有助于压力容器的设计。
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引用次数: 0
Creation of Equipment for Testing Roofs for Resistance to External Fire Influence 屋顶抗外部火灾影响测试设备的研制
Pub Date : 2023-10-13 DOI: 10.4028/p-umon0q
Taras Samchenko, Oleksandr Dobrostan, Viktor Pokaliuk, Roman Chernysh
This paper examines and analyzes the domestic and foreign regulatory framework, guidelines and technical documents, information brochures, manuals, handbooks, test reports and other literary sources as well as information on the Internet. In the countries of the European space, fire safety requirements have been established for roofs and roofing materials, both for roofing materials and for roofs as part of structures, which helps to limit the spread of fire in buildings and structures during a fire. It has been proven that there is a need to create equipment for testing resistance to external fire exposure in accordance with DSTU CEN/TS 1187:2016 (method 2) of coverings of buildings (roofs) and establishing fire classification according to DSTU EN 13501-5:2016. A registration certificate, a technical description, an operating manual, and a program and methodology of the test bench verification have been developed. The initial verification of the test bench was carried out and it was put into operation. Approbation of the test method was carried out on the created test bench through experimental studies of five types of roofing materials being widely used on construction works in Ukraine using two bases (substrates) of combustible and non-combustible materials at air flow speeds of 2 m/s and 4 m/s above the specimen surface. According to the results of this work, it was established that the maximum relative deviation of the result of measuring the length of the damaged (charred) part of the specimens was in the range of 1.2 % to 23.3 % for the roof and 0.7 % to 27.5 % for the base.
本文对国内外的监管框架、指南和技术文件、信息手册、手册、手册、测试报告等文献资料以及互联网上的信息进行了考察和分析。在欧洲空间的国家,已经建立了屋顶和屋顶材料的消防安全要求,包括屋顶材料和屋顶作为结构的一部分,这有助于在火灾期间限制建筑物和结构中的火灾蔓延。事实证明,有必要根据DSTU CEN/TS 1187:2016(方法2)对建筑物(屋顶)覆盖物进行抗外部火灾暴露测试,并根据DSTU EN 13501-5:2016建立火灾分类。已编制了注册证书、技术说明、操作手册以及试验台验证的程序和方法。对试验台进行了初步验证,并投入运行。通过对乌克兰建筑工程中广泛使用的五种屋面材料的实验研究,在试样表面以上2米/秒和4米/秒的空气流速下,使用可燃和不可燃材料两种基材(基材),在所创建的试验台上对测试方法进行了认可。根据试验结果,确定了试件损伤(烧焦)部分长度测量结果的最大相对偏差在顶部为1.2% ~ 23.3%,底部为0.7% ~ 27.5%。
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引用次数: 0
Machines and Technological Equipment 机器和技术设备
Pub Date : 2023-10-13 DOI: 10.4028/b-ozpun1
V. Andronov, Y. Otrosh, Tata Nancharaiah, Janapati Laxmi Lalitha
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引用次数: 0
Increasing the Efficiency of Extinguishing Fires in a Pressurized Space due to the Adhesive Properties of Gel-Forming Fire Extinguishing Compounds 凝胶状灭火化合物的黏附特性提高了加压空间中灭火的效率
Pub Date : 2023-10-13 DOI: 10.4028/p-kyw25j
Konstantin Ostapov, Yurii Senchykhin, Vadym Avetisian, Igor Kirichenko
For operational extinguishing of fire-hazardous equipment under a subway car, a modernized under-weight extinguishing trolley is proposed. For supplying components of gel-forming compositions Na 2 O·2,7SiO 2 + NH 4 H 2 PO 4 sprayers of the "segener wheel" type were used. This made it possible to create a finely dispersed fog of gel-forming compounds under the subway car, ensuring uniform and stable adhesion of the gel layers to all surfaces under the car. When conducting experimental studies on the extinguishing of model fires, which are close in their configuration to a sub-weighted space, the effective parameters of the dispersion of drops of gel-forming compositions in 1,6 mm were determined. Uniformly stable adhesion of gel-forming compositions when finely dispersed allowed to reduce the consumption of fire extinguishing agent by at least 25% compared to previously used technical solutions.
针对地铁车厢下火灾危险设备的操作灭火,提出了一种现代化的轻重量灭火台车。为提供形成凝胶的组分,采用了“轮”式的na2o·2,7 sio2 + nh4 h2po4喷雾器。这使得在地铁车厢下形成精细分散的凝胶状化合物雾成为可能,确保凝胶层均匀稳定地粘附在车厢下的所有表面。在模拟火灾的灭火实验研究中,模型火灾的结构与子加权空间接近,确定了凝胶形成成分滴在1,6 mm内分散的有效参数。与以前使用的技术解决方案相比,当精细分散时,凝胶形成组合物的均匀稳定粘附允许减少灭火剂的消耗至少25%。
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引用次数: 0
Investigation on Generative Designs for Fast Connector Socket (FCS) Using High-Strength Low-Alloy (HSLA) Steel 高强度低合金(HSLA)钢快速连接器插座(FCS)生成式设计研究
Pub Date : 2023-10-13 DOI: 10.4028/p-ji7ngu
Varra Narayana, B. Sreenivasa Kumar Reddy, V. Venugopal Reddy
This study appears to focus on the application of metal additive manufacturing and generative designs to create more efficient and sustainable metallic components. The methodology developed in this study takes a comprehensive approach, from component selection to validation of outputs, which can lead to more efficient use of metallic parts in the future. Here CATIA V5 R20 used to create three new models of a fast connector socket (FCS) components, and then using ANSYS Workbench 16.0 apply the working load limit of 4.5 ton load with AISI 4142 380 qt steel alloy material used to the models to analysis. The Autodesk Fusion 360 software was then used to create generative designs for the fast connector socket models, which aimed to reduce mass, size, and material of the model while maintaining its effectiveness. The generative design approach used in this study is inspired by nature's evolutionary design process and considers production processes and cost restrictions. This approach can lead to the creation of more efficient and sustainable metallic components that can be used in various applications, including mechanical, marine, mining, construction, load lifting, pulling, and holding. Overall, this study highlights of the potential benefits. The comprehensive methodology used in this study can be applied to other metallic component designs to improve their efficiency and sustainability.
这项研究似乎集中在金属增材制造和生成设计的应用上,以创造更高效和可持续的金属部件。本研究中开发的方法采用了从组件选择到输出验证的综合方法,这可以在未来更有效地使用金属部件。本文采用CATIA V5 R20创建了三种新型快速连接器插座(FCS)组件的模型,然后利用ANSYS Workbench 16.0应用4.5吨的工作载荷极限载荷,用AISI 4142 380 qt钢合金材料对模型进行了分析。然后使用Autodesk Fusion 360软件为快速连接器插座模型创建生成设计,旨在减少模型的质量、尺寸和材料,同时保持其有效性。本研究中使用的生成设计方法受到自然进化设计过程的启发,并考虑了生产过程和成本限制。这种方法可以创造出更高效和可持续的金属部件,可用于各种应用,包括机械、船舶、采矿、建筑、起重、牵引和保持。总的来说,这项研究强调了潜在的好处。本研究所采用的综合方法可应用于其他金属部件的设计,以提高其效率和可持续性。
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引用次数: 0
Improvement of the Prototype of the Compressed Air Foam System and its Testing 压缩空气泡沫系统原型的改进及其试验
Pub Date : 2023-10-13 DOI: 10.4028/p-sj8kwy
Anatolii Kodrik, Oleksandr Titenko, Stanislav Vinogradov, Stanislav Shakhov
The prototype of the compressed air foam system was improved based on the evaluation of the numerical parameters obtained with the help of the developed mathematical model of the foam generation process and the pneumatic-hydraulic scheme. The prototype provides the possibility of foam generation both in autonomous mode, due to the installation of cylinders with compressed gas, and in stationary mode, due to the supply of compressed air from an external source. This allows the use of an improved model of the compressed air foam system both in stationary mode (dry pipes, gas stations, etc.) and for use on heavy and light fire trucks, which is important for large cities. Testing of the improved prototype of the system for extinguishing model fires was carried out. The system provides extinguishing of model fires of class 183 B and 144 B when using both a general-purpose foaming agent and a special film-forming foaming agent. When using a film-forming foaming agent, the extinguishing time was reduced by 1.75 times, the consumption of fire extinguishing solution by 1.47 times. But at the same time, it should be taken into account that the cost of the film-forming foaming agent Sofir (sofirafff 6 %) is more than 3.2 times the cost of the general-purpose foaming agent Sofir. The effectiveness of the improved model in extinguishing class A fires was also confirmed. The autonomous compressed air foam system ensures extinguishing of a class 4 A model fire in 90 seconds. Dry foam with a factor of 14 is noted to be more effective in extinguishing solid combustible substances.
根据建立的泡沫生成过程数学模型和气动-液压方案,对得到的数值参数进行了评价,改进了压缩空气泡沫系统原型。由于安装了装有压缩气体的钢瓶,在自动模式和固定模式下,由于外部源提供压缩空气,该原型提供了产生泡沫的可能性。这允许在固定模式(干管道,加油站等)和重型和轻型消防车上使用压缩空气泡沫系统的改进模型,这对大城市很重要。对改进后的系统原型进行了模型火灾灭火试验。当使用通用发泡剂和特殊成膜发泡剂时,该系统提供183b类和144b类模型火灾的灭火。当使用成膜发泡剂时,灭火时间减少1.75倍,灭火溶液消耗减少1.47倍。但同时也要考虑到成膜发泡剂Sofir (sofiraff6 %)的成本是通用发泡剂Sofir成本的3.2倍以上。改进后的模型在扑灭A类火灾中的有效性也得到了证实。自动压缩空气泡沫系统确保在90秒内扑灭4a级火灾。系数为14的干泡沫在扑灭固体可燃物质方面更为有效。
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引用次数: 0
Research and Selection of Optimal Hydrodynamic Parameters of Rotary Cavitation Devices for Processing Oil Blends and Distillates 混馏油处理旋转空化装置最佳流体动力参数的研究与选择
Pub Date : 2023-10-13 DOI: 10.4028/p-bbedy2
Inna Lavrova, W.Saeed Ammar, Sergiy Copylov, Vladyslava Vladymyrenko, Anna Cherkashina
This article presents the results of experimental processing of hydrocarbons (petroleum and mixtures based on them) on a laboratory stand. Cavitation treatment was carried out in flow-type rotary-pulsation apparatus with different impeller diameters and rotor rotation frequencies. The aim of the work was to determine the most effective processing mode for oil blends and distillates within the framework of laboratory experiments.
本文介绍了在实验室台架上加工碳氢化合物(石油及其混合物)的实验结果。对不同叶轮直径和转子旋转频率的流动型旋转脉动装置进行了空化处理。这项工作的目的是在实验室实验的框架内确定油混合物和馏分油最有效的加工模式。
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引用次数: 0
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Applied Mechanics and Materials
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