Method for installation of flexible covering
SUBSTANCE: invention concerns mining and can be used in mining ore bodies under protection of flexible covering. The method involves creating niches in the ore body, making down holes at the level of ore occurrence up to the lowest mark of a block, placing guideways and lag ropes, fastening them in the upper part. The method further involves boring a fan in the top wall of the ore body, in a parallel plane to occurrence of an ore body. On one charged fan of holes located in the centre against other fans, two single fans After loading the holes with explosive and detonations release of muck pile is performed. Further on, winches are mounted in the top niches, attaching lag cables, then the directing cables in the conduit are pull and used together with lag cables for stretching flexible cover in an upward direction. After stretching the covering is fixed in the top part of the block performing workout of stocks of the block.
EFFECT: increased productivity of the block during second mining, decreased labour iousness of flexible covering installation and decreased impoverishment while mining chamber stocks.
The invention relates to mining and can be used at the ore bodies under the protection of the flexible beams.
The known method of mounting a flexible cover under the overhanging tab (RF patent No. 2019714, E21F 15/00, publ. 1994.09.15). Flexible overlay form of the even and odd lines are laid along the strike of the formation, and the transverse strips are laid on the dip, rolling mesh rolls. Thus, for example, first the even-numbered strip is rolled on the width of the transverse strips ahead from the odd bands, and placed on top of them cross the line. Then roll an odd band ahead of even strips the width of the transverse strips, placed on top of the transverse strip, etc. In the mesh strips are laid in trouble. The disadvantage of this method is to narrow the scope.
Known way to move the rock mass in the chamber during the development of ore adopted for the prototype (A.S. USSR №1786882, AS 41/22, publ. 1999.09.20). The method includes the sinking of slash-and-burn drift, breaking and magazynowania mineral between the rocks hanging and lying laterally, the collapse of PetroChina block and General release of minerals under the flexible separating overlapping with the guide elements. The method is characterized by the fact that the guiding elements crepe is in shifting the roadway and as layer blasting mineral hang on hanging and lying laterally across the working height of the block to the level of PetroChina, at this level guiding elements are passed through the flexible edge of the overlapping side of the rocks and fix, and with the release of mineral guiding elements hold the hanging and lying laterally tamakaimoana minerals and collapsing wall-rocks. The disadvantage of this method is the low performance of the block associated with the need to magazynowania ore in the block and reducing the complexity of installation of flexible beams.
The technical result of this method is the increased productivity of the unit and reducing the complexity of installation of flexible beams.
The technical result is achieved in that in the method of mounting flexible floors, including the sinking of the preparatory and development workings, the installation of flexible overlay in the hanging side of the ore body using the guide elements, the breakage and the release of broken ore from the block through production release under separating the flexible overlay according to the invention after working driving issue in the corners of the block creates a niche in the thickness of the ore body across his stretch, Buryats of them descending wells in the plane of the occurrence of the ore body to the lower level unit, place them in the guides and long cables with their fastening at the top, then Buryats fan of them sets of wells in the hanging wall the side of the ore body, parallel to the plane of the occurrence of the ore body, and on one charge hole fan, located in the center relative to the rest of the fans, Buryats two idle fan of wells, after loading wells explosive and blasting make the release of broken ore, then in the upper niches mount a winch to which attached long ropes, and then guides the cables in the development release pull, and using long cables begin to stretch the flexible overlay in the upward direction, and after pulling overlap it is fixed in the upper part of the block and make the mining of the reserves of the block.
The application of the proposed method in comparison with the prototype allows to increase the capacity and reduce the complexity of mounting the flexible beams.
The method of mounting flexible overlap is illustrated by drawings, figure 1 shows a vertical section along the line b-B, figure 2 shows a horizontal section along the line A-a in figure 3 shows a section along the line C-C, figure 4 shows a vertical section along the line b-B (the step of mounting the flexible overlap), figure 5 shows a vertical section along the line b-B (phase sewage extraction), where
1 - steep ore body;
2 - niches created at the corners of the unit capacity of the ore body 1 across its stretch;
3 - rechargeable fan of wells, is the s-center relative to the rest of the fans wells;
4 - idle fan of wells;
5 - trench extended from the trench drift;
6 is an inclined exit;
7 loading races;
8 - haul drift;
9 - vent drift;
10 - linkage of the inclined junction 6 with the drill drift 11;
11 - drill drift;
12 - guide cables;
13 - blastholes for blasting inventory block;
14 - long cables;
15 is a flexible overlay in the coil;
16 - hoist associated with lingering cables 14;
hnl- height of the block, m;
Lnl- block length, m;
m - power orebody 1;
α - the angle of incidence of the ore body, expected.
The method of mounting the flexible overlay is as follows. Steep ore body 1 prepare the necessary preparatory and rifled workings. Pass delivery passage 8, the loading race 7, which is a trench roadway, expanding into the trench 5. A delivery passage 8 are inclined at exit 6, knocks vent passage 9 of the overlying horizon. Of the inclined exit 6 are linkage 10 with the drill drift 11. Also a delivery passage 8 through the corners of the block power m ore body 1 across its stretch (up to the hanging side of the ore body 1), which is limited to Lnl- length of the block and the block height of hnl, 2 niches. Of NIS 2 Buryat descending wells in the plane for which ahania ore body to the lower level unit and place them in the guides 12 and broaching 14 cables by attaching them at the top, for example, using anchors. Also from NIS 2 Buryat ascending and descending fans wells, respectively rechargeable 3 and idle the fan 4. Fans of wells 3 and 4 are drilling parallel to the plane of the occurrence of the ore body in accordance with its angle of incidence α in the immediate vicinity of the hanging side of the ore body 1. One rechargeable fan of 3 wells located in the center relative to the rest of the fans wells, drilling two idle fan 4 wells. Idle fan 4 are intended to compensate for the increase of broken ore from loosening when the rotating drum and prevent it hangs at release. After drilling rechargeable 3 blank 4 fans wells parallel to the plane of the occurrence of the ore body 1 along strike in accordance with the passport blasting, built by one of the known methods, carry out the loading of the explosive (pellet or cartridge) and the blasting charge of the fan 3. Then make the release of broken ore through the trench 5. The issue are as follows. For example, load-haul-machine (in the drawing conventionally not shown) enters the trench 5 through loading in 7, scoops up the loosened ore and transporting it at the delivery passage 8 to the nearest ore passes (in the drawing conventionally not shown). After the release of broken ore formed in shell is placed a flexible overlay in the following sequence. In the upper niches of the 2 block is mounted winch 16, which is attached long ropes 14. After that guides the cables 12 in the development release pull, for example, by using secure their cargo. Then using long cables 14 start to mount and stretch the flexible overlay 15 in the roll in the upward direction. Feeding the flexible overlay in the upward direction along the guide wires 12 will virtually eliminate the possibility of flexible overlapping while drawing and installation. Through the use of pulling winches 16 significantly reduces the complexity of installation. After pulling overlap it is fixed in the upper part of the block and make the mining of the reserves of the block. For example, in the center of the block or from one of its edges are cut-rising, expanding in cutting the slot (on the drawing conventionally not shown). Then amerivault in accordance with the passport blasting blasting hole 13 for the conditions of the stock block, explode them, air unit and produce ore from the block through the trench 5 under the protection of the flexible beams. When unstable rocks of the hanging block possible partial magazynowania ore in the unit during the period of sewage extraction to prevent rupture of the flexible beams.
The application of the proposed method of mounting flexible slab provides the following the respective advantages:
- improving the performance of the unit during the period of sewage extraction;
- reducing the complexity of the operations for mounting the flexible overlay;
- reduction of dilution when developing chamber stocks.
The method of mounting flexible floors, including the sinking of the preparatory and development workings, the installation of flexible overlay in the hanging side of the ore body using the guide elements, the breakage and the release of broken ore from the block through production release under flexible separating overlapping, characterized in that after working driving issue in the corners of the block creates a niche in the thickness of the ore body across his stretch, Buryats of them descending wells in the plane of the occurrence of the ore body to the lower level unit, place them in the guides and long cables with their fastening at the top, then the Buryats of these fan kits wells in the hanging side of the ore body, parallel to the plane of the occurrence of the ore body, and on one charge hole fan, located in the center relative to the rest of the fans, Buryats two idle fan of wells, after loading wells explosive and blasting make the release of broken ore, then in the upper niches mount a winch to which attached long ropes, and then guides the cables in the development release and pull on them is by using long ropes begin to stretch the flexible overlay in the upward direction, and after pulling overlap it is fixed in the upper part of the block and make the mining of the reserves of the block.
FIELD: mining industry.
SUBSTANCE: present invention relates to mining and may be used for mining steep seams using the hydraulic method, with mined-out space filling. A controllable shield roof for mining steep seams with mined-out space filling includes hoists, jacks, a receiving device, cables, on which pipe pieces with lugs for the attachment of metallic plates are installed; a water-protection element, and "aprons". The shield roof cables are located in the centre, as well as at the roof and floor of the seam, and strengthened by jacks. Metallic plates are pivotally connected to the cables, a water-protection element and "aprons" being attached above the plates at the seam roof and floor sides.
EFFECT: efficient working of steep seams, decreased water-protection element mounting and dismantling work, reliable insulation of mined-out space.
SUBSTANCE: invention concerns mining, namely temporary safety linings for galleries. Temporary safety lining for galleries includes canopy, its supports, installation modules and mounting units. The canopy itself consists of a set of uniform-sized sections with mounting units on the supports. A mounting unit is mounting base with guide pipe, which has a support lock inside it and a reinforcement plate welded along the pipe and featuring a lug and holes for support pins of the mounting unit, with a possibility for changing the tilt angle in the mounting module in the direction of pit-face. A mounting module is a lug formed by two plates with holes for support pins and mounting units fixing it to the permanent lining.
EFFECT: simplification of temporary safety lining construction, reduction of time and labour capacity necessary for its manufacturing and installation, operational safety.
FIELD: mining industry.
SUBSTANCE: method is based on positioning of current-conductive reflecting elements on surface of flexible separating ceiling and determining of position of flexible separating ceiling on basis of position of current-conductive reflecting elements by pulse radio-location from mine above cleaning pit. Current-conductive reflective elements are made in form of set of elements, forming a solid reflecting surface or system of reflecting elements, being a complex target. It is possible to use, as current conductive reflective element, metallic shavings, and also portions of metallic pipes or stripes or angles, welded cross-like. It is possible to use solid metallic mesh or its portions. Metallic set can be coated.
EFFECT: higher precision.
FIELD: mining industry.
SUBSTANCE: method includes erection of pack strips from rock with width 2-3 meters with spaces between them 2.5-5.0 meters. On pack strips pneumatic tanks are mounted. Minimal width of pack strips is taken greater than pneumatic tank width, and height of pack strips is determined from expression h≥m-a-εlim (meters), where h - height of pack strip, meters; m - bed massiveness, meters; a - maximal height of pneumatic tank in working state; εlim - maximal allowed value of free lowering of ceiling rocks above pack strip with pneumatic tanks, meters.
EFFECT: lower laboriousness, lower costs.
FIELD: mining industry.
SUBSTANCE: present invention relates to the field mining using thermal fragmentation for the extraction of ore from narrow veins. The method of ore extraction from a vein with opposite side walls involves drilling of pilot holes in the vein directly, with certain pitch along the vein, reaming of the pilot holes by thermal fragmentation until the vein is fragmented, and removal of fragmented ore along the vein. The pitch is determined by the vein width. Along a part of the vein, the pilot holes are reamed gradually according to the given configuration, each second pilot hole is reamed in a greater degree, for its connection to the opposite adjacent pilot holes reamed earlier. The pilot holes are drilled and reamed in a given sequence, starting from drilling of the first group of three pilot holes, the first and third holes from the first group are reamed before reaming the second hole from this group. After the first group of holes, a group of two holes is drilled, the second hole from the second group being reamed before reaming the first hole from the second group. Fragmented ore is removed by suction.
EFFECT: profitable mining of narrow ore veins.
7 cl, 6 dwg
SUBSTANCE: method includes the subterranean development of field with use of the chamber systems with the solid stowing and following refinement of the ore mass at the ore mill in the following stages. At the beginning, the ore recovering from the first-stage chamber (4) is performed. The ore pickings from the first-stage chamber (4) are processed to concentrate and final tailings. The tailings are processed to pellets. From the pellets, two workflows are formed, the first pellet flow is exposed to the heap leaching, and the second pellet flow is conditioned until the required mechanical characteristics. On completion of the leaching process, the pellets of the first workflow are mixed with binding agent and water, to receive the fill mixture, the fill mixture is sent to the first-stage chambers (4) until filling; after the fill mixture is solidified, the ore recovering from the second-stage chamber (5) is performed, the chamber's bottom is strengthened and prepared with the solidifying mixture which is prepared using the waste from the heap leaching; pellets of the second workflow are sent to the chamber with their following subterranean leaching.
EFFECT: comprehensive and complex development of minerals and ecologic-economic effects are provided.
4 cl, 1 dwg
FIELD: mining engineering.
SUBSTANCE: working method includes drifting of preparatory breakoffs, slicing of stope inclined strips, inclined according to sloping angle of ore body, beginning with hanging layer directed to bottom wall, ore breaking with explosive holes. Breakage, transportation and formation releasing from rocky bands in ore body are carried out separately through the flanking debris chute. Previous slice after corresponding preparation is filled with weak solid stowing, which provides hardiness of its walls, at that interblock pillars are eliminated with leaving of free technological space between ore mining face roof and horizontal surface of previous slice filling mass. At first one excavates low layer of the block with entry ways at whole its length, fills worked entry ways with hard solidifying mixture in particular order with preliminary armature setting up, so that after the complete excavation of the layer in-situ concrete slab is appeared. It performs the functions of ceiling while debugging of underlying block reservoir.
EFFECT: effectiveness improvement of ore excavation and safety of stopes working.
FIELD: mining industry.
SUBSTANCE: said method implies development and temporary drifting, horizon reserves hole drilling down to pillar bottom, hole 13 charging and blasting, loading of dumped ore from the block through loading workings 5. After loading workings drifting, stables 2 are worked out in the block corners, cutting across thickness of the ore body, fanned ring is drilled in the ore body hanger in parallel to the ore body bed. Per single charged fan, which is central as regards to other fans, four empty fans are drilled, after charging and blowing dumped ore is loaded, and then canopy 12 is created in the ore body hanger by stowing the resulting space with consolidating stowing material. After consolidation, block reserves are processed under canopy 12 protection, thickness h of the canopy being determined according to formula: h = L2ρ"P"/2000σ"R")sinα, where L - block slip, m; ρ"P" - canopy material density, kg/m3; σ"R"- canopy material tensile strength, MPa; α - ore body slope angle, degrees.
EFFECT: said invention provides for less labour intensity and improved output of stoping.
FIELD: mining, particularly underground thick ore body mining with chamber excavation system with goaf filling at large depths in the case of elevated rock pressure.
SUBSTANCE: method involves cutting unloading slot (slot raise) along ore body strike and before chamber stock excavation initiation in massifs of chambers of the first, the second and the third stages; filling the unloading slot with shrinkage ore; connecting unloading slot ends with cleavage cracks in different stages, wherein the cleavage cracks are formed by drilling wells of 100-112 mm diameters spaced apart 1-1,2 m apart along stage boundaries between sublevels so that each second well is blasted. As lying wall and hanging wall converge ore massifs of the first, the second and the third stages are shifted and slide one relatively another along with partial pillar breakage in unloading slots. To block filling material penetration through slot raise excavations passing through pillars, concrete bridges are erected in the slots. After than chambers of the first stage are cut and filled. After drilled cross-drift cutting the second and the third stage massifs are broken on previously driven slot raises.
EFFECT: increased mining safety and filler, improved stability of the first, the second and the third stage ore massifs, as well as contact massifs of lying and hanging walls.
FIELD: mining, particularly underground deposit mining.
SUBSTANCE: method involves separating mining level into chambers arranged in staggered order, wherein chambers of each lower level are shifted with respect to ones of upper level for half of chamber width; preparing each mining level and sublevel by lateral drift excavation; forming inclines and cross-drifts to hanging wall of deposit; developing rises from cross-drifts of mining level, which are converted into slot raises; cutting chamber stock to open face. Mining levels are separated into chambers without safety pillar leaving. The chambers are shaped as hexahedrons. Ceilings are fully removed from mining level cross-drifts and are filled with filler. To cut chamber stocks ore level and sublevel drifts are created at lying walls. Inclines are cut from ore sublevel drift so that inclines extend between chambers. Fan-like wells are drilled from ore drifts and mining level stocks are blasted. Ore is drawn from each chamber to slot raise through incline ends in mining level and sublevel.
EFFECT: increased ore deposit thickness, decreased stock preparation and cutting time, as well as reduced mining costs.
FIELD: mining, particularly methods of underground mining.
SUBSTANCE: method for ore body having low and medium thickness development by mine sections involves preparing, cutting and drilling wells from drilling rooms; charging wells with explosive and blasting thereof; drawing ore from blocks and supporting goof. As mine section stock is excavated breakage heading line is advanced in several sections along ore body propagation line. Drilling rooms extend along maximal ore body shape variation line. Ore in section is cut in several layers transversal to longitudinal drilling room axis. Said layers have constant dimensions measured in direction of maximal ore body shape variation line. Layer dimensions in direction of maximal ore body shape variation line are divisible by line of least resistance. Layers have variable dimensions in direction of minimal ore body shape variation line and are determined to provide completeness of curvilinear ore body area cutting with linear stopping zone section.
EFFECT: increased labor productivity and mechanization degree due to improved self-moving or monorail drilling rig usage.
5 cl, 22 dwg
FIELD: mining, particularly underground thick deposit development by room-and-pillar method, namely for uprise forming.
SUBSTANCE: method involves making uprise; forming horizontal entry in ore pass; isolating ore pass from goaf and filling goaf with dry filler. Uprise is made from ready entry of layer to be cut for 2-3 m height. Ore pass isolation is performed by removable metal form installation. After that entry space up to form is filled with rubble concrete.
EFFECT: decreased costs for ore production due to decreased ore making costs and lining thereof during goaf filling along with increased strength of ore pass entry.
2 cl, 6 dwg
FIELD: mining, particularly underground flat ore body mining.
SUBSTANCE: method involves cutting development-and-face entries; forming lava undercutting and ore ledge; excavating ore in lava undercutting and ore ledge in several layers; unloading cut ore on lava undercutting surface and transporting thereof. Lava undercutting is provided with powered support sections. Ore is cut from lava undercutting in several layers having widths divisible by powered support section advance increment. Ore ledge is cut in several layers. Each layer has width not exceeding that of technically specified loader bucket entry in goaf. Cut ore is distributed and conveyed along lava undercutting length under power support section protection. Forced seating of overlaying rock from drilling-and-seating entries drilled along upper ore bed contact is carried out with pitch divisible by ore ledge layer width to be cut.
EFFECT: decreased cut ore losses and dilution with overlaying rock, increased safety and labor productivity.
4 cl, 1 ex
FIELD: mining, particularly to develop steep ore deposits in upward order.
SUBSTANCE: method involves sinking hauling entry of overlaying level, field incline, drive connecting hauling entry with chamber, sub level field entry, drive communicated with drill drift and ore drill drift; drilling well ring to upper overlaying chamber undermining mark; cutting ore; discharging and unloading cut ore; filling chamber goaf with pourable rock filler, wherein the rock filler is supplied directly from drives in chamber from hauling entry of overlaying level and rock filler is distributed over chamber area and compacted with the use of earth-moving machinery to create flat bottom.
EFFECT: decreased ore costs and volume of work in block, decreased ore losses due to total ore loading and block bottom cleaning with casing packer with remote control.
FIELD: mining industry.
SUBSTANCE: method includes conditional separation of levels on chambers, which are made in form of stretched upwards hexahedron and placed in staggered order, at each lower level with displacement for half of chamber width in comparison to upper one. Preparation of each lower level is performed by driving field drift of main level, from which entries to ore deposit and orts to hanging side of deposit are driven, from orts ascending drifts are made and cut with cutting slits. For extraction of field resources a field sub-level drift is driven, entries and ore sub-level drift near lying side, from where orts are driven, from drift well fans are drilled and main resources of level are exploded through cutting slit. Outlet of ore from each chamber is performed through ends of outlet mines in main and intermediate levels. After removing main resources inter-level block is destroyed and ore from it is removed through entries of main level.
EFFECT: higher efficiency.