The CoalLog standard includes data entry sheets and standard dictionaries of code lookup tables for coal borehole header, drilling, lithology, water flow, geotechnical and quality data.

Geophysical logs can be used to identify coal beds and to quantify their resources because coal has several unique physical properties including low natural radioactivity, low density, and high resistance to electrical currents; these properties contrast with those of most other rocks in the coal-bearing sequence.

Bituminous coal has been mined in the Forest City Basin since the 1890's and, in more recent times, evaluated in terms of potential coalbed methane production. The gamma-ray, photoelectric factor, neutron and density porosity curves are displayed in a conventional log presentation.

Coal Log Manual - Free download as PDF File (.pdf), Text File (.txt) or read online for free. This document is a training manual for rig geologists and geotechnical logging. It provides guidance on roles and responsibilities of rig geologists including …

2022年6月29日 · Conventional well logs are now generally used by mining geoscientist for identification. of coal layer. The aim of this study is to identify coal layers and investigate physical properties...

2019年2月1日 · Geophysical well-logging data can be used to predict coal layers, estimate mechanical properties of coal, and even evaluate physical properties and petrophysical characteristics of coal layers such as porosity, permeability, coal moisture, ash, fixed carbon and volatile contents, etc. (Charbucinski and Nichols 2003; Fu et al. 2009a, b; Karacan ...

2020年1月22日 · In an emerging digital mining age, such a use of geophysical logs helps to establish reliable geological and geotechnical models, which reduces safety and financial risks due to geological and...

2020年1月2日 · Compared with traditional methods for identifying coal structure base on borehole cores or mining seam observation, geophysical logging has become the most economic and efficient technique. Several linear correlations have been established to describe the relationships between the coal structures and well logs.

This document defines standardized headers, codes, and descriptors for logging coal boreholes. It includes headers for hole type, purpose, data status, geodetic datum, height datum, accuracy, and logs run. It also includes descriptors for sample types, lithology, interval status, and minerals.

In this paper, we will demonstrate various applications of geophysical logs such as the estimation of the strength of intact rock or the unconfined (or uniaxial) compressive strength (UCS),...