underground coal mine drilling machine pdf

Research on Automatic Counting of Drill Pipes for Underground Gas ...

Research on Automatic Counting of Drill Pipes for Underground Gas ...

Gas explosions threaten the safety of underground coal mining. Mining companies use drilling rigs to extract the gas to reduce its concentration. Drainage depth is a key indicator of gas drainage; accidents will be caused by going too deep. Since each drill pipe has the same length, the actual extraction depth is equivalent to the number of drill pipes multiplied by the length of a single ...

(PDF) Ch. 74 / Techniques in Underground Mining TECHNIQUES IN ...

(PDF) Ch. 74 / Techniques in Underground Mining TECHNIQUES IN ...

The usage of coal in the Indian market scenario plays a vital role in power generation and other industries. The application of continuous miners in India coal mining could be a good choice for the improvement of coal production and productivity. Also, the utility of continuous miners' system in underground coal mining is appropriate technology.

PDF Application of Tunnel Boring Machines in Underground Mine Development

PDF Application of Tunnel Boring Machines in Underground Mine Development

and 70's in other underground mining operations (including coal mining in England). The penetration rates achieved by the machine in most of these projects were far above the capabilities of any drill and blast operation, yet overall tunneling costs could Application of Tunnel Boring Machines in Underground Mine Development

PDF Recognised standard 01 Underground electrical equipment and ...

PDF Recognised standard 01 Underground electrical equipment and ...

underground coal mine and electrical equipment and electrical installations on the surface directly associated with the underground operations of a coal mine. This standard does not apply to the general surface of an underground coal mine. 3 Application Framework

Appendix F: Underground Coal Mining Methods and Engineering Dust ...

Appendix F: Underground Coal Mining Methods and Engineering Dust ...

When the 1969 Coal Mine Health and Safety Act was enacted, coal production was about 600 million tons with about 60 percent underground mining and 40 percent surface mining. Longwall mining accounted for less than 1 percent of the underground production; roomandpillar continuous mining accounted for about 50 percent of the underground ...

(PDF) MECHANICAL ROCK BREAKAGE MACHINES ResearchGate

(PDF) MECHANICAL ROCK BREAKAGE MACHINES ResearchGate

Raise Boring/ Raise drilling is used in underground mining Operations to create ventilation shafts as well as ore passes. These ventilation shafts created by Rase Borers are circular in crosssection

Coal mining Underground mining | Britannica

Coal mining Underground mining | Britannica

Roof support at the face (the area where coal is actively mined) is intended to hold the immediate roof above the coal face. In modern mechanized mines, roof bolting is the most common method employed. Steel bolts, usually to 2 metres long and 15 to 25 millimetres in diameter, are inserted in holes drilled into the roof by an electric rotary drill and are secured by either friction or resin.

PDF Technical Review : Borehole Drilling and Rehabilitation Under Field ...

PDF Technical Review : Borehole Drilling and Rehabilitation Under Field ...

3 Methods of drilling boreholes 25 Common drilling methods 26 4 Drilling equipment 31 Choosing a drilling rig 31 Percussion drilling 32 Heavy duty cable tool 32 Rotary drilling 33 Drilling rig components 35 Drill bit 35 Hammer 36 Table of contents

PDF Research on Automatic Counting of Drill Pipes for Underground Gas ...

PDF Research on Automatic Counting of Drill Pipes for Underground Gas ...

Underground Gas Drainage in Coal Mines Based on YOLOv7GFCA Model Tiyao Chen *, Lihong Dong and Xiangyang She College of Computer Science and Technology, Xi'an University of Science and Technology, Xi'an 710600, China * Correspondence: yao7368 Abstract: Gas explosions threaten the safety of underground coal mining. Mining companies use

PDF Analysis of efficiency of drilling equipment use in mining operations

PDF Analysis of efficiency of drilling equipment use in mining operations

When developing coal and ore deposits by underground method, it is necessary to carry out a large volume of preparatory mine workings using drilling and blasting operations. Minerals are found in rocks under various conditions and their physical and mechanical properties change in a wide range.

Underground mining equipment manufacturers Mining machines, machinery ...

Underground mining equipment manufacturers Mining machines, machinery ...

Mine Master Ltd is wellknown and respected among mining equipment manufacturers. Thanks to many years of being a mining equipment manufacturer and thanks to the years of experience gained through working in the field, we are able to offer proffessional line of underground mining machinery using modern technology designed by our team of highly qualified specialists.

PDF Lecture Notes on Underground Coal Mining Osme

PDF Lecture Notes on Underground Coal Mining Osme

Method of winning coal in underground mines are classified into two main categories : 1. Bord and pillar (also known as pillar and stall) and its modification. 2. Longwall ... Volsafe machine for drilling at any angle is suitable for the purpose. 3. Depillaring below a waterlogged area should be avoided. Streams, rivulets, etc. on the

Mining Tools in 2022—A Guide to Mining Equipment and Mining Machines

Mining Tools in 2022—A Guide to Mining Equipment and Mining Machines

Here's a general list of mining tools and equipment: Miner tools —tools that miners carry on them, like pickaxe and chisels. Mining PPE —equipment that miners use to stay safe while working. Surface mining equipment —all the tools and mining machines used for surface mining.

Mining Equipment: AZ List for Maintenance Contractors

Mining Equipment: AZ List for Maintenance Contractors

Drill . A machine that uses a bit that rotates and hammers to make holes. If the hole size is over diameter the machine is classed as a borer. Drilling Jumbos. Used in underground mining if the method involves blasting. They are also used in tunneling in situations where the rocks are too hard for tunneling machines.

Rock characterization while drilling and application of roof bolter ...

Rock characterization while drilling and application of roof bolter ...

A real time drilling display system (DDS) for the Fletcher Co. HDDR dual head roof bolter for rotary roof bolting was developed and tested in the field (Collins et al., 2004).The study showed that a fairly accurate representation of void or separation locations in the mine roof can be determined from sensor data recorded during production bolting cycle.

PDF A Control Suite to Reduce Roof Bolting Machine Drilling Noise

PDF A Control Suite to Reduce Roof Bolting Machine Drilling Noise

roof. Fig. 2 shows a roof bolting machine in an underground coal mine. Prior underground timemotion studies confirmed that RBM operators are exposed to the highest noise levels when drilling as opposed to bolting, tramming, and other tasks associated with their typical work day 5. Therefore, an essential part of developing noise controls to reduce

(PDF) Drilling and blasting designs for parallel hole cut and Vcut ...

(PDF) Drilling and blasting designs for parallel hole cut and Vcut ...

Additionally, it is the only reliable product tested in underground coal mines in T urkey for mine gases (particularly methane) and coal dust 33 . Nevertheless, the compan y is allowed to use a ...

(PDF) Research on Drilling Depth Measurement Technology based on ...

(PDF) Research on Drilling Depth Measurement Technology based on ...

In view of the problem that the drilling depth is measured by manually counting drill pipes in the process of underground drilling construction in coal mine, combined with the multichannel sensor ...

PDF machine drilling noise1) Centers for Disease Control and Prevention

PDF machine drilling noise1) Centers for Disease Control and Prevention

Health (NIOSH) conducts research to reduce the noise emission of underground coal mining equipment, an example of which is a roof bolting machine. Field studies support the premise that, on average, drilling noise is the loudest sound level to which a roof bolting ... machine drill steel may exceed 500 g's, suggesting that this is the cause ...

(PDF) Research on Automatic Counting of Drill Pipes for Underground Gas ...

(PDF) Research on Automatic Counting of Drill Pipes for Underground Gas ...

Gas explosions threaten the safety of underground coal mining. Mining companies use drilling rigs to extract the gas to reduce its concentration. Drainage depth is a key indicator of gas drainage ...

(PDF) Underground Mining Project Equipment Selection Model ResearchGate

(PDF) Underground Mining Project Equipment Selection Model ResearchGate

Abstract and Figures. Underground mechanisation has not been that successful, because of nonavailability of imported equipment spares timely, difficult geomining conditions, mainly harder coal ...

Sensors | Free FullText | Algorithm for Automatic Rod Feeding and ...

Sensors | Free FullText | Algorithm for Automatic Rod Feeding and ...

The coal mining industry is crucial for the national economy [] but faces significant challenges [], including water damage control [].Conventional underground drilling operations in coal mines heavily rely on manual labor, leading to high safety risks and low productivity [].To overcome these limitations, researchers have focused on developing coal mine underground drilling robots [5,6,7].

Performance Evaluation of Underground Mining Machinery: A ... Springer

Performance Evaluation of Underground Mining Machinery: A ... Springer

In the underground mining segment, utilized equipment for transportation purpose,, load haul dumper (LHD), assumes an indispensable job in the accomplishment of the desired level of production rate. The recorded underground metal mine's production in India is not at a satisfactory level from the last few decades.

(PDF) Performance Evaluation of Underground Mining Machinery: A Case Study

(PDF) Performance Evaluation of Underground Mining Machinery: A Case Study

In this study, the performance of the underground mining machinery known as load haul dumper (LHD) has been estimated with reliability analysis. The bestfit distribution of the data sets was ...

A simulation experiment study to examine the effects of noise on miners ...

A simulation experiment study to examine the effects of noise on miners ...

Noise pollution in coal mines is of great concern. Personal injuries directly or indirectly related to noise occur from time to time. Its effects impact the health and safety of coal mine workers. This study aimed to identify if and how the level of noise impacts miners' safety behavior in underground coal mines. In order to study the influence of noise on miners in the mining industry, we ...

CDC Mining A Control Suite to Reduce Roof Bolting Machine Drilling ...

CDC Mining A Control Suite to Reduce Roof Bolting Machine Drilling ...

Among underground coal miners, hearing loss remains one of the most common occupational illnesses. In response, the National Institute for Occupational Safety and Health (NIOSH) conducts research to reduce the noise emission of various underground coalmining equipment, an example of which is a roof bolting machine.