In this paper the Kamat-Riley (K-R) event-based Monte Carlo simulation method was used for reliability analysis of longwall shearer machine. Shearer machine consists of six subsystems; water, haulage, electrical, hydraulic, cutting arms and cable systems in a series network configuration. A shearer in the Tabas coal mine was selected as case study and its all failure data were collected and use...

The paper presents results of application of a machine learning method, namely the induction of classification and regression rules, for seismic hazard prediction in coal mines. The main aim of this research was to verify if machine learning methods would be able to predict seismic hazard more accurately than methods routinely used in Polish coal mines on the basis of data gathered by monitorin...

To study the caving of thick hard overburdens and evolution water-conducting fracture zones in fully mechanized top-coal faces gently inclined extra-thick coal seams, we comprehensively analyzed 8103 working face Beixinyao Coal Mine. We investigated to characteristics overburden faces, information internal structure overburden, development heights “two zones” after mining. Our research methods ...

In 1991 the Mine Safety and Health Administration conducted a special program to assess occupational exposures to respirable coal mine dust in underground coal mines. Priority was given to longwall mining operations, mines with a history ofhaving a problem controlling dust to the applicable standard, and a representative number of all other mines. Measurements were obtained on approximately 720...

Abstract The floodable volume of longwall gob can be great importance in developing accurate coal mine operation plans, particularly for water management and environmental control strategies. Given the inaccessibility difficulty direct measurement characteristics following recompression, hydrologic, geomechanical, spatial data principles were used to solve porosity height residual using a mathe...

Effective gas management in coal mines, as well as proper ventilation design, is very important for maintaining the safety of underground coal miners. Advances in numerical modeling techniques have enabled evaluations of the coal mining environment using advanced grid designs and computed gas distributions through detailed mathematical models. These models help engineers to “see” the “unseen” a...

In coal mining, longwall mining is a preferred method to maximize production by extracting large blocks of coal that have been outlined with a set of development entries. In U.S. mines, longwall panels are typically 305 m (1,000ft) wide (with a continual trend towards even wider panels), and usually over 3,050 m (10,000ft) in length. The increasing size of longwall panels, while helping to incr...

The over-exploitation of resources caused by the increasing coal demand has resulted in a sharp increase solid waste emissions mainly gangue, which made burden on environment, economy, resources, and society our country heavier. In order to achieve balance between energy consumption emission process top caving, this study carried out gangue recognition research based multi-source time–frequency...

A thin coal seam mined as a protective coal seam above a gas outburst coal seam plays a central role in decreasing the degree of stress placed on a protected seam, thus increasing gas permeability levels and desorption capacities to dramatically eliminate gas outburst risk for the protected seam. However, when multiple layers of coal seams are present, stress-relieved gas from adjacent coal sea...