Conventional Coal Mining Method

Types of Underground Mining Method Comparison

In any discussion of Methods of Underground Mining Comparison, one is repeatedly confronted with the difficulty of dealing with so many variable conditions. It is not an exact science and in the choice of a method each varying factor has a certain weight, which, in many cases, experience alone can determine. In mathematical terms, it is a ...

Conventional mining vs surface miners - Mining Mirror Online

Several opencast mining operations are looking at using surface miners rather than conventional mining methods to unearth coal deposits. ... fuel consumption is about 79% lower — and therefore also CO 2 emissions — with surface miners than when using the conventional method.

The Principle of Longwall Top Coal Caving (LTCC) - YouTube

30/4/2015· Caterpillar has extensive experience in the design of roof supports for specific mining conditions. Cat Longwall Top Coal Caving (LTCC) roof supports allow mining of seams seams thicker than 6 ...

Coal mining - Choosing a mining method | Britannica

Coal mining - Coal mining - Choosing a mining method: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting a coal seam depends on many technological, economic ...


10/11/2017· Mining In Minnesota - Cut and Fill Mining Method 3D Animation - Duration: 6:36. ... The Principle of Longwall Top Coal Caving (LTCC) - Duration: 3:58.

Coal mining - Underground mining | Britannica

Coal seams as much as five metres thick can be mined in a single “lift” by the longwall method, and seams up to seven metres thick have been extracted by conventional mining systems in one pass. However, when a seam exceeds these thicknesses, its extraction usually involves dividing the seam into a number of slices and mining each slice with longwall, continuous, or conventional mining ...


coal mining methods, ... Auger mining is a relatively low cost method of coal mining and is practical in ... seams up to seven metres thick have been ext racted by conventional mining system s in ...

Coal Mining Methods - Colorado School of Mines

Coal Mining Methods Underground Mining Longwall & Room and Pillar Mining Longwall mining and room-and-pillar mining are the two basic methods of mining coal underground, with room-and-pillar being the traditional method in the United States. Both methods are well suited to extracting the relatively flat coalbeds (or coal seams) typical of

Appendix F: Underground Coal Mining Methods and ...

In both methods, the coal seam is developed by driving entries and cross-cuts to create blocks or pillars of coal by the room-and-pillar method. In the past, separate machines were used for cutting, drilling, blasting, and loading the coal and the method was called conventional room-and-pillar mining.

Underground Mining Methods and Equipment

section describes underground mining equipment, with particular focus on excavation machinery such as boomheaders, coal cutters, continuous miners and shearers. 1. Underground Mining Methods 1.1. Classification of Underground Mining Methods Mineral production in which all extracting operations are conducted beneath the ground

Longwall Top Coal Caving | Introduction | underground COAL

Longwall Top Coal Caving. Longwall top coal caving (LTCC) is a special type of longwall mining applicable to very thick seams (greater than 4.5m) where good quality coal is being left because "conventional" longwall equipment has not yet been designed to operate successfully beyond around 5m mining height.

Surface Mining Methods and Equipment

expensive surface mining method. Highwall mining is a coal mining method for recovery of outcropped coal by mechanical excavation without removal of overburden. A continuous miner with single or multiple augers/cutting heads is operated underground and controlled remotely by …


blasted coal and transporting to conveyors. After successful extraction in three panels the new method was replicated in Chora Colliery of ECL. Coal recovery was found to be about 70% in the panels, which was substantially higher than what was possible through conventional means. The output per man-shift [OMS] was also substantially higher at 2 ...

Room and pillar mining - Wikipedia

Retreat mining (below) is an example of a process like this. Retreat mining. Retreat mining is often the final stage of room and pillar mining. Once a deposit has been exhausted using this method, the pillars that were left behind initially are removed, or "pulled", retreating back towards the mine's entrance.

Conventional mining | Article about conventional mining by ...

Alternative mining pilot tests in narrow veins: The Company is currently carrying out pilot testing of mining methods for narrow veins, using the sublevel stoping and conventional mining cut and fill methods, in order to determine the optimal mining method for these types of structures.

Longwall Mining Method and Design

Historically, room-and-pillar mining has dominated coal production, and this mining method has been the focus of most multiple-seam research. Advances in Longwall Mining Method have made this system more economically attractive because of its efficiency and production potential. ... Conventional Longwall Mining Approach.

A new mining method

A new mining method 04 Introduction The mining methods used in open cut coal strip mining in most major coal producing countries have been well established and fairly consistent over the past few decades. These general mining practices have been described by Kukla et al. (1993) and Aspinall et al. (1993) amongst others.

Room and Pillar Mining Method - SlideShare

Room and Pillar Mining Method 1. Hassan Z. Harraz [email protected] 2014- 2015 This material is intended for use in lectures, presentations and as handouts to students, and is provided in Power point format so as to allow customization for the individual needs of course instructors.

Major Mines & Projects | Impunzi Mine - Mining Industry Data

Currently all major opencast mining is undertaken using the strip mining method with draglines. All hard overburden (shale/sandstone) and coal is blasted using bulk explosives (heavy ANFO emulsion). The coal is transported by truck to the Crushing and Pillar Screening Plant.

How is coal mined? - Quora

Thanks for A2A ! The selection of process for mining the coal deposit is attributed to various parameters, among those , the important ones are :- 1. Dip of the coal deposit. 2. Presence of geological discontinuities. 3. Capital available. 4. Dept...

(PDF) Mining Methods: Part I-Surface mining

Mining Methods: Part I-Surface mining. ... Open pit Mining method. 2 February 2016 Prof. ... T ypical example s of this type of mining are the larger tonna ge coal mining operations in Mpumulanga.

Table 22. Underground Coal Mining Productivity by State ...

Table 22. Underground Coal Mining Productivity by State and Mining Method, 2018 (short tons produced per employee hour) Coal-Producing State, Region1 and Mine Type Continuous Conventional and Other2 Longwall Total Alabama 2.21 - 2.38 2.27 Colorado 4.68 - 6.03 5.77

Coal Mining and Processing - The National Academies Press

A lthough the United States has the vast coal resource described in the previous chapter, perhaps as much as 4 trillion tons, the key issue for policy makers is the amount of coal that is economically recoverable. This is not a fixed quantity, but depends on the geological resource, the market price, and the cost of mining.

Conventional Mining - ScienceDirect

Conventional coal mining - in the sequence of present importance - is known according to three types, namely, underground mining, opencast mining and auger mining or direct bore hole mining. The choice between the different methods is generally made on the basis of economic considerations.

Surface Coal Mining Methods in Australia - InTech

Surface Coal Mining Methods in Australia 5 2. Open cut mining methods strip mining Large-scale open cut coal mining operations commenced in Australia in mid 1960s and since then there has been significan t developments in this method of mining. The mines are now operating at significantly higher annual tonnages, growing deeper, more complex and

Coal Mining and Production

Surface mining (t/1000t coal produced) Underground mining (t/1000t coal produced) Mining Techniques Contour Area Conventional Longwall Liquid effluents 0.24 1.2 1 1.6 Solid waste 10 10 3 5 Dust 0.1 0.06 0.006 0.01 Source: Based on Edgar, 1983 * (Note: Local conditions will form the basis for choosing the appropriate mining method)

Design of Bord and Pillar method in coal mines

Design of Bord and Pillar method in coal mines 1. Design of BORD AND PILLAR method in coal mines AASHUTOSH CHHIROLYA B.TECH (MINING) 6TH SEM. AKS UNIVERSITY SATNA MP 2. INTRODUCTION The importance of mining is definitely significant to human civilization.

The optimization of mining method and equipment

The optimization of mining method and equipment R.G.B. PICKERING Sandvik Mining and Construction Conventional mining is an excellent match of mining method and equipment. The result is guaranteed performance. Change in the form of different technology requires change in mining method until the best match is achieved.

Table 13. Productive Capacity and Capacity Utilization of ...

U.S. Energy Information Administration | Annual Coal Report 2018 Table 13. Productive Capacity and Capacity Utilization of Underground Coal Mines by State and Mining Method, 2018 (thousand short tons) Continuous Conventional and Other1 Longwall Total Coal-Producing State Productive Capacity Capacity Utilization Percent Productive Capacity ...