Proceedings of the conference on Recent Advances in Rock Engineering (RARE 2016)

+ Advanced search
97 articles

Recent advances in excavation, design and support methods: A case study of Mangdechhu Project, Bhutan

P.K. Mishra, R.K. Chaudhary, P. Punetha
Construction of hydro power projects in the Himalayan region poses various problems which can have direct implication on the cost and time schedule of the projects. Varying geological conditions necessitate use of modern methodologies for ensuring stability and overall time bound completion of the project...

3D-Numerical simulation of a mine using cohesion-softening, friction-softening and hardening behavior

P.K. Rajmeny, PK Jain, Vakili Abouzar
Numerical modeling is a potent tool to evaluate stability and to assist in long term planning of a mine along with predictive modeling of planned mining situations. However, selection of proper input properties regarding the rock mass still intrigues the Rock Mechanics community. A well-documented case...

Application of block tectonic model and interblock tectonics at Koteshwar Dam Project

Bahuguna Harish
The concept of evolving a block tectonic model for a high concrete gravity dam located in a dynamically evolving Himalayan terrain has been attempted for the first time in the Indian context. Precise delineation of the lithounits, demarcation and ordering of discontinuities and mega shear zones at the...

Causes, impact and control of overbreak in underground excavations

H.K. Verma, R.D. Dwivedi, Roy P. Pal, P.K. Singh
Drilling and blasting has been a preferred method of rock excavation world-wide. Blasting inevitably causes damage to the peripheral rock mass, which culminates in the form of overbreak and damaged zone. Damage or overbreak not only endangers the safety of structure and cost escalation but also delayed...

Innovative rock support under flowing water conditions in underground caverns

Pal Saikat, G. Kannan, Rath Ranjit, Nanda Atul
Underground construction of tunnels and caverns is an ever challenging project by virtue of the likelihood of encountering uncertain ground conditions. This is true despite all advancement in the field of prediction tools, equipment and instrumentation. One major factor leading to such uncertainties...

Verification of the deflection measurements method in the Lebanese soft rocky geo-material in excavation

Kazan Youssam
In order to validate the design of retaining systems in deep excavation, measurements of site deformations become necessary. Usually, horizontal displacements are measured using inclinometers and vertical 6x6 cm steel gains. These gains are often installed in the rigid or flexible vertical concrete element....

Engineering geology for weak rocks of Abu Hamour surface and ground water drainage tunnel Phase-1, Doha, Qatar

J.B. Stypulkowski, A.K. Pathak, F.G. Bernardeau
This paper discusses results of analysis from geotechnical database collected during field mapping of shafts in weak/soft rocks of Abu Hamour tunnel project area of South Doha, Qatar. Shafts are connected to the main tunnel by short tunnels – adits, excavated using sequential excavation method. Shaft...

Rib geomechanics: Its impacts in coal pillar extraction

Singh Satyendra K, H. Agrawal, A.P. Singh
In Bord & Pillar (B&P) depillaring, there are redistributions of mining-induced stresses on acontinual basis, primarily with apronounced effect on the natural supports - ribs and stooks. A rib need to be stable on temporary time-frame such that (a) it should provide adequate safety to men and machines...

Construction and operation of high capacity longwall project – Adriyala experience

Kumar B Ramesh, S. Chandrasekhar, Reddy B Veera
In India, lot of coal reserves exist up to 300m depth, are more amenable for extraction by opencast mining. Bulk production is possible with Opencast mining, with low gestation period, more safety and high percentage of extraction compared to underground methods. Hence coal operators are inclined towards...

Rock slope stabilisation – Case study of a weathered sandstone slope along the railway in Bavaria, Germany

Dutta Lopamudra, Singha Gourango
Due to the fact that the German Railroad reduced the maintenance work on the important railway line Nuremberg – Regensburg, section Deining - Batzhausen they had several cases with blocks laying at the tracks. Therefore they decided to stabilize the 70° steep weathering prone sandstone slope. As a protective...

Numerical simulation of roof bolt system during depillaring operations in bord and pillar panel

Hasim Rizwan, Jaiswal Ashok, B.K. Shrivastva, Jena Satyabdi
Roof bolting technology is widely used for support design in an underground coal mine. This paper focused on the numerical simulation considered the behaviour of roof and rock – grout – bolt interaction.Simulation of three dimensional model of depillaring panel with roof bolt support is difficult to...

Post-failure fatigue behaviour of intact sandstone from burst prone coal mine in Ostrava-Karvina Coalfield

M.N. Bagde
In the literature, mostly, pre-failure behaviour of the intact rock in static and rarely in cyclic loading is reported. In various earlier publications on the subject by the authors, pre-failure fatigue behaviour of intact rock is discussed. The post-failure behaviour of the intact rock in the laboratory...

Controlled blasting for safe excavation of a portion of irrigation canal in close vicinity of a village

Raina Avtar K, Wankhede Pankaj, P.K. Singh
A canal was proposed to be excavated by blasting nearby a village with hutments and an overhead water tank in very close proximity. The structures mentioned were as near as 18 m from the proposed excavation. Trial blasts were conducted by CSIR-CIMFR to ascertain the vibration attenuation parameters and...

Stability analysis of old underground coal workings using Wireless Sensor Networks

Dorthi Kumar, Chandar K Ram
In recent times, many old underground coal mines are being converted into opencast workings. In the process, removal of waste rock over the old galleries and maintaining a stable slope is a very difficult task. In such cases, continuous slope monitoring may be required. Though there are many methods...

Hydro-fracturing test in sandstone rock mass: A case study from Himalayas

G.V. Ramana, Pathak Shashank, K.K. Mishra, Dev Hari
Rock mass are naturally occurring construction materials which are subjected to in-situ stresses. In-situ stresses occur due to the weight of overburden and tectonic stresses. Prior knowledge of in-situ stresses is important before aligning the longitudinal structures in rock mass such as tunnels and...

Stability analysis and design of slope reinforcement techniques for a Himalayan landslide

Pandit Koushik, Sarkar Shantanu, Samanta Manojit, Sharma Mahesh
In the present study, slope stability analysis has been carried out for Pakhi landslide, atPipalkoti, Uttarakhand Himalaya, India. The site is situated alongside Chamoli-Badrinath National Highway (NH-58) in the Higher Himalayas. This route has immense importance due to its functional service for both...

Elastic modulus of thermally treated fine grained sandstone using non-contact laser extensometer

N.N. Sirdesai, Mahanta Bankim, P.G. Ranjith, T.N. Singh
Processes such as Underground Coal Gasification (UCG), Enhanced Oil Recovery (EOR) and underground disposal of nuclear waste involve the exposure of the surrounding rocks to extreme temperatures. At such high temperatures, the rock suffers substantial structural damage due to the anisotropy in the geotechnical...

Analysis of un-tensioned fully grouted rock bolt – A case study

Singh Deepanshu R, Mishra Arvind K, Agrawal Harshit, Manna Chanchal
Stability of structures in any mining excavation is critical and roof rock stability has long been the primary concern in all underground excavations. There are plenty of supports systems that has evolved over the years, among them rock bolts are widely used support system in mining and various civil...

Shear behavior of planar unfilled rock discontinuities with reference to surface morphology under constant normal load

Singh Hemant Kumar, Basu Arindam
Stability of rock masses at shallow depth is often controlled by shear behavior of discontinuities. This is an important issue in an engineering environment as well as from societal point of view. With regard to shear behavior assessment through laboratory investigation, direct shear test under constant...

Identification of lineaments using Google Tools

N. N Rana, C.P. Chakravarthy, R. Nair, Kannan L Gopi
Recent advances in data acquisition technologies, have led to a growing interest in capturing high resolution rock surface images, Digital geologic maps that use a virtual globe interface, like google earth are a relatively new medium for presenting geologic data and interpretations. Models viewed in...

A study on the need of assessment of settlement properties of coal mine waste dumps

R.M. Bishwal, Sen Phalguni, M. Jawed
Mining of coal deposits in excess of half a billion tons has resulted in a massive volume of coarse overburden (OB) material that is posing challenges in sustainable practice of waste handling and management. Ever increasing land demand for industrial or domestic purposes, mostly in urban or densely...

Rock mass characterization of rock ledge in power house cavern at Shongtong Karcham Project, Himachal Pradesh

Ilamkar Prashant T, Singh Shyam Sundar
All the surface as well as underground hydropower stations has Electrical Overhead Travelling (EOT) cranes to facilitate erection and maintenance of the generating equipment. In the powerhouses built over ground, such cranes run on column and beam frames, provided for supporting the roof structure. However,...

Geotechnical investigations for locating an underground powerhouse in calcareous rocks, Himachal Pradesh, India

Sayeed Imran, Khanna Rahul
The case pertains to a hydroelectric project (520MW) located in Kullu district of Himachal Pradesh. During the feasibility stage, surface powerhouse was proposed with an option of an underground alternative as well. In the detailed project report stage, when extensive investigations were undertaken for...

Advanced seismic investigations during construction of hydro tunnels

Dickmann Thomas, J Hecht Mendez, Choudary Kripal, Rahbar Ataollah
In order to maintain the economic and safety demand in underground projects for hydropower there is a vital necessity of advance geological prediction by using the seismic reflection prediction technique. Tunnelling in many projects suffered due to uncertain or even unknown geological problems such as...

Influence of foliation on excavation stability at Rampura Agucha underground mine

P. Yadav, A. Panda, M. Sonam, B. Banerjee, S. Parihar, D.C. Paneri
Rampura Agucha mine is exploiting the world's largest Pb-Zn deposit and is currently in progress of transitioning from open cast to underground mining. Underground ore access development is primarily developed through foliated strata of a moderate strength which pose many challenges.Rock mass response...

Practical experiences of instrumentation and monitoring for depillaring

Kumar Ashok, Singh Arun Kumar, Ram Sahendra, Singh Amit Kumar, Rajendra Singh
The challenging nature of strata dynamics in and around goaf edge of a depillaring operation warrants continuous vigilance over the dynamics for a safe and efficient working. Depending upon the nature of the working and surrounding rock mass, a variety of geo-technical instruments are, generally, deployed...

Electronic detonators ? A tool for mitigating mining costs & risks

P.V.S. Sarma, A.M. Kazmi, A.D. Sao
Mining is a hazardous activity and capital intensive in nature too.  The cost of stoppage of mines, for any reason, for few hours is enormous. The mines need to minimise the stoppage times to improve productivity and to reduce costs. Mining companies should have to go for large size blasts to achieve...

Three-dimensional simulation for the rock fragmentation induced by TBM with GFEM

X.Y. Xu, X.H. Tang, Q.S. Liu, G. Singh
Theory about the interaction of TBM disc cutters and rock mass is critical for the design of the TBM machine. The numerical model of the interaction between cutters and rock, has important theoretical and practical meaning for developing a complete forecasting model of TBM performance. In this paper,...

Successful excavation of Surge Shaft in weak rock mass: A case study of 240MW URI-II HE Project, NHPC, J&K

Kumar BNS Naveen, Sahoo Radhendra Narayan
Surge shaft serves to absorb the hammering effect of water from pressure tunnel generated due to the sudden stoppage of turbines, by accommodating surges/mass oscillations during load rejection/acceptance until the conduit velocity attains a steady state in water conductor system of a hydel Project....

Numerical modelling based rock load height estimation at the goaf edge in a mechanised depillaring panel

Ram Sahendra, Kumar Dheeraj, Kumar Rakesh, Kumar Ashok, Rajendra Singh
Presence of different openings along the extraction line (goaf edge) in a mechanised depillaring (MD) panel provides an easy path for the goaf to encroach the working area during caving. A number of continuous miner based MD operations are adopted in Indian coalfields in last thirteen years, where roof...

Classification and selection methodology for temporary support systems for underground structures

Kumar Manoj, Prasad Jitendra, A.K. Naithani
In this paper a new methodology for evaluation and classification of support system that can be applied to rock tunneling is discussed. It is of great importance to consider long-term stability of rock mass around the openings of underground structure, during design, construction and operation. Varying...

Design of embankment for safe back filling in opencast mines – A case study

Behera Santosh Kumar, C.N. Ghosh, P.K. Mandal
Disposal of coal ash generated by thermal power plants is a challenge now days under rigid environmental norms. The conventional method of disposing in ash ponds leads to requirement of huge amount of valuable land and it have adverse effect on air, ground water and soil. Hence, the need of the hour...

Performance of primary tunnel support systems under seismic loads in weak rock masses

R.B. Jishnu, Ayothiraman Ramanathan, Shaz Ahmed, Patra Chayan, Salu Ghosh
With the decrease in the over ground utilizable space and increase in growth of metro structures, cut and cover structures are becoming rather impossible to conceptualize and construct. Hence they are slowly replaced by underground openings made by NATM methods. These tunnels could be using rock bolts...

Effect of fluid additives on rock drilling

Rohit Rawal, N.C. Karmakar, S.K. Sharma
Drilling is a very dominant operation in all rock cutting industries, namely, mining, petroleum, natural gas and civil engineering. The objective of this study is to understand the behaviour of rock drillability by mean of penetration rate of bit, with concentration of 10 ppm of carboxymethyl cellulose,...

Robust geotechnical design of rock bolts for stability of rock slopes using response surface

Pandit Bhardwaj, Raju G Doraiswamy, Babu GL Sivakumar
Stability of rock slopes in many civil engineering projects involves installation of rock bolts for stabilization. Uncertainty in input parameters that determine the stability of rock slopes may lead to uncertainty in evaluating the factor of safety. Design of installed rock bolts must be optimized for...

3D modeling of the fracture zones to decipher foundation level at Barethi Super Thermal Power Project, Madhya Pradesh, India

Chavhan Rashtrapal H, Sakhare Vishal V
The proposed 6x 660 MW Super Thermal Power Project is located near village Sandni and Barethi in Rajnagar Tehsil of Chhatarpur district, Madhya Pradesh. The terrain belongs to Bundelkhand Granite Massif (BGM) comprising a variety of medium to coarse grained granites. The Project site is mainly covered...

Stability of pillar between two caverns with dyke intrusion - A case study

P Nareen, M. Mahalakshmi, S. Shasank, K John, B. Abhishek
This paper presents numerical analyses for the stability of a pillar between two caverns in an underground oil storage project. The geological condition of this pillar reveals two major lineaments (intrusive bodies) intersecting each other between two caverns, which results in dislocation of dykes and...

Performance of polyurethane grouting to handle heavy seepage in tunnels

N. Rana, R. Nair
Fault zones, shear bands, underground water channels and other features in the Himalayan geology have made tunneling a very complex activity in the region. The major hydropower projects present construction problems but also render the project economically tough to handle. A case study is presented in...

Application of nanotechnology for underground roof bolting

Ramayya M S Venkata
Rock re-inforcement in Underground Coal mining is generally being done by roof bolting. Roof bolting is a pre-requisite and important activity for safety and high percentage of productive extraction of the Coal from Underground Coal mining. Nanotechnology and Nanoscience is the latest development in...

Engineering geological consideration of a deep pump house foundation floor: Case study of lift irrigation scheme

L.G. Singh, A.K. Naithani, Rawat Devendra Singh, Jain Prasnna
Geological mapping of deep foundation floor is essential to provide permanent data set for geological interpretation. A deep pump house (94 m long x 20 m width x 78 m deep) of Mahatma Gandhi Kalwakurthi Lift Irrigation Scheme-II (MGKLIS-II) wasconstructed at Mahaboobnagar District in TelanganaState for...

Tunneling through adverse geological conditions in granitic terrain

D.S. Rawat, A.K. Naithani, L.G. Singh, Jain Prasanna, Rajesh Patel, Rao G. Srinivasa, Singh Khilap, Nath K. Ravindra, R.N.S. Babu
Generally it is pre mind setup that granitic terrain is always suitable for tunneling media and requirement of detail feasibility studies are minimize accordingly. To facilitated irrigation and other utility en-route of seven draught prone Districts of Telangana State, Dr B R Ambedkar lift irrigation...

Advanced vibration management to improve productivity and optimize cost for excavation of iron ore: A case study

Mukherjee Debashish, Kumar Rajesh
Amajor concern in deep hole blasting in open cast mining operation is the excessive generation of ground vibration and their effect on nearby industrial infrastructures and residential dwellings of local community. A poor blast output results in lower productivity of excavators which has a paramount...

Review of IS 9012:1978 "Recommended Practice for Shotcreting" - Recommendations for inclusion and amendment

T.R. Subash, M. Ananth, K. Tamilselvan
There has been a rapid advancement of shotcrete technology in international sector since the first Indian shotcrete code was published. Recommended practice for shotcreting (IS 9012) was first published in 1978 and reaffirmed in 2002. The provisions in certain clauses of this code are inadequate. Hence,...

Kinematic stability analysis of multi-faced rock slopes in the Himalayas

Singh Tarun, K.S. Rao
For the assessment of natural stability of rock slopes, Kinematic analysis technique is extensively used. This technique makes use of dominant discontinuity planes within slope mass to forecast the probability of sliding, wedging and falling. This probability is given in the context of the attitude of...

Optimisation of orientation for large underground caverns

Dev Hari, Singh Rajbal, S.K. Sati
This paper highlights the role of stress measurements and wedge analysis for optimisation of orientation for underground desilting chambers and power house complex of hydropower development in the Himalayas. In-situ stress measurement tests were conducted using hydraulic fracturing technique in vertical...

Simulation of crack propagation in rocks by XFEM

G. Sivakumar, V.B. Maji
Understanding the failure mode and crack propagation in rock can provide useful information for safe and economic design of various structures in rock. Many researchers have developed theoretical criteria for rock failure with crack growth based on experimental observations. Numerically using cohesive...

Assessment of frictional resistance of granite rock joints with reference to weathering

Ram Bikash Kumar, Basu Arindam
Shearing resistance of rock joints is considered as one of the key aspects of rock masses as it is related to the stability of rock mass particularly at shallow surface condition. The shear behaviour of rock joints depends upon a number of influencing parameters and weathering state of discontinuity...

Assessment of cavability and categorization of coal measure roof rocks by parting plane approach

Banerjee Gautam, D. Kumbhakar, N. Ghosh, K.P. Yadava
From the observations of caving of the overlying roof rock in longwall panels it can be inferred that the caving is dominated by the weak parting layers, laminated nature and massiveness of the roof rock formation. This caving process is controlled by the presence and geo-technical properties of strong...

Acoustic emission monitoring on Delhi quartzite under compressive loading

Negi Prateek, Chakraborty Tanusree
The acoustic emissions are the high frequency waves caused by the sudden release of energy from local points within a loaded rock specimen. In common terms these emissions can be related to the formation of microcracks within the rock structure. As the failure propagation in a brittle rock is very much...

Tunnelling Hazard in the diversion tunnel of sengulam augmentation scheme, Idukki District, Kerala

K.R. Praveen, C.S. Vishnu, C. Thanavelu
A free flow diversion tunnel is designed as a part of Sengulam Augmentation Scheme envisaged to increase the storage in an already existing reservoir at Sengulam, in turn power generation by transferring water available at Kallar River Basin. The tunnel is driven through gneissic bedrock with granite,...