Rock Excavation Engineering
Rock Excavation Engineering Division

HORG: Dr. Pijush Pal Roy, Outstanding Scientist

Name and Mandate of the Division

(a) Rock Excavation Engineering & (b) Explosive & Explosion Laboratory

Mandate of the Research Group

To be a focused R&D laboratory of international repute having strong visibility to industry and society in Rock Excavation Engineering towards fulfilling national needs and challenges.


Section 1: Rock Excavation Engineering

Important Achievements of the Division:

The division (erstwhile Blasting Department), since its inception in the year 1970, has involved in the operation of more than 400 coal and metal mines and more than 20 prestigious hydroelectric projects in addition to solving optimization and safety related problems for quarrying, tunnelling, metal cladding, railway tracks and over bridges and construction sites. The R&D solutions provided by the division, after implementation, have enabled the concerned authority to achieve better results with enhanced productivity. The Explosive & Explosion Laboratoryhas done enumerable work in testing all permitted explosives being manufactured in the country and has suggesting corrective measures for their better performance with proper safety measures. They have also developed new products with the support of explosive industries.

Our Expertise:

1. Prediction and control of blast induced ground vibration;

2. Optimisation of blast pattern in Dragline and Shovel-dumper faces near dwellings and other constructions;

3. Control of backbreak, overbreak, fly-rock and face geometry in opencast mines;

4. Optimisation of fragmentation in any sort of bench geometry;

5. Blasting with non-electric initiation systems using down-the-hole delays and shock tube;

6. Techno-economic assessment of drilling and blasting parameters;

7. Control of ground vibration and study of structural response;

8. Control of noise, air-overpressure due to opencast blasting;

9. Enhancement of underground production and productivity;

10. Induced caving by large hole underground blasting;

11. Monitoring and prediction of ground vibration, noise and air-overpressure using microcomputer based instruments and their analysis through latest software packages;

12. Air-deck blasting for safe and economic operations;

13. Controlled perimeter blasting for increased pull in underground excavations;

14. Training of blasting officers and staff members;

15. Explosive testing and characterisation;

16. Development of new explosives for Indian mining industries;

17. Training of explosive manufacture on handling & safety aspects.

Published Books:

.

Our Success:

  1. Studied in more than 400 Opencast and Underground mines in India under various complex situations and established optimum blast patterns to enhance production and productivity;
  2. Developed blast damage index to calculate the likely damage to underground openings due to dynamic loading and established the threshold value of vibration (PPV) for different RMR of roof rocks in underground workings for safe and efficient exploitation of coal from opencast and underground mines simultaneously.
  3. Helped the regulatory agency (DGMS) in establishing Vibration Standards now available in INSTANTEL Instruments (BM-III & Window Based Blastware Software)& other standard globally available seismographs;
  4. Published Blasting Guidelines and Text cum reference Books;
  5. Developed Tunnel blast technology under varying rock-geologic conditions for enhanced pull and faster progress;
  6. Developed cost-effective blasting technology using additives in explosives;
  7. Published guidelines for Blasting Gallery methods & induced blasting technologies;
  8. Fragmentation Analysing Scale and fabricated “Swing Compass”;
  9. Developed CMRI Burden & Spacing equations;
  10. Developed field-usable Software packages for optimal blasting;
  11. Publications in International and National Journals of repute.

Section 2: Explosive and Explosion Laboratory

Mandate:

Testing, evaluation, development and investigational research on mining explosives and accessories are the essential blasting tools for safe and efficient production of coal from underground and opencast mines. Hence, this laboratory provides expertise, testing facilities and R&D backing to the manufacturing and user industry related to the development of newer, safer and cost effective explosive products and their effective usage in underground and opencast mines for the improvement of production and productivity of Indian mines. Explosive & Explosion Laboratory is the only laboratory in India to test the explosive products for statutory testing prior to use in Indian underground coal mines safely. Explosive & Explosion Laboratory is the only laboratory in India to test the explosive products for their safe use in Indian underground coal mines.

Important Activities:

1. R&D assistance for underground of newer and safer permitted explosives and detonators suitable for use in underground coal mines.

2. Evaluation and advice on quality of explosive & accessories supplied for use in coal mines for overall improvement of productions and productivity.

3. Investigation into the quality of explosive products involved in the accidental firing in coal mines and to explore the possible causes of accidents and remedial measures to eliminate their reoccurrence.

4. Statutory testing of explosive & accessories.

Important Achievements:

1. Development of non-nitroglycerine based explosive–cord system (Powerring and Powercord) suitable for use in blasting gallery method in underground coal mines.

2. Development of a method of Spacer-Aided-Initiation (SAI) technique and a P5 permitted explosive Pendatyne-HP for achieving longer pull in solid blasting.

3. Development of standard methodology for evaluation of incendivity behaviour of 32 mm diameter cartridges of permitted explosives, evaluation of deflagration characteristics & post detonation fumes of explosives and coal dust explosion tests for detonators in coal dust atmosphere.,

4. Emulcoal – 100 as a P1, Emulcoal – 300 as a P3, and Emulcoal – 500 as a P5 emulsion explosives were successfully developed and got permission for field trials from DGMS.

5. Recipient of “CSIR Technology Award in Physical Sciences including Engineering – 2012”.

6. Patent filed/granted:

a. 1538DEL2005 dated 10-06-2005

b. 2468DEL2006 dated 10-05-2007

c. 5679/CHE/2014 dated 21-10-2015

Technology Developed:

1. Spacer Added Initiation Technique to achieve higher pull in underground coal mines of India.

2. Development of non-nitroglycerine based explosive using FRP tube and cord system (Powerring and Powercord) suitable for use in blasting gallery method in underground coal mines.


NameDesignationEmail & phonePhoto
Head of the Research Group
Dr. Pijush Pal Roy

Briefbiodata
Outstanding Scientist & Head of the Rock Excavation Engineering E-mail : ppalroy@yahoo.com
Phone : +91-326-2296032 (O) 0343-2546749 (O), 09431506000 (M)
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Section 1: Rock Excavation Engineering
Dr. M. M. Singh

Briefbiodata
Chief Scientist E-mail : drmmsingh@cimfr.res.in / mms_cmri@yahoo.co.in
Phone : +91-3262296028 Extn: 4293 (O), 947119233 (M)
Service image
Dr. B. M. P. Pingua Sr. Principal Scientist E-mail : pinguacmri@yahoo.co.in
Phone : 4287 (O), , 9431120845 (M)
Service image
Dr. C. Sawmliana

Briefbiodata
Principal Scientist E-mail : csla_cimfr@yahoo.com
Phone : +91-3262296028 Extn: 4449 (O), 9471191134(M)
Service image
Dr. M. P. Roy

Briefbiodata
Principal Scientist E-mail : mproy14@yahoo.com / mproycimfr@gmail.com
Phone : +91-3262296028 Extn: 4455 (O), 9431315871 (M)
Service image
Mr. Vivek Kr. Himanshu

Briefbiodata
Scientist Service image
Mr. R. S. Yadav

Briefbiodata
Sr. Technical Officer(1) E-mail : rsycfri@yahoo.co.in / rsyadav@cimfr.res.in
Phone : +91-3262296028 (O), 9431318084 (M)
Service image
Mr. R. K. Singh

Briefbiodata
Sr. Technical Officer(1) E-mail : rakesh1_12@yahoo.com
Phone : +91-3262296028 Extn: 4449, 9431315626 (M)
Service image
Mr. N. K. Bhagat

Briefbiodata
Sr. Tech. Officer (1) E-mail : narayan@cimfr.res.in
Phone : +91-3262296028 Extn: 4447 (O), 9430394048(M)
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Mr. P. Hembram Technical Assistant E-mail : hembram4u@gmail.com
Phone : 4449 (O), +918051033359
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Mr. Patit Pawan Mandal Sr. Stenographer (Adm) E-mail : mandal.patitpawan@gmail.com
Phone : 4450 (O), 9431504051 (M)
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Mr. Z. Ahmed Sr. Technician (1) Service image
Mr. Raghubans Sah Lab. Assistant Phone : 4450 (O) Service image
Mr. B. Mahato Lab. Assistant Service image
Section 2: Explosive and Explosion Laboratory
Dr. R. R. Singh

Briefbiodata
Sr. Principal Scientist & Head of the Explosive & Explosion Laboratory E-mail : rrsingh@cimfr.res.in
Phone : +91-326-2296040 Extn:4286 (O), 094711 91449 (M)
Service image
Mr. Gautam Kr. Nandi Sr. Technician (1) E-mail : gautamnandycimfr@gmail.com
Phone : +91-326-2296040 Extn:4286 (O), 09162857446 (M)
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Mr. Banshi Turi Lab. Assistant (2) E-mail : banshi_cimfr@rediffmail.com
Phone : +91-326-2296040 Extn:4286 (O), 09709170265 (M)
Service image
Mr. S. C. Dasaundhi T.S. Gr. (1) E-mail : subhascimfr@gmail.com
Phone : +91-326-2296040 Extn:4286(O), 08002524307 (M)
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18 Results
Sl. No.A brief description of Facilities/ Equipment/Tools/software with photos
Section 1: Rock Excavation Engineering
1
  1. Centre of Calibration of Instantel Seismographs in association with M/s Ultra Enviro Systems. Pvt. Ltd.
  2. Seismographs nearing 30 numbers of M/s Instantel Inc., Canada & M/s White International, USA
  3. High-speed Video Camera
  4. MREL make Data Trap
  5. VOD monitoring instruments
  6. Ultrasonic P & S Wave measuring instrument
  7. Software: WipFrag, JKSimBlast, Fragalyst, CompuBlast, Blastware etc.
  8. Schmidt-Hammer in-situ rock strength tester
  9. Borehole inspection camera.
Section 2: Explosive and Explosion Laboratory
1

Cannon Gallery Set-Up for evaluation of incendivity behaviour of permitted explosives.

2

Coal Dust Test Chamber for evaluation of Incendivity behaviour of permitted detonators in coal dust atmosphere.

3

Multi Compartmented Chamber for evaluation of incendivity characteristics of permitted detonators in inflammable gassy atmosphere.

4

Post Detonation Toxic Fume Chamber for collection of fume samples after blasting.

5

VODMET & DATATRAP-II for measurement of Velocity of Detonation of Explosive products

6

Delay Timer for measurement of Delay Time of Delay Detonators

7

Racken Methanometer for measurement of CH4.

8

Grahm Lawrence Apparatus for measurement of Carbon Monoxide (CO) and UV Spectrophotometer for measurement of Oxides of Nitrogen (NOx).

9

Modified Long Cannon Set up for Deflagration.

10

Nonel Meter for measurement of VOD of shock tube and delay timing of Nonel (DTH & TLD).

11

Cord Relay Tester for measurement of delay timing of Cord Relay.

12

No Fire current & Series Firing Current Tester (DCGT) and Multimeter for assessment of electrical characteristics of detonators.

13

MiniMate Blaster for measurement of blast vibration and

14

12m Drop Test Set-up for assessment of suitability of explosive products for UN recommendation as “Transportation of Dangerous Goods”.

 
Sl. No.NameSponsorDurationObjectiveMajor output(if any)
Section 1: Rock Excavation Engineering
1
Section 2: Explosive and Explosion Laboratory
1Development and evaluation of emulsion permitted (P1, P3 & P5) explosives suitable for use in Indian underground coal mines [CLP/55/2014-15].M/s IDL Explosives Limited, Hyderabad08-09-2014 To 06-09-2017

Development of emulsion permitted explosives of P1, P3 & P5 groups meeting the statutory requirements for use in Indian underground coal mines.

One set of Emulcoal – 100 as a P1, Emulcoal – 300 as a P3 and Emulcoal – 500 as a P5 emulsion explosives were successfully developed and got permission for field trials from DGMS.

2Periodic evaluation and advice on quality of BG explosives and Nonel shock tubes Supplied by various firms to SCCL [CNP/4300/2015-16]M/s Singareni Collieries Company Limited, Kothagudem01-12-2015 To 29-11-2017

Periodic evaluation and advice on quality of BG explosives and Nonel shock tubes     supplied by various firms to SCCL for achieving desired coal production from SCCL mines.

Initially some deviations in their quality parameters were observed which were communicated by SCCL management to the supplier based on our recommendations then improvement was noticed in the subsequent quality evaluation of BG explosives and accessories which helped SCCL in getting desired output from their coal mines.

3Advice on quality of opencast explosives and accessories supplied by different Firms for improvement of productivity of SCCL Mines [CNP/4384/15-16]M/s Singareni Collieries Company Limited, Kothagudem05-05-2016 To 04-05-2018

To give advice on quality of opencast explosives and accessories supplied by different Firms after evaluation of their quality parameters for improvement of productivity of SCCL Mines.

Some deviations in their quality parameters of LDC explosives and Nonels were observed which were communicated by SCCL management to the supplier based on our recommendations. Improvements in the subsequent supply of their products were expected to get desired/ improved production in SCCL open cast coal mines.

4Advice on suitability of permitted explosive and detonator involved in accident at Chattarpur Mine No.1, WCL for use in underground coal mines [CNP/4394/16-17]M/s Western Coalfields Limited, Pathakhera Area15-06-2016 To 14-02-2017

To advice the suitability of permitted explosive and detonator involved in an accident at Chattarpur Mine No.1, WCL for use in underground coal mines.

The evaluation for their suitability is in progress.

5Investigations into safety, performance and efficacy of permitted explosive and detonator involved in accident at Chattarpur Mine No.1, WCL for use in underground coal mines [SSP/126/2016-17].M/s Western Coalfields Limited, Pathakhera Area15-06-2016 To 14-02-2017

Explosive and detonators, which were involved in an accident at Chattarpur Mine No.1, were seized by DGMS. Seized as well as additional samples have been sent to CIMFR, Dhanbad by WCL management for investigations into their safety, performance and efficacy to assess their suitability for use in underground coal mines.

The evaluation for their suitability is in progress.

6 Results