1. Introduction. In coal mining activities, dust is generated by shearers and roadheaders mechanically crushing the coal, and then spreads to the whole working space, endangering the health of coal workers [[1], [2], [3]].Grasping the dust generation laws of different coal types is crucial for studying the laws of dust diffusion in the flow …

Coal worker pneumoconiosis results from the inhalation of dust generated by the drilling, blasting, or crushing of coal and by the equipment and processes used to extract coal. Exposures in coal mining are heterogenous, which contributes to a wide spectrum of disease in coal miners. The clinical manifestations of coal worker pneumoconiosis ...

As important equipment in the process of coal preparation, crushers can improve the crushing efficiency of materials as well as product quality [1,2].However, because of high belt speed, high throughput, and …

Methane emissions from coal mining are well studied and expected to reach approximately 784 Mt of CO 2-equivalent ... In addition, ore comminution processes (for example, crushing, grinding ...

9.3.1 Coal Jaw Crusher. This is used for crushing and breaking large coal in the first step of coal crushing plant applied most widely in coal crushing industry. Jaw crushers are designed for primary crushing of hard rocks without rubbing and with minimum dust. Jaw crushers may be utilized for materials such as coal, granite, basalt, river ...

Hammermills can be used as a primary crusher in many types of aggregate and industrial applications, including limestone, marble, shale, gypsum, phosphate, bauxite, aluminum dross, uranium, cryolite, clinkers, quicklime, petroleum coke, coal and more. Using a combination of impact, shear and attrition reduction methods, Hammermills tend …

KB Bradford drum crusher designed at th e KOMAG Institute of Mining Technology, presented in Figure 1, is the Polish equivalent of this type of equipment. Figure 1. Drum crusher KB 3200 × 6000 (view and section) [20]. Drum crusher s main component is a drum with a horizontal axis of rotation. Rota-

The coal particle fragmentation index was derived based on the relationship between coal crushing energy and coal internal gas energy. Also, it is concluded that there is a linear relationship between CES and the fragmentation index h. The slope of the curve fitting can represent the intensity level of coal particle ejection, and the intercept ...

Crushing plants are used both by aggregate producers and the mining industry. The overall crushed rock product production process can be improved by means of computer simulation and optimisation.

After mining coal reservoirs, the overlying strata of coal seams are generally divided into caving, fractured, ... The test results show that the crushing behaviour of coal and rock particles in the compaction process can be divided into three stages: the structural re-arrangement and crushing of particles under a low stress, particle breakage ...

When coal and gas outburst occurs, an enormous amount of coal and gas are ejected from the coal seam, and coal is quickly broken and moved to the coal mining work face. The entire process consumes …

Coal mining has significant impact on land and land use, some of the land related impact are: Loss of biodiversity, Economic loss or loss of livelihood due to ... drilling, crushing and movement of vehicles. Blasting results in ground vibrations and if there are human habitation nearby, it can destroy property and houses 6) ...

To ensure the filling effect of the mining area and to protect the safety of coal production, the compaction and re-crushing characteristics of crushed gangue warrant investigation [8,9].

Abstract: To obtain commercial product of required quantitative and qualitative parameters, hard coal must be subjected to a number of processing …

Glossary of Mining Terminology. A. Abutment - In coal mining, (1) the weight of the rocks above a narrow roadway is transferred to the solid coal along the sides, which act as abutments of the arch of strata spanning the roadway; and (2) the weight of the rocks over a longwall face is transferred to the front abutment, that is, the solid coal ...

An increasing number of mining gobs are formed as underground coal resources continue to be mined [1]. Caved, fractured, continuous bending, and soil zones may be identified in response to longwall mining [2,3]. ... In this paper, quantitative characterization of layered re-crushing of coal particles during compression is achieved …

From mine face to eliminating tailings ponds, McLanahan provides solutions for both surface and underground coal mining in all aspects of the operation. The company offers a full range of feeding, crushing and sampling equipment, as well as washing and dewatering systems that can remove impurities and increase the heating value of your coal.

The most common minerals found in coal mines include: 1.Pyrite (FeS2): This is a common mineral found in coal seams and can be associated with coal in the form of pyrite nodules or bands. Pyrite ...

The coal used in the experiment was taken from the # 2 coal seam of the Hanzui Coal Mine, Linfen City, Shaanxi Province, China. The type of coal is coking coal with a density of 1.3 g/cm 3 . The ZKXG30 mining borehole imaging track detection device, which is composed of the host and probe, was used for imaging detection of crushed …

1. Introduction. Intelligent mining, which is based on mechanized and automatic mining methods and which combines informatization with industrialization, has brought about a revolution in the coal industry [1].This new technology can carry out mining automatically by intelligently perceiving the circumstances around the work face, …

Longwall mining is a highly productive, economical, and relatively safe method of coal mining. Academician Qian pointed out that as the longwall panel advances, the fractured irregular overlying rock masses and residual coal collectively form a porous medium called the gob area [1], which is illustrated in Fig. 1 (a). Inter-particle voids …

1. Introduction. As a type of non-renewable energy, coal plays an important role in the world energy structure, which is one of the main energy sources in China, the United States, Australia and other countries [1].However, a variety of disasters and accidents become more serious as the mining depth increasing, and they have great influence on …

T o ensure the filling effect of the mining area and to protect the safety of coal production, the compaction and re-crushing characteristics of crushed gangue warrant investigation [ 8, 9 ].

In this study, dynamic compaction method was used to treat the gangue hill of the Xinglongzhuang coal mine in China, and the deep compaction of deep coal gangue was examined. The crushing characteristics and improving depth of coal gangue filling under different dynamic compaction conditions were determined. Dynamic …

DUST LIBERATION DURING CRUSHING coal mine workers is a shift average of 2.0 mg of airborne respirable coal mine dust per cubic meter of air (2.0 mg/m3 as defined by the Mining Research Establishment (MRE) Criteria) [7]. MSHA also does not permit explosive accumulations of coal dust in the air of or on

Crusher. In the mining industry, there are many types of machines for reducing large rocks into smaller rocks, or to gravel, sand, or rock dust. ... Used to transfer coal from a loading or mining machine to an underground loading point, mine railway, or belt conveyor system. Skip. A self-dumping bucket for hoisting ore or rock in a shaft.

3.1.2 Construction of intelligent coal mine knowledge map. Through the establishment of information entities, the mapping from the physical space to the digital space is realized. This mapping includes not only physical entities (e.g., coal mining machines, hydraulic supports, and tunneling machines), but also time entities (e.g., roof …

The results of laboratory tests for selective crushing susceptibility of steam coal and coke are presented, and a comparative analysis of the tested types of coal is …

blasting & deploy SDL or LHD for loading and transportation of coal in the active mining areas. Coal transportation to surface is either by a series of belt conveyors or rope haulage drawn coal tubs. 2.1.2. Continuous mining In many of CIL new underground mines, bord & pillar mining is carried out

A coal crushing and screening plant is a facility used to sort and process coal for industrial purposes. It is an essential part of the coal mining and production process. The plant typically ...