scholarly journals Vertical mineralization interval and forecast of the position of an ore-body in the Alsar Sb-As-Tl deposit, FYR Macedonia

2011 ◽  
pp. 119-129 ◽  
Author(s):  
Rade Jelenkovic ◽  
Blazo Boev
Keyword(s):  
Control Method ◽  
Ground Surface ◽  
Mineral Deposit ◽  
Depth Interval ◽  
Velocity Control ◽  
Ore Body ◽  
Ore Bodies ◽  
Central Deposit ◽  
Recent Position ◽  
Geomorphological Analysis

Establishing a vertical interval of mineralization is a complex geological task based on the knowledge of many parameters and quantities that describe the genesis of an ore deposit. It is particularly important to know the time and the primary depth of the formation of an ore-body and its recent position. The establishment of the vertical mineralization interval is considered in this work on the example of the Alsar Sb-As-Tl mineral deposit. The research methods used were geomorphological analysis (the principal exploration method), measurement of cosmogenic radioactive (10Be, 26Al) and stable (3He, 21Ne) nuclides to determine the erosion velocity (control method) and comparison of the obtained results with the geological exploration data from operative mine workings. A detailed geological study of the formation of the Alsar deposit preceded the research. The research data are the following: depth interval of the ore-body is 10-50 m below the present ground surface; average level of erosion in the Alsar deposit area is 20-80 m over a period of 106 years (Ma), or about 100-400 m from the beginning of the volcanic activity to the present day (?5 Ma); thickness of the eroded rock complex over the ore bodies from the beginning of the hydrothermal alteration and the formation of ore bodies (4.31 Ma) to the present is ?150 m (Crven dol), or ?230 m (central deposit); the palaeointerval of the formation of the ore-body is 230 m (200-430 m); and, finally, the potentially mineralized interval is deep, from 10 m to 280 m below the surface.

scholarly journals Using Topographic Advantages in Formulating a Strategy to Access Ore Bodies at Ban Phuc Nikel Mine

2020 ◽  
Vol 174 ◽  
pp. 01013
Author(s):  
Hung Nguyen Phi ◽  
Thang Pham Duc
Keyword(s):  
Underground Mining ◽  
Mineral Deposit ◽  
Access Method ◽  
Near Surface ◽  
Ground Support ◽  
Mining Technique ◽  
Ore Body ◽  
Ore Bodies ◽  
Gain Access ◽  
Transport Potential

There are various types of underground mining that are categorized based on the kind of shafts used, the technique of extraction and the process used to get to a deposit. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. To start the mining, the first step is to make the path to go down. Development, the work of opening a mineral deposit for exploitation is performed. With it begins the actual mining of the deposit. Access to the deposit must be gained either by stripping the overburden, which is the soil and/or rock covering the deposit,to expose the near- surface ore for mining or by excavating openings from the surface to access more deeply buried deposits to prepare for underground mining. The type of underground mining technique used is typically based on the geology of the area, especially the amount of ground support needed to make mining safe. When using to exploit ore body by underground mining method, the textbook guide in universities of Vietnam had had 4 main strategies include: access by horizontal tunnel lines, access by incline shaft, vertical shaft and combination of above access method. In this study, we developed a solution outside of four above approaches, to take advantage of the topography, transport potential energy, and advantages when constructing sloped incline, backward from outside to inside.

ON SHALLOW‐HOLE TEMPERATURE MEASUREMENTS—A TEST STUDY IN THE SALTON SEA GEOTHERMAL FIELD

Geophysics ◽  
1977 ◽  
Vol 42 (3) ◽  
pp. 572-583 ◽  
Author(s):  
Tien‐Chang Lee
Keyword(s):  
Numerical Methods ◽  
Ground Surface ◽  
Nonlinear Least Squares ◽  
Geothermal Gradient ◽  
Geothermal Field ◽  
The Other ◽  
Temperature Measurements ◽  
Salton Sea ◽  
Depth Interval ◽  
Average Value

Shallow‐hole (<13 m) temperature measurements made at various depths and/or times may yield reliable values of geothermal gradient and thermal diffusivity if the groundwater table is shallow (a few meters) such that the effect of time‐dependent moisture content and physical properties is negligible. Two numerical methods based on nonlinear least‐squares curve fitting are derived to remove the effect of annual temperature wave at the ground surface. One method can provide information on the gradient and diffusivity as a function of depth while the other gives average value over the depth interval measured. Experiments were carried in six test holes cased with 2 cm OD PVC pipes in the Salton Sea geothermal field. A set of 5 to 7 thermistors was permanently buried inside the individual pipes with dry sand. Consistent gradient determinations have been obtained with both numerical methods from six monthly observations. By linearly extrapolating the depths to the 100°C and 200°C isotherms from the calculated gradients and mean ground temperatures, we have found good agreement with the nearby deep‐well data for four holes. Discrepancy is found for two holes, one of which is located near the field of [Formula: see text] mud volcanoes and the other near the volcanic Red Hill, reflecting complicated local hydrologic conditions.

scholarly journals A Stabilization Method Based on an Adaptive Feedforward Controller for the Underactuated Bipedal Walking with Variable Step-Length on Compliant Discontinuous Ground

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-16
Author(s):  
Yang Wang ◽  
Daojin Yao ◽  
Jie He ◽  
Xiaohui Xiao
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Ground Surface ◽  
Step Length ◽  
Bipedal Walking ◽  
Level Control ◽  
Stabilization Method ◽  
Feedforward Controller ◽  
High Level ◽  
Adaptive Feedforward

Both compliance and discontinuity are the common characteristics of the real ground surface. This paper proposes a stabilization method for the underactuated bipedal locomotion on the discontinuous compliant ground. Unlike a totally new control method, the method is actually a high-level control strategy developed based on an existing low-level controller meant for the continuous compliant ground. As a result, although the ground environment is more complex, the calculation cost for the robot walking control system is not increased. With the high-level control strategy, the robot is able to adjust its step-length and velocity simultaneously to stride over the discontinuous areas on the compliant ground surface. The effectiveness of the developed method is validated with a numerical simulation and a physical experiment.

Research of Mining Method for Difficult-to-Mine Ore Bodies in Deep Mine

2014 ◽  
Vol 962-965 ◽  
pp. 1041-1046
Author(s):  
Qi Fa Ge ◽  
Xue Sen Sun ◽  
Wei Gen Zhu ◽  
Qing Gang Chen
Keyword(s):  
In Situ Stress ◽  
Mining Method ◽  
Deep Mining ◽  
Deep Mine ◽  
Ore Body ◽  
High In Situ Stress ◽  
Ore Bodies ◽  
Large Panel ◽  
Back Filling

There are many problems such as depth, high in-situ stress, high ground temperature and rockburst proneness etc. in deep mining. And it is an acknowledged and urgent mining technical puzzle about mining method of gently inclined and medium-thick ore bodies. For such an ore body in West wing of Dongguashan copper mine, if we use traditional mining method, it is hard to conquer such difficulties as high in-situ stress, large open area in roof, removal of mined ore by gravity etc. The theory of “large panel and lower sublevel height” will be easy to solve such problems. This paper use numerical technology to analyze and compare the technical and economical effectiveness for different selected mining method and its structure. The sublevel (at a height of 12 m) open stoping with back-filling by extraction in two steps is quite suitable for ensuring safety, increasing efficiency, productivity and reclaiming resource. The selected method is feasible and well worth spread.

scholarly journals Directional and velocity control of active droplets using a rigid-frame

RSC Advances ◽  
2019 ◽  
Vol 9 (69) ◽  
pp. 40523-40530 ◽  
Author(s):  
Masato Yamada ◽  
Hiroki Shigemune ◽  
Shingo Maeda ◽  
Hideyuki Sawada
Keyword(s):  
Control Method ◽  
Velocity Control ◽  
Oil Droplets ◽  
Directional Control ◽  
Rigid Frame

This paper introduces a novel directional control method of self-propelled oil droplets using an exoskeleton frame.

The influence of currents induced in the host rock on electromagnetic response of a spheroid directly beneath a loop

Geophysics ◽  
1981 ◽  
Vol 46 (8) ◽  
pp. 1121-1136 ◽  
Author(s):  
Alexander A. Kaufman
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Asymptotic Expression ◽  
Surrounding Medium ◽  
Electromagnetic Response ◽  
Ore Body ◽  
Ore Bodies ◽  
Integral Equation Approach ◽  
Em Field ◽  
Special Case

A variety of time‐domain and frequency‐domain electromagnetic (EM) methods has come into use in minerals exploration for detection of conductive ore bodies. Because the responses of these various systems differ markedly from one another, the question arises as to which is the most effective for use in discovering a buried, conductive ore body. The question can be posed as follows: What type of exploration system provides the best signal‐to‐noise (S/N) ratio, when signal is defined as the anomalous EM field caused by the presence of a target body and noise is defined as EM responses from the surrounding medium? Analytic solution of the problem is tedious and has not yet been reported in the literature. I describe some results for a special case which reduces the complexity of the problem somewhat. The case treated is that of a conducting spheroid situated directly beneath a source loop. The EM responses caused by currents in the spheroid and in the surrounding medium were computed in both the frequency domain and time domain, using the integral equation approach, supplemented with evaluations of asymptotic expression for various field components. Results show that the transient method provides the best S/N ratio of the methods considered.

Research and Application of the 3D Mathematic Model of Ore-Body Based on Suppac Software - Yunnan White Cattle Factory Silver Polymetallic Mine

2013 ◽  
Vol 868 ◽  
pp. 84-87
Author(s):  
Ying Ling Li ◽  
Jian Guo Gao
Keyword(s):  
Body Position ◽  
Three Dimensional ◽  
Estimation Method ◽  
Mineral Resources ◽  
Mathematic Model ◽  
Mineral Deposit ◽  
Three Dimensional Model ◽  
Ore Body ◽  
White Cattle ◽  
Three Dimensional Models

Three-dimensional models of deposit are the foundation of realizing digital mineral deposit , with the aid of mining software Surpac,it can establish deposit database, the three dimensional model of the mining surface,,orebody and roadway of the yunnan white cow factory silver polymetallic deposit.The 3D model can show the vivid image of the mining topography and geomorphology, ore body position, gallery situation. The ore model of orebody grade founding by kriging can show the distribution change of orebody grade clearly, and finally estimate the amount of ore body. Comparing with the traditional estimation method of exploration report, we can find the estimation of mineral resources by software is accurate.

Study on the Ore-Controlling Structure of Yanglin’ao Tungsten Deposit and the Mineralization Prediction, Hunan Province

2012 ◽  
Vol 524-527 ◽  
pp. 73-80
Author(s):  
Yao Jian Xu ◽  
Ping Zheng ◽  
Man Xiang Huang
Keyword(s):  
Hanging Wall ◽  
Hunan Province ◽  
Formation Mechanisms ◽  
Tungsten Deposit ◽  
Geological Characteristics ◽  
Ore Body ◽  
Ore Bodies ◽  
Sandstone Formation ◽  
Set Up ◽  
Prospecting Prediction

Yanglin’ao tungsten deposit is a typical mesothermal to hyperthermal filling-metasomatism postmagmatic deposit. It is featured with the structure-controlling distribution of ore-body and mineralization; while veinlet-type ore-bodies are particularly situated at the hanging wall of F24(No.24 of Fault Fracture), and the mineralization is especially concentrated below and above the unconformable surface between Proterozoic Banxi slate group and Middle DevonianYanglin’ao sandstone formation. Geological characteristics, structure forms and its formation mechanisms of ore-controlling structure were studied in this paper and a special tectonic-controlled model was initially set up. Furthermore the author also made mineralization prospecting prediction based on structure characteristics.

scholarly journals The Novo Okno copper deposit of olistostrome origin (Bor, Eastern Serbia)

2011 ◽  
pp. 101-109
Author(s):  
Ivan Antonijevic
Keyword(s):  
Land Surface ◽  
Copper Deposit ◽  
Lower Surface ◽  
Mineral Deposit ◽  
The Body ◽  
Parent Rock ◽  
Distinctive Features ◽  
Ore Bodies ◽  
Marine Basin ◽  
Massive Sulphides

The copper deposit Novo Okno, uncovered at present, with non-ore and ore clasts of massive sulphides (from 0.5 to 50 m3 in size), has many distinctive features that indicate its olistostrome origin. The deposit is chaotic in structure, unstratified, with the lower surface unconformable over the underlying parent rock of the basin. It is a lens-like body, with the longer axis directed east and west, variable in thickness from 15 to 28 metres, about 335 metres long and less than 140 metres wide. These and other characteristics of the body indicate a unified, reworked, olistostrome copper deposit formed from primary ore bodies of the Bor mineral deposit and vulcanite, destroyed by volcanic explosion into blocks and rocks of Turonian age and extrusion and concurrent deposition on the land surface. Gravitational massive sliding of the consolidated rocks down the slopes of the volcanic relief and chaotic accumulation of ore and non-ore clasts (olistoliths) in a marine basin evolved in the Upper Turonian and the Lower Senonian.

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