Results 21 to 30 of about 397,228 (314)

Analysis of Support Design in Weak Rock Drift Using a Systematic Approach

Advances in Civil Engineering, 2020
The aim of this study is to develop a systematic approach for support design of weak rock drift based on empirical, analytical, and numerical method, which is employed to estimate weak rock support demand and design support system.
Xingdong Zhao, Shujing Zhang, Huaibin Li, Guoju Chen, Pengqiang Zhang   +4 more
doaj   +1 more source

Recovery of Rare Metals from Superalloy Scraps by an Ultrasonic Leaching Method with a Two-Stage Separation Process

Separations, 2022
Superalloy scraps are deemed as potential unconventional sources of rare metals. In this study, an ultrasonic leaching method with a two-stage separation process was proposed.
Long Wang, Sujun Lu, Jiayuan Fan, Yutian Ma, Juan Zhang, Shiyang Wang, Xiaoyao Pei, Yuan Sun, Guozhi Lv, Tingan Zhang   +9 more
doaj   +1 more source

Coral recruitment enhancement in fish shelter media composed of fly ash and nickel slag on Obi Island, South Halmahera

Depik Jurnal
The reefcube, a modular structure, serves as a primary habitat for fish and aids in the recruitment of new coral. The reefcube is predominantly made from fly ash and nickel slag, by-products of pyrometallurgy process that contain high content of CaO, MgO,
Prasari Riski Hutami, Aldico Satria Ganesa, Jesaya Alfredo Alexandro Karyoto, Windy Prayogo   +3 more
doaj   +1 more source

Indicadores económicos para evaluar la sostenibilidad de la empresa extractiva Materiales de Construcción a través del Método Multicriterio

Ciencia & Futuro, 2022
Se evaluó el desempeño de las variables e indicadores económicos en la empresa extractiva Materiales de la Construcción. La investigación se desarrolló a través de 7 etapas metodológicas que posibilitaron evaluar los principales indicadores de la ...
Dailén González-Martín, Julio Montero-Matos, Gioelkis Espinosa-Batista   +2 more
doaj  

Effects of external dynamic disturbances and structural plane on rock fracturing around deep underground cavern

International Journal of Coal Science & Technology, 2022
The occurrence of disasters in deep mining engineering has been confirmed to be closely related to the external dynamic disturbances and geological discontinuities. Thus, a combined finite-element method was employed to simulate the failure process of an
Fan Feng, Shaojie Chen, Xingdong Zhao, Diyuan Li, Xianlai Wang, Jiqiang Cui   +5 more
doaj   +1 more source

Thermal Conductivity Model Analysis of Unsaturated Ice-Containing Soil

Geofluids, 2022
In cold locales, the thermal conductivity of soil porous media varies according to their composition and the phase state of the substance contained within the pore space.
Qiang Han, Zhiguo Wang, Rui Qin
doaj   +1 more source

Removal and Recycling of Antimony in a Gold Concentrate

Kuangchan zonghe liyong
In this article, antimony was removed from the gold concentratebythe alkali leaching method, and then the recovery of antimony solution was also studied.
Jinquan GUO, Lairong HE, Hailong XI, Caixia CHEN, Tianfei MA, Quan LI   +5 more
doaj   +1 more source

Dynamic and static analysis of a kind of novel J energy-releasing bolts

Geomatics, Natural Hazards & Risk, 2020
Energy-absorbing rockbolt is now recognized as an important support element in deep mines around the world. A novel kind of energy-absorbing bolt called J-bolt was developed, which consists of anchoring (damping) module, deformation module, blending ...
Xingdong Zhao, Shujing Zhang, Qiankun Zhu, Huaibin Li, Guoju Chen, Pengqiang Zhang   +5 more
doaj   +1 more source

Research on condition monitoring and fault diagnosis of intelligent copper ball production lines based on big data

IET Collaborative Intelligent Manufacturing, 2022
With the continuous upgrading and transformation of the intelligentisation of China's manufacturing industry, and in response to the requirements for further intelligentisation of the phosphor copper ball production line proposed by a new electronic ...
Zhongke Zhang, Zhao Li, Changzhong Zhao
doaj   +1 more source

Foro Abierto de la Universidad de Concepción: antecedentes preliminares para una problematización de su intervención patrimonial

Urbe, 2021
El Foro Abierto es el espacio público de la Universidad de Concepción (región del Biobío, Chile) con mayor significación ciudadana. Al estar protegido por su calidad de Monumento Histórico, sus intervenciones deben enmarcarse en guías institucionales ...
Meliza Nickel
doaj   +1 more source