Method for strengthening of hydraulic stowage massif surfaces
SUBSTANCE: half-open course is arranged along chamber perimetre at the level of drilling crossdrift in interchamber pillars, and wooden lining is arranged in it as protruding with its dead part into stripped area of chamber. In discharge courses there are drain partitions installed, and hydraulic stowage finely dispersed material without binder is supplied through course into stripped chamber to the level of ventilation crossdrift. After drainage of water and setting of stowage massif from preserved half-open course along processed pillars there is a row of vertical and inclined wells drilled for the whole capacity of stowage massif, casing pipes are lowered from the surface of which into wells together with reinforcement rods, which protrude over the level of stowage massif. Afterwards the hardening solution is used to fill the following: at first, through wells - preserved half-open courses, then - the wells themselves, and lastly, upper part of chamber till its ceiling, which forms capping.
EFFECT: reduced consumption of binder.
The invention relates to a bookmark treatment space underground mines in chamber systems development of mineral deposits and can be used in the mining industry.
Known methods bookmarks waste space with differentiated by placing them in stowing mixtures with different content of binders (non-ferrous metallurgy Sweden. Polyakov, V.I. Makarov, S.V. and other znii and information ferrous metallurgy. Issue 15, 1984, p.18).
The bottom layer bookmarks height up to 1.5 m contains up to 20% of cement, and a layer above it - 9%. The disadvantage of this method is the high consumption of binders.
The closest technical solution is the way bookmarks exhaust chambers by feeding into the chamber filling mixtures of constant composition (Sigalov mathematical SCIENCES. Underground development of the high efficiency of extraction of ores. M.: Nedra, 1995, p.236, 238).
In the stowing mixtures of such method contains up to 400 kg ground blast-furnace slag and 40 kg of cement per 1 m3the bookmark. The disadvantage of this method, like the previous one, is the high consumption of binders, which reduces its technological capabilities.
The aim of the present invention is to improve the technological capabilities of methods hydrobalance exhaust chambers fine material.
The essence of the invention is illustrated by drawings, where figure 1 shows a longitudinal section of the camera, filled to the level of ventilation ORT backfill fine material without binder, with drilled vertical and horizontal wells from the stored semi-open excavations; figure 2 - cross section of a camera with development, through which served hardening filling material stored in the floor is the open generation, in wells in the upper part of the chamber before it PetroChina; figure 3 shows the site of penetration in mezhdurebernyh the pillars semi-open excavations; figure 4 shows a cross-section structure in a semi-open developing deaf timbering, serving in the mined-out area; figure 5 is a view saved after hydrobalance semi generation, from which wells have been drilled on all power drained backfill array.
Surface strengthening hydrosilation arrays is as follows.
Along the perimeter of the waste chamber 1 at the level of the drilling ORT 2 mezhdurebernyh the 3 pillars traversed half-open output 4, which is constructed wooden shield 5, the protruding hollow part 6 in a goaf camera 1. In the exhaust openings are installed drainage jumpers 7 and through the production of 8 old camera 1 is supplied to the level ventilation ORT 9 hydrosalinity fine material without binder.
After drainage of water and shrinkage of filling the array from the stored semi generation 4 working along pillar drilling the number of vertical and inclined wells 10 at full capacity filling array with the surface in which the well is lower casing 11 and the reinforcing rods 12, above the level of filling of the array, then tverdeli the solution fill: first, through well preserved semi generation 4, and then themselves well 10 and at least the upper part of the chamber before it PetroChina, forming the Foundation 13.
Thus, a single structural system, consisting of a pile Foundation, concrete wells-piles and concrete semi-open workings, encircling filling the array, creates a solid, stable surface capable of when developing mezhdurebernyh pillars to withstand not only the vertical pressure of overlapping species, but the side explosive shock waves. The basic weight gidrogelatorov array located within the generated structural system does not contain a binder, and achieved significant savings.
The method of hardening surfaces hydrosilation arrays, including the filing of filling materials with different content of a binder, characterized in that before hydrosoluble camera to the level of ventilation ORT fine material without binding are at the level of the drilling ORT in mezhdurebernyh the pillars around the perimeter of the waste chamber semi generation that invented the protruding hollow part in a goaf wooden posts, and erected in the outlet openings of the drainage of the bridge, and after drainage of water and shrinkage of filling array of Sokh what Anenii semi develop along the working pillar drilling the number of vertical and inclined wells at full capacity backfill array with the surface in which the well is lowered casing and reinforcing bars is greater than the level of filling of the array, and then fill the hardening solution: first, through the well - preserved half-open output, then themselves well and at least the upper part of the chamber before it PetroChina.
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 and can be implemented at coal mines during development edge and steeply pitching beds of coal by hydro-cutting. The procedure consists in exposing extraction field, in dividing it to extraction blocks, in leaving inter-block coal solids, in exposing extraction blocks with ventilation and accumulating crosscuts, in driving load handling slopes, ventilation furnaces and pulp furnaces, in dividing extraction blocks to stories, in driving story extraction drifts, and in mining stories of extraction blocks with a system of story hydro-cutting by passes along strike from story extraction drifts and facilitating rock falling in stripped area. Mining of stories is performed in a descending order. Exposure of extraction field is carried out at flanks with ventilation and accumulating crosscuts wherefrom coal is extracted from solids with the system of extraction; also stripped area is stowed with non-combustible fill; the solid functions as a protection for crosscuts forming a barrier solid. Block mining within ranges of an extraction pillar is performed successively starting from a mining block adjoining the formed barrier solid. Along the whole length of the extracting pillar inter-block coal solids are mined together with stories of adjacent mined extraction blocks.
EFFECT: increased safety of miners labour due to elimination of endogenous fires and increased efficiency owing to extraction of inter-block coal solids.
FIELD: oil-and-gas production.
SUBSTANCE: stowing mixture contains, wt %: halite wastes of reprocessing of potassic ores 96.5-98.3, bonding agent - magnesia cement 1-2, lignosulfonate 0.7-1.5%.
EFFECT: achievement of required strength of backfilling at minimal content of bonding agent.
1 tbl, 1 dwg
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 is related to mining industry, namely to method for preparation of stowing mix. Tails of dressing works are sent to several stowing complexes with application of hydraulic transport system, comprising working and drain branches. Tails are separated in each stowing complex into condensed product sent for preparation of stowing mix and lightened discharge. Working and drain branches of hydraulic transport system are separated. Tails from working branch are sent to each stowing complex, and lightened discharge is drained to drain branch. End part of working branch and beginning of drain branch in hydraulic transport system are joined by emergency bridge comprising stop valves. Each stowing complex newly added to system of hydraulic transport is duplicated with emergency bridge. System of hydraulic transport includes several separated working and drain branches, which service groups of stowing complexes that vary in number. Working and drain branches of hydraulic transport system for sending of tails to several groups of stowing complexes may be combined into headers.
EFFECT: provision of stable high quality of mines stowing, increased efficiency and safety of mining works, lower costs for preparation of stowing mix and transportation of dressing works tails in servicing of several mines.
7 cl, 8 dwg, 1 ex
SUBSTANCE: invention refers to mining engineering and can be used during underground development of mineral deposits. Erection method of filling connection strap involves making of rock dike by laying as to width and height of the filling working of large rock pieces 1, on which there put is layer of finer rock or sand 2 with drain pipe 3 passed through rock dike. On rock dike there installed are pneumocylinders 4, which are forced outwards, between rock dike and roof of working by supplying to pneumocylinders 4 of compressed air with outward pressure which is more than limit value, at decrease of which pneumocylinders 4 are forced with backfill material 5 to the side of non-filled part of the working. Distance between rock dike and roof of working is determined by the ratio: amin<h<0.75amax, where: amin - minimum height of pneumocylinder 4 when in folded position till compressed air is supplied to it; h - distance between rock dike and roof of working; amax - size of pneumocylinder 4 after compressed air has been supplied to it.
EFFECT: increasing efficiency of filling operations.
1 cl, 1 dwg
SUBSTANCE: invention is related to mining industry, namely to hardening fill mixtures. It includes filler, liquid sodium glass, gypsum, cement. Fill mixture is additionally supplemented with flocculant and martite-hematite iron ore, with the following ratio of mixture components: liquid sodium glass 20-22%; cement 1-2%; gypsum 1-2%; flocculant 0.002-0.004%; martite-hematite iron ore 1%; filler - the rest.
EFFECT: improved quality of technological properties of hardening fill mixture, reduced prime cost, increased bearing capacity of filled mass, reduced consumption of hardening solution and simplified technology of stripped area filling.
2 cl, 1 tbl
SUBSTANCE: invention refers to mineral resource industry, namely to methods of protection of workings mainly at great depths and flat gradient of thick deposits in worked-out filling area and may be used during selective mining of thick deposits of highly valuable ore minerals. Method includes formation of secondary local zone of unloading by rock pressure in filling mass of worked-out area by means of balance bags and their filling with flexible material. Balance bags are performed during formation of filling mass in area of next working-out and as a flexible material layer of consolidating stowing is used which flexibility is enhanced as compared to the other layers.
EFFECT: improving of stability of workings formed in consolidating stowing mass.
7 cl, 4 dwg
SUBSTANCE: invention is related to the field of mining, namely, to travelling bulkheads for arrangement of filling mass in underground mine openings. It includes metal pressure shield, which consists of separate elements fixed to each other by means of bolts, soft shells, equipped with nozzles for supply and exhaust of compressed air, pipes for drainage with filters and pipes for sampling with plug. Metal pressure shield is arranged in the form of right-angled parallelepiped, which is made of four triangular fixed prisms, bases of which have the shape of isosceles right-angled triangle. Height of triangular prisms is accepted as higher than distance between roof of filled opening and metal pressure shield, in which door opening with door is installed, and door opens in direction of filling mass location. On upper and lateral sides of metal shield, there are soft shells arranged, height of which, when completely filled with compressed air, exceeds distance between metal pressure shield and contour of opening section. On the lower side metal pressure shield is equipped with rubberised apron on the side of filling mass.
EFFECT: invention makes it possible to increase efficiency and reliability of filling mass control in filling of lengthy mine openings and layer excavation of mineral.
SUBSTANCE: development method of lodes by layers with backfilling includes driving of preparatory-temporary workings 1, excavation of ore by diagonal layers 3, breaking by explosive blast holes into open area of layer, shipping of ore and filling of open area of layer by backfilling. Angle of slope of diagonal layer 3 is accepted equal to minimal limit angle, overcoming by self-propelled equipment. Backfilling is implemented up to designed taking-out capacity of lode by undermined rocks of bottom layer and/or granulated laying mixture from mill tailing.
EFFECT: effectiveness increase of development, cost cutting for development of lodes, losses of minerals and anthropogenic load to environment.
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 erection of rows of main platforms along bed length in staggered order with length equal or divisible by step value for support displacement, and placing filling material thereon. Along length of main platforms between ceiling and bed soil post support is mounted, upon which filling material is fed. After that between main platforms additional platforms are erected with wedge supporting, and main platforms are rotated counter-clockwise towards pneumatic support and it is displaced for one drive step. During that filling material, while lowering, unwedges wedge support between ceiling and bed soil and forms artificial supports. After that additional platforms are rotated counter-clockwise towards pneumatic support. After movement of cleaning face for two drive steps operations for constructing artificial supports are repeated. Distance between main platforms along bed fall line are selected from mathematical expression.
EFFECT: higher efficiency.
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.
FIELD: mining industry.
SUBSTANCE: method includes extraction of deposit resources by chambers through one of them, construction of ice-rock backfill in extracted space of primary chambers and following extraction of inter-chamber blocks. In inter-chamber blocks wedge-shaped slits are formed immediately in ceiling of deposit, space of slits is filled with ice-rock backfill, while slits are formed of inter-chamber blocks for 1/3 of width.
EFFECT: higher durability, higher effectiveness.
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.
FIELD: mining industry, particularly to develop mineral deposit along with backfilling of worked-out areas.
SUBSTANCE: backfill mix comprises cement, grinded granulated blastfurnace slag, filler and water. The backfill mix additionally has shredded straw. Grinded diabase is used as the filler. All above components are taken in the following amounts (% by weight): cement - 2.9-5.07, grinded granulated blastfurnace slag - 15.21-16.91, grinded diabase - 52.24-53.22, shredded straw - 0.02-0.076, water - remainder.
EFFECT: increased strength and crack-resistance.
FIELD: mining industry.
SUBSTANCE: invention is designed for use in development of minerals with systems involving filling mined-out space with solidifying stowing mix. The latter is composed of broken lime-containing binder in the form of active aluminosilicate material (5.6-33.2%) and fired carbonate rocks (1.0-16.7%), tempering water with phlegmatizer (10.6-27.5%), and filler. Carbonate rocks are fired at 900-1200°C, contain active calcium-magnesium oxides CaO+MgO at least 40% and not more than 9.1% based on the total weight of mix, which are broken to screen residue 0.08 mm not more than 15%. Active aluminosilicate material is fired marl or fired clay, or fired kimberlite ore concentration tails, or granulated blast furnace slag. Tempering water contains phlegmatizer in amounts found from formula [Ph] = (0.005-0.021)*Cr/Cw, where [Ph] amount of water in 1 L tempering water, kg; (0.005-0.021) coefficient taking into account proportion between phlegmatizer and fired carbonate rocks in mix; Cr amount of carbonate rocks in mix, kg; and Cw experimentally found consumption of tempering water with mix, L. When indicated amount of CaO+MgO in mixture is exceeded, CaO and MgO are converted into hydroxides by spraying with water in amount not higher than 20% of the weight of fired carbonate rocks (on conversion to active CaO+MgO). As carbonate rocks, host rocks of kimberlite deposits are used; as filler, sand and/or concentration tails, and/or broken aluminosilicate rock; and, as phlegmatizer, industrial-grade lignosulfonate or superplasticizer.
EFFECT: improved workability of mix and reduced cost.
5 cl, 4 dwg, 3 tbl
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, particularly underground mineral mining with excavated space filling with hardening filling mix.
SUBSTANCE: method involves mixing grinded lime-containing binding agent, mixing water and filler; delivering the filling mix to area to be filled; filling mine space with the filling mix in several layers. The lime-containing binding agent is active silica-alumina material and burnt carbonate rock including at least 40% of active Cao+MgO. Above rock is grinded so that not more than 15% of grinded material remains on sieve having 0.08 orifice dimensions. Amount of the grinded burnt carbonate rock is selected so that active Cao+MgO is not more than 9.1% of filling mix mass. Water consumption for oxide Ca and Mg conversion in hydroxide is not more than 20% of burnt carbonate rock recalculated to active CaO+MgO. Retarder is added in mixing water in amount determined from R=(0.005-0.021)-Cr/Cw, where R is retarder content in 1 l of mixing water, kg; (0.005-0.021) is factor, which considers retarder-burnt carbonate rock ratio in the filling mix; Cr is burnt carbonate rock content in filling mix, kg; Cw is experimentally determined mixing water content in filling mix, l. Mine space filling rate is chosen from hardening time and self-heating degree of filing mass. The filling mix contains active silica-alumina material in amount of 5.6-33.2% by weight, carbonate rock burnt at 900-1200°C and containing active CaO+MgO of not less than 40% in amount of 1.0-16.7%, mixing water with retarder in amount of 10.6-27.5%, remainder is filler.
EFFECT: increased operational safety due to improved quality mine space filling, reduced costs and increased mine intensity.
6 cl, 4 tbl, 5 dwg
FIELD: mining, particularly to develop valuable mineral deposits along with goaf filling.
SUBSTANCE: fill mix comprises quick lime, grinded blast furnace slag, filler, industrial lignosulphonate and water. The fill mix additionally comprises trisodiumphosphate. All above components are taken in the following amounts (% by weight): quick lime - 1.61-4.8, grinded blast furnace slag - 10.79-14.4, filler - 60.85-62.14, industrial lignosulphonate - 0.016-0.11, trisodiumphosphate - 0.124-0.35, remainder is water.
EFFECT: increased strength and crack-resistance of fill mix over the full fill body.