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The Mathews stability chart method and the UBC limit span method are used to evaluate the stability of the input mining parameters at the current evaluation …
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@article{Fan2024InvestigationOS, title={Investigation of surrounding rock stability during proximal coal seams mining process and feasibility of ground control technology}, author={Jinsong Fan and Qiang Yuan and Jie Chen and Yiwei Ren and Dingding Zhang and Hai Yao and Bo Hu and Yinghao Qu}, journal={Process Safety and …
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If used correctly, these instruments can provide important quantitative information regarding the mining-. induced behavior of the host rock, the performance of ground support systems, and the ...
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The sublevel stoping mining method is mainly used to mine the inclined to steeply inclined, thin to medium-thick ore bodies, requiring at least moderate stability of the ores and surrounding rocks. Its advantages lie in the simultaneous multi-section stoping and centralized operation, considerable flexibility in the implementation of trackless ...
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Ground stability analysis and control for the large-scale isolated stope mining. ... In the process of mining underground ore bodies, due to the unreasonable mining sequence, a number of isolated stopes appear [1], [2]. Since the isolated stope is surrounded by goafs, it is subjected to a large roof load, resulting in the stress …
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Ground stability analysis and control of large-scale isolated stopes by a combined support of reinforced concretes and expandable props. ... In the process of mining underground ore bodies, due to the unreasonable mining sequence, a number of isolated stopes appear [1], [2]. Since the isolated stope is surrounded by goafs, it is …
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Backfilling can improve stope stability in underground workings and then improve ground stability of the whole mine site. However, backfilling step scenarios vary from site to site. This paper …
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Ore dilution is a fundamental problem for the production process in underground mining operations. Especially in open stoping methods of underground mining, the continuous estimation, monitoring and treatment of instability issues is considered …
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The stability of mine developments is of utmost importance during the planned period of production or the life of a mine plan. Many Canadian underground mines use transverse stoping with delayed backfill to extract tabular ore deposits.These methods require access to the orebody through a number of sill drives and cross cuts which link …
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It has been determined that during the mining of ore bodies 4 and 6, protecting pillars between the quarry and the underground mine, crown pillars between the levels up to the level of +144 m, the ...
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The ore deposit of Tongkuangyu Copper Mine is dominated by bornite, the main orebodies are 4 # and 5 # with dip angles of 40°–60°. The average thickness of 4 # orebody is 95 m and the maximum thickness is 151 m. The average thickness of 5 # orebody is 97 m and the maximum thickness is 155 m. The properties of main ore …
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The maximum principal stress, artificial false roof stress, and displacement were analyzed to evaluate the level of ground pressure in different mining areas.
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Specifically, we adopt narrow-spacing mining in the eastern part of the slope to extract coal seams, and the waste dump is placed in the western part to control slope deformation and enhance slope stability. The mining scheme involves a bottom bench length of 100 m, with waste dump boundary maintaining a distance of 100 m from the mining area.
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The instability of slopes and ground subsidence caused by the conversion from open-pit to underground mining are important aspects of mining disaster research. This study focuses on the instability of slopes and ground subsidence during the conversion from open-pit to underground mining in the Beiyi mining area of the Shilu …
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Downward route backfill is the main mining method used in Shanjin gold mine, due to its crashed rock mass in the underground mining area. The stage height, sublevel height, and layer height are 40 ...
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With the mining activity going deeper, the ground stress increases, the mining technical conditions and environment deteriorate seriously, and the mining cost increases sharply. The premise of mining is to ensure the stability of rock mass during the mining activity, so it is necessary to design a reasonable stope structure parameter that …
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Sub Surface provide Ground Stability Assessment Reports to assess the risk of ground instability from Mining and Natural Cavities nationwide. We design a site specific Site Investigation with regards to the risk of ground instability and the expected ground conditions, to identify the presences of any voids, low strength or loose infilled material …
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Block caving mining method is one of the most viable and preferred mass underground mining methods for low grade orebody. However, in combined surface and underground mining, the breakthrough of an underground caving under an open pit may result in subsidence at the bottom of the pit. This can pose a serious threat for the …
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Development of deep underground mining projects is crucial for optimum extraction of mineral deposits. The main challenges at great depth are high rock stress …
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In specific large underground opening, it is stated that the quality of rocks is directly related to stability of pillars. That means the rock having high quality shows better stable environment ...
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Karama et al. [139] argued that gravitational load is the most important load affecting the stability of the mine and, notably, the shear strength of the ground, which confers major resistance to ...
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After substituting the related mechanical parameters listed in Table 1 in Eq. (10), the relation curve between the required strength of backfilling body and the exposed height is obtained and shown in Fig. 3, where the length of the ore room is 50 m, and the width is 25 m.It can be seen from Fig. 3 that the required strength of backfilling body …
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tors, most ore bodies that adopt the open-pit to under-ground mining mode are those with a large dip angle (Sokolov et al. 2013; MacNeil and Dimitrakopoulos 2017). From Eq. (1), it is evident that, the rock move-ment range is almost completely concentrated in the hanging wall, when the dip angle of the ore body tends to be horizontal.
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Probabilistic assessment of slope stability at ore mining with steep layers in deep open pits. December 2022. DOI: 10.33271/mining16.04.011. Authors: Olena Sdvyzhkova. Dnipro University of ...
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A reasonable and stable stope structure is the premise of realizing safe mining of underground metal ore.
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How to quantitatively characterise the impact of underground coal mining on the stability and slippage of loess slopes is a key problem in the evaluation of mining damage under loess slopes, but it is more difficult to study this problem under the impact of the particular mechanical properties and topographical features of loess slopes. In order …
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designed stope (i.e., mining lines) and can be optimized by selecting an appropriate mining method and stope design (Henning 2007). The amount of planned dilution mainly depends on the mining method and the orebody geometry. It is primarily considered when conducting feasibility studies to estimate the ore reserve and mining operating costs.
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Ore dilution (contamination of ore by waste rock) is a major concern when mining steeply dipping narrow-vein deposits. Dilution leads to the mixing of ore with barren waste or minerals below the cut-off grade during the mining process (Jang et al. 2015; Clark 1998; Wright 1983) which lowers the mill recovery (i.e., from lower feed ore grade) …
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Vasichev [9] employed a combination of filling mining method and caving method for mining gently inclined thick ore bodies, ensuring the stability of rock strata. Li et al. [10] found that ...
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Ground stability, subsidence, mining and environmental reports all include a ground stability element. All four main providers of environmental searches provide a ground stability assessment within an environmental report or bundled with another type of search, such as mining. They also offer more specialist searches that may be required if a ...
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PE series jaw crusher is usually used as primary crusher in quarry production lines, mineral ore crushing plants and powder making plants.
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