Delineation of waterlogged area in inaccessible underground workings at Hingir Rampur Colliery using 2D resistivity imag
- PDF / 431,059 Bytes
- 4 Pages / 595.276 x 790.866 pts Page_size
- 68 Downloads / 140 Views
ORIGINAL PAPER
Delineation of waterlogged area in inaccessible underground workings at Hingir Rampur Colliery using 2D resistivity imaging: a case study K. K. K. Singh
Received: 17 February 2012 / Accepted: 6 December 2012 / Published online: 8 January 2013 Ó Springer-Verlag Berlin Heidelberg 2013
Abstract Resistivity imaging (RI) survey was carried out along two profiles in the Hingir-Rampur Colliery to assess how far it would be practical to extend the workings in Seam I towards the waterlogged previous workings, whilst leaving at least 60 m of coal between the two sections of mine. In order to corroborate the results of the geophysical survey, two boreholes were drilled along the profiles. Analysis confirmed hard, compact and dry strata between 60 and 146 m depth. Keywords Apparent resistivity Inundation 2D inversion Waterlogged Re´sume´ Des tomographies de re´sistivite´ e´lectrique ont e´te´ re´alise´es suivant deux profils dans la mine de charbon de Hingir Rampur afin d’e´valuer dans quelle mesure il serait possible d’e´tendre les travaux miniers de la Couche I vers une zone de travaux pre´ce´demment ennoye´s. En effet, une couche de charbon d’au moins 60 m d’e´paisseur se trouve entre ces deux zones de travaux. Afin d’e´talonner les mesures ge´ophysiques, deux forages ont e´te´ re´alise´s au niveau de ces deux profils ge´ophysiques. L’analyse a confirme´ la pre´sence d’une couche de charbon dur, compact et sec entre les profondeurs de 60 m et 146 m. Mots cle´s Re´sistivite´ apparente Inondation Inversion 2D Ennoyage
K. K. K. Singh (&) Central Institute of Mining and Fuel Research, Dhanbad 826015, Jharkhand, India e-mail: [email protected]
Introduction Inundation is one of the most hazardous incidents that can take place in a mine. Many such incidences have occurred in the Indian mining industry, generally related to the sudden inrush of large volumes of water from old, abandoned and inaccessible workings. The Hingir-Rampur Colliery is one of the oldest mines in Orissa which was opened in 1906 and more recently is extracting coal in Seam I at a depth of more than 100 m. As the workings are progressing in the direction of the old water-logged goaves of pits 9 and 11(Fig. 1), it is important to determine whether the new mining will approach within 60 m of the abandoned workings to avoid any risk of inundation. A review of the literature reveals that there are no systematic studies related to delineation of old water-logged areas in underground mines of Indian Coalfields. It was hoped that the study would elucidate the conditions at Hingir-Rampur and provide preliminary platform for further detailed investigation of water-logging problems using resistivity imaging.
Methodology Multi-electrode resistivity imaging was the chosen technique as it has been used in the past for cavity/void detection and because of its low cost, simple field procedures and rapid interpretation of data (Vincenz 1968; Dutta et al. 1970; Militzer et al. 1979; Smith 1986; Panno et al. 1994; Batayneh and Al-Zoubi 2000). The
Data Loading...
