Caving Mining Method Classification and Characteristics

JY-AT1000L cutting slot patio drilling rig is developed by Hunan Jinyue Mine Technology Co., Ltd. to adapt to the mining technology of VCR segmented caving method, which can meet the …

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CN108915687A

High-dipping is segmented digging integration Sub-Level Caving coal-mining method, includes the following steps：（1）Select coal seam；（2）Coal seam is divided into several exploiting fields, is divided into several pieces in the segmentation of rectangle along seam inclination direction in an exploiting field；（3）First one piece of segmentation of exploiting field lowest part is ...

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Surface Deformation Calculation Method Based on …

by segmented caving mining. More importantly, these two methods essentially calculate the overall ground deformation as continuous deformation and are not suitable for calcu-lating the overall discontinuous deformation of the ground caused by segmented caving mining in …

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Cut Blasting Optimization Using 3D Laser Scanning and …

For the non-bottom pillar segmented caving method commonly used in metal mines, the excavation speed of full section tunnel blasting is crucial. This speed is primarily determined by the effectiveness of cut blasting. A well-designed cut blasting method facilitates rock fragmentation and ejection within the cut cavity, providing additional free ...

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A Physical Model for Demonstrating Segmental Caving without …

A segmented caving method and physical model technology, applied in the field of underground mining, can solve problems such as understanding abstraction and teaching demonstration …

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CN106522953A

The invention provides a dynamic segmented mining and caving technique for strike long-wall full-mechanized caving mining of a high-dipping thick coal seam. The technique comprises the steps that two roadways are excavated in the high-dipping thick coal seam to serve as a transportation roadway and an air return roadway correspondingly, a strike long-wall full-mechanized caving …

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Caving Method, Classification and Application of the

sublevel height and expanding ore caving areas, forming a variety of mining schemes. The stage caving method can be divided into forced block caving method, natural caving method, and induced caving method. Similar to the develop-ment of sublevel caving with sill pillar, the forced block caving method was introduced into China

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Structural Parameter Optimization for Large Spacing Sublevel Caving …

Non-pillar sublevel caving is beginning to use large structural parameters in China. Appropriate structural parameters can effectively control the loss and dilution of stope and improve ore ...

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(PDF) Optimization calculation of stope structure …

Mathews stability graphic method, based on the rock classification system, measures the stability of the ore roof area of a relatively simple calculation method and provides a theoretical basis ...

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CN102953732A

The invention discloses a room-and-pillar major-diameter longhole inverted-step-like segmented lateral caving subsequent filling mining method for a steeply-inclined medium-thick orebody and gently-inclined and inclined extremely-thick orebodies with steady surrounding rocks at upper and lower panels. The method is characterized in that: an orebody is divided into panels, then the …

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Cut Blasting Optimization Using 3D Laser Scanning and …

For the non-bottom pillar segmented caving method commonly used in metal mines, the excavation speed of full section tunnel blasting is crucial. This speed is primarily …

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Caving Mining Method Classification and …

Segmented rock drilling, ore caving and ore drawing are carried out in the stoping roadway. Sublevel caving method is mainly used in the mining of iron ore deposits, most of which are newly built mines. At each stage, the …

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Optimization of drawing sequence in longwall top coal …

This model takes into account predetermined cutting and caving ratios, as well as drawing intervals. To examine the caving process and roof particles, three different drawing sequences were examined: sequential …

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Study on the law of ore dilution and loss and control

The non-pillar sublevel caving method is widely used in metal mining production. The characteristics of this mining method include completing preparatory cutting, followed by drilling and ore ...

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Structural Parameter Optimization for Large Spacing Sublevel Caving …

Non-pillar sublevel caving is beginning to use large structural parameters in China. Appropriate structural parameters can effectively control the loss and dilution of stope and improve ore drawing efficiency. In this study, taking Chengchao Iron Mine as the engineering background, a theoretical calculation, a numerical simulation, and physical similarity experiments were …

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The Recent Progress China Has Made in Mining …

As the world's largest resource production and consumption country, China is rich in mineral resources, but its per capita occupancy is lower than the world average. In this context, mining enterprises need to choose …

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Life in the cave

These segmented worms (e.g. earthworm) are often abundant in caves, groundwaters and sediments living in soil. They ingest ('eat') mud and extract nutrients from it. Allolobophora chlorotica is responsible for worm casts in Otter Hole. Some are to be found deep in caves but all those found in caves also live in surface soils.

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Segmented Turning Patterns: Elevate Your Woodcraft!

First, arrange the segments in the desired pattern. Use a glue that dries quickly. Make sure each segment is aligned perfectly. Secure the segments with clamps.Wait for the glue to dry completely. Once dry, mount the glued segments onto the lathe.Ensure the segments are centered on the lathe. Tighten the lathe's chuck to hold the segments firmly. Start the lathe at …

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Study on the law of ore dilution and loss and control strategies …

To improve ore recovery ratio and the quality of medium-length hole blasting in non-pillar sublevel caving method, this study first investigated the effects of brow line failure on rock movement and ore recovery indexes based on rock blasting fragmentation mechanisms, the granular dynamics theory and ore drawing theory. Subsequently, control strategies to enhance blasting quality …

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Sublevel Caving Method Without Sill Pillar | SpringerLink

Advantages of sublevel caving method without sill pillar: the stope has a simple structure, which is beneficial for the operation of large mechanized trackless self-propelled equipment; no need to maintain pillars, high adaptability to changes of ore body, concentration and stoping of the orebodies of various grades and with horse stones, and high flexibility; the …

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A cutting method for sub-cave mining

A segmented caving method and cutting method technology, which is applied in the cutting field of segmented caving mining, can solve problems such as difficulty in excavation, gun smoke …

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(PDF) Optimization of drawing sequence in longwall top coal …

To examine the caving process and roof particles, three different drawing sequences were examined: sequential drawing, segmented sequential drawing, and …

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Study on Optimization of Stope Structure Parameters for Steeply

When the segmented caving method is used for mining, if the stope structure does not match the flow characteristics of the ore and rock mass, it will inevitably lead to greater ore loss and dilution, resulting in a serious waste of mineral resources [5,6,7,8]. From the perspective of safe mining, especially for the mining conditions along the ...

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CN106522953A

The invention provides a dynamic segmented mining and caving technique for strike long-wall full-mechanized caving mining of a high-dipping thick coal seam.

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Segmented Woodturning Using Jig

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Study on Optimization of Stope Structure Parameters for …

To solve the problem of large ore loss and dilution in the high-end wall sublevel caving method of Xilinhot fluorite mine, it is necessary to select proper stope structure parameters.

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Not Caving into Extinction – MBZ Conservation Fund Annual …

Not Caving into Extinction. Protecting the rarest spider in the world and the unique animals with which it shares its home. Batu Cave Trapdoor Spider ... with features such as a segmented abdomen. The species was first described by western explorers in 1923 but in the intervening years, the species occurrence has declined because of human ...

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Medium-depth hole V-shaped detonating method suitable for …

A technology of subsection caving method and detonation method, which is applied in blasting, earthwork drilling, underground mining, etc., can solve the problems of sequence differential blasting between rows, secondary blasting suspended roof, limited use and other problems, and achieves the suspended roof rate. Reduced, low block rate, reduced damage effects

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Mechanical behavior of a new segmented lining for underground …

LRCs are mainly used for storage of natural gas (Andersen, 2022, Stille et al., 1994, Tengborg et al., 2014).A portion of the high gas pressure is transferred to the surrounding rock, and the lining also serves to smooth the inner wall and seal the gas (Damasceno et al., 2023b, Kim et al., 2016, Rutqvist et al., 2012).The Korea Institute of Geoscience and Mineral …

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Surface Deformation Calculation Method Based on

deformations caused by segmented caving mining and have achieved good results in many cases, the irregular nature of metallic ore deposits means that the surface defor-

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