Prefeasibility Report of ROHINI OCP (5.0 MTPA)
Total Page:16
File Type:pdf, Size:1020Kb
Prefeasibility Report of ROHINI OCP (5.0 MTPA) SUMMARISED DATA Sl.No. Particulars Details 1. Name of the Project Rohini OCP (Expansion from 3.3 to 5.0 MTPA) North Karanpura Area, CCL. 2. Type of the Project Opencast coal mining Project. 3. Location Village –Karkatta, Nawadih &Tumang Block - Khalari District – Ranchi(65 km) Nearest Railway Station - Khalari (07Km). 4. Method of working Shovel Dumper combination. 5. Purpose of the present proposal Mining Plan and mine closure plan for increase in mine capacity from 3.3 MTPA to 5.0 MTPA within the same project area. The mine plan and mine closure plan of increased capacity is required for environmental clearance of project. 6. Area of the Project 255.68 Ha 7. Earlier approval of Project Report Project Report of Rohini OCP approved in 351th meeting of Board of Directors of CCL held on 29.09.2008. 8. Seams considered Middle Lower Dakra, Top Lower Dakra and Upper Dakra 9. Grade of coal G-11 10. Gradient of the seams 20– 30 11. Total Mineable reserves (as on 31.03.2018) 7.61 MT 12. Target capacity Peak 5.0 MTPA. 13. Maximum working depth (m) 65 m 14. Area of Excavation 204.05 Ha. 15. Area of External Dump Nil 16. Main consumers proposed Basket linkage to the consumers in power sector &sponge iron. 1 17. Life of the project Balance 2 years from April 2018,i.e. from 2018-2019 onwards 18. Total Existing Manpower (April 2018) 509 19. Power supply Through 33KV feeder of new KDH sub-station. 20. Coal despatch arrangement By tipping trucks from mine to KDH &Dakra Railway sidings. 2 CHAPTER – I INTRODUCTION 1.1 Brief Description & History of the Project Rohini Opencast mine is an operational mine of CCL. The Project falls in North Karanpura Coalfields in Khalari CD block, Ranchi district of Jharkhand state. Initially, there was an expansion in capacity from 0.80 MTPA to 2.00 MTPA (incremental 1.20MTY). The expansion was planned by extending dip side boundary of the existing project in Rohini Geological Block. The earlier Rohini OCP (0.8MTPA) was sanctioned in March 1991 with capital investment of 27.18 Crores. The expansion Project Report of Rohini OCP (2.0/2.30 MTPA normative / peak capacity) was approved in 351st meeting of Board of Directors of CCL held on 29.09.2008 with capital investment of Rs 105.67 crores. The Environmental clearance was granted by MoEF&CC on 05.10.2009.The mine is operational since 1992-93. Afterwards under clause 7(II) of EIA 2006 the capacity of Rohini OCP was increased from 2.30 MTPA to 3.30 MTPA. The Environmental clearance was granted by MoEF&CC on 21.02.2017 Present Proposal 1.2 Purpose of this report To facilitate Environmental clearance for enhancement in capacity to 5.0 MTPA Peak 1.3 Identification of Project Proponent Central Coalfields Limited (CCL), a subsidiary of Coal India Limited is a prime producer of coking & non-coking coal in the country. It operates coal mines in the state of Jharkhand. Mining operation is spread over six coalfields i.e North Karanpura, South Karanpura, East Bokaro, West Bokaro, Ramgarh and Giridih Coalfields. The proposed project, i.e. Rohini Expansion OCP is administratively under NK Area of CCL headed by General Manager, NK Area. 1.4 Brief description of nature, size and location of the project Nature & Size Rohini Expansion OCP is an opencast coal mining project. The total requirement of land is 255.68Ha. The balance life of the project is 2 years as on 31.03.2018. 3 Location, Communication& Drainage Rohini opencast Mine is located just south of Damodar river in Khalari block, Ranchi district of Jharkhand State. K.D Hesalong and Karkatta OCP are situated south of the project while Purnadih OCP and Ashok OCP are situated on the other side of river Damodar. It is covered by the Survey of India topo-sheet no. 73-A/14. The nearest Airport connected by daily commercial flights is at Ranchi. Major Drainage system is Damodar river. HFL of river Damodar is upstream 428.00 m & downstream 426.00 m and surface RL of the area varies from 416m to 467m along river Damodar. 4 CHAPTER-II PROJECT DESCRIPTION 2.1 Land Requirement for the Project The total requirement of land for Rohini OCP( 5.0 MTPA) is 255.68Ha. A detailed break-up of land use under different heads is shown in the following table. Total land for exp. project Particulars Forest Non- Forest Total Quarry 138.33 65.72 204.05 Haul Road 1.63 0.50 2.13 Embankment 6.53 14.24 20.77 Nala Diversion 0.30 0.50 0.80 Safety Zone 0.00 27.93 27.93 Gross Total 146.79 108.89 255.68 NOTE: Total available FC is for 71.98 Ha +74.81 Ha ie 146.79 Ha. 2.2 Present status of project The last Project Report of Rohini Expansion OCP was approved in 351st meeting of Board of Directors of CCL held on 29.09.2008. The latest Environmental clearance was granted by MoEF&CC on 21.02.2017. Currently this is a running mine & production for last few years is given below. SN Year Coal (MT) OB (M Cum) 1 08--09 0.70 1.52 2 09--10 0.82 1.20 3 10--11 0.82 1.06 4 11--12 0.70 0.93 5 12--13 0.74 0.97 6 13--14 0.73 0.89 7 14--15 0.55 1.11 8 15-16 0.51 1.20 9 16-17 2.79 7.99 10 17-18 3.3 4.33 5 2.3 Salient features of the project Quarry The mine is already under operation with five 5 cum electrical rope shovels and two 4 cum hydraulic shovels. Since the quarry is already working no box cut is needed to open the quarry as the present mine operation is in strike direction with the existing bench length of about 250 m. In this report, it is proposed to follow the inclined slicing method of operation. Internal dumping is proposed to fill up area excavated. Mining System Considering the technical parameters of the quarry,i.e gentle dipping of the seam(20 to 30), long strike length of quarry(2.15 to 2.3 km),multiple seam of various thickness ,total life of the project etc.,the shovel dumper mining system has been proposed for the project. The benches are made parallel to the roof and floor of the seam wherever possible. The height of individual benches are 10-12 m in OB and in coal height of the bench are equal to thickness of the seam. The width of working and non-working benches are 40 m and 20 m respectively in coal and OB. In total, there are three benches to be worked at a time where the shovels are deployed. The other benches are non-working. This has been done in order to make the running slope moderate. With this system of mining, the running slopes of quarry is 130 corresponding to an ultimate slope of the quarry as 450for an ultimate depth 65 m. Coal Winning The coal is mined with hydraulic shovel working with 35 T Rear Dumpers. The coal from bottom seam i.e Middle Lower Dakra seam is transported through the haul road made on the floor of the seam at gradient not exceeding 1 in 16 with a width of 20 m. The coal from other seams is transported through either the batter’s or through the ramp to the upper bench/surface. The ultimate depth of quarry being 65 m only, the coal transportation from the benches to surface is not a problem. The ROM coal after crushing is transported to KDH siding. Further coal transport is through the railway transportation system O.B. Removal THE OB along with the partings is removed by 5 cum Electric Rope Shovel and 4 cum Electric Hyd Shovel. OB is transported from face to dumping site through batter’s road made at a gradient not exceeding 1 in 16 with a width of 20 m.The Top OB is transported through surface roads. However, the topsoil is preserved at a suitable place for reclamation. 6 Drilling and Blasting For drilling in coal, 1 no RBH drill of 160 mm dia has been provided. For drilling in OB 3 no of RBH drill 160 mm diaalong with 1 no of 250mm diameter have been provided. Specific consumption of explosives has been envisaged as 0.3 kg/cum and 0.2 kg/cum for OB and coal respectively. Present Population of Main HEMM The HEMM on roll is given below: Electric Rope Shovel EKG 5A 5 Cum 05 Hydraulic Shovel CK 300 02 35T 04 Rear Dumpers 60T 03 100 T 09 IDM 300 Drill 02 Dozer D 155 02 Dozer D 355 03 Wheel Dozer 01 Motor Grader 02 Water Sprinkler 02 Escort Hydra Crane 12Te 01 Crane 40Te 01 Tire handler 01 7 Mine Boundary Northern Boundary Quarry surface boundary on northern side has been fixed keeping a surface barrier of 120m from Damodar river and floor boundary is restricted by a fault no. 10. The southern floor boundary has been fixed keeping a distance of 60 m Southern Boundary from Kendua river which flow to west to east and meet the river Damodar at S-E edge of the quarry Eastern Boundary The eastern floor boundary has been fixed keeping a surface barrier of 120m from river Damodar.