Behera U.K.,Singareni Collieries Company Ltd |
Rama Sita D.,Dr Paul Raj Endneering College
Journal of Mines, Metals and Fuels | Year: 2011
In the competitive world market, productivity is fundamental to economic progress and prosperity of any industries and services throughout the world. The dominant factor underlying the development of any nation has been "productivity improvement". Organizations are trying to improve the core processes through different types of process improvement strategies viz. continuous improvement (CI), benchmarking (BM) and re-engineering (RE). Among these bench marking is an important tool, which enables to look for and emulate the best available work practices and processes. To aid this approach, many tools and techniques of operations research have been used. Among them data envelopment analysis (DEA) technique is a powerful tool in performance evaluation to identify the benchmarks. Many researchers have applied this technique to different sectors. The application of these tools and techniques is limited in mining sector due to the complex nature of operations. Coal mining in India is over a century old and labour intensive industry and contributing to 5% of the GDP. During the X Plan period, major changes have come in the industrial policies. The mining sector has opened up to private investors and it is continuing to do so in the XI Plan period. The pressure on the public sector undertakings became high due to these developments. Performance improvement is a crucial for survival in public sector mining organizations also. In India, Singareni Collieries Company Limited (SCCL) is a public sector mining organization and is the largest producer of coal in India after Coal India Limited (CIL) with a manpower of 69,000 and catering to the energy needs of southern part of India. This communication focuses only on the formulation of road map to evaluate the performance of the coal mines to establish the benchmark. The operations research technique DEA is applied to measure the efficiency of coal mining units of SCCL to fulfill the above mentioned task. We have selected 48 underground (UG) mines for our analysis, categorized them into different groups after preliminary round of analysis. After a detailed analysis we have identified 17 underground mines in pure hand section category and applied weight restriction and cross efficiency measures (CEM) model to identify the best mine.
Khandelwal M.,Maharana Pratap University of Agriculture and Technology |
Kumar D.L.,Singareni Collieries Company Ltd |
Yellishetty M.,Monash University
Engineering with Computers | Year: 2011
In this study, an attempt has been made to evaluate and predict the blast-induced ground vibration by incorporating explosive charge per delay and distance from the blast face to the monitoring point using artificial neural network (ANN) technique. A three-layer feed-forward back-propagation neural network with 2-5-1 architecture was trained and tested using 130 experimental and monitored blast records from the surface coal mines of Singareni Collieries Company Limited, Kothagudem, Andhra Pradesh, India. Twenty new blast data sets were used for the validation and comparison of the peak particle velocity (PPV) by ANN and conventional vibration predictors. Results were compared based on coefficient of determination and mean absolute error between monitored and predicted values of PPV. © 2009 Springer-Verlag London Limited.
Jha N.,University of Lucknow |
Basava Chary M.,Singareni Collieries Company Ltd |
Aggarwal N.,University of Lucknow
Journal of Earth System Science | Year: 2012
The entire 606 m-thick sedimentary sequence in borecore MCP-7 from Chintalapudi area, Chintalapudi sub-basin has been lithologically designated as Kamthi Formation. However, the palynological investigation revealed five distinct palynoassemblages, which essentially fall under two groups, one group (Palynoassemblage-I, II and III) having dominance of striate disaccates along with presence of some stratigraphically significant taxa, belongs to Late Permian (Raniganj) palynoflora, while the other group (Palynoassemblages IV and V) shows sharp decline in percentage of characteristic taxa of first group, i.e., striate disaccates, and consequent rise or dominance of taeniate and cingulate cavate spores, belongs to Early Triassic (Panchet) palynoflora. Palynoassemblage-I, II and III (Group I) are characterized by dominance of striate disaccates chiefly, Striatopodocarpites spp. and Faunipollenites spp. along with presence of rare but stratigraphically significant taxa, viz., Gondisporites raniganjensis, Falcisporites nuthaliensis, Klausipollenites schaubergeri, Chordasporites sp., Striomonosaccites, ovatus, Crescentipollenites multistriatus, Verticipollenites debiles, Strotersporites crassiletus, Guttulapollenites hannonicus, G. gondwanensis, Hamiapollenites insolitus, Corisaccites alutus, Lunatisporites ovatus, Weylandites spp. and Vitreisporites pallidus. Palynoassemblage-I is distinguished by significant presence of Densipollenites spp. while Palynoassemblage-II shows significant presence of Crescentipollenites spp. and Palynoassemblage- III differs from the above two assemblages in having significant presence of Guttulapollenites hannonicus. Palynoassemblage-IV (Group II) is characterized by high percentage of taeniate disaccates chiefly Lunatisporites spp., while Palynoassemblage-V (Group II) is characterized by cingulate-cavate trilete spores chiefly, Lundbladispora spp. and Densoisporites spp. Striate disaccates show a sharp decline in these two assemblages. In Chintalapudi area Late Permian and Early Triassic palynoflora has been recorded for the first time indicating existence of Raniganj and Panchet sediments as well. The study further supports the earlier studies of Jha and Srivastava (1996) that Kamthi Formation represents Early Triassic (=Panchet Formation) overlying Raniganj equivalent sediments with a gradational contact. © Indian Academy of Sciences.
Kushwaha A.,Indian Central Institute of Mining and Fuel Research |
Sharma D.N.,Singareni Collieries Company Ltd |
Tewari S.,Indian Central Institute of Mining and Fuel Research |
Bhattacharjee R.,Indian Central Institute of Mining and Fuel Research |
Sinha A.,Indian Central Institute of Mining and Fuel Research
46th US Rock Mechanics / Geomechanics Symposium 2012 | Year: 2012
Stability of coal mine roadways is found to be a major problem in presence of in situ horizontal stress anisotropy especially in geologically disturbed zones. On most of the occasions, geological discontinuities become more prominent in a particular direction. Such condition causes instability in the roadways some times severely. In the present paper, authors have dealt with a case study of Singareni Collieries Company Limited (India), where the instability in one set of the roadways was found to be due to the major horizontal in situ stress acting perpendicular to the roadways. Based on field investigations, geo-technical mapping and underground observations of development roadways, orientation of the major and minor horizontal stresses were established. 3-dimensional numerical modelling has been used to simulate the failure pattern of the level and dip-rise galleries and accordingly magnitude of major and minor in situ horizontal stresses have been estimated. Using these in situ horizontal stresses in 3D numerical modelling, best possible stable orientation of the roadways has been proposed. Accordingly, required support system of the roadways has been designed. Mine management oriented the roadways of bottom section of King seam as per the study recommendations and developed the whole area of the mine up to its boundary successfully. Copyright 2012 ARMA, American Rock Mechanics Association.
Srinivas B.,Singareni Collieries Company Ltd
World Journal of Laparoscopic Surgery | Year: 2012
Whipple is one of the most demanding and complex surgeries of the abdomen. It is the most commonly performed operation for pancreatic cancer, the fourth leading cause of cancer death in the United States. For patients with benign as well as malignant pancreatic tumors, it is believed that the robotic Whipple procedure will be a major improvement over the traditional procedure. The robotic surgery involves five small incisions (one to accommodate a miniature camera), rather than a large incision and separation, not cutting of muscles.
Ramesh Kumar B.,Corporate Planning and Projects |
Sambasiva Rao B.,Singareni Collieries Company Ltd
Journal of Mines, Metals and Fuels | Year: 2010
The common practice with most of the coal mining planners is similar to cooking food in a jiffy. In today's world there are many user friendly software tools available for accurate, easy to modify the user defined proposals in mine planning. All these tools enable the planner to save on time and cost, which make a project viable and helps in decision making. Expertise in new technologies cannot be acquired overnight. Patience, industry focused approach with tenacity brings in success. This paper tries to explain the advances in the Information Technology which can be successfully adopted for coal mine planning and the care required to be taken by a new/existing coal mine owner/operator/planner while choosing a suitable software (entry level to advanced) for the right appreciation, to optimize the benefit.