Method for developing area of flat and slope seam liable to rock-bumps
SUBSTANCE: extracted core of expendable wells helps to define the outline of bed pinching-out at the area, inside the outline the limits of its standard power are registered and on the base of their average position of seam strike the contoured workings are passed. First cuts are located perpendicular to contoured workings upslope or down-dip and till the outline of bed pinching-out and separate the area to paired blocks. Beginning from the end of each paired block and by moving the front line of extraction by reverse movement there are adjacent extraction workings going from the first cuts to both sides with axes shift and parallel to contoured workings; adjacent extraction workings help to extract the bed selectively and are performed with ground and roof breaking, between the paired blocks there remained are solid blocks with width not more than 10% of abutment pressure zone. Each paired block has formed groups of under-goaf and one support solid block. During seam extraction there drilled are prognostic holes and control the degree of rock-bump hazard is performed, if it is revealed the support solid blocks are unloaded.
EFFECT: increase of safety of developing the area of flat and slope seam liable to rock-bumps and reduction of mineral product losses due to involvement of bed pinching-out areas into actual mining.
3 cl, 3 dwg
The invention relates to mining, and in particular to technology development tend to geodynamic phenomena flat and inclined bump hazard layers in areas of limited conditional power until the seepage.
There is a method of development of the Starobin Deposit of salts, leaving mezhdurebernyh and block pillar (see Permiakov, R.S., Proskuryakov NM Sudden release of gas and salt. Leningrad, Nedra, 1972, 49-52). In this way a mine field potash mine ventilation and transport drifts are divided into panels and polypanel and polypanel traffic and block the ventilation drifts into blocks. The recess salt blocks are cameras charged to loss mezhdurebernyh pillars, by changing the width of which maintain their smooth deformation and fracture prevention critical pressure on the roof. This method provides control of the roof due to the reduction of stress and pliability of pillars with a gradual decline in the rate of deformation. However, the main disadvantage of this method is the lack of control for limiting the span of the roof at the intensive destruction mezhdurebernyh pillars that rockburst-hazardous reservoir associated with intensive prigruzkoj on mezhdublokovite pillars and their subsequent destruction in geodynamic form.
The known method development p is astou chamber-and-pillar system with holding the camera and leaving mezhdurebernyh pillars (see Shevyakov L.D. Development of mineral deposits, M-L., Whiteheaded, 1953, s.400-402). By this method from drifts spend chambers separated from each other mezhdurebernye whole, which then work backward from the benches, and width are selected on the principle of exclusion of peregruzok from the pressure of the roof based on the weight of the rocks above the dome of the natural equilibrium. The method allows to remove the layer with reversible podvigina faces and to control the roof. However, the disadvantage of this method is the lack of assessment of the roof with the rise of a goaf mining the pillars of the benches. On rockburst-hazardous seam lack of control influence the length of a goaf affects the resulting stress concentration on the core and edge of the reservoir, and removing the pillars of the benches without limitation of the geometric parameters leads to the formation of foci of geodynamic phenomena and their immediate manifestation, therefore, the method for developing bump hazard layers ineffective.
The closest to the technical nature of the claimed method is a method of mining coal seams short faces chamber system with barrier pillars (see Methodological guide geomechanical parameters of the technology is asrabadi coal seams short faces, SPb., Research Institute, 2003, p.6-15)adopted for the prototype, including the sinking of contour cutting and excavation workings, the stability plot columns, define the width of the zone of support pressure and control categories". According to this way to the borders of the mine field drifts are the main directions and from successive strips work panels, which are a group of parallel cells, which partially remove the reservoir. Between the exhaust chambers leave Mezhdunarodnye pillars and support goaf or their group, leaving the part of the panel, or with additional separation barrier pillars, which are periodically alternated with group mezhdurebernyh pillars. The method allows to extract significant coal reserves in conditions where high lava ineffective under the terms of the occurrence of layers associated with reduced lengths as their complex configuration and variability in thickness, geological disturbance.
The disadvantage of this method variant only mezhdurebernyh pillar is the difficulty of determining their optimal number on the site and establish the geometric parameters in cross-section, causing the group to the destruction of large areas of uncontrolled collapse of the roof, wlecome is for a rockburst-hazardous reservoir geodynamic manifestations of rock pressure. In a variant of the leaving group mezhdurebernyh and barrier pillars in uncured, for example, power, or area of occurrence conditions of the reservoir there is no justification for the optimal distance between barrier pillars, and the calculations of the geometric dimensions of pillars, built on the principle of balancing the current load and carrying capacity, in such conditions due to fluctuations in the level of prigruzki have significant errors due to inconsistencies valid geomechanical state and those other pillars.
These disadvantages of the method create provoking uncontrollable destruction of pillars with geodynamic manifestations and subsequent uncontrolled roof caving in already worked the cameras and the cameras, where the extraction of coal. Development of rockburst-hazardous areas of the reservoir with constraints on conditional power with the transition to the pinch because of their irregularity and unevenness in a stronger degree sensitive to the convergence of the roof and soil requirements rationale the functional characteristics of the training blocks and orderly abandonment of pillars reasonable geometrical dimensions, therefore, direct application of variants of this method on the specified rockburst-hazardous areas is inefficient.
The claimed method solves tasks is safe excavation rockburst-hazardous areas of the reservoir, having restrictions on conditional power with the transition to the pinch, where high-performance long treatment the face is unacceptable.
The technical result to be obtained from use of the inventive method, is to improve the safety of mining areas flat and inclined bump hazard layers and reducing the loss of the mineral due to involvement in the clean-out recess plots his thinning.
This technical result is achieved in that in the method of development of the site is sloping and sloping rockburst-hazardous reservoir, including the sinking of contour cutting and excavation workings, the stability plot columns, define the width of the zone of support pressure and control categories", according to the invention, the extracted core exploration wells to determine the path of seepage reservoir on the site, register the inside contour conforming boundaries of his power and their average position along the strike of the formation are contour generation, which is perpendicular to them by rebellion or fall until the circuit between the reservoir are split develop and divide their land for the pair of blocks, then starting from the end of each pair of block and podvigina front notch backward from the slotted openings in the two hundred and the ons offset and parallel to the contour workings are adjacent, separated by pillars mining production, which selectively remove the layer and which are bomb it with soil or roof seam, leave between the paired blocks of the pillars of a width not exceeding 10% of the area of the reference pressure, and each pair block form groups of mojavelinux and one supporting pillar. This pujavaliya pillars leave a width not exceeding 10% of the area of the reference pressure and the reference pillars formed with a width determined from the condition for the sustainability of the deflection of the main roof with a length of not more than 80% of its ultimate passage. Paired blocks of work to the security pillar, which form a width of not less than 50% of the area of the reference pressure and leave along the contour of mine. Simultaneously with removing the layer of extraction openings in the side of the supporting pillars of the Buryat forecast holes and measure the volume of drilling out the little things, which control the degree of", and if it finds it dangerous categories of support pillars to unload non-hazardous categories, for example, by drilling the relief wells.
The method is illustrated by drawings, where figure 1 shows a diagram of the testing site directional and/or inclined rockburst-hazardous reservoir that have restrictions on conditional power with the transition to pinch; figure 2 shows a section transverse to the extension of the reservoir profile is Cerignola working driving the decline and abandonment mojavelinux and reference blocks; figure 3 in the context of the supporting pillar is shown opposite the drilling of its forward-looking holes and discharge holes.
The method is carried out in the following sequence.
In exploration drilling of coal reserves in the reservoir 1 on the extracted core wells define the contour 2 of the seepage layer 1, register inside the loop 2 border 3 conforming his power and by their averaged values along the strike of the reservoir 1 from nearby transportation tunnel 4 are contour generation 5, which is perpendicular to the rebellion (with the path on the opposite side - on crash) and to loop 2 of seepage reservoir 1 are split generation 6 and divide their land for the pair of blocks 7.
Starting from the end of each pair of unit 7, are partial excavation of the reservoir 1 with podvigina front-reverse (figures 1 and 2 arrows), which split from openings 6 in parallel contouring workings 5 are adjacent excavation generation 8. They are in both sides of the slotted openings 6 and offset. Excavation workings 8 layer is extracted selectively, if their height exceeds the capacity of the up-dip of the reservoir 1, and in the roof or ground to expose the rock mass, which is extracted individually with bomb it. Excavation generation 8 pass length to half the width of pair BC the Cove 7, you take from terms in the effective range of schreberiana coal to slotted openings 6. Between the adjacent pair of blocks 7 on the ends of excavation excavations 8 leave the jumper layer in the form of extended pillar 9 of a width not exceeding 10% of the area of the reference pressure, which is determined by nomograms guidance documents in depth the development and capacity of the reservoir 1.
Excavation generation 8 are forming groups of mojavelinux 10 and one reference 11 pillars. Pujavaliya pillars 10, similarly mizubaku, leave a width not exceeding 10% of the area bearing pressure not to implement them with additional unloading activities, and supporting pillars formed with an increased width, which is determined from the condition for the sustainability of the deflection of the main roof with a length of not more than 80% of its ultimate passage, which is installed on the experience of reservoir development on sites of conditioned power or rely on strength, power, and structural weakening of the roof. The pair of blocks 7 to develop the security pillar 12, which are left along the contour openings 5 in accordance with the instructions and recommendations of the sustainable maintenance of stationary preparatory and major roadways. When this security pillars 12 is formed of a width not less than 50% of the area of the reference pressure.
In terms of the s the " mined seam 1 together with its partial extraction of the extraction openings 8 in the side of the supporting pillars 11 are drilling forecast holes 13 and measure the volume of drilling out the little things during drilling, by which to determine the amount of the". When it detects dangerous for the category of supporting pillars, for example, razvarivat counter unloading wells 14 by overlapping their ends and spacing provide non-hazardous category.
Development of the site is sloping and sloping bump hazard layer of the claimed method allows for safe excavation in places that have restrictions on conditional power with the transition to pinch, and engage in treatment works parts of a mine field, charged with the work of the high lava geological conditions of occurrence of loss. Site preparation of a mine field, including the sinking of contouring, cutting and excavation workings with the formation of paired blocks, provides within the mine fields everywhere removing the layer with the limitations of standard output.
The width of the pillar between the paired blocks and between adjacent excavation workings, limited to 10% of the area of the reference pressure, is a condition of the acquisition of such pillars give up to a quiet smooth fracture after excavation of reservoir fluctuations rock pressure. At the same time, the width of the supporting pillars, calculated from the stability condition of the main roof with a length of not more than 80% of the limit of the span of the roof, maintains safe supports the neigh excavation excavations during the extraction of the reservoir, and forecast and unloading drilling support pillars eliminates the formation of a foci of geodynamic phenomena. Doing work paired blocks perpendicular to the contour workings and offset axes adjacent to probloem and blocks excavation excavations to be undertaken in parallel contouring creates a uniform load distribution over the area of the development taking into account the maximum span of the roof and peregruzok on the support and pujavaliya pillars. Security pillars with a width of not less than 50% of the area bearing pressure along the contour openings allow you to maintain uninterrupted transportation of coal from the site of the development and to protect it from the impact of mining operations on the adjoining sections of a mine field.
This embodiment of the method expands the boundaries of the extraction bump hazard layers conforming with the geological constraints while ensuring safe operation of sewage treatment works prevention of geodynamic phenomena and maintain the stability of tunnels. Compared with the prototype, keeping intervals between groups of mojavelinux and supporting pillars linked with the utmost span of the roof, the forecast and the discharge control them in the category of " systematic and geometric preparation of sections of a mine field when geomechanical reasonable size and have access to the exact bearing capacity of the supporting pillars with give mojavelinux provide exception of the formation of the " with its implementation in the form geodinamicheskih phenomena and caused uncontrolled caving the roof on the plot development.
1. Method development of the site is sloping and sloping rockburst-hazardous reservoir, including the sinking of contour cutting and excavation workings, the stability plot columns, define the width of the zone of support pressure and control categories", characterized in that the extracted core exploration wells to determine the path of seepage reservoir on the site, register the inside contour conforming boundaries of his power and their average position along the strike of the formation are contour generation, which is perpendicular to them by rebellion or fall until the circuit between the reservoir are split develop and divide their land for the pair of blocks, then, starting from the end of each block pair and podvigina front notch backward from the slotted openings in both sides of the offset and parallel to the contour workings are separated by adjacent pillars mining production, which selectively remove the layer and which are bomb it with soil or roof seam, leave between the paired blocks of the pillars of a width not exceeding 10% of the area of the reference pressure, in each pair block form groups of mojavelinux and one supporting pillar, while supporting pillars formed with a width determined from the conditions the sustainability of the deflection of the main roof with a length of not more than 80% of its ultimate passage, paired blocks of work to the security pillar, which leaves along the contour of the workings, simultaneously with removing the layer of extraction openings in the side of the supporting pillars of the Buryat forecast holes and measure the volume of drilling out the little things, which control the degree of", and if it finds it dangerous categories of support pillars to unload non-hazardous categories, for example, by drilling the relief wells.
2. The method according to claim 1, characterized in that pujavaliya pillars leave a width not exceeding 10% of the area of the reference pressure.
3. The method according to claim 1, characterized in that the protective pillars form of a width not less than 50% of the area of the reference pressure.
SUBSTANCE: mining method by large blocks includes advanced formation of bed underbreaking by plough machine with movement of conveyor into it for output of rectangular blocks of mineral cut from long face above it by cutting longitudinal and lateral slots with the use of supports. The output of alluvial mineral from plough operation is done by separate chain-and-flight conveyor. Plough operation in ripping lip is done simultaneously with cutting mineral blocks from the bed upper part by cutting longitudinal and lateral slots by cutting machines and loading of mineral blocks extracted from long face by transfer platform as well as their locomotive haulage from long face to the point of their discharge into grinding chamber.
EFFECT: invention provides multiple increase of mining face productivity in comparison to the existing level, creation of safe by gas factor and ecologically pure by dust production.
6 cl, 15 dwg
SUBSTANCE: method includes driving of development-temporary workings, working off of primordial chambers of tapered section, their filling with curing mixture forming artificial pillars, formation of massive ore pillar between artificial pillars. Rock pressure is reallocated on artificial pillars. Touchdown working is driven along ore pillar symmetry axis by contact with ore deposits in overlying roof rocks. Blasting wells are drilled from it radially within outlines of natural arches so that ends of these wells most accurately form sizes and surface of line of natural arches in compliance with estimated ultimate strength of overlying rock massif. Complete discharge of massive ore pillar is performed by induced caving of roof rock between artificial pillars on chambers expanding upwards, support of artificial pillars by caved rock is provided. Massive ore pillar stocks are developed with support of overlying roof rock by natural arches resting upon artificial pillars and retaining slopes formed near side surfaces of artificial pillars during loading of broken ore.
EFFECT: increasing reliability of rock pressure control and labour safety.
2 cl, 4 dwg
FIELD: process engineering.
SUBSTANCE: invention relates to mining and may be used in ore dressing. Proposed complex comprises receiving hopper, crushing and screening unit, assembly to feed ore to separation, ore control station, ore lump separators, concentrate and reject discharge conveyors arranged in underground openings. Assemblies feeding ore to separation and X-ray-type separators are arranged on two levels in long openings communicated by box holes to accumulate and feed ore to separators by gates arranged at their outlets. Said box holes are located at 5-7 mm from each other to feature diameter of 1.0-1.5 mm. Assembly feeding ore to separation represents combination of openings, each being 120-40 0m-long and having 2.5-3 m-diameter, and connected with crushing and screening assembly to allow every opening to feed ore of particular size grade to box hole. Every separator comprises, at least, one additional channel for cleaning rejects after separation of concentrate in main channel. Conveyor belts of said main and additional channels are located one above the other. Openings accommodating said assembly feeding ore to separation and separators are spaced apart for 15-20 m along vertical. X-ray-type separator channel comprises, at least, one x-ray useful component content analyser connected with separation device made up of, at least, one pneumatic blowout nozzle. Every aforesaid assembly is equipped with conveyor provided with unloading device driven along openings length. Crushing and screening unit allows producing four flows of ore sized to (-300+120), (-120+50), (-50+15), (-15+0) mm, with (-15+0) mm-ore directed to concentrate discharge conveyor, the remaining flows being used for filling box holes.
EFFECT: higher efficiency of separation and quality of concentrate, reduced costs.
8 cl, 3 dwg
SUBSTANCE: method to increase stability of a ceiling in downward slicing development of a deposit with backfilling includes serial tunnelling and backfilling of parallel mines - stope entries, leaving ore pillars with width equal to one, two or three spans of mines, backfilling of mines with a concrete mix, and after backfilling hardens, ore pillars left between concrete strips are mined. At the same time the vault of stope entries is arranged as deep, besides, ore pillars are left in the roof between concrete backfilling of adjacent stope entries.
EFFECT: higher stability of a mine ceiling.
SUBSTANCE: extraction sections or blocks are mined with vertical cuts including two vertical layers of various thickness, the internal one of which is mined by means of drilling method of large-diameter scavenger wells and external one is not mined. In order to ensure safe labour conditions at upper drilling level and uniform output of mineral deposit extracted during large-diameter well drilling, drilling of those wells is performed by shrinking of broken mine rock in them. If the deposit is represented with a bench of conformable beds, the cutting height is accepted equal to total thickness of all beds of that bench, including intermediate rocks. Drilling of scavenger wells is performed throughout the cutting height with shrinkage of broken mine rock in them, and separation of mineral deposit and hollow rock is performed at the stage of general release of racks by means of selective bed-by-bed supply.
EFFECT: creation of safe conditions from the point of view of hydrogeology for high-efficiency development of reserves of extraction sections or blocks outlined with natural or artificial barrier or inter-block pillars.
3 cl, 2 dwg
SUBSTANCE: weakening a spring of natural balance at both sides of the block and damaging a key stone is done simultaneously by exploding rows of parallel wells drilled at the borders with interchamber sight pillars and along the axial line of the stope, in sections length of which is equal to the thickness of the damaged layer. Weakening of the spring at both sides of the block and damaging of the key stone is done by sectional explosion of clusters of parallel adjacent wells: linear ones at borders with interchamber sight pillars and bulk ones along the axial line of the block. The spring at both sides of the block is weakened ahead of erection of artificial interchamber sight pillars.
EFFECT: improved efficiency and safety of production works.
3 cl, 4 dwg
SUBSTANCE: when developing mineral deposits in the form of ore bodies, ore zones are divided along the depth into stories and levels and are mined top-down with sloughing of the above rock massif or filling of the mined space with foreign ground material with lower strength and resistance of rock massif. Ore bodies are mined bottom-up with a layer method with the limited minable width of the layer using the bore hole method from drilling crosscuts with application of drilling mechanisms and conveyor transportation of ore material. Parameters of the broken layer comply with receiving capacity of conveyors that supply the material into the ore chute, and from there into the transport lifting vessel. Mining is carried out starting from the hanging wall of the deposit, and gradually, layer by layer is mined towards the underwall of the deposit. To collect the material sliding off the conveyor flight and during mining of intermediate layers between the extraction ones along the height and ground later, trenches are developed at the bottom. From the trenches the material is sent to a common conveyor via chutes.
EFFECT: complete mining of the deposit, prevention of weakening in the surrounding massif of the mined space.
SUBSTANCE: air supplying gate and the main air gate pass along opposite boundaries of mine field so that they run ahead of extraction front through the length equal to distance between axes of the rooms. At that, rooms have the length equal to width of mine field and are located between air supplying gate and ventilation air gate. Fresh air is supplied through the tunnel located in front of extraction front. At that, return ventilation air is removed along auxiliary air gate.
EFFECT: improving concentration of mining operations, reducing volumes of preparatory mine work, and decreasing air leaks through the worked-out area.
SUBSTANCE: method consists in maintaining the stable state of worked-out area with inter-chamber support pillars; at that, sizes of inter-chamber support pillars are determined from actual pressure of rocks on them, which are located inside the natural arch in its final position, and the pillar located at the joint of natural arches is determined considering the pressure on abutments of arches of those rocks which are located above the outlines of natural arches.
EFFECT: reducing the losses of developed mineral resources and improving the safety of mining operations.
SUBSTANCE: method for development of thick flat beds of minerals includes division into layers, arrangement of development openings in upper and lower layers, strengthening of development openings. Layers are developed downstream in longwalls. Development openings of lower layer pass under edge portion of bed, formed in process of upper layer longwalls development. Prior to arrangement of development openings in the lower layer, edge part of bed is weakened over route of development openings arrangement in the lower layer, for instance, by means of wells drilling in bed or creation of slot in bed. Development openings of the lower layer are fixed by anchors, at the same time depth of bed weakening is accepted as larger than width of development opening in the lower layer. Length of anchors is accepted as larger than distance from lower layer openings to bed roof, and depth of bed weakening above route of lower layer development openings arrangement is determined from the expression.
EFFECT: invention makes it possible to reduce labour intensiveness of works and costs for strengthening, to increase speed of development openings arrangement.
2 cl, 2 dwg
FIELD: mining industry.
SUBSTANCE: method includes use of screw-drilling machine for driving of several first ventilation shafts in ore body and driving several second shafts, while second and each second shaft crosses, at least, one matching first shaft, forming first support walls, supporting ceiling. First supporting ceilings consist of ore body zones between neighboring second shafts, each first support wall has portion of at least one first shaft, passing horizontally through it. Horizontal channels are formed, each of which is placed transversely to matching second shaft between appropriate portions of first shaft, formed in adjacent support walls, for forming of group of continuous ventilation shafts. Second shafts are filled for forming second supporting walls, supporting well ceiling, and first supporting walls are extracted. First ventilation shafts can be made parallel to each other. Second shafts may be directed perpendicularly relatively to first ventilation shafts. In ore body air-outlet and air-inlet ventilation mines can be formed, placed at distance from each other along horizontal line, while first or each first ventilation shaft passes through portion of ore body between air-inlet and air-outlet ventilation mines. Driving of second or each second shaft can be performed by cutting machine, or by drilling or explosive mining.
EFFECT: higher efficiency.
7 cl, 11 dwg
FIELD: mining industry.
SUBSTANCE: method includes partial filling of extracted space of side and central mains by filling stripes from lava extracting shafts. At center of semi-lava on the side of massive, wherein next extractive column will be cut, filling shaft is additionally driven, wherefrom full filling of space between central fill stripe and fill stripe on the side of massive is performed. Preparation of next extraction column is performed under protection of erected fill stripes.
EFFECT: higher safety, higher efficiency.
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
FIELD: mining industry.
SUBSTANCE: method includes extraction of mineral resource by underground mine method in liquid environment, under protection of water-resistant rock massif. Full flooding of auxiliary extracting and preparatory mines is performed, which provide for start of wiping operations, with working liquid, neutral relatively to mineral resource and enveloping rocks and being under pressure, matching value of pressure at depth of mine. Process of removal of separated rock beyond underground flooded space is synchronized with replenishment of working liquid volume in this space. Working liquid pressure can be formed by effecting it with force liquid, which is placed either in mine shaft, hydraulically connected to lower flooded auxiliary extracting mine, or in mine shaft and force column, placed on earth surface, above mine shaft, and hydraulically connected thereto. Required height of force liquid column is determined from mathematical expressions. After mineral resource extraction is finished within mine field, flooded extracted space is used for placement of toxic and non-toxic wastes of industries or strategic objects, while process of transfer of wastes or strategic objects into liquid environment is performed synchronously with removal of working liquid beyond flooded space in volume, equal to volume of transferred wastes or strategic objects.
EFFECT: higher safety.
3 cl, 1 dwg, 1 ex
FIELD: mining industry.
SUBSTANCE: method includes separating resources of all levels on blocks, in form of upwardly elongated hexahedrons. Blocks on adjacent levels are positioned in staggered order with displacement of some of them relatively to others for half of blocks width. Resources of each block within limits of hexahedron are divided on two portions: hexagonal chamber inside the block and block itself of same hexagonal shape on all six sides of chamber. Preparation and cutting of chamber resources is realized by driving field level drifts and mines, intermediate sub-level drifts and mines, and also level and sub-level orts and drifts, driven through mineral resource, from which resources of chambers and blocks are drilled and exploded. Extraction and outlet of mineral resource is performed in three rows - first chamber resources, than inter-chamber blocks under protection of ceiling blocks, after that ceiling blocks deposits. Outlet of resources from chambers and blocks is performed trough ends of level orts and mines, an also through ends of intermediate sub-level mines.
EFFECT: better use of mineral resources, lower laboriousness, lower costs, decreased block preparation time.
FIELD: mining industry.
SUBSTANCE: method includes determining width of edge zones of block, subjected to influence from support pressure, then preparatory mines are driven along block at limits of these zones and permanent rigid supports are erected therein. After that portion of block from preparatory mines to block center is extracted.
EFFECT: increased mineral resource yield coefficient, safer extraction of inter-panel support blocks, without breaking their carrying ability and without using backfill materials.
FIELD: mining industry.
SUBSTANCE: method includes dividing a level on hexahedral sections of upwardly elongated shape and is prepared by driving of field backup drift. From drift below each section shafts are driven, from which along mineral resource ascending shafts are drilled. For drilling chambers deposits by wells, sub-level drift is driven along mineral resource, access to which is provided by driving field sub-level drift and shafts. Outlet of extracted rock is performed through ends of shafts. After letting out rock from all sections ceiling beam is brought down and also let out through ends of shafts.
EFFECT: lower laboriousness, lower costs, higher efficiency, higher personnel safety.
FIELD: mining industry.
SUBSTANCE: 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.
EFFECT: lower laboriousness, lower costs, higher efficiency, higher personnel safety.
FIELD: mining industry, particularly methods of underground mining.
SUBSTANCE: method involves advancing breakage face in under-roof layer; drilling bores in the under-roof layer and injecting weakening reagent to separate zones through the bores; drilling blind drift in front of the breakage face, wherein the blind drift has length of not less than breakage face length; drilling bores for following weakening reagent injection from the blind bore; additionally boring intermediate bores between above bores for following gas exhausting; performing under-roof layer development so that non-developed bank is left directly above breakage face support; performing stepwise weakening reagent injection into corresponding bores and evacuating gas from intermediate bores; leaving bores filled with weakening reagent for 1-2 days and supplying the weakening reagent into intermediate bores.
EFFECT: increased efficiency of mineral preparation.
3 cl, 3 dwg
FIELD: mining, particularly methods of underground mining.
SUBSTANCE: 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.
EFFECT: increased output, improved safety and ecology.
3 cl, 14 dwg