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सीएमपीडीआई Cmpdi a Mini Ratna Company

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सीएमपीडीआई Cmpdi a Mini Ratna Company सीएमपीडीआई cmpdi A Mini Ratna Company A REPORT ON CONSTRUCTION AND INSTALLATION OF PIEZOMETERS IN RANIGANJ, SAHARJURI AND RAJMAHAL COALFIELDS EASTERN COALFIELDS LIMITED FOR EASTERN COALFIELDS LIMITED (A SUBSIDIARY OF COAL INDIA LTD.) SANCTORIA (ASANSOL) FEBRUARY, 2019 Job No-111609 A REPORT ON CONSTRUCTION AND INSTALLATION OF PIEZOMETERS IN RANIGANJ, SAHARJURI AND RAJMAHAL COALFIELDS EASTERN COALFIELDS LIMITED Prepared by Hydrogeology Section Exploration Division CMPDI (HQ), Ranchi FOR EASTERN COALFIELDS LIMITED (A SUBSIDIARY OF COAL INDIA LTD.) SANCTORIA (ASANSOL) February, 2019 PERSONNEL ASSOCIATED Hydrogeological Documentation Prabhu Prasad Chief Manager (Geology) Afatab Alam Manager (Geology) Field Exertion Afatab Alam Manager (Geology) Overall Guidance A. K. Mohanti General Manager (Expl.) Prabhu Prasad Chief Manager (Geology) Construction and Installation of Piezometers in Raniganj, Saharjuri & Rajmahal Coalfields CMPDI CONTENT Chapters Page No. 1.0 Introduction 1 2.0 Location 2 3.0 Topography 3 4.0 Drainage 4 5.0 Geology of the Area 6-8 6.0 Construction and Installation of piezometers 9-26 6.1 Construction of piezometers 9-17 6.1.1 Construction of piezometers in Raniganj CF 11 6.1.2 Construction of piezometers in Saharjuri CF 12 6.1.3 Construction of piezometers in Rajmahal CF 13 6.2 Development of piezometers 17 6.3 Piezometer Testing 19 6.3.1 Piezometer Testing in Raniganj CF 20 6.3.2 Piezometer Testing in Saharjuri CF 21 6.3.3 Piezometer Testing in Rajmahal CF 21 7.0 Water Sample collection and quality analysis 27 LIST OF TABLES Table No Description Page No. Table No – 1 Stratigraphic Succession 6 Table No – 2 Cluster-wise details of piezometer 15 Table No – 3 Aquifer parameter determined from piezometer 23 Table No – 4 Final location of AWLR 26 ______________________________________________________________________________________ JOB NO - 111609 Construction and Installation of Piezometers in Raniganj, Saharjuri & Rajmahal Coalfields CMPDI ANNEXURES Annexure-IA Graphical analysis of Recovery test Annexure-IB Graphical analysis of Slug Injection test Annexure-II Water Quality report Annexure-III letter regarding award of Job Number. Annexure-IV Approval of EDs Annexure-V Request letter from ECL LIST OF PLATES PLATE-1 Location Plan PLATE-2 Location of piezometers in Raniganj Coalfield PLATE-3 Location of piezometers in Chitra OCP Area PLATE-4 Location of piezometers in Rajmahal OC Area PLATE-5 Location of piezometers in Simlong OCP Area PLATE-6 to 30 Design and location of piezometers in Raniganj CF PLATE-31 to 32 Design and location of piezometers in Saharjuri CF PLATE-33 to 35 Design and location of piezometers in Rajmahal CF ______________________________________________________________________________________ JOB NO - 111609 CMPDI ________________________________________________________________________ DETAILS OF THE REPORT 1 Name of the Project Construction and Installation of Piezometer in Raniganj, Saharjuri and Rajmahal Coalfields, Eastern Coalfield Limited 2 Purpose of Piezometer Monitoring of water level and quality in semi- confined/leaky/deeper aquifers for assessment of impact of coal mining activity on groundwater regime. Water level and quality of Shallow/Unconfined/phreatic aquifer will be monitored using existing dug-wells. 3 State Covered West Bengal and Jharkhand 4 Coalfields covered Raniganj, Saharjuri, Rajmahal Coalfield. 5 Topography 1) Raniganj CF: Gently undulating terrain with highest elevation in the north-central area and sloping towards south and south- east i.e. towards Damodar River and towards north and northeast i.e. towards Ajay River is observed. 2) Saharjuri CF: The area is marked by more or less flat and gently undulating topography. The ground elevation of the area ranges from 180 to 205 m above mean sea level and the general slope of topography is towards west and southwest i.e. towards Ajoy River. 3) Rajamahal CF: In general, coal bearing Barakar Formations have been found to occur in the lower reaches whereas Rajmahal Traps occupy the higher riches (Rangamatia Hill) of the topography. The low-lying Gondwana areas are generally cultivated and are devoid of forest. 6 Annual Rainfall Average annual rainfall- 1490 mm at Asansol (Raniganj CF), West Bengal 1135 mm at Chitra project (Saharjuri CF), Jharkhand 1172 mm at Rajmahal OC (Rajmahal CF), Jharkhand 1678 mm at Simlong OC (Rajmahal CF), Jharkhand 7 Master drainage Damodar and Ajay River (Raniganj CF), Ganga River (Rajamahl CF), Ajay River (Saharjuri CF) 8 Geological Formation Raniganj and Barakar Formation 9 Aquifer system a. Top unconfined/ phreatic aquifer above the top most coal seam b. Deeper/Semi-confined / leaky confined aquifer below the topmost coal seam. 10 Nature of activity Mining of coal by opencast and underground method. 11 Number of Total 30 nos. of piezometers have been constructed in ECL Piezometers command areas. 1) 25 nos. in Raniganj Coalfield, 2) 3 nos. in Job No. 111609 CMPDI ________________________________________________________________________ constructed Rajmahal Coalfields, 3) 2 nos. of piezometer in Saharjuri Coalfield. 12 Depth of Piezometers 35 m to 148 m 13 Water Level in 1) Raniganj Coalfield: 4.40 m (Madhaipur Piezometer, Piezometer (m) Pandaveshwar Area) to 115 m (Bejdih Piezometer, Sodepur Area) 2) Saharjuri Coalfield: 9.89 m to 17.30 m 3) Rajmahal Coalfield: 9.37 m (Old Worksop, Rajmahal OC) to 22.03 m (Lohandiya Panchayat Bhawan, Rajmahal OC) 14 Discharge of 1) Raniganj Coalfield: 0.10 to 4.54 lps Piezometers (lps) 2) Saharjuri Coalfield: 0.41 to 1.42 lps 3) Rajmahal Coalfield: 0.41 to 1.10 lps 15 Aquifer Parameters 1) Raniganj Coalfield: 0.778 to 0.0030 m/day (Permeability) 2) Saharjuri Coalfield: 0.0157 to 0.050 m/day 3) Rajmahal Coalfield: 0.131 to 0.105 m/day 16 Aquifer Parameters 1) Raniganj Coalfield: 0.0689 to 36.60 m2/day 2 (Transmissivity) 2) Saharjuri Coalfield: 4.81 m /day 3) Rajmahal Coalfield: 5.23 m2/day Job No. 111609 Construction and Installation of Piezometers in Raniganj, Saharjuri & Rajmahal Coalfields CMPDI 1.0 INTRODUCTION Regular monitoring of groundwater level and water quality are required to be carried out by construction of new piezometers (observation wells) as a part of compliances of environmental clearance of 12 Clusters of mines (Cluster-1 mines to Cluster-12 mines) and standalone project like Mohanpur OC, Kalidaspur UG, Rajmahal OC, Simlong OC and Chitra OC, of Eastern Coalfields Limited granted by MoEF & CC, Govt. of India. As requested by GM (Envt.), ECL vide his letter no. ECL/ENV/NS/18/23, dated 01.02.2018, Hydrogeology Section of Exploration Division of CMPDI HQ has taken up the job to supervise the construction of piezometer followed by pumping test in ECL command Area (Raniganj, Saharjuri & Rajmahal Coalfield). A report entitled ‘Location and Design of Piezometers’ for 12 cluster of mines and 5 standalone projects was submitted to ECL in 2017 for further drilling and construction of piezometer in proposed locations. It was requested by ECL for technical guidance and supervision for construction in association with Hydrogeologist of CMPDI vide letter No ECL/ENV/NS/18/23, Dated-01.02.2018. Afterward Hydrogeologist from CMPDI (HQ), Ranchi has attended the assigned job of supervision of construction of piezometer followed by pumping test. For the purpose of drilling and installation of piezometers, ECL outsourced the job to Kolkata based water wells drilling company M/S ‘Shiv Driller’. The construction of piezometer has been done as per the location and design of piezometer provided by Hydrogeology Department, CMPDI, Ranchi. The purpose of the construction of piezometers is to monitor the groundwater in confined/semi-confined aquifers in respect to the impact of coal mining or any other activity on groundwater regime, if any. Proposal for suitable location and design of piezometers have been done to monitor both groundwater level and quality of targeted aquifer/aquifers. Job No. 111609 1 Construction and Installation of Piezometers in Raniganj, Saharjuri & Rajmahal Coalfields CMPDI Monitoring of groundwater levels of top unconfined/phreatic aquifer, using already established network of dug-well/open wells within the coalfield, is to be continued. The present established network of these dug wells are showing condition of the top phreatic aquifer, which is more potential than the below semi- confined/leaky aquifer. A network of piezometers tapping deeper/semi-confined aquifer (below phreatic aquifer) are necessary to evaluate the impact in the vicinity of active coal mining areas. A piezometer is a purpose-built, non-pumping observation bore well that facilitates measurement of vertically averaged piezometric head of an aquifer. A piezometer taps only the targeted aquifer blinds the rest of drilled strata and finally isolates the aquifer from the rest of the drilled strata and ground by properly placed seals. Piezometers are also used for sampling groundwater from the tapped aquifer for water quality monitoring. 2.0 LOCATION All the clusters of mines (Cluster-1 to Cluster-12) and standalone Mohanpur OCP and Kalidaspur UG, Eastern Coalfields Limited are located in the Raniganj Coalfield in Barddhaman District of West Bengal and partly in Dhanbad District of Jharkhand. All these mines are located near Asansol town. It lies in the Survey of India Toposheet no. 73 M/1, M/2, M/6, I/9, I/10, I/13 & I/14 and is defined by latitude 23O 34' and 23O 49' North and longitude 86O 03' and 87O 24' 0" East. The Rajmahal OC block is located at a distance of 32 km north of Godda town. It lies in the Survey of India Toposheet no. 72 Q/8 and is defined by latitude 25o 01' 12" and 25o 03' 15" North and longitude 87o 21' 0" and 87o 24' 0" East. Simlong OCP block of Rajmahal Area, Eastern Coalfields Limited is located at a distance of 30 km east from Godda town and Sundarpahari is at a distance of 10 km to the west from the block. It lies between latitude 24o 44' 33" and 24o 45' 55" North and longitude 87o 26' 30" and 87o 28' 38" East.
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