Category: Bench Drilling and Quarrying

FIJI – A new dot on the Robit world map

Posted on by Jari Silver

“Tranquillity” is a word that easily comes to mind on Fiji, the island country sitting almost 3,000 kilometres away from its nearest continent Australia. An ever-growing number of visitors are feeling the allure of its white sandy beaches and coral reefs, making tourism a key driver in Fiji’s economy today, along with agriculture and fishing.

Fiji has also been blessed with wealthy mineral resources, with gold and silver representing some of the country’s largest exports. So-called Development Minerals – minerals mined, processed, and used locally in construction, infrastructure, and agriculture – also play an important part in Fiji’s growing economy. This year, the very first Fiji Development Minerals Trade Fair and Conference was held in Suva, the capital city of the republic. The event, hosted by UNDP (United Nations Development Program) and MRD (Mineral Resources Department of Fiji), also helped Robit add a new dot on its global business map.

“It was a great opportunity to network, meet key players in the Development Minerals industry and get a better understanding of the opportunities and challenges facing Fiji’s Development Minerals market”, says Technical Sales Representative Richard Epstein, Robit Australia.

“Fiji is diversifying its economy and improving its civil infrastructure, which should have a positive impact on the quarrying and civil construction industries. This means there is an opportunity to gain a strong foothold in the market. To that end, we are partnering with Vinod Patel, Fiji’s largest hardware and construction materials company to help establish our presence in the market and provide much needed local support”, Richard explains.

Golden prospects

Richard also visited the Vatukoula Gold Mine, the largest and oldest mine in Fiji. It has been operating for over 75 years and has produced over 7 million ounces (approx. 200,000 kg) of gold during this time. “Vatukoula spends about half a million euros per year on Top Hammer drilling consumables, but this is likely to increase in coming years as they have plans to expand development of the mine and double production”, Richard says.

“Robit’s threaded jumbo bits were tested underground at Vatukoula, with promising results. A new gold mine, Lion One, is due to come on line in 2019. Add to that our partnership with Vinod Patel and the contacts we have established through them with key players in the quarrying and extractive industries, and we should be well positioned for future opportunities in Fiji.”

Ylimäki quarries with more than 30 years of experience

Posted on by Jari Silver

Markku Viitanen sits in the cab of the drill rig, wearing protectors on his ears and expertly operating the joystick. An echo sounds out from the surrounding forest as Robit’s drill bit is hammered into the rock. It’s a typical day at the office for Markku. And the quarry, located in Karstula, central Finland, is a typical work site for Markku’s employer, Louhintaliike Ylimäki.

This is Markku’s third day of drilling at the quarry. Red borehole plugs in the snow mark the holes that have already been drilled. The 83-millimetre bore holes are being drilled to a depth of 10–12 metres, down to the bottom level of the quarry. Half of the roughly 1,600 metres to be drilled has already been completed. As a quarrying site, this one is of a moderate size, at 25,000 tonnes. Large sites can be in the range of 100,000 tonnes.

When the boring work is completed, the shot-firing team takes over. An explosive, such as ‘Kemiitti’ – an emulsion explosive developed for open-cut excavations – is loaded into the hole, and a second explosive is placed on top as a guarantee. The area is blasted. A hydraulic hammer is used to break any oversize rocks into a crushable size. At this point, Louhintaliike Ylimäki’s work at this quarry is finished; another contractor will take over the crushing operations.

– Ylimäki’s main areas of operation are western Finland and northern Ostrobothnia, and its main customers are aggregate suppliers and crushing companies,” says civil engineer Matti Pitkäjärvi, who supervises the work at the company’s quarrying sites. Blast rock is also produced at the Karstula quarry, to be crushed for infrastructure construction or concrete or asphalt production, for example.

Industry leader after three decades

Louhintaliike Ylimäki Oy is a family business that was established in 1983. The company started out small, with rented equipment, but over the decades has grown to become the largest rock extractor in the region. With about 20 employees and a solid equipment base, Ylimäki blasted five million tonnes of rock in 2014. A second generation of Ylimäkis – brothers Matti and Mikko – now run the company.

How does a regional operator competing with major national companies survive?

– We’re doing well. We have a lot of long-term, established customer relationships. With adequate and modern equipment, expert staff and reasonable prices, the customers are happy. We don’t have to fight for every site, says Matti.

Annual contract speeds up processes

Louhintaliike Ylimäki has been drilling with Robit bits for a long time. And as Robit’s Sales Manager, Mika Mankinen, recounts, co-operation between the two companies was taken one step further in 2015: they entered into an annual agreement covering not just drill bits, but also shank adapters and drill rods.

– It came down to the price/quality ratio or, to put it in more concrete terms, cost per drilled metre. The Finnish aspect is also an important criterion,” says Matti, elaborating on how the deal came about.

The annual agreement will simplify the purchasing process, and drilling equipment will come at a fixed, competitive price. A volume-based price saves the customer not only money, but the headache of having to negotiate a price separately for every construction site. The process is as simple as can be: Matti makes an order and Robit delivers the agreed amount of products.

– The co-operation between Ylimäki and Robit has for years been practical and smooth. We can always call Mika if new requirements or requests arise during a drilling job, says Matti. – Robit is always able to flexibly respond to changes or development needs, Mika adds.

For this western Finland quarrying company, business is going well. When asked about the bigger challenges facing the company, Matti pauses to think about it.

– In this business in general, the challenge is the unequal distribution of the work load – the ups and downs of the quiet and busy times of the year. But we don’t experience that. Our fleet of equipment is always in use, says a pleased Matti.

Strong hands in the Australian soil and market

Posted on by Jari Silver

Rolling grass plains and awesome rock faces rising up behind them – it’s like a scene out of a western movie. A monotonous pounding can be heard beyond the mountains. Yet we are not in the prairies and the bangs are not from revolver guns. The source of the noise is a Robit Hyper 181 Down-the-Hole (DTH) hammer striking deep into Australian soil, more precisely the mineral deposits of Narrabri.

Lucas Drilling Services, part of the Australian AJ Lucas Group Limited, is more or less halfway through a major coal mine project at the Whitehaven Coal company’s Narrabri North mine. They have drilled around 50 holes down to the bedrock, the deepest ones extending to 240 metres. Around 70 holes remain to be drilled.

Lucas Drilling selected for the project T120XD and Schramm T685 drill rigs equipped with the Robit Hyper 181 DTH hammer. The contractor requested a brand-new 18-inch Robit 181 from the local Robit dealer in Queensland, Dilong Drilling, with whom Lucas Drilling had already successfully collaborated for several years. Angus Simmons, Drilling Supervisor at Lucas Drilling, describes the operation as follows:

“We’ve used our Robit Hyper 181 DTH hammer in a Schramm T130XD drill rig for more than fifty jobs now without a single problem. Some time ago we upgraded our equipment with new Robit Hyper 181 DTH hammers and we’re now using them also in a Schramm 685 rig. We use the Hyper 181 model for hard and brittle basalt and other volcanic types of rock down to depths of 64 metres.”

After that, a 14” DTH hammer will go further down to 200– 220 metres to reach conglomerate of ancient petrified gravel. Finally, a 9” DTH will hammer away the rest, at a depth of between 220 and 240 metres.

AJ Lucas Group, listed on the Australian Securities Exchange (ASX), has more than 60 years of experience in the sectors of energy, water & waste water, resources and public infrastructure. Headquartered in Brisbane, Lucas Drilling has broad experience in engineering services, horizontal directional (HDD) drilling, drilling for oil, gas and coal, surface-to-inseam (SIS) drilling and many other areas of special expertise, making them one of Australia’s largest and most diversified drilling service suppliers.

Dave Crane, sales coordinator with Robit, spared no praise for the quality of work at the Narrabri North mine:

“The workmanship at the mine is solid testimony of Lucas Drilling’s know-how and experience, of Dilong Drilling’s technical support and special expertise as well as of the power and reliability of the Robit Hyper 181 DTH hammer. It’s truly a winning combo!”

Picture: The Schramm drill rig uses three different-sized hammers and drill bits for drilling a 240-metre-deep hole. Lucas Drilling Services relies on Robit’s DTH drilling equipment in demanding conditions.

AUSDRILL’S SUCCESS STORY – “Blood, sweat and tears”

Posted on by Jari Silver

Developing DTA’s drilling consumables to their current level of excellence was a long and hard learning curve. Looking back, it was all well worth it. These days Ausdrill is the one to raise the standards to its competitors.

David Hart, Area Manager at Ausdrill Ltd, recalls being one of the first customers to use DTA’s products:

“When I look back on the whole process, I realise now that this could not have been done without some ‘blood, sweat and tears’, and also not without close co-operation between Ausdrill’s and DTA’s personnel. The tight relationship between Ausdrill and DTA was a stroke of luck! DTA was able to make improvements and changes to the products on short notice, and Ausdrill was able to trial those changes just as fast. This made the whole experience less painful than it could have been. There was some frustration, but also satisfaction along the way to producing and developing a product that today will hold its own against the competition. It was a great learning experience!”

At the Super Pit operation we are required to drill approximately 190,000 metres per month. The size and depth of the holes vary, as does their purpose; we have 20,000 metres of grade control holes, 50,000 metres of probe holes and the remaining 120,000 are blast holes. Grade control holes are designed to define the ore body boundaries within each bench prior to blasting. The blast holes are loaded with explosives and the blast fractures the soil into pieces suitable for loading and hauling. Probe holes are designed to define the border
between safe ground areas and potentially unsafe areas, where old underground workings are present.

“Prior to Kalgoorlie becoming the ‘Super Pit’ in the late 1980s, there were many different gold leases owned by different prospectors and lease holders in the area. The majority of the individual gold operations across the Golden Mile (now the site of the Super Pit) were underground operations. The combined length of the underground workings is over 2,000 kilometres, and the size of each mine varies according to the era and methods used at the time. In the 20-plus years that Ausdrill has been working in the Super Pit, I know of one case where a drill rig partly fell into some old underground workings. It couldn’t be retrieved, so it was blasted and dug up with the rock. The operator survived the incident,” Hart says.

Ausdrill uses DTA products at all of their 10 drill and blast sites in Australia and also on some exploration division drill rigs. The most common products are the 4- and 6-inch blast hole hammers and bits used for drilling holes from 115 through to 165 mm. We additionally use a few 7- and 8-inch hammers for drilling hole sizes from 203 to 251 mm and reverse circulation hammers for grade control and RC exploration.

The manufacturing business in Australia is very challenging financially, and many companies have either left Australian shores and set up in India or China to reduce their costs or closed up shop altogether.

“Continuous improvement will be required to keep DTA’s products in the markets and to meet the competition headon,” Hart believes. “A lot of competition stems from the price dumping due to hand-made products from China and India.”

DTA uses robotic machines to contain labour costs, while still maintaining high reliability and proven quality in production. While it is apparent that more and more competitors are entering Ausdrill’s market, the company is determined to stay focused and have fun along the way. It is “cost per metre and reliability” that will win out in the end, Hart concludes.

Picture: KCGM Kalgoorlie Super Pit – Ausdrill has been the production drilling contractor at the Super Pit for many years.

Uptime – from necessity to opportunity

Posted on by Jari Silver

Uptime Earthmoving Solutions Inc. (Uptime) was established in 2016 by engineers and technical people of Delta Earthmoving, Inc. a leading contractor in the Philippines specializing in earthmoving, quarrying and mining.

Delta was executing nine quarrying contracts and one major open pit mining contract, extracting a combined 4.5 million metric tonnes of materials per month, each one requiring drilling operations. Mr. Geoffrey Omengan, Delta’s EVP for asset management then observed that in spite of the operations’ results showing the obvious cost efficiency of Robit products over other brands, the company continued to use an assortment of brands. With this observation, Mr. Omengan envisioned not only expanding the utilization of Robit products but also distributing the brand in the Philippines. Not only would sustainable drilling solutions be provided to Delta but business opportunities would also arise in distributing products which have shown a distinct advantage over other brands based on actual applications. Thus, Uptime
was created with Mr. Geoffrey Omengan at the helm.

On the other end, Binn Lim, Export Manager of Robit Korea, had been waiting for years for the opportunity to introduce the Robit brand to Delta. As fate would have it, Mr. Lim and Mr. Jimmy Omengan, a director of Delta, crossed paths during the Bauma Expo in Munich, Germany in 2016. The two did not waste time discussing the availability of Robit products in the Philippines, which quickly graduated into Uptime’s possible dealership and distribution of Robit products. This would pave the way for further discussions between the two parties and as the adage goes, “the rest is history”.

Less than a year from its establishment, Uptime has gained tremendous momentum in developing Robit as a major player in the Philippine market. The use of Robit products has expanded beyond Delta to other drilling contractors. Furthermore, Uptime was able to confidently conduct drill testings for several significant players in the Philippine mining industry. The results have been encouraging and Uptime foresees a significant growth in the market for Robit.

Picture: Rusialda (Uptime), Binn Lim (Robit Korea), Bryan Lumongtad (Uptime).

Robit puts down roots in the Middle East

Posted on by Jari Silver

In late 2016, Robit took a step to expand its foothold in the Middle East by establishing a sales company (Robit Plc – BFC) in Dubai, the largest city in the United Arab Emirates. The new sales company is led by Export Manager Juhani Sivenius.

What are the starting points for the operations in the Middle East?

Considering the size of the market, Robit’s sales in the area have been modest to date. The journey is only just beginning. We are currently focussing on presence to enhance visibility, and on availability, which is indispensable for growth. So we have a lot of footwork to do. We have achieved a few successes, which creates a good foundation for the future.

Tell us more about the successes!

Stevin Rock, the area’s largest quarry located in Ras Al-Khaimah, is my customer. Robit has a two-year agreement for the supply of wear parts for their entire DTH line. Drilling in Tel Aviv’s metro tunnel project in Israel will start during the summer using our forepoling tubes. The Turkish market is already looking good, thanks to my colleague.

What is Dubai like as a business environment?

The culture is quite colourful because of the wide variety of nationalities. Taking care of administrative matters can be a little slow and bureaucratic, but you get to used to it. My goal is to turn the operations in the area around as soon as possible by acquiring end customers and expanding the distributor network.

Picture: Cliff McGowan (DTARobit) giving instructions to Bharadwaj Ventaraman (Delta Corp Global, right).

Granite – From the Bottom of the Pit to America’s Rooftops

Posted on by Jari Silver

Harvey, Irma, Maria – familiar names to all of those who watched the news on the hurricanes wreaking havoc around the Gulf of Mexico in 2017. As unlikely as it may seem, they are part of the reason why the drillers in a granite quarry in Arkansas are quite busy these days.

“I was introduced to Robit’s CEO at the Conexpo trade show in Las Vegas. I had a really good first impression of him and we got along good. We were having excessive wear of bits, chucks and hammers at our Arkansas site because of the material we were drilling. Robit said they could help us with that, so I decided to give them a try. It turned out my drilling foreman George Aday had already tested Robit tools, but as he had been buying them through a distributor, he had found the prices too high. Sometime after Conexpo, I visited the new Robit factory in Sherman, Texas and placed a first order for DTH hammers and bits. At first, we had some bits that did not work so good, but Robit did some redesign based on our feedback. Ever since, their products have worked better than anything we have used before. I would say we are very happy with Robit products and service as well.”

Dane Braden
President, Explosive Contractors, Inc.

Asphalt shingle is the most popular roofing cover in the United States – it’s relatively easy to install and not very expensive. The base mat of the shingle is saturated with asphalt and the top surface is coated with mineral granules. These granules add durability and protect the asphalt from the deteriorating effects of ultra-violet radiation. They also give the shingles their colour.

However, when a hurricane strikes, no amount of granules will protect a roof unless it’s carefully stormproofed. Each year, thousands of roofs in the hurricaneprone areas in South-Eastern US are damaged, if not entirely ripped away, by storms. This has boosted the production of roofing shingles and, consequently, the demand for mineral granules in the area.

Small clouds of grey dust rise from the ground as Justin Brandt operates the drill in his orange-red rig in a granite quarry in central Arkansas. He drills 5.75“ (14.6 cm) holes that go 14–15 metres deep into the hard rock. Later, the holes will be loaded with explosives and detonated; the blasted rock will then undergo a two-stage process of crushing and grinding, finally resulting in granules about 2 mm in diameter – the perfect coating material for asphalt shingles.

The orange-red drill rig belongs to Explosive Contractors, Inc. (ECI). Besides Arkansas and their home state Missouri, ECI operates dozens of drilling and blasting jobsites in Kansas, Illinois, Wisconsin, and Oklahoma, employing a fifty-strong regular staff and a large number of subcontractors.

Rich in quartz and thus very hard and abrasive, the Arkansas granite is a true challenge for any rock tool. Drill bits and hammers tend to wear out quickly. “Every time we need to shut down the machine to change bits, we lose production”, says Dane Braden, President and owner of ECI.

Recent months have seen a remarkable increase in production at the Arkansas site: replacing their previous Down-the-Hole drill bits and hammers with Robit tools has really made a difference for ECI. This did not happen overnight though: it required some testing, analysis, and product improvement by Robit until the optimal set of tools was developed. Today, the hammers are drilling up to twice as far as the previous ones.

This sounds like good news for all the other granite quarries in the area as well.

From left: Owner of ECI Dane Braden, his Drilling Foreman George Aday and Safety Manager Sam Crutcher

The Sense System goes to Java

Posted on by Jari Silver

Drill hole deviation is a problem most mining operations have had to deal with – until recently. Robit’s groundbreaking Sense System product line was created to address this issue. It has been extensively tried and tested in quarries and mines around the world, now including Indonesia.

In gold mines, blast hole sampling – analysing rock cuttings extracted from the drilled holes – is a common method of exploring ore grades. Accurate sampling allows for identifying ore zones and waste rock zones, which is essential for efficient mine planning.

Usually you have to settle for two dimensions when plotting the blast zones from sampled data. Also, the deeper you drill, the more the hole tends to veer off from its desired direction. Because of this drill hole deviation, you may end up with inaccurate sample data.

These are familiar problems at the gold mine owned by Bumi Suksesindo in Banyuwangi, East Java, Indonesia. That’s why the mining contractor and the blasting contractor at the site welcomed the opportunity to test Robit’s M-Sense system with PT. Marton, Robit’s distributor in Indonesia.

“We found that the M-Sense helped improve ore grade sampling. Normally you plot blast zones using two-dimensional data, but thanks to M-Sense, you get an instant 3D view of the drilled hole in the drilling pattern on a tablet screen. Any deviation from ore zone to waste rock zone is easy to spot”, explains Sales Manager Frandy Widjaja from PT. Marton.

“Also, when you can measure drill hole deviation, you can avoid overcharging the blast holes, which improves safety in a free-face area”, Frandy adds.

The M-Sense system has also been tested at a cement mine in Citereup in West Java, with equally promising results. “At both sites we have received great feedback from the test teams: M-Sense is simple to use, light-weight, and easily operated by one person. That saves a lot of time and hassle in the measuring process”, Frandy concludes.

Picture: The test team at Citereup, from left: Benny Sofyan, Wijaya Surio, Frandy Widjaja (PT. Marton); Ronaldo Indra Putra,Andry Kurniawan (PT. Indocement); Sunyong Choi, Binn Lim (Robit Korea)

Setting new performance standards in Phalaborwa

Posted on by Jari Silver

There are hardly many mining sites in the world where you can see herds of elephants and buffalo roaming about. At the mining complex in Phalaborwa, right next to the mighty Kruger National Park in the northeast corner of South Africa, that sight is commonplace.

The vast Phalaborwa complex is host to several valuable minerals such as phosphate, copper, zirconium, iron, and vermiculite. Phosphate is a key mineral in fertilizers. Before the foundation of the Phalaborwa mine in 1951, the South African agriculture was dependent on imported phosphate rock. Today, South Africa exports phosphate fertilizers around the world.

Venter Drilling, a local family business, has been the drilling contractor at the site for some ten years. In early 2018 they were contacted by Robit SA with a proposal to test Robit’s DTH bits and hammers. Not being completely satisfied with the products of their then supplier, the owner of Venter Drilling, Pieter Venter, agreed to have a testing programme arranged. This was a win-win deal, as it would also provide Robit with genuine feedback on their products.

The first test run involved ten DTH bits and a DTH hammer. “On the outset we wanted to achieve 800 metres per bit and 8,000 metres per hammer”, says Len Botha, who does business development for Robit SA. “In the initial test, the hammer reached 10,767 metres. The bits reached an average of 1,198 metres, with the best one drilling down to 1,699 metres. The previous supplier had averaged only 811 metres per bit”, Len recounts.

This was, of course, extremely promising, but to thoroughly convince Pieter Venter, another set of tests was arranged. This time the hammer went on to do over 12,000 metres. The bit performance was consistent with the first tests.

“Robit tools managed to reduce the overall bit cost by 32 %. This was mainly due to the DTA type of design that we introduced: 18 mm buttons on the peripheral and 16 mm on the inside, with the three centre flushing holes”, says Len.

Phalaborwa holds reserves of some 2.5 billion tonnes of phosphate rock, or five percent of known world reserves. That means the elephants and buffalo will be continuing their friendly co-existence with the miners for quite some time in the future.

Taking ground in the Brazilian quarry market

Posted on by Jari Silver

Concrete is the most versatile and most widely used material for construction. In a typical concrete mix, as much as 60% to 80% of it consists of aggregates. Aggregates for the construction industry are the most consumed mineral inputs in the world – including Brazil.

“In Brazil, extracting aggregates is a key activity in the mining sector. The recent economically lean years saw a reduction in production volume, but the economy is now recovering step by step. This applies to the aggregates market as well – and Robit found an important partner to help advance our growth strategy in the country”, says Alexei Albuquerque, Distributor Business Manager for Robit in Latin America.

Paraná Drill was founded in 2001 to serve the quarry market with equipment, parts and consumables. Based in Curitiba, the capital of Paraná state, the company covers the south states of Brazil.

“I’m always looking for quality products with a good reputation. Knowing that Robit was searching for a new distributor for this market, I approached them Taking ground in the Brazilian quarry market and introduced Paraná Drill and our operation in the segment”, says Fabiano Buffon, the President of Paraná Drill.

“We then organized a test in our quarry to learn how Robit’s tools would perform. I had a really good first impression of them and the results were positive, as we’d expected. We are happy with the performance of Robit’s tools and the support their team provides”. Today Paraná Drill is a recognized company in the quarry market, especially in southern Brazil. The market has great growth potential but also faces challenges.

“In addition to contending with our competitors, we need to deal with import duties, long-term customer financing and great variation in exchange rates. Having a partner with cost-effective high-quality products certainly helps”, Fabiano Buffon concludes.

Picture: Mikko Vuojolainen, VP, Robit Americas (left) and Fabiano Buffon, President, Paraná Drill

Introducing HEAVY DUTY AUSTRALIAN drilling consumable solution available worldwide!

Posted on by Jari Silver

GET MORE LIFE FROM YOUR DRILLING CONSUMABLES –

DTARobit heavy duty drilling consumable solutions are available globally for mines and quarries. Our DTARobit products are Australian engineered solutions designed by drillers for drillers. These mining focused hammers are widely used at major mining houses and are the preferred choice of drillers for their DTH blasthole and RC drilling programmes. Products have been optimized through years of close co-operation with our clients resulting in higher productivity, more drilled meters and therefore overall reductions of costs in their operations.

Please read more: DTARobit Heavy Duty Series 2017