Method for preparation of mineral resources deposits to reversed extraction order

IPC classes for russian patent Method for preparation of mineral resources deposits to reversed extraction order (RU 2247242):

E21C41/16 - Methods of underground mining (winning machines therefor E21C0025000000-E21C0039000000); Layouts therefor

Another patents in same IPC classes:

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Underground extraction method / 2246617
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Method for preparation of mineral resources deposits to reversed extraction order / 2247242
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Method for extraction of mineral resources deposits / 2249696
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Method for extracting thin and extremely thin steep-falling and slanted deposits / 2255222
Method includes separation of a level on hexahedral sections of upwardly elongated shape and is prepared by driving of field backup drift. From the drift shafts are driven below each section, from which along mineral resource ascending shafts are drilled, meant for drilling from them by horizontal or slanting wells and extracting sections resources. Outlet of extracted rock mass is performed through ends of shafts. After outlet of rock mass from all sections ceiling beam is brought down and let out also through ends of shafts.

Method for mineral preparation along with releasing thereof from under-roof layer / 2269002
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Underground mining method / 2269003
Method involves cutting mineral by hydrocutting machines and headers from face massif in rectangular blocks; putting on metal cases on the blocks to facilitate loading-and-unloading operations and transportation; loading the cut blocks on hauling truck along side previously opened from breakage face side, wherein the truck position is fixed by spacing apart hydraulic post permanently connected to the hauling truck; moving loaded hauling trucks inside breakage face by hauling tracks along channel, V-shaped guiders or guiding rails with the use of haulage cargo winches arranged in berms near conveying tunnels or with the use of independent drives, wherein the conveyance is carried out to conveying and venting tunnels abutting the breakage face; loading mineral blocks from hauling trucks onto wheeled transport platforms without block turning for following transportation. Distance between rail tracks is equal to rail track width to transport blocks on paired wheeled platforms in which locomotive moves along medium track. Working area face is strengthened by individual hydraulic posts and metal hydraulic jacks and metal roof bars or by mechanized face support. The face support has fastening sections including above hydraulic jacks and roof bars, as well as wheel guiding means sections and hydraulic movers with control panel arranged on each fastening section pair. The roof is controlled by partial filling the excavated space with mineral blocks. Distance between neighboring mineral units arranged on one paired wheeled platform and on adjacent platforms may be identical and equal to distance between guiders in breakage heading. Mineral blocks are cut in several rows, wherein depth of slot at seam ground and roof is two times as thickness of mineral blocks to be cut.

FIELD: mining industry.

SUBSTANCE: method includes cutting well field portions by driving bed and field mines. At mine fields to be prepared with weak rock stability driving of several field preparatory mines is performed at portion of field with width determined from formula. Bed preparation mines on same portion are driven alter, with displacement of cleaning operations from these may be driven in portions, at which their stability is provided for technological time period with inter-drift blocks of given rigidity.

EFFECT: higher safety.

2 cl, 1 dwg

The invention relates to the mining industry and is intended to implement the method of preparation of mineral reserves in the panels or blocks to reverse the order of testing.

There is a method of preparation of potash strata during the mining of panels (see Vggallery and other Technology of underground mining of potash ores. - M., “Nedra”.- 1977.- pp.33-37). When preparing mine fields and individual panels are the main and panel transport and formation drifts. Transportation roadway cut into the underlying empty rocks the entire length of a mine field and each panel. Above the main transport drifts of the same length in the seam are the main ventilation drifts, and on a panel transport drifts - excavation. Excavation and transport drifts connect hasenkam. To protect the main panel and the transport and formation workings leave hard pillars of constant width. As auxiliary supports are often used bolting. In reverse order of testing of the mine fields or only panels sewage treatment works are from the boundaries of a mine field in the direction of the trunks or main workings.

This method has the following disadvantages: large lump sum and unit capital costs drilling field and maintain in safe condition of formation of the workings, will complement the global loss of minerals in hard security pillars. The drifts on the reservoir and empty the breed (the main trunks and the panel at the beginning of the panel) must be maintained in safe condition the entire period of testing of the mine fields or panels separately, which causes the need to produce an unstable host rocks during formation drifts, and sometimes they re the sinking. At the same time, reservoir panel excavation drifts are only required for maintenance of the treatment works, so they can be cut as needed when doing cleaning work. This can reduce the life of the reservoir openings, and thus reduce material costs for their maintenance in a safe condition. In reverse order testing treatment works start from the borders, so the lifetime of the reservoir openings on the border of the mine fields minimum and during maintenance of the treatment works, secure the stability is ensured. In this regard, the need for field workings with good resistance near the borders of the mine fields, the purpose of which is to increase safety and transportation of minerals, no.

Closest to the proposed technical solution is the way to cut layers of minerals, which make the driving of reservoir development workings above the field on godavitarne workings, formation between the said reservoir preparation working hard pillars and maintenance of treatment works reverse order, with the sinking of reservoir development workings and the formation of rigid pillars between them carry out first on stable areas of the reservoir, and the driving field development workings exercise on an unstable areas of the reservoir and treatment works on stable areas are partially hollow rigid pillars, while the driving of the formation of development workings in the unstable areas of the reservoir is carried out after the approach to these areas of wastewater treatment works and is formed between the reservoir preparation working on unstable parts of the layer of pliable pillars (A.S. 1361328, USSR, MCI E 21 41/04, Declared 06.01.86, publ. in BI No. 47, 23.12.1987 year).

This method does not allow to determine in advance the extent of the sites periodically cut reservoir excavations in unstable ground, and partial testing of the security pillar at high mountain pressure is not safe.

The technical result of the invention is to improve the efficiency and safety of mining operations by reducing costs of drilling development workings and their safe keeping in the presence of sustainable sites and ustoichivyh time selection of breeds, different strength properties.

This technical result is achieved in that in the method of preparation of mineral reserves to reverse the order of testing, including cutting panels (blocks) the sinking of the reservoir and field development workings, prepared to working areas of the mine fields with weak stability breeds, pre-exercise sinking only field development workings at the site of a mine field length determined by the formula

L_floor=ι_padgug-t_ustat· V_OCR,

where L_floor- the length field development workings, m;

ι_padgug- the length of the breakable section of a mine field (panel unit), m;

t_ycm.cocmthe time steady state reservoir development workings, year;

V_OCR- speed podvigina front of wastewater treatment works, m/year,

and formation of preparatory development on the same lot as the pass later on, as podvigina front of wastewater treatment works, with formation of preparatory development on the site location field development workings are as podvigina front cleaning work areas, which provide resistance to technological period of time when leaving midorikawa pillar is in with a given stiffness.

The essence of the method is illustrated in the drawing, which shows a diagram of the site preparation of a mine field.

The method is as follows.

When mining stocks of mineral deposits pre make the analysis of the geological conditions in which you plan to operate the output, then provide calculation of time in a safe condition in their particular circumstances. Formation of preparatory development lead to unstable areas only when you approach the front of the sewage treatment works and long, ensuring their safe operation at the desired time time.

To prepare the panels or blocks to reverse the order of testing the main (major) drifts transport and ventilation are only sustainable species, panel (block) preparatory cut production in stable and unstable ground, the length of which is determined by the necessary technological time safe operation commensurate with the speed of the front cleaning work, leaving midorikawa pillars with a given stiffness. Formation of preparatory development on unstable areas are periodically when you approach the front of the treatment works, length, ensuring their safe on the breadboard is th life of the operation.

From the main mines (excavations of the main directions) 1, 2 are the field of transport and conveyor drifts 3. The length of the section of a mine field on which these are working, determined by the formula:

L_floor=ι_padgug-t_ustat· V_OCR,

where L_floor- the length field development workings, m;

ι_padgug- the length of the breakable section of a mine field (panel unit), m;

t_ycm.cocmthe time steady state reservoir development workings, year;

V_OCR- speed podvigina front of wastewater treatment works, m/year.

Field transport and conveyor drifts held to the panel area (block), which provided industrial safety operation of the reservoir openings. Carry out the driving of the transport slope 4 to prepare the formation of the mineral, and then only reservoir of preparatory development to the boundaries of a prepared plot 6, 7. The ventilation passage 5 are sustainable rocks. Formation of preparatory development 10 on unstable land prepared layer are as podvigina front of wastewater treatment works 9 to a value satisfying the conditions of technology and stability of tunnels. Between the formation of the preparatory workings for their protection in the safe is the first state to leave the pillars 8 with a predetermined rigidity, determined by the length of workings and operations. Formation of preparatory development periodically cut sections 11, the length of which is determined by the time of their operation and the degree of resistance of the rocks.

The use of the proposed solution improves the efficiency and safety of mining operations due to sinking and safe maintenance of development workings in the presence of stable and unstable areas in time selection of breeds, different strength properties.

1. The method of preparation of mineral reserves to reverse the order of testing, including the cutting of panels or blocks the penetration of the reservoir and field development workings, characterized in that to prepare for mining sites of mine fields with weak stability breeds previously exercised by the driving of only the field of development workings at the site of a mine field length determined by the formula

L_floor=l_padgug-t_ustat·V_OCR,

where L_floor- the length field development workings, m;

l_padgug- the length of the breakable section of a mine field (panel unit), m;

t_ustatthe time steady state plastbearbetning workings;

year;

V_OCR- speed podvigina front of wastewater treatment works, m/year;

and formation of preparatory development on the same lot as the pass later on, as podvigina front of wastewater treatment works.

2. The method according to claim 1 characterized in that the formation of preparatory development on the site location field development workings are as podvigina front cleaning work areas, which provide resistance to technological period of time when leaving midorikawa pillars with a given stiffness.