Method for underground thick ore body mining

FIELD: mining, particularly underground thick ore body mining with chamber excavation system with goaf filling at large depths in the case of elevated rock pressure.

SUBSTANCE: method involves cutting unloading slot (slot raise) along ore body strike and before chamber stock excavation initiation in massifs of chambers of the first, the second and the third stages; filling the unloading slot with shrinkage ore; connecting unloading slot ends with cleavage cracks in different stages, wherein the cleavage cracks are formed by drilling wells of 100-112 mm diameters spaced apart 1-1,2 m apart along stage boundaries between sublevels so that each second well is blasted. As lying wall and hanging wall converge ore massifs of the first, the second and the third stages are shifted and slide one relatively another along with partial pillar breakage in unloading slots. To block filling material penetration through slot raise excavations passing through pillars, concrete bridges are erected in the slots. After than chambers of the first stage are cut and filled. After drilled cross-drift cutting the second and the third stage massifs are broken on previously driven slot raises.

EFFECT: increased mining safety and filler, improved stability of the first, the second and the third stage ore massifs, as well as contact massifs of lying and hanging walls.

1 dwg

 

The invention relates to the mining industry and can be used in underground mining of massive ore mineral deposits chamber development system with the mined-out space at great depths under conditions of high rock pressure.

There is a method of extraction polegada and inclined mineral deposits, including drilling and ventilation drifts, drilling and blasting wells, separation of the mineral from the roof of the chamber blowing horizontal rows of holes. In this way the breaking of layers of mineral produce fans of wells that are drilled at the plane perpendicular to the plane of the face, as well, limiting the amount thump of hands layer in each fan, drilling at an angle 50-90° towards neotricula ore array, and the mined-out space hardening mixtures [1]. Extraction of minerals is accompanied by exposure to high compressive stresses in the ore arrays on low contact array, crushing it, which leads to its partial destruction and increase the contamination of ore.

The technical nature of the invention is the closest way to create a supporting pillar, including compensatory production in the host rocks of the soil C is Lika, the formation of a zone of compliance pillar collapse, loading and blasting on compensatory production of a layer of rocks width equal to the width of the base of the pillar, and a height equal to the height of compensatory production, and the blasting explosive charge in the specified layer and peripheral sections of the main pillar is made simultaneously [2]. The disadvantages of this method include the fact that the ore arrays within working not unloaded from high compressive stresses, and protect only the pillar, ore reserves which constitute 20-40% of the stock unit.

To prevent these negative phenomena in the above mentioned methods when developing unit are proposed preliminary discharge arrays 1, 2 and 3 queues directly before working chamber stocks by advanced drilling handling (cutting) slit 1 along the strike of the entire ore body, shown in the drawing and filled tamakaimoana ore.

Given that the ore body plan have a curved shape and different strength capacity, the discharge slot 1 it is advisable to perform a step, connecting the ends of the slots in the various queues of the fractures.

Preparatory-threaded unit are passing drill vectors 5, workings of the cutting slits 1 and the cutting itself 4. Then do crack the interruption to their education on the limits of the queues through 1-1,2 m drilling the number of vertical wells 2 on the entire floor height diameter 100-112 mm, charge through one and blow up. Then move to the drilling and blasting discharge slots 1, cutting itself which plays the role of the compensation output.

As education of the discharge gap 1 as a result of convergence lying and hanging sides of ore arrays of cameras 1-x, 2-x 3-x queue will move to slip relative to each other, partially destroying zalicki 3 and condensing tamakaimoana ore in the discharge slits. In the densified ore and vertical zalicki 3, located on the edges 2 and 3 queues, albeit compromised, will practically prevent backfill material from cameras 1-x queues in the discharge gap. To block the penetration of bookmarks via passing through zalicki 3 generation unloading slots 1 in them erect concrete lintels. After that, start practicing, and then bookmark cameras 1-x queue.

Blasting chamber of the inventories is carried at the discharge gap 1, which in this case plays the role of cutting slits, facilitating the breaking of ore on two Nudes plane.

Further work on arrays of cameras 2 and 3 queues already held cutting slit 1.

With the proposed methods of doing cleaning work voltage in ore arrays 1, 2 and 3 queues will be relatively small, which will ensure their stability ol the outcrop. The same applies to the contact arrays lying and hanging sides.

BIBLIOGRAPHIC details of SOURCES of INFORMATION

1. The METHOD of EXCAVATION POLEGADA AND INCLINED MINERAL DEPOSITS inventor's certificate SU # 1460275, CL IS 41/06, 23.02.89 (similar).

2. A method of CREATING a SUPPORTING PILLAR inventor's certificate SU # 1459321, CL IS 41/06, 23.12.90 (prototype).

How to develop a powerful ore bodies mined-out space, including the sinking of mines, drilling and blasting arrays in cells fans wells in the cutting gap, characterized in that prior to the excavation chamber reserves the ore body is cut along the entire height of the floor of the vertical discharge gaps that are in the adjacent chambers slip plane and the ends of which connect the planes of separation performed by drilling and blasting in camouflet rows of wells, connecting the ends of the discharge slots filled tamakaimoana ore subsequently performing the function of cutting slits, leave vertical tape pillars with dimensions that allow their partial destruction as education unloading slots and the convergence of their walls, after which develop in the tape the whole block of concrete bridges.



 

Same patents:

FIELD: mining, particularly underground deposit mining.

SUBSTANCE: method involves separating mining level into chambers arranged in staggered order, wherein chambers of each lower level are shifted with respect to ones of upper level for half of chamber width; preparing each mining level and sublevel by lateral drift excavation; forming inclines and cross-drifts to hanging wall of deposit; developing rises from cross-drifts of mining level, which are converted into slot raises; cutting chamber stock to open face. Mining levels are separated into chambers without safety pillar leaving. The chambers are shaped as hexahedrons. Ceilings are fully removed from mining level cross-drifts and are filled with filler. To cut chamber stocks ore level and sublevel drifts are created at lying walls. Inclines are cut from ore sublevel drift so that inclines extend between chambers. Fan-like wells are drilled from ore drifts and mining level stocks are blasted. Ore is drawn from each chamber to slot raise through incline ends in mining level and sublevel.

EFFECT: increased ore deposit thickness, decreased stock preparation and cutting time, as well as reduced mining costs.

2 dwg

FIELD: mining, particularly methods of underground mining.

SUBSTANCE: method for ore body having low and medium thickness development by mine sections involves preparing, cutting and drilling wells from drilling rooms; charging wells with explosive and blasting thereof; drawing ore from blocks and supporting goof. As mine section stock is excavated breakage heading line is advanced in several sections along ore body propagation line. Drilling rooms extend along maximal ore body shape variation line. Ore in section is cut in several layers transversal to longitudinal drilling room axis. Said layers have constant dimensions measured in direction of maximal ore body shape variation line. Layer dimensions in direction of maximal ore body shape variation line are divisible by line of least resistance. Layers have variable dimensions in direction of minimal ore body shape variation line and are determined to provide completeness of curvilinear ore body area cutting with linear stopping zone section.

EFFECT: increased labor productivity and mechanization degree due to improved self-moving or monorail drilling rig usage.

5 cl, 22 dwg

FIELD: mining, particularly underground thick deposit development by room-and-pillar method, namely for uprise forming.

SUBSTANCE: method involves making uprise; forming horizontal entry in ore pass; isolating ore pass from goaf and filling goaf with dry filler. Uprise is made from ready entry of layer to be cut for 2-3 m height. Ore pass isolation is performed by removable metal form installation. After that entry space up to form is filled with rubble concrete.

EFFECT: decreased costs for ore production due to decreased ore making costs and lining thereof during goaf filling along with increased strength of ore pass entry.

2 cl, 6 dwg

FIELD: mining, particularly underground flat ore body mining.

SUBSTANCE: method involves cutting development-and-face entries; forming lava undercutting and ore ledge; excavating ore in lava undercutting and ore ledge in several layers; unloading cut ore on lava undercutting surface and transporting thereof. Lava undercutting is provided with powered support sections. Ore is cut from lava undercutting in several layers having widths divisible by powered support section advance increment. Ore ledge is cut in several layers. Each layer has width not exceeding that of technically specified loader bucket entry in goaf. Cut ore is distributed and conveyed along lava undercutting length under power support section protection. Forced seating of overlaying rock from drilling-and-seating entries drilled along upper ore bed contact is carried out with pitch divisible by ore ledge layer width to be cut.

EFFECT: decreased cut ore losses and dilution with overlaying rock, increased safety and labor productivity.

4 cl, 1 ex

FIELD: mining, particularly to develop steep ore deposits in upward order.

SUBSTANCE: method involves sinking hauling entry of overlaying level, field incline, drive connecting hauling entry with chamber, sub level field entry, drive communicated with drill drift and ore drill drift; drilling well ring to upper overlaying chamber undermining mark; cutting ore; discharging and unloading cut ore; filling chamber goaf with pourable rock filler, wherein the rock filler is supplied directly from drives in chamber from hauling entry of overlaying level and rock filler is distributed over chamber area and compacted with the use of earth-moving machinery to create flat bottom.

EFFECT: decreased ore costs and volume of work in block, decreased ore losses due to total ore loading and block bottom cleaning with casing packer with remote control.

4 dwg

FIELD: mining, particularly to excavate steep ore bodies, for instance kimberlite pipes, by underground method along with goaf filling with dry filler in upward order.

SUBSTANCE: method involves cutting vent, bottom and stope entries; forming vent and filling raises and ore pass; excavating ore by slice cuts; delivering ore in slice; performing filling operations in slice cuts. Before slice excavation of mining level reinforced concrete covering structures are erected in upper and lower mining level parts so that the covering structures conform horizontal kimberlite pipe section and the covering structures are supported by rock enclosing kimberlite pipe. Before each slice cut filling slice cut is isolated with flexible covering member extending along perimeter thereof and fastened to mine roof and bottom along mine length. After one slice filling ore is excavated from neighboring slice. The flexible covering member is Rabitz type steel-wire fabric, polymeric mesh or tarpaulin.

EFFECT: increased mining safety.

4 cl, 4 dwg

FIELD: mining, particularly to develop underground inclined ore deposits having mean thickness.

SUBSTANCE: method involves driving block rise workings, main slushier drifts in ledge wall; forming additional slushier drifts in ore body; connecting main and additional slushier drifts with interpanel raise mines; cutting interpanel raise mines in breakage chambers by breaking operation; slushier ore from breakage chambers to ore passes via additional slushier drifts; cutting ore passes in outfall funnels and excavating ore massif over main slushier drifts with the use of additional slushier drifts for drill around operation; communicating next interpanel rise mine with breakage chamber; cutting ore massif part over linkage heading along with breakage chamber cutting along with ore delivery in breakage chamber by blasting operation.

EFFECT: decreased losses along with increased operational safety.

2 dwg

FIELD: mining industry, particularly underground gently dipping ore deposit development.

SUBSTANCE: method involves creating preparatory-development workings; forming chambers and pillars in pairs within uncontrolled leading rock caving pitch; cutting ore in chamber; drawing main portion of cut ore under rock ledge protection so that ore slope is created; performing forced rock caving over chamber along with simultaneous roof rock block excavation over pillar; cutting the ore pillar and drawing remainder ore under caved rock and descending roof block. Chambers are cut by chamber length increase in direction transversal to second working front in several layers. Layer thickness is determined from mathematical expression. Then cut ore is drawn in end direction under rock peak protection.

EFFECT: increased ore cutting efficiency due to decreased losses and ore dilution, increased operational safety.

4 cl, 7 dwg

FIELD: mining industry, possible use during underground extraction of ore deposits.

SUBSTANCE: method includes driving a mine outlet on a level: delivery drift, orts, loading ways, contouring drift, ventilating ascending mine, and also driving drilling mines, extraction of ore panels by fans of wells in compressed environment and outlet of extracted ore according to area-end circuit simultaneously through orts and loading ways under collapsed rock with ventilation of cleaning faces due to mine depression. As drilling mines, orts of outlet level are used. Ore panels are extracted which have rhombus-shaped cross-section, in layers of varying thickness. Outlet of extracted ore is conducted along these layers, alternating area-end circuit of outlet of extracted ore of one layer with end circuit of ore outlet of other layer. Rational parameters of exiting layers of extracted ore - width and thickness of layers - are determined from analytical expressions. Layer-wise outlet of extracted ore is performed in equal batches from loading way and ort or in 2:1 ratio respectively. Ventilation of cleaning faces is performed by feeding a flow of fresh air through delivery drift and orts with following release of polluted jet through loading ways into contouring drift and further into ventilating ascending mine.

EFFECT: increased quality and fullness of ore extraction, increased safety.

4 cl, 3 dwg

FIELD: mining industry, possible use during underground extraction of ore deposits.

SUBSTANCE: method includes driving field level and sub-level transport drifts, slope, ramp, ways to ore block and solid undermining on main level and sub-levels, driving of cut-off ore upraises, which are divided on cut-off slits, drilling of parallel wells and following breakage of main sub-level resources. Ore is let out through ends of ways on each sub-level, starting from uppermost. Before driving preparatory mines, a chamber is constructed below main level, volume of which equals the volume of rock from driving of field mines, and metallic mesh is placed onto soils of chamber and undermining section.

EFFECT: increased efficiency of deposit extraction, decreased volumes of driving operations conducted with usage of high productivity equipment, lower ore losses in blocks, decreased impoverishment of ore with rock.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes conditional separation of levels on chambers, which are made in form of stretched upwards hexahedron and placed in staggered order, at each lower level with displacement for half of chamber width in comparison to upper one. Preparation of each lower level is performed by driving field drift of main level, from which entries to ore deposit and orts to hanging side of deposit are driven, from orts ascending drifts are made and cut with cutting slits. For extraction of field resources a field sub-level drift is driven, entries and ore sub-level drift near lying side, from where orts are driven, from drift well fans are drilled and main resources of level are exploded through cutting slit. Outlet of ore from each chamber is performed through ends of outlet mines in main and intermediate levels. After removing main resources inter-level block is destroyed and ore from it is removed through entries of main level.

EFFECT: higher efficiency.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes preparation and well extraction of resources of chambers with partial backfill of extraction space. Blocks of upper level relatively to blocks of lower level are placed in staggered order, while blocks are made in form of a stretched upwards hexahedron. Resources of block within one hexahedron are separated on two chambers, one of which, placed along periphery of hexahedron, after extraction and removal of ore from it is filled by hardening backfill. Second order chamber is made of hexahedron-like shape, extracted and removed under protection from artificial block on all six sides of this chamber. Removal of ore from first order chambers is performed through one removal mine - end of level ort and cross-cut in lower portion of block and intermediate sub-level cross-cuts.

EFFECT: higher efficiency.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes driving ventilation-backfill and drilling-loading gains, extraction of mineral resource by cross-directed chambers of rhombic or ellipsoidal shape, with displacement of adjacent levels chambers for half their width, with extraction of ore by wells explosion and backfill of extracted space. Directly above upper level protective ceiling is constructed with slant 5-6° towards hanging side of deposit. Width, height of chambers an height of upper level chambers, slanting angle of side walls of chambers is determined from mathematical expressions, on basis of stable calculated span of protective ceiling, width of drilling-loading gain and angle of inner friction of ore massif. After construction of protective ceiling ore in chamber is extracted by mines by exploding wells in compressed environment, while next mine is extracted after backfill of previous one. In unstable rocks, prone to cave-in, face of cleaning chambers is slanted at angle, appropriate to angle of natural slant of ore massif. In ores with rock layers cleaning chambers face is slanted at angle, appropriate for angle of falling of ore deposit.

EFFECT: higher safety, higher efficiency.

3 cl, 4 dwg

FIELD: mining industry.

SUBSTANCE: preparation of resources of ore body is performed by driving in main level and on other levels of field backup drifts, from which drifts are driven and along lying side ore trench drifts are driven. Resources of levels are separated on sections, in each of which ascending lines are driven, from which sub-level ore drifts are driven and then ascending lines are cut on cut slits. Extraction of block deposits is realized via deep wells from trench drift and sub-level ore drifts. Outlet of ore mass is performed through ends of drifts into field drifts of levels and main level.

EFFECT: lower dilution and ore losses.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes preparation of bottoms of blocks by driving drifts at main level from field backup drift, from which along lying side ore trench drift is driven, following extraction of block resources is performed from trench drift and sub-level mines. Outlet of ore mass is performed through drifts ends.

EFFECT: lower dilution and ore losses.

2 dwg

FIELD: mining industry.

SUBSTANCE: method includes extraction of deposits by panels, wherein drilling ascending lines are driven, drilling of wells fans from ascending lines and following extraction of mineral resource. Extraction of resources is performed in upward direction, while ascending lines are driven with deepening in rocks of lying block, concurrently on its soil metallic sheets are placed, on which firstly rocks are extracted, which are ten sent to previously extracted chambers. Extracted ore mass is let out of chamber and loaded at main level.

EFFECT: higher intensiveness of extraction, higher ore yield, decreased dilution.

3 dwg

FIELD: mining industry, particularly for underground ore deposit mining.

SUBSTANCE: method involves mining the deposit by rooms in which raise drills are bored; drilling wells arranged in fan-like array and cutting mineral. Raise drill is deepened in lower wall rock and bottom thereof is covered with metal sheets. Ore is cut in parts simultaneously with rock excavation in the range from raise drill ground to room ground at original ore mass slope angle.

EFFECT: increased cutting intensity, reduced ore losses in lower wall rock at room fender due to impoverishment thereof.

3 dwg

FIELD: mining, particularly ore deposit development.

SUBSTANCE: method involves drilling sublevel drifts or crossdrifts, haulage roadways and drives along with cut rock unloading through drive ends, wherein drives extend for the full height and over full cross-section from haulage roadways; closing upper parts of drive ends with shields or crossbars before rock unloading so that shields or crossbars reach end part of unloading entries; discharging cut ore through lower parts of drive ends; increasing drive end widths and reducing lengths thereof for value determined from mathematical expressions taking into consideration height of main and end parts of unloading entry, depth of loading device bucket and natural inclination angles of ore mass to be discharged and generating line of ore bed.

EFFECT: increased efficiency of ore field development.

3 dwg

FIELD: mining, particularly underground mining.

SUBSTANCE: device comprises support member pivotally connected to enclosing member. The enclosing member is secured to posts by jack and is installed at an angle enough for ore mass sliding down. Lower part of enclosing member is located at height enough for loader bucket operation. Enclosing member length defined between mine roof and above enclosing member location height is determined from mathematical expression. Enclosing member width is equal to mine width.

EFFECT: increased effective cross-section of ore mass to be drawn and, as a result, increased ore piece dimensions, reduced mine driving volume, decreased losses and ore dilution, increased output.

2 dwg

FIELD: mining, particularly underground ore deposit development.

SUBSTANCE: method involves dividing ore deposit into mining levels, cutting the mining levels in descending order and filling excavated space with hardening filling material, wherein filling material is supplied from day surface via main filling holes drilled in ledge wall rock outside shifting zone, which is formed in ledge wall rock during full ore deposit development. The first layer is cut from one mining level boundary along ore deposit strike in direction to another mining level boundary. Additional filling holes are drilled in zone defined by two lines before the first mining level cutting. The first line is extension of resulting excavated space boundary from ledge wall side. The second line is extension of the first mining level boundary along ore deposit strike, from which mining level is cut. Main filling holes are drilled before putting additional filling hole out of operation. If additional filling holes are arranged within the shifting zone forming in ledge wall rock during full ore deposit cutting additional holes are operated up to cleaning work development stage. At cleaning work development stage additional well deformation is equal to threshold deformation values. Safe additional hole operation is impossible if deformations exceed above threshold values. In particular case additional filling holes are made along bisector of angle defined by two lines, namely by the first line, which is extension of resulting excavated space boundary from ledge wall side, and by the second line, which is extension of the first mining level boundary along ore deposit strike, from which mining level is cut.

EFFECT: reduced mine construction time.

2 cl, 2 dwg, 1 ex

Up!