Open development method of mineral deposits

FIELD: mining.

SUBSTANCE: method involves driving of permanent and working trenches, installation of downhole and main transport pipelines, extraction of a mineral deposit with wedge-shaped producing blocks. Driving of a working trench is performed by means of a parallel cut throughout the length of an open-pit field, and direction of a mine work front line is offset in a circumferential direction, the centre of which is a stationary rotary station of transport pipelines with radius R equal to maximum width of excavation cut to observe parallelism of the axis of transport pipelines to the mine work front line. The formed angle αi between radius R and the line of the main transport pipelines is determined from a mathematical expression.

EFFECT: improving efficiency of a fan development system.

3 dwg

 

The invention relates to the mining industry and can be used to develop powerful mineral deposits sloping and flat bedding using the techniques of continuous operation in an open way.

There is a method of open pit mining of mineral deposits, for the development of difficult structural fields with steep or sloping fall layers of different strength. Goal - improving the efficiency of the averaging of the rocks in the mine due to the possibility of quality control when blasting blasting rock bottom. To do this, hold the split trench and Orient it along the contact of rocks with pin inside the contour of the trench, which work out wedge-shaped benches. The width of zagadki set smaller than the width of a cutting trench. The top of the wedge is oriented in an array of rocks and placed on the contact rocks or the projection of the contact on the horizontal plane. The angle of the vertex of the wedge take around 80-90 degrees. Square Zachodni drilling of wells series, parallel, forming a wedge-zagadki. The wells are then charged and produce blasting rows of wells alternately from each side, forming a wedge-shaped section, and start blasting with hard rock. At the moment of explosion occurs layer-by-layer overlaying rocks one strength of the breed have the strength. When excavation of blasted rock additionally, the operation of mixing different breeds strength. [Patent SU # 1652553 A1 from 23.11.1988, publ. 30.05.1991, IPC E21C 41/00].

This method of development is characterized by low efficiency associated with complex organization in working one part of the career fields with the use of a longitudinal system, and the other fan and periodic dredging "wedges" at the beginning of each zagadki.

The closest in technical essence and the achieved result is a method of open pit mining of mineral deposits horizontal and sloping bedding powerful fields when applying the technique of continuous operation. This method involves the development of overburden, excavation of minerals and internal reserves, the development of overburden produce wedge-shaped benches with full notch wedge under the condition of parallelism of the lines of the lower inner edge of the blade from the mining zone, centerline course of the excavator during the mining of lower production pedostop ledge, the centerline of the stroke of the loader, the lower and upper edge of the lower mining ledge subsequent zagadki, axial lines conveyers for transporting mineral mining the lower and upper production podustov, the axial line x is Yes excavator when developing top mining pedostop ledge, the lower and upper edge of the upper mining ledge subsequent zagadki, the centerline of the turn overburden excavator, the lower and upper edge Stripping ledge subsequent zagadki. [EN No. 2394157 C1, E21C 41/26 from 26.05.2009, publ. 10.07.2010].

This method of development is characterized by low efficiency, excavation and loading complex in the wedge section.

The present invention is expressed in increasing the efficiency of the fan system development.

This object is achieved in that in the method of open pit mining of mineral deposits, with fan podviganiya front of mining operations, including the sinking of capital and cutting trench, installation of downhole and backbone communications, excavation of minerals wedge operational units, according to the invention, the driving of the cutting trench shall be implemented by parallel Zachodni the entire length of the career field and the direction of the line of the excavation front slip on a circle whose center is stationary turning point transport communications with radius R equal to the maximum width of excavation zagadki to maintain the parallelism of the axis of the transport lines to the front line of mining operations, while the resulting angle αibetween the radius R and the line of the backbone to which the nications determined from the conditions:

αi=180+(n·αf),

where αf- the angle of rotation of the front of mining operations specified depending on excavation equipment, deg;

n is the number of wedge-shaped operating unit.

Parallel to the axis of transport communications to the front lines of mining operations to ensure efficient extraction of mineral reserves.

Stationary turning point provides a constant distance transportation of minerals and allows beneficial to plan the location of stationary industrial facilities. The penetration of a cutting trench through parallel Zachodni the entire length of the career field provides training field for excavation at fan system design.

This method is illustrated in Fig.1, 2, 3,

where: 1 - capital trench; 2 - split the trench; 3 - main transport communications; 4 - hole transport communications; 5 - stationary turning point; 6 - rotary complex; 7 - wedge-shaped operating unit; 8 - the front line of mining operations; 9 - the direction of the line of the excavation front.

The method consists in the following. Using well-known ways and means passed 1 capital and built a split 2 of the trench, where the trunk 3 and 4 downhole transport communications with the stationary turning parts, all specifications is essential 5. Split the trench 2 is removed along the entire length of career fields rotary complex 6 through parallel zagadki, the width of which is equal to the maximum width of excavation zagadki - Bmax, corresponding to the radius R. Further excavated areas have a tapered - wedge operational blocks 7. For effective extraction of minerals at fan system design necessary condition is the principle of parallelism of the axis of the transport lines to the front line of mining operations. To comply with the principle of parallelism, you must adjust the front line of mining operations on 8 hole transport communications 4 proceeding from the condition that the direction of line 9 is displaced along the circumference whose center is stationary turning point transport communications 5 with radius equal to the maximum width of excavation zagadki.

This technological method provides an efficient mining of minerals at fan system design through excavation-pogruzochno complex continuous action.

The method of open pit mining of mineral deposits, with fan podviganiya front of mining operations, including the sinking of capital and cutting trench, installation of downhole and backbone of the communication the Nations, the excavation of minerals wedge operational units, characterized in that the driving of the cutting trench shall be implemented by parallel Zachodni the entire length of the career field and the direction of the line of the excavation front slip on a circle whose center is stationary turning point transport communications with radius R equal to the maximum width of excavation zagadki to maintain the parallelism of the axis of the transport lines to the front line of mining operations, with the resulting angle αibetween the radius R and the line of the backbone of the communications is determined from the conditions:
αi=180+(n·αf),
where αf- the angle of rotation of the excavation front, specified depending on excavation equipment, deg;
n is the number of wedge-shaped operating unit.



 

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EFFECT: higher efficiency.

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