Method of preventing flooding of potash mine over reef array

FIELD: mining.

SUBSTANCE: method involves panel-block preparation of reserves and development of sylvinite beds by system of chambers. Prior to mining, seismic exploration is carried out, the boundary of reef array spreading in the subsalt layer and the sections with dip angle of reef array roof more than 2.5 degrees are determined. Then the mining direction of potassium ores is selected so that temporary and permanent boundaries for development of beds together with their alignment of selected sections on the plan are sub perpendicular along the strike of the boundaries of the reef array. In the case of alignment of the development boundaries with reef array sections with roof dip angle more than 2.5 degrees with the non-perpendicular position of mining boundaries and the boundaries of reef array, and in case of stretching deformations in the water-protective layer due to their increase towards rood dip of the reef array, the limits of areas of inactive mining operations are advanced from the boundaries of the reef array by carrying on the development and transferring the area of stretching deformations to compression state.

EFFECT: prevention of extreme situations at potassium mine.

1 cl

 



 

Same patents:

FIELD: mining.

SUBSTANCE: method of working-out backfilling in flooded potassium mine involves well drilling, preparation of pulp by mixing carrying liquid and solid particles, supply of pulp through wells to flooded working-outs, and backfilling of working-outs. Drilling of injection well and well for liquid pumping-out is performed from day surface to flooded working-out meant for backfilling. Carrying liquid for pulp preparation is taken from flooded backfilled working-out on the level of its soil through the nearest well of the drilled wells. After excess pressure appears on the mouth of the injection well, pulp is supplied continuously; total supply volume of pulp solid particles to the mine through the injection well does not exceed the volume of possible liquid filtration through a sinkhole formed during flooding of potassium mine.

EFFECT: invention allows reducing the deposition of ground surface above flooded mine owing to preventing probable leaching.

1 dwg

FIELD: mining.

SUBSTANCE: method for vertical borehole reconstruction includes the following stages: mounting of water-proof and backfill formwork, reinforcement mounting, filling of backfill gap between the formwork and borehole lining by compound on the base of aqua-gel and its following displacement by concrete-sand solution. Note that backfill gap is filled through sectoral-perforated pipes structurally included into the metal formwork.

EFFECT: improvement of water-proof properties of borehole lining.

9 cl, 3 dwg

FIELD: mining.

SUBSTANCE: according to the proposed method, a film of water emulsion is applied onto surface of mines, which is made on the basis of hydrophilic media, for instance, on the basis of products of tar deasphalting - pyrobitumens.

EFFECT: reduced cost of dampproofing, reduced time of technological operations performance, and also higher reliability of mine dampproofing.

6 cl

FIELD: mining.

SUBSTANCE: method to eliminate inflows via lining in collectors from high-precision units consists in elimination of water inflow in coupling units of assembly elements of structure by means of sealing gaps and cracks between blocks by installation of injector and injection of sealing compound into seams between blocks. Injection is made in joint of coupling planes of assembly elements. At the same time previously specified area of water inflow is confined by drilling of at least two key holes in plane of coupled joints for depth of block sealant location at the distance from each of key holes to area of injection equal to 1.0-1.5 of distance from surface of block to block sealant. Then sealing keys are installed with material having bearing strength of at least 5 MPa/cm2 into each of key holes, afterwards sealing compound is injected.

EFFECT: increased strength of injected joints and reduced consumption of expensive hydraulic insulation material.

8 cl, 1 dwg

FIELD: construction.

SUBSTANCE: device consists of panels, supports and water intake chute. The panels have U-shaped flanged cross sections. The flanges and ribs of panels are different with regard to the required width and height along the corresponding sides of U-shaped cross section. The upper support to the bearing lining fastener assembly and lower panels to support fastener assembly are spatially distanced and implemented so that canopy panels and effective canopy hanger can be remotely adjusted to the bearing tunnel lining regardless canopy panels width and lining elements width dimensions. The upper fastener assembly is provided with supporting element for assembling pin, for example, pivot block, with one end being fixed to the bearing lining by means of fastening element, for example, bolt and/or threaded pin and/or anchor. The other end is coupled with the assembling pin, by means of, for example, a pair of nuts with spherical surface and beveled washers. The lower panel to support fastener assembly is made from the supporting element and clamping element for panels and installed on the assembling pin. The panels are installed and fastened to ensure the required architectural geometry of arch and overflow conditions in the lower panel fastener assembly for water penetrating through the lining. The position of the lower fastener assembly is adjusted by the upper fastener assembly. The invention provides for different structural implementation of the upper fastener assembly and specific features of U-shaped panel profiles and lower fastener assembly for the includes tunnel and horizontal tunnel.

EFFECT: possibility of spatial assembling pin position adjustment and installation of canopy panels in designed position regardless arch configuration inaccuracies in underground structure; more effective, reliable and simplified hanger for canopy to be attached to bearing lining notwithstanding canopy panel width and lining width ensuring conditions of penetrating through lining water.

15 cl, 20 dwg

FIELD: mining.

SUBSTANCE: invention refers to mining and is designed for elimination of hazardous situation at instantaneous inrush of water. Massif of rock is bored around with bore holes and outpost blast holes in vicinity of a groove head. Clay material is stacked inside the contour. Explosive substances are inserted in bore and blast holes; and explosion is initiated.

EFFECT: reduced time and material costs for preparation of non-combustible material to simultaneous discharge.

1 ex, 2 dwg

FIELD: construction.

SUBSTANCE: invention relates to strengthening of the lower part of the section of the railroad tunnel and may be employed for strengthening of bases of buildings and constructions. Method includes feeding of mortar with filling agents. A shaft is drilled in the lower part of the section of the railroad tunnel above the detected emptiness for feeding of filling material and a second shaft for feeding of consolidating mortar. Feeding device is installed and filling material is supplied through it in the form of balls of waterproof material, density whereof equals or is greater than water density. Balls are compressed by means of a vibrations generator; entrained water is pressed out from the emptiness by balls either through holes in the rock or through the consolidating mortar feeding shaft. Having filled the emptiness with balls, feeding device is taken away and the shaft is sealed, consolidating mortar is supplied into the second shaft and having filled all the emptiness the shaft is sealed. Should there be no water in the emptiness one shaft is drilled in the lower part of the section of the railroad tunnel; where through emptiness are filled with balls compressed by a vibration generator, after that feeding device is taken away and consolidating mortar is supplied through the shaft. Emptiness been filled the shaft is sealed.

EFFECT: cost reduction of elimination of emptiness.

2 cl, 1 dwg

FIELD: mining.

SUBSTANCE: method comprises leaving of massifs of minerals 14 between chambers 7-13, driven at extraction of potassium salt bed 1, and filling chambers with backfill material. Bores 6 are drilled from ground surface 5 to chambers; the bores are cased with tubes. Not soluble in water backfill material is supplied into chambers via bores 6 till chambers are filled for their complete height at a point of backfill material supply. The first to be filled are chambers 7 located at proximity to the underground water inrush zone 4 from the side of the bed rise 1 of potassium salt; thereafter filling of chambers 8-10 located below underground water inrush 4 is carried out. Not solved in water, hardening, backfill materials are supplied into chambers 7-13 via bores 6. If filed chambers driven along the course of bed chambers have considerable length, the distance between bores is determined from a calculated expression.

EFFECT: invention facilitates prevention of flooding of potassium mine and hazardous deformation of the earth surface at breaks of water protective strata and underground water inrushes into mine through water permeable cracks generated in water protective strata in areas of geological disturbances.

3 cl, 2 dwg

FIELD: mining and pit protection against underground water inflow in the case of open-pit kimberlite pipe and other mineral deposits development in subpermafrost horizon.

SUBSTANCE: method involves discharging water initially contained in deposit section to be developed and precipitation water from said deposit section; drilling injection wells around kimberlite pipe perimeter and from pit bottom; performing explosions in wells surrounding kimberlite pipe perimeter and carrying-out hydraulic fracturing from wells drilled from pit bottom to create jointed subvertical and subhorizontal rock fissured zones, which have uniform fissures; supplying plugging materials therein and creating joined solid watertight diaphragms shaped as integral cups.

EFFECT: possibility to create watertight diaphragm, which protects deposit section to be developed against underground water ingress.

FIELD: mining, particularly mining and pit protection against underground water inflow in the case of open-pit kimberlite pipe and other mineral deposits development in subpermafrost horizon.

SUBSTANCE: method involves discharging water initially contained in deposit section to be developed and precipitation water from said deposit section; drilling injection wells around kimberlite pipe perimeter and performing explosions through regular system from pit bottom to create joined subvertical annular and subhorizontal rock fissured zones which have uniform fissures; supplying plugging materials therein and creating joined solid watertight diaphragms shaped as integral cups.

EFFECT: possibility to create watertight diaphragm, which protects deposit section to be developed against underground water ingress.

FIELD: mining.

SUBSTANCE: method of block preparation and profiling of contiguous flat sylvinite layers by chambers includes a driving by combine complexes simultaneously to boundaries of the extraction block, driving of sectional developments only along the top layer, formation of block ventilating developments. The broken ore is supplied through ore pass wells from the top layer on the conveyor mounted on the lower layer. The block is profiled in the inverted order. Extraction drifts are pierced by ventilating passes. On the boundary of the extraction block the flank ventilating are formed then the block is profiled. Cleaning chambers of the lower layer are pierced among themselves at the boundary of the extraction block. The block conveyor is installed in the extraction drift of the lower layer and is increased during the driving. As the block is profiled the conveyor is shortened.

EFFECT: invention allows to reduce volumes and time of pre-mining works.

4 cl, 3 dwg

FIELD: mining.

SUBSTANCE: proposed method comprises preparatory jobs, ply-by-ply stoped excavation with setting of barren formation seam on worked oil behind the mole. Working is performed with the help of mole of various operating principles. First, stope is subjected to through ventilation. For this, said stope is subjected to first cut by the mole over its entire length for communication with vent gateway. Separate ply-by-ply excavation of potash seams is made by selective, continuous or cyclic miner is executed. First, bottom productive zone of the bed is excavated and loaded into self-propelled car. Miner returned to initial position, started is excavation of barren formation seam to be left at stope soil. Thereafter, left productive formation seam is excavated and located into self-propelled car to be displaced to mine transportation means.

EFFECT: higher efficiency of ore mining.

2 cl, 3 dwg

FIELD: mining.

SUBSTANCE: formations are excavated in inverse order in a panel with aligned arrangement of chambers and pillars. Meanwhile the thinner formation is excavated by chamber-and-pillar system with regular cutting of inter-chamber belt pillars by break-throughs towards the front of pillar mining, meanwhile a ventilation of a working zone and dust air removal is performed due to mine ventilating pressure drop through the last inter-chamber break-through, and the thicker formation is excavated by chambered system with lagging from the thinner formation.

EFFECT: improvement of performance of excavation of thinner formations due to increase of extraction of minerals from subsoil by regular cutting of interchamber pillars and ensuring of efficient ventilation and dust removal from a working zone of operators of winning machines and self-propelled transportation equipment into excavated space.

2 cl, 4 dwg

FIELD: mining.

SUBSTANCE: installation for formation by dilution and accumulation of gas in salt cavern (26) formed by formation by dilution includes pipe string (70) intended for flow divergence, made so that a provision is made for interconnection as to fluid medium with two or more concentric pipes (2, 2A) in one main shaft of a well with at least one side hole (44) passing from internal passage (25) with external annular passage (24) interconnected with the surface under one set of X-tree with gate valves. Devices (25A) for flow control, flow diverters (47) and/or insulating tubes (22) can be introduced to the pipe string intended for flow divergence, which provides a possibility of changing a zone of dilution in the salt cavern to control the cavern shape. Besides, the pipe string intended for flow divergence and used for formation of cavern can also be used for dehydration and accumulation of gas.

EFFECT: enlarging technological capabilities; improving effectiveness of a cavern creation and use method.

46 cl, 109 dwg

FIELD: mining.

SUBSTANCE: invention relates to mining industry, and namely to support of mine workings and their conjugations in saliferous and saliniferous rocks, and namely at construction of responsible underground structures that allow no formation of cracks in concrete support, for example water collectors for waters not saturated with salts or conjugations of well shafts with approach mine workings and dosing chambers. First, based on mining and geological conditions of the mine working being designed, there determined is thickness of a flexible layer of the support. Then, a mine working is driven; its roof and walls are fixed with temporary anchor support. After that, the flexible layer is constructed out of polystyrene slabs by installing them tightly to the mine working rock. Then, a monolithic concrete support is erected; with that, thickness of the flexible layer of the support is determined considering the displacement speed of the rock outline of the mine working, service life of the mine working and compressibility coefficient of flexible layer material.

EFFECT: invention allows simplifying and reducing labour intensity of works on erection of a two-layer support and improving supporting efficiency due to controllability of flexible layer thickness.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: step-by-step mining of productive layers of potassic seams with advance breaking the rock salt, first shearer mining is executed in the chamber design contour over its entire length to combine it with vent drift. Blasting cutting of the entire rock salt is performed in the entire volume of cleanup chamber design contour from the walls of shearer mining drift. Cut rock salt if placed on soil of previous shearer mining. Excavation of mineral from productive layers of potassic seam is performed by heading machine. Machine drift in the chamber design contour is located subject to chamber width either at the chamber centre or on board of its design contour.

EFFECT: higher efficiency of seam working owing to complete cutting of diluting layer in chamber contour.

2 cl, 3 dwg

FIELD: mining.

SUBSTANCE: proposed method comprises chamber seal mining, working the chamber entrance from development entry, excavation of rock interlayer and shearer mining of the seam productive seams. Advance cutting of rock interlayer from the seam is performed by blasting. Mining of seam productive layer is performed by shearer mining in radial passes to design width of working chamber. The, the miner is moved to initial position of radial pass. Cut rock interlayer is placed at the soil of worked chamber.

EFFECT: possibility to work potassic small-thickness seams using the miner, ruled out replacement of digging hardware, lower costs of handling jobs.

2 cl, 3 dwg

FIELD: mining.

SUBSTANCE: proposed method comprises opening, preparing and working of the section of chambers, preparing of filling mix of potassium dressing wastes and filling of chambers. Working section is opened in drifts from overlying bed. After processing of said section by cleanup chambers, the latter are filled with filling mix with addition of calcium chloride. Filling mix is fed over drifts from overlying bed by gravity. After filling of said chambers, impermeable dams are erected at drift start. Subject to mining and geological conditions, said filling mix can be fed to every chamber or set of chambers via wells drilled from working of overlying bed. Then, wells are plugged.

EFFECT: decreased volume of mining job, larger volumes of disposal.

3 cl, 2 dwg

FIELD: mining.

SUBSTANCE: method of working-out backfilling in flooded potassium mine involves well drilling, preparation of pulp by mixing carrying liquid and solid particles, supply of pulp through wells to flooded working-outs, and backfilling of working-outs. Drilling of injection well and well for liquid pumping-out is performed from day surface to flooded working-out meant for backfilling. Carrying liquid for pulp preparation is taken from flooded backfilled working-out on the level of its soil through the nearest well of the drilled wells. After excess pressure appears on the mouth of the injection well, pulp is supplied continuously; total supply volume of pulp solid particles to the mine through the injection well does not exceed the volume of possible liquid filtration through a sinkhole formed during flooding of potassium mine.

EFFECT: invention allows reducing the deposition of ground surface above flooded mine owing to preventing probable leaching.

1 dwg

FIELD: mining.

SUBSTANCE: primary interchamber pillars are treated only after consolidation of a filling material with rocks of interchamber pillars, formed during primary treatment of a salt bed, when subsidence of the earth surface reaches ≥90% of the value of final subsidence of the earth surface from deformation of primary chambers, determined by observations along reference lines. The secondary treatment of the bed is started from the section of its deepest submersion, at the same time flattening of a shift mould formed during its secondary treatment is carried out by transfer of a treatment border from a border of primary treatment to the distance equal to the width of a softening zone, determined depending on environmental and mining conditions of the treated section.

EFFECT: invention makes it possible to increase extraction of a mineral due to involvement of a mineral left in a mineral into treatment.

3 cl, 2 dwg

FIELD: mining industry.

SUBSTANCE: invention comprises following scheme. Oil is produced from producing wells. Potassium salts are extracted from mines and processed. Solutions are pumped into deep lying porous rock formations preliminarily revealed between oil-bearing and potassium formations. Those porous rock formations are chosen which are located below underlying stone salt. Pumping of solutions is effected through injecting wells until pressure drop in oil-bearing formation is compensated to a value sufficient to prevent deformation in potassium formations, this value being calculated using special math formula. Oil formation is then run while maintaining compensating pressure in chosen porous formation.

EFFECT: significantly reduced environmental loading and increased safety of mining operations.

3 cl, 1 dwg

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