Ground pressure control example of sublevel caving mining method …
Ground pressure control example of sublevel caving mining method without bottom pillar. 17:07:16. ... the upper part of the dip angle (780m or more) is 45 to 85°, and the lower part (below 780m) is 20 to 35°. The ore body is thick in the middle, thinner in the upper and lower, and the thickness is 5 to 150 m, and the ore is ...
Structural Parameter Optimization for Large Spacing …
Abstract: Non-pillar sublevel caving is beginning to use large structural parameters in China. Ap-propriate structural parameters can effectively control the loss and dilution of stope and …
Sublevel Caving Method with Sill Pillar
In sublevel caving method with sill pillar, the stope bottom structure is also called ... and gently inclined thick ore body. It has high flexibility, large application scope, and high ... suitable for the equipment manufactured and sup-plied in China. In comparison with sublevel cav-ing method without sill pillar, sublevel caving method with ...
CN103089266A
The invention relates to a drift-pillar-free sublevel barnyard caving mining method of an open pit transferred underground transitional period. The drift-pillar-free sublevel caving mining method comprises the following steps of: carrying out sublevel recovering; and finishing rock drilling, blasting and ore removing in a feeding path.
Pillar pre-isolation sublevel stick-filling mining method and ore body …
A technology of strip filling and mining method, which is applied in the field of pillar pre-isolation and segmented strip filling mining method, which can solve the problems of high cost of filling mining method, impact on sustainable development, and ground surface does not allow subsidence, etc., so as to avoid a large amount of resources Loss, reduction of filling costs, …
CN108825238A
The invention relates to a method for converting a sill pillar-free sublevel caving mining method into a sublevel open stope mining method, which realizes the successful conversion of ore body mining from the caving method into the sublevel open stope method, the layering height is 10-15m, a covering layer is covered on the caving method and is isolated from the lower open …
CN111749693A
The invention discloses a method for constructing and blocking a medium-length hole in a large fault section by a sill pillar-free sublevel caving method, which is characterized in that the construction of reserving a medium-length hole is carried out when the medium-length hole is blasted to the large fault section, according to the fault occurrence state, the aperture of the …
Non-pillar sublevel mining cemented filling mining method
The invention discloses a non-pillar sublevel mining cemented filling mining method. The method is characterized in that sublevels are used as stoping units; stoping drifts are arranged in a staggered way in upper and lower sublevels; rhombic components are stoped in a sublevel mining way; the paces are the basic stoping units; deep hole breakdown is performed in …
Sublevel Caving
SLC soon gained the reputation of being a high dilution, low recovery and development intensive method. This led to SLC falling into disfavour generally, other than as a pillar reclamation …
CN108590652B
The invention discloses a kind of sublevel caving method without sill pillar that a nugget is divided along orebody trend, including dividing nugget along orebody trend, nugget is divided into stage and segmentation, road connecting taxiway and route are tunneled in nugget is respectively segmented, developing and system include return aircourse, exploiting field return air raise, …
CN106837335B
A kind of truck collaboration ore removal sill pillars sublevel caving method includes the following steps: that the stage, interior divide along orebody strike was segmented by the inclination of lower wall country rock moderately stable or more-inclined thick ore body or the arbitrary angle extremely thick ore body division stage；Ore body lower wall arranges the …
CN102419139B
The invention relates to a bottom-post-free sublevel caving method adopting a reinforced concrete structure artificial false roof, which comprises the following steps that: sublevel extraction is carried out under a coverage rock layer, an upper sublevel extraction roadway and a lower sublevel extraction roadway are in rhombic staggered arrangement, and the rock …
Caving Method, Classification and Application of the
The induced caving method, proposed by Chinese scholars, is a new mining method that organically combines the natural caving method with the non-pillar sublevel caving method. It is characterized by continuous excavation of induction to induce the natural caving of upper ore-rock, which will be subsequently released in one to two sublevels of ...
GEOE313 FINAL Flashcards
Study with Quizlet and memorize flashcards containing terms like Underground mining methods, Mining method selection, longwall mining and more.
Caving Underground Mining Methods (longwall, Sublevel caving…
2. Outline of Topic 7: Longwall Longwall in coal Longwall in Hard Rock Sublevel Caving Characteristics of the ore body and mining method Development Production Equipments Used Block Caving Introduction Historical evolution of the method Condition deposit Principles of the method Methodology of block caving Basic issues of geomechanical to the black caving …
Mine 201 Mining Methods Flashcards
Study with Quizlet and memorize flashcards containing terms like What are the 3 basic classes of underground mining?, What type of ore body would use the Room and Pillar method?, What type of ore body would use the Longwall stoping method? and more.
Behaviors and Overlying Strata Failure Law for Underground …
Based on the existing underground mining method and the actual situation of the Jinning Phosphate Mine, an improved pillarless sublevel caving method is proposed. It …
Truck collaborated ore removal type sublevel caving method with sill pillar
A segmented caving method and truck technology, which is applied in the field of segmented caving method with bottom pillars in the cooperative mining of trucks, to achieve the effects of simplifying the bottom structure, improving the degree of mechanization, and reducing the operation links of ore transfer
Temporary Roof Pillar Cyclic Induced Collapse: Beam
This study explores the principles of beam mechanics in the context of the combined mining method of roof pillar induction caving and non-pillar sublevel caving. Its objective is to determine optimal structural parameters for temporary pillars and induced caving step distance, thereby offering vital mechanical guidance for the implementation of this new …
MINING METHODS FROM DONNA MAY Flashcards
- ore strength: weak to moderate or fairly strong, preferably friable, structured, jointed rock, not blocky, should cave freely under weights - rock strength: weak to moderate similar to ore characteristics - deposit shape: massive or thick - deposit size: very large areal extent, thick ness 30m - ore grade: low ideal for disseminated ore deposits - ore conformity: homogenous - …
CN110469330A
A kind of sublevel open stope method the invention discloses pillar without bottom structure, this method includes dividing nugget along orebody trend, nugget is divided into stage and segmentation, thick rock cover is formed on nugget top before exploitation, then to fanhole(s) on constructing in sublevel drilling tunnel, explosion is carried out using msdelayed light …
Improvement of sublevel caving without sill pillar
After the stope structure parameters, hole arrangement parameters, blasthole layout form, initiating mode and ore drawing mode of sublevel caving without sill pillar in Shenbu Copper …
CN103089266B
The invention relates to a drift-pillar-free sublevel barnyard caving mining method of an open pit transferred underground transitional period. The drift-pillar-free sublevel caving mining method comprises the following steps of: carrying out sublevel recovering; and finishing rock drilling, blasting and ore removing in a feeding path.
CN1693662A
This invention discloses a modified sublevel caving method without bottom column, it includes substoping, drilling in route, blasting and ore output. Its feature is that ore body is defined as induction inbreak area, normal winning area and bottom recovery area from top to bottom and working in turns. The goal of induction inbreak area blasting coal winning is to collapse the …
Improved sublevel caving method without bottom column
A segmented caving method without pillars, which is applied in ground mining, earth drilling, underground mining, etc., can solve the problems of increasing mine construction investment intensity, large ore dilution, and low mining intensity, so as to eliminate blasting The effect of partition wall accident, increasing the amount of ore mined, and improving the ore recovery rate
CN108590652A
The invention discloses a kind of sublevel caving method without sill pillar dividing a nugget along orebody trend, including dividing nugget along orebody trend, nugget is divided into stage and segmentation, road connecting taxiway and route are tunneled in nugget is respectively segmented, developing and system include return aircourse, exploiting field return air raise, …
CN115263311A
A combined mining method of suspended roof column induced caving and bottom column sublevel caving of vertical deep hole ore breaking comprises the following steps: (1) Dividing the steeply inclined ore body into stages, sections, a suspended top column and a bottom column; (2) The stage haulage roadway, the rock drilling roadway and the bottom pillars are …
CN101338674A
The present invention relates to a non-pillar sublevel caving method. The non-pillar sublevel caving method which loads and transports ores directly is characterized by comprising the steps as follows: two or more dipheads are tunneled downwards at the position of an orebody near a heading side along the orebody tendency and are used as main haulageways; segmented …
Structural Parameter Optimization for Large Spacing …
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 …
GEOE313 MIDTERM 2 Flashcards
Study with Quizlet and memorize flashcards containing terms like Underground mining methods, Mining method selection, longwall mining and more.