About Us

Henan LIMING Heavy Industry Science and Technology Co. LTD which mainly manufacture large and medium-sized crushing and grinding equipments was founded in 1987. It is a modern joint-stock corporation with research, manufacturing and sales together. The Headquarter is located in HI-TECH Industry Development Zone of Zhengzhou and covers 80000 m ². Another workshop in Shangjie Industry Park covers 67000 m ². Over the more than 30 years, our company adheres to modern scientific management system, precision manufacturing, pioneering and innovation. Now LIMING has become the leader in domestic and oversea machinery manufacturing industry.

120

million

cubic meters

Industrial chain production base

70

national patents

689sets

national patents

170

Equipment service country

Company Culture

core values of the company

Create Value

Share Value

Observe Order

Respect Value

Service philosophy

Religious, fine, tight, and harmonious

LIMING spirit

Standardization, value, serialization, and differentiation will always exceed our contract

Brand Concept

Create and promote civilization, refine and interpret brilliantly

Business philosophy

Religious, meticulous, rigorous, and harmonious work

Our Global Footprint

Case Scene

Blasting Drilling of Open Pit Mining - Hardrockdrills

23/10/2018  Big Top Hammer Drill Rigs up to depth 30m and hole diameter 175mm; Big Down The Hole Drilling Rig up depth 30m and borehole diameter 200mm; Big Rotary Drill Rigs up to depth 50m and hole dia. 300mm; Aspects of Open Pit Mining. Stability

What Is Used For Drilling In An Open Pit Mine

1 –In an open pit operation a rotary drill is used to drill holes ... Open Pit Mining 2012.pptx. Read more

Open-pit mining - Wikipedia

Open-pit mining, also known as mega-mining, open-cast or open cut mining, is a surface mining technique of extracting rock or minerals from the earth by their removal from an open-air pit, sometimes known as a borrow. This form of mining differs from extractive methods that require tunnelling into the earth, such as long wall mining. Open-pit mines are used when deposits of commercially useful ore or rocks are found near the

Everything You Need To Know About Open Pit Mining ...

01/11/2018  In most cases, water control is important to prevent the mine pit from turning into a lake. The mine becomes vulnerable if it is located in an area susceptible to heavy rainfall and/or large amounts of precipitation. Open pit mining is an operation that relies on digging an open pit as an effective way of accessing the desired ores and materials. It is a method of mining the Earth's surface to extract

What Is Used For Drilling In An Open Pit Mine

What Is Used For Drilling In An Open Pit Mine Manganese ... Read more. Open Pit Mining Equipment - Vikay Mining Equipments. Vikay Is a worldwide supplier of Open Pit Mining Equipments from India for Marble granite drilling, Construction and Surface Mining Applications. Read more. KY310A Blast hole drilling rig for open pit mine - YouTube . This video is taken in Tangshan Metal Ore open pit ...

Open-Pit Mining Methods - 911 Metallurgist

09/04/2017  Open-pit mining methods are applicable to mining ore deposits that apex at or near the surface. If the deposit apexes below the surface, the overburden and barren capping overlying the ore must be removed in advance of open-pit mining. The removal of this material is known as stripping. The stripping-pit limits must be extended beyond the limits of the ore pit to provide a bench, and the pit ...

Open-pit Mining - Mining North Works

Open pit mines may be circular, like the ones shown pictured at the Ekati mine, or oblong, and include several mining levels know as benches. Roads, known as ramps, allow access to the orebody. The size and depth of an open pit is a balance of how much worthless waste rock must be mined to gain access to the valuable ore. The size of the first bench is critical as each subsequent bench is ...

Types of Drilling Methods used in Mining Boring Mining ...

During drilling a steel pipe is used for lining the drill hole from surface upto the hard rock, and the drilling tool and rods pass through the pipe. Obviously, the length of the drill-hole upto which the lining pipe has to be fitted should be of a larger diameter. The lining pipe is generally withdrawn after the hole is completed though it may sometimes be necessary to leave it in its ...

Open Pit Mining - an overview ScienceDirect Topics

An open pit mine is typically excavated with a series of benches to reach greater depths. Open pit mining initially involves the removal of soil and rock on top of the ore via drilling or blasting, which is put aside for future reclamation purposes after the useful content of the mine has been extracted. The resulting broken up rock materials are removed with front-end loaders and loaded onto ...

Optimized design of drilling and blasting operations in ...

01/11/2018  Drilling and blasting are the two most significant operations in open pit mines that play a crucial role in downstream stages. While previous research has focused on optimizing these operations as two separate parts or merely in a specific parameter, this paper proposes a system dynamic model (SDM) for drilling and blasting operations as an interactive system.

Open pit mining Epiroc

22/05/2016  The Kevitsa Mine in Finnish Lapland, 130 km inside the Arctic Circle, continues to develop with Atlas Copco equipment. Among the latest acquisitions are two Pit Viper 271 drill rigs which are now in full operation. Detour Lake is the flagship gold mining operation of emerging mid-tier gold producer, Detour Gold Corporation.

Surface Mining Techniques used in the Oil Sands Oil ...

01/05/2016  Oil sands mining operations are some of the largest mines in the world. Although open-pit oil sands mines have a lot in common with traditional hard-rock mines (such as gold or copper), oil sands operators have some unique challenges due to the softness of the deposit. Learn more about surface mining techniques used in the oil sands.

Surface mining planning and design of open pit mining

09/01/2016  So the overall pit slope is lesser the inter-ramp slope. In the example, almost 50% more tonnage must be moved to mine the same pit bottom. In the early design of a pit a lesser pit slope can be used to allow for the road system. The pit in Fig. 5 was designed with an overall slope of 380. The overall slope to use will depend on the width, grade, and anticipated placement of the road. Fig. 6 ...

I am an open pit mine geologist for a gold producing

My main job is to use information from RC drilling, blast hole sampling and historical exploration drill results to produce a block model of the deposit, which in-turn, is used to create ore polylines of the blasted material. Once this block is created, I have to make sure that the mine operations dig the blocks correctly. So overall, I spend about half my day in the pit and half my day in the ...

Horizontal Drains – Their Use in Open Pit Mine Dewatering

Horizontal drains are one method which may be used for open pit mine dewatering. These devices consist of horizon­ tal holes which usually, but not necessarily, have slotted PVC screen or pipe placed in them. They are used to drain slope embankments or water-storing strata behind an imper­ vious embankment. Further, they may be used underground to assist drainage galleries or shafts placed ...

MINING EQUIPMENT NAMES - List of mining

30/06/2019  Open pit mining is the most common mining technology when it comes to new mines. In this technique, the soil is excavated and the mineral separation and the remaining soil material occurs on the surface. The first step in this process is the extraction of the ore (beta with high mineral grade).

Open Pit Mining - an overview ScienceDirect Topics

An open pit mine is typically excavated with a series of benches to reach greater depths. Open pit mining initially involves the removal of soil and rock on top of the ore via drilling or blasting, which is put aside for future reclamation purposes after the useful content of the mine has been extracted. The resulting broken up rock materials are removed with front-end loaders and loaded onto ...

Surface mining planning and design of open pit mining

09/01/2016  So the overall pit slope is lesser the inter-ramp slope. In the example, almost 50% more tonnage must be moved to mine the same pit bottom. In the early design of a pit a lesser pit slope can be used to allow for the road system. The pit in Fig. 5 was designed with an overall slope of 380. The overall slope to use will depend on the width, grade, and anticipated placement of the road. Fig. 6 ...

Evaluation and Risk Analysis of Open-Pit Mining

10/04/2019  In-pit crushing and conveying (IPCC) is used to transport the blasted rock mass out of the pit by breaking it into smaller pieces with a crusher and hauling it with a conveyor belt. In comparison, haulage can be done transporting the rock mass with truck fleets. Advantages and disadvantages of both systems must be compared for several criteria to guarantee optimum choice. Open-pit mining ...

Open pit mining Epiroc

22/05/2016  The Kevitsa Mine in Finnish Lapland, 130 km inside the Arctic Circle, continues to develop with Atlas Copco equipment. Among the latest acquisitions are two Pit Viper 271 drill rigs which are now in full operation. Detour Lake is the flagship gold mining operation of emerging mid-tier gold producer, Detour Gold Corporation.

Risk assessment workbook for mines

be used instead of an appropriately designed safety management plan for each individual mine. Users should rely on their own advice, skills and experience in applying risk and safety management systems in individual workplaces. Use of this document does not relieve the user (or a person on whose behalf it is used

I am an open pit mine geologist for a gold producing

My main job is to use information from RC drilling, blast hole sampling and historical exploration drill results to produce a block model of the deposit, which in-turn, is used to create ore polylines of the blasted material. Once this block is created, I have to make sure that the mine operations dig the blocks correctly. So overall, I spend about half my day in the pit and half my day in the ...

Optimisation grade control procedures at the open pit ...

A large Copper open pit mine in Chile has lost US$134 million over a 10-year period because of suboptimal grade control procedures based on the blast holes sampling. It was estimated by the difference between actually used blast hole sampling protocol and its optimized version. (P. Carrasco: WCSB1, Denmark 2003) Grade control at open pit mines Sampling grid : Sample quality : Grade

ON-BENCH PRACTICES FOR OPEN CUT MINES AND QUARRIES

significantly across open cut coal operations, open pit metal mines and quarries, and . Edition 1 November 2015 Australian Explosives Industry and Safety Group Code of Practice: On-Bench Practices for Open Cut Mines and Quarries Page 3 . therefore, a review of these guidelines must be carried out for applicability on a site-specific basis. In the event of any conflict between this Code and ...

Open-pit Mining - Mining North Works

Open pit mines may be circular, like the ones shown pictured at the Ekati mine, or oblong, and include several mining levels know as benches. Roads, known as ramps, allow access to the orebody. The size and depth of an open pit is a balance of how

Surface Mining Techniques used in the Oil Sands Oil ...

01/05/2016  Oil sands mining operations are some of the largest mines in the world. Although open-pit oil sands mines have a lot in common with traditional hard-rock mines (such as gold or copper), oil sands operators have some unique challenges due to the softness of the deposit. Learn more about surface mining techniques used in the

List of Equipment Used in Opencast Coal Mining Mining

Wagon Drill. A jack hammer, so familiar to mine workers, is a hand-held and unmounted drill used for vertically downward drilling. It weighs from 15 to 25 kgf and is used for drilling upto a depth of 2 m (rarely 3 m); hole dia. is generally 30 to 37 mm and rarely 50 mm. In a few cases a jack hammer may be mounted on an air leg. Though ordinary ...

6 Types of Machines and Tools Used In the Mining Industry ...

25/04/2020  Blasting tools are used for both open pit mining and underground operators. However, it is one of the most hazardous machines. Good blast designs are very important for mining operations as too many explosives would cause significant damage to the rock structure which would cause unwanted caving. Earth Movers; Loose earth and soil are carried out by earthmovers. They are used in the

Glossary of Mining Terms - SEC

Rotary drill - A machine that drills holes by rotating a rigid, tubular string of drill rods to which is attached a bit. Commonly used for drilling large-diameter blastholes in open-pit mines. Royalty - An amount of money paid at regular intervals by the lessee or operator of an exploration or mining property to the owner of the ground ...

ON-BENCH PRACTICES FOR OPEN CUT MINES AND QUARRIES

significantly across open cut coal operations, open pit metal mines and quarries, and . Edition 1 November 2015 Australian Explosives Industry and Safety Group Code of Practice: On-Bench Practices for Open Cut Mines and Quarries Page 3 . therefore, a review of these guidelines must be carried out for applicability on a site-specific basis. In the event of any conflict between this Code and ...

Advantages and disadvantages of open pit mining –

What is open pit mining . Open pit mines are those mining operations that take place on the surface , unlike the underground mines. This is possible when the reservoir sprouts on the surface or at a very small depth. It began to be realized in the middle of the XVI century and it is used all over the world. In order to be carried out, the excavation (using machinery or explosives) of the lands ...

Environmental Consequences of Open Pit Mining

14/03/2012  Open pit/open cast miining techniques are also frequently used to produce precious and semi-precious metals, especially, copper, silver, and gold, in developed as well as developing nations. Examples include the Bingham Canyon Copper Mine (also known as the Kennecott Mine) southwest of Salt Lake City, Utah; Chile’s Chuquicamata Mine, the world’s largest open pit copper mine and the

Pit Terminology - Mines Rescue

I have also used 'A Pit Terminology ... Mine drivers would drill holes in the rock and use explosives to blow it down. Mine Gases - Mine Gases. During the normal working of coal seams it is necessary to pass through the workings a sufficient quantity of air to keep the atmosphere properly conditioned for breathing, because of the fact that firedamp is slowly exuded by the coal and surrounding ...

What is the difference between shaft mining and open-pit ...

There is nothing called Shaft mining. Shaft sinking is the term for accessing mineral deposits present deep inside the earth. In this process, a shaft is being driven in the middle or side of the ore. in underground mining where the access is thro...