Method of working-out backfilling in flooded potassium mine
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.
The invention relates to the mining industry and can be used when laying mines planned or emergency flooded mines.
Known way to prevent flooding, potash mines and dangerous deformations of the earth surface when breakthroughs in the mines groundwater, including drilling from the surface to the camera, submission to the camera backfill material through wells (U.S. Pat. 2341658 of the Russian Federation. The way to prevent flooding potash mines and dangerous deformations of the earth surface when breakthroughs in the mines groundwater. No. 2007123225/03; Appl. 20.06.07; publ. 20.06.08, bull. No. 17).
However, this method is time consuming and requires certain costs in the preparation of pulp for bookmarks cameras.
Closest to the proposed technical solution is the way hydrobalance flooded underground cavities, including filling flooded underground cavities by injection coarse slurries through wells from the surface (Gaidin A.M. Hydrosolate flooded underground cavities. /A.M. Gaidin.// Horn. Journe. - 2011. No. 2. - P.34-36).
The disadvantage of this method is that in the process of feeding the slurry through the borehole possible blockage of the well settled material.
The technical result of the invention is to reduce the subsidence of the surface above the flooded what Unicom due to prevent possible leaching carnallite pillars.
The technical result is achieved in that in the method of the laying of mines in the flooded potash mine, including drilling, preparing slurry by mixing the carrier liquid and solid particles, the flow of the pulp through wells in the flooded workings, bookmark workings, drilling injection wells and wells for pumping fluid produced from the surface in the flooded production intended for bookmarks, while the carrier liquid for the preparation of pulp taken from the flooded lay the output level of the soil through the nearest of the drilled wells, the flow of the pulp after the occurrence of excess pressure at the mouth of the injection wells produce continuously, the total volume of the solid feed particles of the pulp in the mine via the injection well does not exceed the amount of possible filtering the liquid through a failure funnel formed by the flooding of potash mine.
The implementation of the method is examined on the example of the technological scheme bookmarks workings carnallite emergency reservoir flooded mine Berezniki potash mine.
At the time of the flooding of the mine part of carnallite workings were neoslojnennoe. After the flooding of the mine due to the decomposition of carnallite and education additional cavities p is on these workings are expected large subsidence of the surface. Reduction of subsidence can be achieved by DataBlade flooded workings.
The essence of the method is illustrated in the drawing, which shows a General scheme bookmarks flooded workings of the mine.
In the drawing: 1 - injection well; 2 - the well for pumping fluid; 3 - put output; 4 - haul trucks; 5 - place of storage of backfill material; 6 - loader; 7 - mixer; 8 - pump; 9 - water pump; 10 - sealer; 11 - gauge; 12 - production; 13 - ventilation output, 14 - flops funnel.
The method is as follows.
On the earth's surface, over predefined areas bookmarks, equip the site preparation of the pulp. To do this, to the place of storage 5 deliver backfill material, for example, dump truck 4, where the loader 6 backfill material loaded into the mixer 7, which serves fluid.
To conduct filling operations are drilling two wells. One of them, for example, injection well 1, the mouth of which establish sealer 10, serves to supply backfill slurry, and the other bore 2 for pumping fluid. Wells are drilled so that they were put in production 3. Pumped using a submersible pump 8 fluid from the borehole 2 is fed to the mixer 7 and is used to prepare filling slurries is.
The bookmark is produced as follows.
The resulting slurry from the mixer 7 groundwater pump 9 is injected into the injection well 1.
The process control bookmarks are in terms of gauge 11, placed at the mouth of the injection wells 1.
Under the pressure of the column of pulp in the borehole to produce the tab openings 3 and 12, which are close to the injection well 1.
After the start of the supply of filling material into the injection well 1 pressure in it, on the manometer readings, missing, and then as bookmarks workings increases until, until it becomes redundant.
To ensure the efficiency of filling operations and eliminate the possibility of blockage of the bore within it the settled material after the occurrence of excess pressure at the mouth of the injection wells flow of pulp carried out continuously.
It should be noted that the pressure loss of transporting the slurry in a flooded mine is expected more than the usual tab due to the fact that the movement of the pulp by planting mines 3 and 12 is in the form of a submerged jet. Thus the fluid from the openings 12 when the tab goes to the vent production 13 and further to a failure hopper 14, through which the filtering of excess fluid.
When the pressure in the well, fixed the manometer 11, will be close to the pressure pump 8, the tab openings 3 and 12 ceased.
Potash mine is a tank with walls through which the fluid is not filtered, so by feeding the pulp into the flooded potash mine will be a rise of water in a failure funnel 14 formed by the flooding of the mine.
Since the roof of the flooded workings are mineralized water, when the lifting operation is salinization of groundwater. Therefore, when large capacity feeding the pulp will happen spout water from the collapse crater 14 on the earth's surface, which is unacceptable on environmental conditions.
To prevent salinization of groundwater hour solids in the mine limit so that it does not exceed the amount of possible filtering the liquid through a failure funnel in the range from the top of salt to the level of fresh water or the appropriate level of saline water. If the solids are greater than the possible amount of filtering will salinization of groundwater.
Water from the well for pumping fluid 2 must be made near the soil laying generation 3, which will provide the maximum content of MgCl2in the liquid and eliminate the possible leaching of pillars, for example, carnallite, and therefore, prevent the subsidence of the earth's surface.>
The proposed method allows to reduce the cost of laying cameras through the use of for making pulp of fluid from the flooded mine and reduce subsidence of the surface due to prevent possible leaching carnallite pillars.
The method of the laying of mines in the flooded potash mine, including drilling, preparing slurry by mixing the carrier liquid and solid particles, the flow of the pulp through wells in the flooded workings, the tab openings, characterized in that the drilling of injection wells and wells for pumping fluid produced from the surface in the flooded production intended for bookmarks, while the carrier liquid for the preparation of pulp taken from the flooded lay the output level of the soil through the nearest of the drilled wells, the flow of the pulp after the occurrence of excess pressure at the mouth of the injection wells produce continuously, while the total flow of solid particles of the pulp in the mine via the injection well does not exceed the amount of possible filtering the liquid through a failure funnel formed by the flooding of a potash mine.
SUBSTANCE: method includes excavation of a material from a bottomhole of an underground mine, using a continuous shearer or a longwall shearer, to develop an empty space and a mined space, supply of a foaming composition into an empty space and into a mined space and reduction of methane content measured in a tailgate at least by 0.1 wt %. Supply of the foaming composition into the empty space and into the mined space is carried out from one of the following: a machine for sight pillars excavation, a part of a continuous shearer, a part of a longwall shearer and a part of a machine for sight pillars excavation.
EFFECT: higher efficiency of mining minerals with excavation of sight pillars, mining in short and long walls.
12 cl, 11 dwg
SUBSTANCE: method includes self-flow supply of a hydraulic stowing pump to filled chambers, its stepwise pumping by pumps without jet break on a mine section of a pulp line, in emergency conditions pulp is released from self-flow and pump sections of the filling pipeline via rupture disks installed at the end of each section of the pulp line, apart from the latter.
EFFECT: lower probability of pipeline clogging in emergency situations, higher reliability of filling pipelines operation and efficiency of a filling plant.
SUBSTANCE: flushing pulp is delivered in stages forming several layers between which drain pipes are installed using leakproof hose parallel to longitudinal axis of flushed space. Drain pipes are attached by one end to leakproof hose. Each drain pipe is extended till it reaches opposite dam, then the housing is detached from drain pipe through the opening in filter dam and is removed for further use. When installation of project quantity of drain pipes is completed, process of flushing pulp delivery is resumed.
EFFECT: improving efficiency of flushing works due to reduction of flushing pulp runoff period.
SUBSTANCE: method includes supplying pulp under excessive pressure via a safety device. The safety device is arranged as a tee, one end of which is connected to a bottomhole pulp line, the second one - to a sealer, and a safety membrane is installed on the third one. At the same time the output of wells in the backfilled chamber is arranged near its roof.
EFFECT: higher extent of chambers filling with a backfilling material with reduction of labour costs.
2 cl, 7 dwg
SUBSTANCE: shaft pneumatic bridging comprises pneumatic shell, suspension unit, protective jacket, manometric and air-supply hoses, device for filling, control of excessive air pressure and its ejection, mount cord. At the same time pneumatic shell is arranged in the form of soft axisymmetric toroidal shell of rectangular section, inside of which there is sleeve arranged, and along its axis there is pipe mounted in with diametre that is less compared to sleeve. Besides pneumatic shell is separated into two equal parts by means of perforated web, upper end and its side surfaces are coated by loose-fitting meshy web with lap towards working zone of rise heading, upper end is made of synthetic high-module fibre of high strength.
EFFECT: improved operational reliability of shaft pneumatic bridging.
SUBSTANCE: method of goaf stowing during underground development of steeply dipping thick ore bodies involves bottom-upward excavation of inclined ore streaks 5 in horizontal layers up to 8 m wide with the inclination angle equal to angle of dip of ore body starting from the hanging side towards the lying side, ore breaking to the mine goaf of the bed, loading of the broken ore from the mine goaf, installation of insulating bulkheads on the bed flanks and filling of the mine goaf with hydraulic stowing mixture 2. Before the mine goaf is filled with hydraulic stowing mixture 2, there built near exposed surface of the adjacent inclined ore streak 6 is concrete retaining wall 1 with the thickness taken depending on the bed width and the specified strength of wall 1. After the rest part of the mine goaf is filled with hydraulic stowing mixture 2 and water is filtered, injection of hardening - cement-and-sand solution is performed to its upper part to the depth of 100…300 mm for movement of self-propelled machines along the filling surface 4.
EFFECT: invention will allow decreasing the flow rate of hardening stowing mixture owing to the construction of concrete retaining wall and reducing the prime cost of the mine production.
SUBSTANCE: invention refers to mining industry, and namely to the method used for hydraulic filling of long single mine workings. It involves influence of retaining and filtering connection straps, installation of pulp pipeline, and supply of filling pulp. Water is drained via drain holes made in connection straps installed on the side opposite to the pulp supply. Filling pulp is supplied to the filled area via pulp pipeline with the holes made in lower part, which is attached to the roof of mine working throughout its length. The holes made at the beginning of the pipeline are equipped with petal valves.
EFFECT: increases the filling degree of the worked-out area in hard-to-reach sections.
2 cl, 2 dwg
SUBSTANCE: invention refers to mining industry and can be implemented at underground development of steep pitched deposits represented with unstable ore, under thickness of water-flooded sediments, excavation of which is connected with hazard of underground water inrush into mine workings. The procedure of development of thick steep pitched ore bodies consists in division of ore body into layers mined in descending order, in mining layers with cuts and in filling mined space with a solidifying material. Sections of location of cavities above filled massif and sizes of these cavities are determined by visual or instrument survey from cuts mined adjoined to the filled massif. Solidifying materials are supplied to places of after-filling in adjoined cuts using, for example a concrete pump equipped with the system of control over filling mixture supply. Cavities are after-filled in a divergent order in the direction off their boundaries, from uttermost adjoined cuts to adjoined cuts.
EFFECT: increased completeness of filling mined space, decreased space of mining auxiliary entries and increased safety of mining at development of deposits.
FIELD: mining and underground building, particularly underground mining.
SUBSTANCE: method involves double-stage mineral deposit development; erecting artificial rock-and-concrete supports of previously cut primary chamber roof rock in at least two adjacent primary chambers; extracting secondary chamber resources; filling space defined by cut rock with hardening material mix. Mines for drilling and/or filling operations performing are arranged in deposit roof over or inside ore pillars of secondary chambers. Primary chamber roof rock is cut by well undercharge method. Hardening material mix is supplied via cross headings located between mine and cavities and/or via undercharged well sections remained after rock cutting operation.
EFFECT: increased safety and economical efficiency due to reduced number of drilling and filling mines or accompanying mineral excavation, possibility to use drilling and filling mines at secondary chamber development stage for ore cutting, venting and roof condition control.
5 cl, 3 dwg
FIELD: mining industry.
SUBSTANCE: device has surface composed of upper section with wedges and lower section and backfill material placed on said surface. Upper section is made in form of a rectangle, composed of rectangular triangle and rectangular trapezoid with possible displacement of trapezoid along triangle hypotenuse. Lower section is made of two plates, mounted on holder, fixed to pipe for feeding compressed air. Plate, positioned above the trapezoid, is mounted with possible counter-clockwise rotation around holder. Value of greater base of trapezoid hδ is selected from relation hδ = m - 0.9k, where m - bed massiveness, m, k - size of backfill material, m.
EFFECT: simplified construction, lower laboriousness.
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
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.
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
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
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
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
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 industry.
SUBSTANCE: backfill fibrosolution consists of concrete, argil, fibers and water, as fibers solution contains synthetic filaments with diameter 0,1-0,15 mm and length 10-20 mm in amount of 10-20 kg for 1m3 of argil-cement mixture, subjected to electrification with induction of static electric charge.
EFFECT: possible backfill of extensive fractured systems with active influx of water, increased hardness of backfill material, decreased material costs of reinforcement of fractured rocks, removal of water influxes in mines.
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