AU2009321259A1 - Continuous mining - Google Patents
Continuous mining Download PDFInfo
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- AU2009321259A1 AU2009321259A1 AU2009321259A AU2009321259A AU2009321259A1 AU 2009321259 A1 AU2009321259 A1 AU 2009321259A1 AU 2009321259 A AU2009321259 A AU 2009321259A AU 2009321259 A AU2009321259 A AU 2009321259A AU 2009321259 A1 AU2009321259 A1 AU 2009321259A1
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- Australia
- Prior art keywords
- extraction
- drifts
- method useful
- continuous
- haulage
- Prior art date
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- 238000005065 mining Methods 0.000 title claims description 21
- 238000000605 extraction Methods 0.000 claims abstract description 60
- 238000000034 method Methods 0.000 claims abstract description 46
- 238000010276 construction Methods 0.000 claims abstract description 10
- 230000003750 conditioning effect Effects 0.000 claims abstract description 9
- 238000004519 manufacturing process Methods 0.000 claims abstract description 5
- 230000002452 interceptive effect Effects 0.000 claims abstract description 4
- 239000011435 rock Substances 0.000 claims description 33
- 239000000463 material Substances 0.000 claims description 19
- 239000012634 fragment Substances 0.000 claims description 6
- 238000011065 in-situ storage Methods 0.000 claims description 5
- 239000002360 explosive Substances 0.000 claims description 4
- 230000003313 weakening effect Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 2
- 238000009825 accumulation Methods 0.000 claims 1
- 230000008569 process Effects 0.000 description 15
- 238000013467 fragmentation Methods 0.000 description 8
- 238000006062 fragmentation reaction Methods 0.000 description 8
- 238000012423 maintenance Methods 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005474 detonation Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003129 oil well Substances 0.000 description 2
- 230000000638 stimulation Effects 0.000 description 2
- 238000005422 blasting Methods 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 239000000109 continuous material Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000001033 granulometry Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000002203 pretreatment Methods 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 210000003462 vein Anatomy 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
- E21C41/22—Methods of underground mining; Layouts therefor for ores, e.g. mining placers
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21C—MINING OR QUARRYING
- E21C41/00—Methods of underground or surface mining; Layouts therefor
- E21C41/16—Methods of underground mining; Layouts therefor
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
- E21B43/25—Methods for stimulating production
- E21B43/26—Methods for stimulating production by forming crevices or fractures
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/04—Transport of mined material in gravity inclines; in staple or inclined shafts
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F13/00—Transport specially adapted to underground conditions
- E21F13/06—Transport of mined material at or adjacent to the working face
- E21F13/066—Scraper chain conveyors
Abstract
A method useful in the continuous ore extraction in underground works intended for the permanent production of extraction from draw points or trenches, comprising the construction of reduced size drifts (4) wherein through the center defined by a group of drifts crosses a drift (2) which is intended for ore haulage, such drift crosses successively all drift groups defined at the exploitation face,- such extraction points (11) are arranged to form a regular layout [m4] at certain distances which are compatible with an interactive gravitational flow; once such drifts, trenches and haulage drifts are constructed the pre-conditioning, caving and extraction stages are carried out.
Description
WO 2010/061274 PCT/IB2009/007556 1 CONTINUOUS MINING The present application for invention patent relates to a method of underground mining exploitation which allows for continuous ore extraction. Specifically, it relates to a mining method comprising rock pre-conditioning, as a way to prepare the rock to facilitate its response to caveability and fragmentation and then it relates to an ore material handling system whose main features are: simultaneous extraction from several draw points and haulage with stationary equipment towards main haulage systems. All theses processes are carried out continuously. PREVIOUS ART Overall mining process comprises two major stages: rock fracturing and its subsequent haulage. The aim of the first stage is to transform the solid material - which is the natural state of ore deposit - into fragmented material, and the aim of the second stage is to haul such fragments to their final destination. In caving exploitation, ground breaking itself is a continuous process of fracturing and fragmentation that makes use of natural forces of gravity and tectonism to achieve its goal. This process occurs naturally as a consequence of the unbalance caused by the extraction of the produced fragments, i.e., each time an amount of fragmented material is drawn, a condition of instability is originated which produces more fracturing and fragmentation, thereby, more ground breaking. However, within the conventional system of caving exploitation, material handling, which comprises extraction (loading) of ore available at points and its haulage to destination, occurs discreetly and intermittently; discreetly because the extraction is not simultaneously made from every point where ore is available, but rather from just a fraction of them; and intermittently because the extraction is made by wheel loaders working within a cycle which comprises: loading, traveling to dump, unloading and traveling back to load another bucketful. Usually, such bucketful of ore extracted discreetly and intermittently is dumped into shafts which serve as silos - where it will be loaded again at intervals into rail wagons or trucks to be hauled to the surface.
WO 2010/061274 PCT/IB2009/007556 2 Then, the whole process is based on this discreet and intermittent hauling process, since the ground breaking depends on haulage. Therefore, in order to achieve an entirely new continuous process, a continuous material handling system is required. The concept "Continuous Mining" comprises a stage of modifying the features of the rock mass where the ore deposit is located, the stage being called Pre-conditioning. At this stage, the extent of the rock mass fracturing is increased in situ, in order to obtain, in the following stage of caving, fragmented material in sizes which are compatible with continuous and automated material handling systems. Another main aspect of the pre conditioning application is to guarantee that the rock breaking will occur at a constant rate and at the same rate as the extraction process. It is well known that upon choosing an exploitation method, the location and depth of the ore deposit, deposit geometry (vein, seam, massive) and the quality of the host and mineralized rock are assessed, and based on several combinations of such elements, different solutions for each case are known. On the other hand, in the past 100 years, exploitation systems, with the exception of coal mining, have adopted the mining designs to incorporate the use of advanced construction and grund movement equipment. The development of such equipment (front loaders, trucks and others) is mainly due to the fact that within the civil work industry, the productivity is a decisive factor for business survival. Therefore, it is clear that the proposed concept of Continuous Mining breaks both paradigms. The first one, because it is not the process which is adapted to the rock conditions but the quality of the rock in situ is modified to be adapted to an efficient process of rock breaking and extraction; and the second one, because construction industry equipment are no longer used because this method requires equipment specially designed. Continuous Mining is conceived as a highly mechanized and automated process which permits to make the most of the resources invested in equipment and infrastructure. The idea is that the mine operates 18 to 22 hours a day, 360 days a year, at full capacity and within an environment complying with high safety and hygiene standards.
WO 2010/061274 PCT/IB2009/007556 3 The Continuous Mining method is rather a mining process of continuous and permanent ore flow from the deposit to the treatment plant, which could be similar to a "rock factory" where at one end, in situ reserves are fed and at the other end "treated rocks" are obtained. The method relates mainly to the continuity of the ore flow from its natural location to its final destination, which can be described as a "flow" of ore which goes through a pipe-network or means of transport without interruptions. In turn and as a consequence of the continuity of flow, there is no need to halt the process when changing shifts and thereby, Continuous Mining also means of temporal continuity in the use of mine infrastructure. Even though the term continuous mining has been somehow used, this is mainly due to the utilization of large equipment at the working face. Basically, the equipment comprises rotary drills to weaken and fragment the rock mass but later loading equipment is used to carry the ore to the treatment plant. Additionally, some developments directed to improve rock mass exploitation can be seen. Patent RU2186980 for example, describes a method comprising the exploitation of front faces as ore continuous fragmentation without pillars by driving drills on the work levels. However, neither the way ore is extracted from the mining zone nor whether this extraction is made continuously are mentioned. Similar solution can be found in patent publications RU2182663 and RU 2148712 which generally describes that caving itself is a continuous process, but if no continuous extraction or loading process is added, this caving processes will became intermittent and discontinuous, which is precisely the solution proposed by the present invention. DETAILED DESCRIPTION OF THE INVENTION The method of the present invention comprises the design and construction of exploitation drifts or draw points arranged in such a way that the ore material extracted therefrom is driven to the ore haulage drifts. Strictly speaking, the construction of exploitation drifts takes into account that haulage drifts cross the center of two groups of exploitation drifts and subsequently through every group of exploitation drifts WO 2010/061274 PCT/IB2009/007556 4 defined for the exploitation. Optionally, parallel to haulage drifts, service drifts should be constructed whose function is to allow personnel to reach the drift zone and service drifts when maintenance jobs and eventual failures are needed. Within exploitation drifts, trenches or draw points are arranged where, due the effect of ore fragmentation described below, rock mass detaches and continuous ore caving is induced. Draw point should be constructed in such a way to arrange a regular layoumii with determined distances compatible with interactive gravitational flow. When trenches are already constructed, necessary equipment is installed for extracting the ore. Likewise, necessary means are arranged in haulage drifts so that the material extracted from trenches flow permanently through haulage drifts. For that purpose, haulage drifts have for example, belt or chain conveyors, endless and stationary, commonly called "Panzer" for its high resistance to hard works (movement of large, hard and abrasive rocks). The use of this kind of conveyors replaces typical mobile low height loaders or LHD used in conventional mining. An optional way of constructing drifts comprises the construction of a material transferring level located one level downward regarding to the level of exploitation drifts, and consequently, with regard to the level of trenches. This layout allows receiving simultaneously ore material from more than one trench or draw point and accumulating in the duct material falling from the trench; this duct is formed between the trench and transferring levels. With this alternative, by accumulating material in the aforementioned duct, allows performing maintenance services in haulage drifts without stopping the exploitation process since the accumulated material can be unloaded afterwards. When drifts have been built according to the previous description, the method comprises the following stages: a) Pre-conditioning: this stage is fundamental for the method's success and comprises modifying in situ rock quality, increasing the extent of fracturing until levels which confer rocks features similar to secondary rock mass. Pre-conditioning stage can be achieved by i) hydraulic fracturing, which is a technology known in applications of oil wells exploitation, where it is used to cause fractures which facilitate oil flow from WO 2010/061274 PCT/IB2009/007556 5 wells, and in the case of metal mining, it generates fractures which facilitate the action of the natural stresses, both for generating caving and for improving granulometry; or by ii) confined blasting which is the combined action of several firings to fracture the rock mass. Finally, both techniques can be combined. Primary rock is a highly competent rock mass and massive pre-conditioning or pre treatment converts it on a material which is easy to cave and fragment by caving exploitation, which could be also called process of "secondarization" for primary ore. Nevertheless, test have shown that the best way to carry out the pre-conditioning stage is by combining Hydraulic Fracturing with Explosive Driven Dynamic Weakening, which in last case we make use of dynamic wave force collision, which is technically possible nowadays due to the electronic detonation technologies available in the market. This pre-conditioning alternative allows producing pre-stimulation of drill-holes induced by hydraulic fracturing and carrying out the electronic detonation process immediately. Another alternative is carrying out drilling pre-stimulation induced by propellant (solid fuel-based explosive) and then applying the hydraulic fracturing technology in order to propagate the fractures, the latter is a methodology used usually in oil wells. b) Caving: this stage is the rock mass caving operation by undercutting the base of rock mass by means of known procedures of caving method in well-fragmented rock environment; and its application does not present any innovation for this purpose. With the induced fracturing in the previous stage (a) it is expected that most of fragments can be processed by the continuous extraction and haulage system. The layout of draw point that should be used will be defined by the rock fragmentation features. For instance, in sectors with fine fragmentation carried out by caving methods, a layout with close points with distances ranging from 8 to 11 meters is required. This point closeness condition, makes it necessary the drifts must be small, in order to maintain the stability of the sector. The known and extensively applied solutions in the world are the extraction with grizzlies and shafts or scrapers, which allow extracting from multiple points and collect the extracted product in WO 2010/061274 PCT/IB2009/007556 6 haulage drifts. On the other hand, larger layouts with spacing ranging from 13 to 17 meters are used for primary rock sectors, with thick fragmentation. In the conventional system these layouts require using very large LHD equipment and it is not possible to make parallel extraction from those points. In the case of Continuous Mining, the sizes of the layouts that have been assessed are between 13 x 13 square meters and 15 x 15 square meters. Both layouts are quite wide and are useful to handle oversize mucks or boulders. c) Extraction: this stage is conceived as a simultaneous operation from multiple draw points arranged on a regular layouts at certain distances which are compatible with the interactive gravitational flow. For that purpose, as it has already been mentioned, each draw point is equipped with a stationary extraction unit which feeds a collecting system that conveys the ore to the haulage drift by continuous means that leads it to its destination. The extraction and haulage equipments have an automatic command- assisted by a remote driver operated from a control room as in any modem industry. Eventually, crushers could be installed at the end of the collecting systems to produce in the mine the final feeding size for the plant. In short, wheel loaders are not used because they are replaced by continuous loading systems. By way of example, stationary "feeders" that unload continuous conveyors can be considered. The main haulage alternative used is a metal belt conveyor (panzer) in which the preliminary assessments show lower operation costs compared to the traditional raildrift haulage system. Applying a continuous mining system as the one that have been described has a great impact on the caved area performance which is usually expressed as "extraction rate" and is measured in tpd/m 2 . In fact, in the conventional LHD-extraction system, discreet and intermittent, each loading system extracts ore from a set of draw points (generally 16 draw points per equipment) at the rate of 200 t/hour. Approximately 250 m 2 influence area is associated to each extraction point so a 16 point module comprises approximately 4,000 m 2 , thus in a maximum operation of 15 hours a day an extraction of 3,000 t WO 2010/061274 PCT/IB2009/007556 7 equivalent to 0.75 tpd/m 2 can be achieved. On the other hand if we assume that the extraction is made regularly, less than 200 t a day is drawn from each point which is equivalent to using less than one hour daily (let us remember that LHD can draw 200t/hour). The historical figures for actual extraction rate are around 0.4 tpd/m2 and for 2. effective extraction rate are around 0.5 tpd/m , since the ore flow through the extraction points is no fast enough to saturate the production capacity of the equipments. The expression "actual extraction rate (AER)" is used to refer to the total extraction achieved in a day from a certain active area, if the points have or have not been available for extraction; and the terms "effective extraction rate (EER)" relates to the estimated extraction rate considering only the area of those points that effectively were object of extraction during that day. The difference is explained because one portion of the active area can be transiently out of service due to direct maintenance or repair of draw points, hauling or destination facilities. Continuous Mining aims to improve these figures by increasing the use of extraction points to an average of 16 hours daily (two operation shifts and one maintenance shift) with a 40 t/hour production per stationary extractor. Thus if we consider in an easy exercise where 8 points of 225 m 2 influence (1800 m 2) operating 16 hours a day, a 5,400 tpd production, a 3 tpd/m2 extraction rate (EER) and an actual extraction rate (AER) around 1,5 tpd/m2 are provided. This results in a better use of the caved area as well as a concentrated operation with its consequent resource rationalization. For the fragmented material in such conditions, the achievable extraction rate in the caving propagation stage can reach 300 mm/day which is equivalent to approximately 0.8 tpd/m 2 and theoretically there are no limitations for the gravitational extraction stage post propagation except the extraction capacity, that in the invented system could reach rates above 3 tpd/m2
Claims (14)
1. A method useful in the continuous ore extraction in underground works intended for the permanent production of extraction from draw points or trenches, comprising the construction of reduced size drifts wherein through the center defined by a group of drifts crosses a drift which is intended for ore haulage, such drift crosses successively all drift groups defined at the exploitation face; such extraction points are arranged to form a regular layouttm2] at certain distances which are compatible with an interactive gravitational flow; once such drifts, trenches and haulage drifts are constructed the following stages are carried out: a. Pre-conditioning consisting in modifying the in situ rock by intensifying its fracturing degree until reaching the levels that turn such rock into a rock with secondary rock mass features, b. Caving consisting in caving the rock mass by undermining its base through well known procedures in well-fragmented rock environment, and c. Extraction consisting in the simultaneous operation from multiple draw points defined during the construction stage of such exploitation drift.
2. A method useful in the continuous ore extraction of Claim 1 wherein once such trenches have already been constructed, stationary equipments are installed on such trenches in order to produce the extraction of ore.
3. A method useful in the continuous ore extraction of Claim 1 wherein in such haulage drifts permanent haulage means are provided for hauling the material that is being extracted from the trenches across such drifts.
4. A method useful in the continuous ore extraction of Claim 3 wherein such means that are provided in the haulage drifts are belt conveyors or endless chain belt conveyor usually known as "Panzer" in the mining jargon. WO 2010/061274 PCT/IB2009/007556 9
5. A method useful in the continuous ore extraction in Claim 1, further comprising the construction of a level for material transference located at a downward level with regard to the level defined by such exploitation drifts and consequently at a downward level with regard to such trench level.
6. A method useful in the continuous ore extraction of Claim 6 wherein a construction of a duct is carried out between such exploitation drift level and such transference level, into such duct the material falls from the trench to such transference level, and also it allows material accumulation.
7. A method useful in the continuous ore extraction of Claim 1 wherein such pre-conditioning stage is carried out by hydraulic fracturing.
8. A method useful in the continuous ore extraction of Claim 1 wherein such pre-conditioning stage is carried out by confined blast or explosive-driven dynamic weakening.
9. A method useful in the continuous ore extraction of Claim 1 wherein such preconditioning stage is carried out by the combination of hydraulic fracturing with explosive-driven dynamic weakening
10. A method useful in the continuous ore extraction of Claim 1 wherein such regular layout[m3] is provided with extraction points at distances ranging from 8 to 15 meters.
11. A method useful in the continuous ore extraction of Claim 1 wherein such pre-conditioning stage should produce a fragment size capable of being drawn and hauled by the system.
12. A method useful in the continuous ore extraction of Claim 1 wherein each draw point is provided with a stationary extraction unit that extracts the ore from the trench and feeds a collecting system provided at trench outlet so as WO 2010/061274 PCT/IB2009/007556 10 to convey the ore towards such haulage drift by continuous means leading it to its destination.
13. A method useful in the continuous ore extraction of the previous Claims wherein the extracting, collecting and haulage means have an automatic command-assisted remote driver operated from a control room.
14. A method useful in the continuous ore extraction of Claim 13 wherein crushers are installed at each end of such collection system to produce the plant final feeding size inside de mine.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2016222451A AU2016222451A1 (en) | 2008-11-28 | 2016-09-01 | Continuous mining |
AU2018202700A AU2018202700A1 (en) | 2008-11-28 | 2018-04-18 | Continuous mining |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CL2008003560A CL2008003560A1 (en) | 2008-11-28 | 2008-11-28 | Method for the continuous extraction of mineral in underground works, destined for the permanent production of extraction from the points of exploitation, includes building exploitation galleries, in which the center defined by a group of galleries crosses a street to transport ore, and preconditioning of rock. |
CL3560-2008 | 2008-11-28 | ||
PCT/IB2009/007556 WO2010061274A1 (en) | 2008-11-28 | 2009-11-25 | Continuous mining |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2016222451A Division AU2016222451A1 (en) | 2008-11-28 | 2016-09-01 | Continuous mining |
Publications (1)
Publication Number | Publication Date |
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AU2009321259A1 true AU2009321259A1 (en) | 2011-06-30 |
Family
ID=42077378
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
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AU2009321259A Abandoned AU2009321259A1 (en) | 2008-11-28 | 2009-11-25 | Continuous mining |
AU2016222451A Abandoned AU2016222451A1 (en) | 2008-11-28 | 2016-09-01 | Continuous mining |
AU2018202700A Abandoned AU2018202700A1 (en) | 2008-11-28 | 2018-04-18 | Continuous mining |
Family Applications After (2)
Application Number | Title | Priority Date | Filing Date |
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AU2016222451A Abandoned AU2016222451A1 (en) | 2008-11-28 | 2016-09-01 | Continuous mining |
AU2018202700A Abandoned AU2018202700A1 (en) | 2008-11-28 | 2018-04-18 | Continuous mining |
Country Status (12)
Country | Link |
---|---|
US (1) | US20120181844A1 (en) |
EP (1) | EP2370673B1 (en) |
CN (1) | CN102264998A (en) |
AP (1) | AP3679A (en) |
AU (3) | AU2009321259A1 (en) |
CA (1) | CA2745066C (en) |
CL (1) | CL2008003560A1 (en) |
MX (1) | MX2011005722A (en) |
PE (1) | PE20120378A1 (en) |
PL (1) | PL2370673T3 (en) |
RU (2) | RU2702494C2 (en) |
WO (1) | WO2010061274A1 (en) |
Families Citing this family (11)
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CN102278114B (en) * | 2011-09-01 | 2013-01-23 | 长沙矿山研究院 | Stereo partition mass ore caving mining method |
AU2014256811A1 (en) * | 2014-02-26 | 2015-09-10 | Guillermo BASUALTO LIRA | Back and forth extractor/feeder placed into the drawpoints in underground caving mining |
EP3090968A1 (en) * | 2015-05-07 | 2016-11-09 | Caterpillar Global Mining Europe GmbH | Material handling system and method of operating the same |
CN105545307A (en) * | 2015-12-11 | 2016-05-04 | 大同煤矿集团有限责任公司 | Method for over-pit and under-pit cooperative control of roofs of far and near fields of extra-large stoping space |
CN109458180B (en) * | 2018-09-17 | 2020-07-14 | 东北大学秦皇岛分校 | Mining method combined with underground warehouse construction and ventilation cooling system |
RU2712848C1 (en) * | 2019-05-08 | 2020-01-31 | Федеральное государственное унитарное предприятие "Российский Федеральный ядерный центр - Всероссийский научно-исследовательский институт экспериментальной физики" (ФГУП "РФЯЦ-ВНИИЭФ") | Underground mining method of mineral deposits |
CN112031771B (en) * | 2020-09-18 | 2023-06-06 | 玉溪矿业有限公司 | Cutting groove pulling method with safe construction |
CN112414237B (en) * | 2020-10-28 | 2022-09-16 | 云南迪庆有色金属有限责任公司 | Method for treating over-hard surrounding rock by natural caving method |
CN113431581B (en) * | 2021-07-26 | 2022-02-22 | 中南大学 | Non-blasting mechanical intelligent mining method for deep hard rock ore body |
CN114233258A (en) * | 2021-12-08 | 2022-03-25 | 核工业二三O研究所 | Fracturing method for difficult-to-leach sandstone uranium deposit reservoir transformation |
CN115680761B (en) * | 2023-01-05 | 2023-04-07 | 山西冶金岩土工程勘察有限公司 | Multi-layer goaf subsection grouting treatment construction process |
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RU2261329C1 (en) * | 2004-06-23 | 2005-09-27 | Институт горного дела Сибирского отделения Российской академии наук | Method for coal excavation from thick steeply beds |
RU2283430C1 (en) * | 2005-05-05 | 2006-09-10 | Государственное образовательное учреждение высшего профессионального образования "Санкт-Петербургский государственный горный институт им. Г.В. Плеханова (технический университет)" | Method for thick steep seams mining |
DE102005043236B4 (en) * | 2005-09-09 | 2016-08-04 | Caterpillar Global Mining Europe Gmbh | Arrangement for mining of mining products in underground mining operations in quarry construction |
CN100497886C (en) * | 2006-05-31 | 2009-06-10 | 段连权 | Coal mining process including prop type mining and prop recovery |
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2008
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2009
- 2009-11-25 WO PCT/IB2009/007556 patent/WO2010061274A1/en active Application Filing
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AP2011005750A0 (en) | 2011-06-30 |
MX2011005722A (en) | 2012-06-01 |
EP2370673A1 (en) | 2011-10-05 |
CA2745066C (en) | 2018-10-23 |
WO2010061274A1 (en) | 2010-06-03 |
RU2011124898A (en) | 2013-01-10 |
PE20120378A1 (en) | 2012-04-26 |
CN102264998A (en) | 2011-11-30 |
CA2745066A1 (en) | 2010-06-03 |
RU2015126488A (en) | 2018-12-24 |
PL2370673T3 (en) | 2019-12-31 |
RU2015126488A3 (en) | 2019-02-12 |
RU2702494C2 (en) | 2019-10-08 |
US20120181844A1 (en) | 2012-07-19 |
CL2008003560A1 (en) | 2009-05-04 |
EP2370673B1 (en) | 2019-02-27 |
AP3679A (en) | 2016-04-17 |
AU2018202700A1 (en) | 2018-05-10 |
AU2016222451A1 (en) | 2016-09-29 |
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