Experience in the mining industry the alimak rack and pinion elevator is the perfect solution for both underground and surface mining industry applications, such as pelletising plants, smelters, concentrators, and other ore processing plants. The conventional manual method of raising is slowly being replaced by alimak raising. More selectivity the rxise drill holes make this method very effective in narrow veins. Nov 12, 2019 alimak production mining, manroc developments inc. Ore is mined using sublevel caving, with sublevels spaced at 28. To assess this information and to extrapolate to the next twenty years, this approach has been reinforced using published. Once the slot raise slot has been completed, the equipment. The method used at david bell mine is the alimak mining method. A remarkable turnaround penguins robots are being tested with the goal of removing hazardous jobs from the mine, including taking scans of an ore pass after blasting or working. Since drills can only reach so far, the traditional approach demands sublevels about every 25 metres. The lhds load ore that has been blasted on each sublevel into the ore passes that are opened at the bottom to fill trains waiting on the main level.
In quebec, ore passes were developed 63% of the time by alimak raise, 29% by conventional raise, 5% by drop raise and 3% by raise bore. The alimak method offers solutions in the development of reef raises, boxholes, ventilation passes, shafts, etc. The five steps are all dependent on the raise climber, which. That means less development in waste rock and a reduction in costs. Ore pass design and placement tu delft repositories.
Alimak rack and pinion elevator in the mining industry youtube. In quebec, ore passes were developed 63% of the time by alimak raise. Ore pass system performance can be addressed by identifying three distinct stages of flow, stage 1 into the ore pass, stage 2 in the ore pass and stage 3 out of the ore pass fig. The alimak elevator is the perfect solution for underground, as well as aboveground mining industry applications, such as pelletizing plants, smelters, concentrators, and other ore processing plants. However, for narrower veins, the longitudinal retreat mining is used. Meet the industry leaders who shape the future of mining across europe, middle east and africa. Alimak raise climber pdf the alimak raising method consists of five steps, which together make up a cycle. Trains transport the ore from the ore passes to a crusher, which breaks the ore into pieces of four inches or less, a size that can be lifted by a bucket.
The excavator 152 excavates slices 172 a h of the orebody 100 by moving generally updip, downdip or a combination thereof. Pdf observation of ore pass system performance at brunswick mine. Diagram on the left shows the type of equipment used for alimak mining and the figure on the right shows the typical alimak mining cycle. In quebec mines, alimak raising was used in 63% of driven ore passes while only 3% were raise bored. It is an overhand mining method that relies on broken ore being left in the stope to be used as the working floor and to support the walls. Golden star was once associated with refractory ore, volatile recovery rates, high. The term ore pass is a misnomer since all mine material including both waste. Successful users of the technique have found that it accelerates their path to production by centring development work within the ore body. The lhd vehicles that haul the ore under automatic control to the ore passes have a payload of 21. Ore from the two mines is also comingled and fed to a standard grind, leach and carboninpulp extraction mill to help ensure production costs are carefully controlled. Most common applications include ventilation shafts, ore passes, media and utility holes. Hemlo shines canadian mining journalcanadian mining journal.
Ore and waste passes queensminedesignwiki mine wiki. Alimak rack and pinion elevator in the mining industry. Manroc is a world leader in alimak mining and the only contractor of its kind in canada to continuously pursue new technologies and applications relating to narrow vein horizontal stope mining. Choice of method welcome to the narrowvein mining project. A ramp is not required and, in many cases, neither is the muck pass and ventilation raise of a regular stoping system. Pdf observation of ore pass system performance at brunswick. As mining technology generally developed, so did drilling techniques and the explosives used. If an ore pass is considered a linear system, failure at any one stage of the operation will.
In underground mining, a raise refers to a vertical or inclined excavation that leads from one level, or drift, to another. Ore pass article about ore pass by the free dictionary. In the past upward mining with men working from a cage hung from a cable through a small pilot hole drilled downward from above. After the ore body has been delineated and defined, a company may make. Shrinkage stoping is a mining method used for steeply dipping, narrower ore bodies with self supporting walls and ore. A raise is a vertical or inclined opening developed upward from one level to connect with a level or levels above. The selection criteria for the alimak mining method are numerous. Depicted here is the ore body, consisting ofvarious production blocks and with ore passes located at the center ofeach production area. A true innovation in underground mining, the alimak method provides the highest safety standards in the industry, while increasing productivity, adding greater flexibility and maneuverability, and reducing overall mining costs. Most of the rest of the development is in ore see centerfold. However, he states that in later years where the mining had progressed to the dip, this. May 2010 shrinkage stoping is a mining method used for steeply dipping, narrower ore bodies with self supporting walls and ore. What follows are the typical phases of a proposed mining project. Alimak is one of the most common ore pass raising and dropraising techniques.
It also offers the mining industry a unique mining method using. The revenue from the sale of the ore keeps the venture going and finances further development. Advantages of alimak method are the unlimited length of raise, low. Although ore pass size is the most important factor influencing material flow, quite often it is the size of the alimak platform and not engineering considerations that decided the dimensions of an ore pass.
Manroc developments inc the gold standard in global. An alimak rackandpinion elevator at the flotation process of a concentrating plant at a mine. To identify risks to worker health and safety and to work with employers and workers on reducing those risks to provide more information to employers and to workers and their representatives about risks at the sector level. May 26, 2019 raise climber mining method details the raise climber mining method will generally be comprised of the following steps. The intervals between ore passes should be no more than 150m or 500ft, while waste passed should be no more than 230m or 750ft apart. This project was completed mainly through the use of questionnaire sent to subcontractors in almost each country of the eu. The present invention is directed to a mining method for steeply dipping orebodies.
The kiln is dwarfed by the massive preheater tower and cooler in and a poorly run kiln can easily double cement plant download as pdf. Ore pass practice in some canadian mines ore pass systems are an integral part of the materials handling system in the majority of canadian underground mines. Because of the ores high grade, once mining has been completed in a sublevel, the floor is cleaned all the way to the ore pass, so that any spilled gold is recovered. We can assist you with all your underground mining requirements. The raise climber serves both as working platform and as a means of transport up to the work face. Ore passes are developed using two conventional methods. Martin mining and tunnelling pty ltd is a mining contractor with offices in kalgoorlie, wa, australia and timmins, ontario, canada. There are different phases of a mining project, beginning with mineral ore exploration and ending with the postclosure period. In theory, and if properly cabled, the foliated hangingwall could be approximated as a laminate beam by the voussoir approach, as described by hutchinson and diederichs there are several. Ore pass systems are used in mines to transfer broken material from one mine level to a lower level using. The main one is based on economic and the other ones are.
During the visit, the mine was putting more emphasis on the narrowvein mining method. Raise boring and alimak raising excavation methods are typically used to construct longer ore passes. Cablebolts or rockbolts are installed in the hangingwall of the raise, to provide reinforcement for the mid span of the future stope hangingwall. The dominance of alimak raises is attributed to the reasonable safety of the method, the fact that only one access is required as opposed to raise boring which both bottom and top access is required, and the.
Kiruna iron ore mine mining technology mining news and. In the method, an excavator 152 is tethered to a deployment system 120 by one or more cablesumbilicals 144. Material flow problems also result in ore passes that are not steep enough. A long hole stoping system for mining narrow platinum reefs. Mining industry response to the book continues to be incredible.
A number of support systems for ore passes are available. An alimak stope is developed firstly by mining an alimak raise up the hangingwall contact of the orebody. Mike neumann, neumann engineering and mining services inc. In opening a mine, a small mining company usually digs any ore that is showing. Thanks in large part to the efforts by john chadwick of the mining journal, and many other members of the mining community, the hard rock miners handbook has been distributed to over 1 countries worldwide. Alimak production mining, mine engineering, alimak raising, lateral development, narrow vein mining ken mckirdy, chief engineer at manroc, says the alimak method provides benefits beyond ore access. Ore and waste passes should be designed to intersect levels and sub levels in order to offer access to clear hang ups with ease. Hundreds of alimak ele vators have been delivered to a variety of mine applications. Golden star, manroc devt agree on alimak mining method. Alimak hek mining technology mining news and views. Us20030173819a1 mining method for steeply dipping ore. These drifts are driven from the shaft or established mining areas to the new ore zone. Seven alimak elevators for bolidens aitik mine expansion. The ore passes provide access from the sublevels to the haulage level.
Manroc developments inc the gold standard in global alimak. In quebec mines, alimak raising was used in 63% of driven ore passes while only 3% were raise. Table of contentsauxiliaries actuated by oil under 5 lb. Manrocs alimak method provides the highest safety standards in the industry while increasing productivity and adding. A main wire rope hoist, suitable for carrying heavy loads at relatively fast speeds, is the primary means of vertical access for men and materials. Raise mining is a longhole method of bulk mining tabular narrow vein ore bodies. A long hole stoping system for mining narrow platinum reefs the journal of the south african institute of mining and metallurgy april 2002 153 figure 4project site production plan actual face advance 2 m per blast 1. Ore passes are developed using either mechanical raise borer or drill and blast techniques alimak, conventional raising and drop raising. In situ stress at the lucky friday mine in four parts. Ore from these ore passes will be fed by conveyor to the ore bins. Since alumak introduction, the raise climber has been developed and improved into what is now the 6th generation, the alimak rcmseries, enabling fast, mechanized drilling of long, inclined. Observation of ore pass system performance at brunswick mine. Apr 12, 2017 an alimak rackandpinion elevator at the flotation process of a concentrating plant at a mine. Each phase of mining is associated with different sets of environmental impacts.
The saskatoonbased gold miner had increased its yeartodate gold production by 63 per cent overthanks in part to a successful implementation of the alimak mining method at its seabee gold mine in saskatchewan. Conventional and drop raises represent 29% and 5% of the sections, respectively. Sep 08, 2015 ore passes are developed using either mechanical raise borer or drill and blast techniques alimak, conventional raising and drop raising. Characterization of mine in situ stress field by j.
Smith 1990 reported that the cleveland deposit was associated with a very strong stone roof rock known as dogger allowing mine drivages to be selfsupporting. Numerical investigations of ore pass hangup phenomena. Raises are used in underground mines for access, ventilation, ore or waste passes, or to provide an initial free face for production blasting. Ore passes need to be properly supported to ensure adequate safety. Raise climbing, widely known as the alimak mining method after the company that introduced it, is a variation on longhole stoping developed for narrowveined, tabular ore bodies. Martin mining and tunnelling pty ltd offers services in mine contracting which include shaft raising, raise enlarging, excavation of rock passes and ventilating systems. Jul 20, 2019 the platform can be any shape and size. The main source of information is a comprehensive study by hadjigeorgiou and lessard 2004 in. In 1957 this procedure was improved by swedish development of the raise climber, whose working cage climbs a rail fastened to the shaft wall and extends backward into the horizontal access tunnel into which the cage is retracted during a blast. Two alimak rise ore passes are in progress from level 8 to level 6 and are expected to be operational in august 20. Where hangups have been a problem, either from cohesive arches or interlocking arches, ore passes are operated as near to empty as possible kiruna mine.
This paper presents some observations from a series of indepth studies in canadian mines. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. Alimak developed two special units based on its rcm6 system to reinforce the ore passes with cable bolts and shotcrete as necessary. Once the slot raise slot has been completed, the equipment can be dismantled and moved to the next drill site typically, such shafts are large in diameter and long, taking several weeks to complete, as such the setup time is insignificant. Pressurepressure on lowpressure cylinder automatically regulatedcondenser operates under severe conditionshoisting speed 1,300 to 1,600 ft. Alimak stoping this method extracts the ore in horizontal rather than vertical slices.
May 24, 2014 ore passes are developed using two conventional methods. Sep 22, 2016 the alimak mining method, which manroc prides itself as the inventor, uses an alimak raise climber to develop a raise in the ore body followed by drilling production holes in the ore body and. The alimak mining method, which manroc prides itself as the inventor, uses an alimak raise climber to develop a raise in the ore body followed by drilling production holes in the ore body and. Hemlo general manager andrew baumen says that gold ore is mined at the operation using two quite different mining methods.
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