Long-wall Mining. Long-wall mining is a method in which a 'long', horizontal 'wall' of ore is excavated from one of its faces. This wall is usually several miles long and hundreds of meters wide. Excavation usually begins from …
In terms of engineering support technology, studies mainly depend on supporting materials, supporting forms and supporting technologies, and the current …
Brittle failure, also known as rockburst, is a violent phenomenon that occurs during the excavation of hard rock in areas with high geostress, particularly at great depths. The induced hazards have …
In this paper we have discussed Fuzzy Logic technique and its application to optimize the mine support parametric data and thus to approximate setting load to be applied on rigid steel props to upkeep safety in underground mines. ... neuro-fuzzy prop at mine technique Sl. Nos. Parameters site (Ton) (Ton) 1 Twelve 9 9.02 2 nos. of 7 7.02 3 Input ...
2.1 Roadway support techniques in German coal mines Germany has some of the deepest coal mines in the world, and the leading strata control technology for deep road-ways (Shi et al. 2009, 2013 ...
Tunnels and underground excavations - Tunneling techniques: Tunnels are generally grouped in four broad categories, depending on the material through which they pass: soft ground, consisting of soil and very weak …
support engineering technique widely applied (by 56% of the mines surveyed). Unwedge is mainly applied once mining has started and structural data is available. In particular, it is used to calculate the weight of the largest possible wedge and to verify that the existing support design can cater for it. Unwedge is particularly
Data mining is a process used by companies to turn raw data into useful information. By using software to look for patterns in large batches of data, businesses can learn more about their ...
According to the coal roadway characteristics of strata behavior of No. 2 mining area, this paper advocates that with the adoption of cable truss system, powerful …
Ground support is widely implemented to mitigate dynamic rock failures in underground mines. This paper investigated the ground support requirements in burst-prone mines to mitigate the catastrophic dynamic rock failures of rock and/or coal bursts. First, the ground support principles and considerations in burst-prone conditions are …
Study of Soft Rock Roadway Support Technique. Soft rock prevalent in coal-bearing strata in China, a lot of soft rock is buried deep in the larger role of high stress by the formation, and maintenance of the roadway is very difficult to dig. Therefore, the soft rock tunnel in the control theory and practice of in-depth study on the maintenance ...
Classification of rock and coal is one preliminary problem for fully automated or intelligent mining. It assists for the automated rib stability analysis and enables the shearer to adjust the drums without human intervention. In this paper, the classification of rock from coal on rib images has been studied with machine learning techniques. A …
Ground Support for underground mines comprises five sections covering all elements of the design process: • Section 1 addresses ground support selection and design considerations. • Section 2 ...
Supported methods are those that require significant artificial support to maintain stability in the exploitation openings of the mine. We like to use pillars of the original rock mass as …
Many strata control methods have been developed to support the roadways under complex conditions in China and other countries. According to support …
In this study, geographic information system (GIS)-based methods and applications utilized for mine development were reviewed. Three types of GIS-based studies, namely studies on mine planning, operation, and environmental management, were examined to describe the role of GIS as a decision-making support tool in mine …
Predicting Blast-Induced Ground Vibration in Open-Pit Mines Using Vibration Sensors and Support Vector Regression-Based Optimization Algorithms. Hoang Nguyen, 1 Yosoon Choi, 2, * Xuan-Nam ... (AI) applications are considered useful, not only as robust techniques in the mining field but also in many other areas (e.g., civil engineering, fuel ...
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The gob-side roadway of 130205, a large-mining-height working face in the Yangchangwan coal mine, was investigated in terms of the mine pressure law and support technology for large mining heights ...
Data mining, also known as knowledge discovery in data (KDD), is the process of uncovering patterns and other valuable information from large data sets. Given the evolution of data warehousing technology and the growth of big data, adoption of data mining techniques has rapidly accelerated over the last couple of decades, assisting …
association rules (in data mining): Association rules are if/then statements that help uncover relationships between seemingly unrelated data in a relational database or other information repository. An example of an association rule would be "If a customer buys a dozen eggs, he is 80% likely to also purchase milk."
Digging deeper: Mining methods explained. Open-pit, underwater, and underground mining. These are the three main methods of mining we use to extract our products from the ground. In this Digging Deeper article, we take a look at these different methods and provide a glimpse into what each involves. Mining is at the heart of our business at ...
Here's a step-by-step guide to how a room and pillar mine is developed. 1. Exploration. First, a deposit must be identified and determined as suitable for this technique. Coal, iron, and uranium are among the …
Text mining, also known as text data mining, is the process of transforming unstructured text into a structured format to identify meaningful patterns and new insights. By applying advanced analytical techniques, such as Naïve Bayes, Support Vector Machines (SVM), and other deep learning algorithms, companies are able to explore and discover ...
1. Introduction. Shallow-buried Jurassic coalfields are widely found in western China, especially in Ordos region (Gu et al. Citation 2006; Ye Citation 2011).There are five to six workable coal seams in each of the most coal mines in this region (Chen Citation 2013).The interlayer spacing of coal seams varies from several meters to tens of meters and the …
In this study, geographic information system (GIS)-based methods and applications utilized for mine development were reviewed. Three types of GIS-based studies, namely studies on mine planning, operation, and environmental management, were examined to describe the role of GIS as a decision-making support tool in mine …
ABSTRACT This paper introduces the fracture mechanics approach—a unique way to predict the stability of a coal mine panel. The technique uses analytic equations to …
The steps followed in the Apriori Algorithm of data mining are: Join Step: This step generates (K+1) itemset from K-itemsets by joining each item with itself. Prune Step: This step scans the count of each item in the database. If the candidate item does not meet minimum support, then it is regarded as infrequent and thus it is removed.
Overview of Jiangzhuang CM. The Jiangzhuang CM is located in the middle of Tengnan Coalfield, Shandong Province, 12 km south of Weishan City. The mine is 3.5 km wide from east to west and 10 km long from south to north and covers an area of 35 km 2.Jiangzhuang CM lies between 34°53′24″ N and 34°58′18″ N latitude and 117°01′12″ E …
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. Surface Mining. Surface mining involves removal of plant life, soil and potentially bedrock to be able to access resource deposits. It is normally used for fairly shallow, non-precious ...
The application of data-based approaches such as machine learning to big data at mine sites is known to be advantageous (Karpatne et al., 2018). Truck haulage systems (THS) in limestone mines have been identified as a target for the application of machine learning techniques to big data for ore production management.
Mining is the process of extracting useful materials from the earth. Some examples of substances that are mined include coal, gold, or iron ore.Iron . ore is the material from which the metal iron is produced.. …
Ground control and management deal with techniques to solve geotechnical problems of instability in underground mining operations. The techniques include plan, design and method of operations to avoid workplace injuries and equipment damage due to the risk of rock failure. ... split sets, using back fill as regional support in mining …
West ia Abandoned Mine Land Reclamation / Controlled Grout Columns: A Point-Support Technique for Mine Subsidence Abatement Author: N. A. Robinson / P. R. Michael, A. S. Lees, T. M. Crandall, J. L. Craft Subject: 5th Annual Meeting of the American Society for Surface Mining and Reclamation, April 19-21, 1988, Pittsburgh, Pennsylvania
In rock support, such as that provided by steel or timber sets, external support is provided to the rock mass. Ground support techniques have not found wide application in surface mining and quarrying, partly because of the uncertainty of the ultimate pit geometry and partly because of concerns with corrosion.
