drift fill mining method

The drift and fill method can be applied to a variety of underground mining situations and is a preferred method for some orebody geometries and where ore recovery is viewed as a key to project success This paper examines some of the critical mine planning and backfill issues involved with the

Drift mining is either the mining of an ore deposit by underground methods or the working of coal seams accessed by adits driven into the surface outcrop of the coal bed A drift mine is an underground mine in which the entry or access is above water level and generally on

In overhand cutandfill mining the most common variation mining starts at the lower level and works upward In underhand cutandfill mining work progresses from the top downward In this latter case cement must be added to the fill to form a strong roof under which to

Cut and fill mining is a highly selective openstope mining method considered ideal for steeply dipping high grade deposits found in weak host rock Many variations of the general cut and fill technique exist however this article will focus on overhand cut and fill

Underhand cut and fill mining methods are used at the Lucky Friday Stillwater and Galena mines in the western US in an effort to safely mine in difficult ground conditions and as a primary mining method where access below the ore is limited The method has evolved at each mine to meet the unique situations associated with their milling procedure

Drift and Fill This technique is similar to conventional overhand cut and fill except that ground conditions do not permit opening up the stope to the full width of the orebody Depending on the amount of dilution that can be tolerated some binder is required for the initial drifts on a level Drift and fill can be mechanized or captive

Mining Method Drift Fill Transverse stoping Cemented backfill Processing Pressure oxidation Resin in leach RIL Carbon in leach CIL Thiosulfate reagent Roasting Mine Life 9 years as of Jan 1 2014

Figure showing cut and fill mining method Remove ore in horizontal slices starting from a bottom undercut and advancing upward As each horizontal slice is taken the

Disadvantages C Fig 2 is a wide raise or raise stope which is one method of opening an overhand stope and E is a drift stope which is a term used in the Lake Superior copper mines and means a wide and high drift as a start for the overhand stoping

Oct 23 2011 · Mining methods for s teeply dipping and massive deposits Self supported methods Sublevel caving Block caving Induced Block Caving Sublevel stoping Undercut and fill stoping Squareset stoping Cutandfill stoping Shrinkage stoping With caving of overburden Without caving of overburden Supported methods Large open stope mining Top slicing

Drift Mining Drift mining is a process of accessing precious geological material like coal by cutting into the side of the earth rather than tunneling directly downwards Drift mines have flat entries into the coal seam from a hillside

underground mining In mining Cutandfill mining In overhand cutandfill mining the most common variation mining starts at the lower level and works upward In underhand cutandfill mining work progresses from the top downward In this latter case cement must be added to the fill to form a strong roof under which to

Drift and Fill is similar to cut and fill except it is used in ore zones which are wider than the method of drifting will allow to be mined In this case the first drift is developed in

Cut and Fill mining is a method of short hole mining used in narrow ore zones An access ramp is driven off the main level to the bottom of the ore zone to be accessed Using development mining techniques a drift is driven through the ore to the defined limit of mining

Abstract Olympias Mine is operated by Hellas Gold SA a subsidiary of Eldorado Gold Corporation The orebody shape and size are suitable for a drift and fill mining method The mining sequence is overhand and the demand for backfill strengths are generally low except for the initial sill cuts

Stoping Mining Methods In this bulletin the term “stoping” is employed in its broader sense to mean the operation of excavating ore by means of a series of horizontal vertical or inclined workings in veins or large irregular bodies of ore or by rooms in flat deposits It covers the breaking of ore and its removal from underground workings

Primary Mining Method Overhand cutandfill Information The ground support consists in 12m 4 ft Splitset bolts on a 12 m x 12 m 4 ft x 4 ft pattern on the back For every 24m 8ft advance a row of 4 resin anchored rockbolts Dywidag of 18 m 6 ft long is installed The wall support is secured by 09m 3 ft Splitset bolts

Drift and Fill is similar to cut and fill except it is used in ore zones which are wider than the method of drifting will allow to be mined In this case the first

Oct 23 2011 · Mining methods Induced block caving with blasting on the broken rock 1 drilling drifts 2 level drift 3 haulage drift 4 draw points 5 control crosscut Cutandfill stoping 1 haulage drift 2 transport drift 3 rise for fill and ventilation 4 ore passe 5 manway rise 6 crosscut 7

Mining Method Drift Fill Longhole stoping Processing Flotation Concentrate leach Carbon in leach CIL Solvent Extraction Electrowinning Cyanide reagent Roasting

The mining method known as cutandfill which incorporates backfilling in its operational cycle is ranked as a major method of underground mining Even the roomandpillar mining and sublevel stoping methods also employ backfills such that the remnant pillars can be recovered after the primary mining operations have been completed

The cut and fill method is used for ore bodies that are irregular in shape have a shallow dip and have relatively high value ore Almost all of the ore can be extracted with this method The stopes are accessed using a waste attack ramp Up to five driftandfill cuts can be mined off each attack ramp

Oct 23 2014 · Note Drift and Fill is similar to cut and fill except it is used in ore zones which are wider than the method of drifting will allow to be mined In this case the first drift is developed in the ore and is backfilled using consolidated fill The second drift is driven adjacent to the first drift

Secondary Mining Method Longhole open stoping Information Hydraulic fill is used to backfill the stope In order to pour the fill into the stope two holes are drilled from the upper level down to the stope opening The hydraulic fill is poured into one hole fill hole and

dictate selective mining methods in order to maximise ore extraction The current mining methods include transverse and longitudinal drift and fill DAF mined in an overhand bottomup sequence over 20 m high sublevels Conventional mechanised 5 m wide × 5 m high drill and blast and load‐haul‐dump methods of extraction are

Jan 27 2014 · Standard mining techniques include cut and fill or drift and fill ore is mined and the stope filled with tailings raising the level of the mining shrinkage stoping – similar to cut and fill except the ore is blasted and left in place and used as a mining platform

How Underground Mining Works This method can be used in wider deposits as well by drilling two adjacent access ramps and cutting two adjacent drifts often called drift and fill sources Mining KnowHow Cut and fill is for hard rock as it doesnt feature the support mechanisms inherent in and central to a method like room and pillar

Primary Mining Method Longhole modified Avoca Information Uncemented rock fill is used as backfill The waste is brought by truck to a waste pass The waste pass is accessible from each of the access drifts A scooptram takes the waste rock from the drawpoints to the stope The filling of the stope is done from the superior sublevels to the open stope

Mines using this method as a sole source of ore typically produce between 200 to 800 tonne per day Mechanised Cut and Fill This is the classic method for mining narrow orebodies and involves extracting the ore in small slices 2 to 4m high working from the bottom upwards

Novel Underhand CutandFill Stoping Method and Mechanical Analysis of Overlying Backfill ing back fi ll for a singledrift mining mode and concluded that

highly productive mining methods are unselective and result in an increase in unwanted dilution Often the adoption of a more highly productive mining method is precluded by the inherent decrease in head grade delivered by the method through this increased dilution However bulk mining methods can lower the cost of mining and hence

The underhand method under consolidated fill ensures a high recovery under an engineered backthat is comprised of cemented rock fill andor cemented paste fill This method of mining is generally necessary eitherdue to a weak rock mass comprising the immediate back andor high induced back stresses

Introduction Application of CutandFill C F stoping The activity cycle of the C F method Stages of the production cycle of the C F method Sequences of extracting ore bodies Filling in C

underground mining method was defined during the feasibility study with limited information With the experience from the underground mining and more rock mechanical and geological data this thesis was conducted to study if there could be more cost effective method

Stull stoping is a form of stoping used in hardrock mining that uses systematic or random timbering stulls placed between the foot and hanging wall of the vein The method requires that the hanging wall and often the footwall be of competent rock as the stulls provide the only artificial support

A variety of specific techniques can be used for mining the ore depending on the geology of the area such as block caving which allows massive stripmine scale underground excavation or the more steretypical cutandfill and driftandfill techniques where miners dig our out in long horizontal tunnels

Evaluation of Overhand Cut and Fill Mining Method used in Bogala Graphite Mines Sri Lanka P G R Dharmaratne P V A Hemalal and M C Hettiwatte Abstract This paper includes the study of the mining method adopted at Bogala Graphite Mines and its suitability compared with other mining methods used in the mining industry