With the rapid development of drone technology,oblique photogrammetry has become an important technical means in mining surveying and mapping.This study aims to explore the application of unmanned aerial vehicle oblique photogrammetry technology in mining surveying,conduct case analysis on actual surveying tasks in mining areas,and verify the advantages of this technology compared to traditional surveying methods.Traditional mining surveying often faces problems such as complex terrain,poor visibility conditions,and high costs.However,unmanned aerial vehicle(UAV)oblique photogrammetry technology,with its flexibility,accuracy,and efficiency,has shown significant advantages in overcoming these challenges.By using drones equipped with multi lens cameras for aerial photography,combined with 3D modeling,data encryption processing and other technologies,terrain data of mining areas can be efficiently and accurately obtained,providing important basis for post management,planning and decision-making of mining areas.
High-entropy alloys (HEAs) have attracted much attention in the field of penetrating materials due to their excellent mechanical properties and superior penetration ability. In this paper, the penetration experiments of WFeNiMo HEAs projectile and Q235 projectile impacting steel target at high speed are carried out by using two-stage light gas gun. The velocity of impacting is from 1186 to 1413 m/s. At the same time, the parameters of Johnson–Cook constitutive equation considering temperature and strain rate effects are determined by dynamic and static mechanical performance tests, and numerical simulation is carried out by AUTODYN-3D. By comparing numerical simulation and experimental results, the penetration characteristics of WFeNiMo HEAs are analyzed on the temperature, stress and damage morphology of the two materials when the projectile hits the steel target at high speed. The experimental results show that the deformation and shear failure mainly occur in the WFeNiMo HEAs projectile head, and the projectile head is in a sharp state during the penetration process. WFeNiMo HEAs have strong adiabatic shear sensitivity and are prone to adiabatic shear phenomenon, showing “self-sharpening” penetration characteristics.
红花脑矿区锡矿是云山岩体周边地区新发现的一处小型矿床,它与桐木坑、邓家山矿区有着同样优越的成矿条件,矿(化)体类型有花岗岩原生节理构造蚀变岩型、花岗岩内接触带蚀变岩型、断裂构造蚀变岩型三种,结合矿化类型探讨其矿床成因,为云山远景区锡矿找矿早日取得重大发现,提供一点个人观点.
Advanced Materials Science and Technology is a peer-reviewed open access journal published semi-annual online by Omniscient Pte. Ltd. The journal covers the properties, applications and synthesis of new materials related to energy, environment, physics, chemistry, engineering, biology and medicine, including ceramics, polymers, biological, medical and composite materials and so on.
In order to alleviate the impact of current mineral development work on the surrounding ecological environment,improve ecosystem stability,and promote local economic development,this article takes a metal mine as an example to study the types of geological disasters caused by the mining process of a metal mine,analyzes the environmental problems that are prone to occur in metal mine mining,and proposes the application of metal mine exploration technology,metal mine disaster reduction technology,and early warning system The measures for controlling slope waste and soil erosion,as well as geological disaster prevention and geological environment protection in mines,are aimed at providing reference for relevant personnel.
