Browsing Departmental Conferences by Author "Dharmaratne, PGR"

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  • Design and fabrication of cable bolt for excavation in a fractured rock 
    Dhanawardana, YLC; Siriwardana, HDPM; Henderson, SH; Kumara, HMCP; Indika, KAS; Dharmaratne, PGR; Welideniya, HS; Rohitha, LPS [Conference-Abstract]
    In fractured rock masses, large excavations have an unsupported stand-up times Jess than the minimum time required to support the roof after the excavation. Therefore, the principal objective in the design of a support ...
  • Determination of the Specific Charge in Sri Lankan Quarrying Industry and Tunnelling Practice 
    Fainaz, MIM; Premathilaka, SDNN; Faslan, ACM; Gayan, WAMS; Gugathasan, N; Hemalal, PVA; Dharmaratne, PGR [Conference-Full-text]
    At present, Sri Lanka is investheavily on the development of the country’s infrastructure., facilitating the vast demand for construction materials particularly, aggregate metals. Blast fragmentation is one of the most ...
  • Effects of joint orientation in tunneling 
    Selvasekaran, R; Appuhami, KAIS; Kumarasiri, SAI; Fernandopulle, SN; Lakmal, HMAG; Dharmaratne, PGR [Conference-Full-text]
    This research is focused on the effects of joint orientation with respect to the direction of tunnel axis. It is expected that the stability of surrounding rock is affected by the strike and dip of the joints and the ...
  • Mine cost control through effective mine drainage at Bogala mines-phase 1. 
    Uddika, JI; Samarakkody, IC; Harinth, PR; Dharmaratne, PGR; Hemalal, PVA; Thanansayan, G [Conference-Full-text]
    The Bogala Graphite Mines in Sri Lanka is experiencing a considerable water flow problem for more than two decades which has resulted in increasing total production cost due to high dewatering cost. This case study was ...
  • The Optimization of field parameters of non-explosive demolishing agent. 
    Silva, DWGSL; Wickramage, KMJP; Vithanage, KS; Hemalal, PVA; Dharmaratne, PGR [Conference-Full-text]
    Demolition of concrete and rock is a common pI:.ocess in many construction, renovation and rehabilitation projects. Non-explosive Demolishing Material (NEDM) has been a popular alternative for explosive or mechanical ...
  • Performance evaluation of emulsion/water gel explosives and comparison with dynamite in Sri Lankan quarrying/mining practices. 
    Kumarage, P; Edirisuriya, EMTG; Wanniarachchi, AM; Hemalal, PVA; Dharmaratne, PGR [Conference-Abstract]
    In the Sri Lankan context, Gelatin Dynamite has been one of the widely used explosives far rock blasting purpases. Water-gel (WG) explosive is in the process of being introduced to. the Sri Lankan mining industry. So. far ...
  • Underground Mine Cost Control through Proper Mine Drainage- Bogala Mines 
    Ahmed, AI; Norbertsan, JR; Sabry, MIM; Sandaruwan, MWMS; Morayas, MMST; Dharmaratne, PGR; Hemalal, PVA [Conference-Full-text]
    A Bogala graphite mine is located in the Kegalle district, Sri Lanka. Bogala mines has been experiencing a considerable water inflow during the past many years, involving a significant cost on mine dewatering compared to ...
  • Ventilation of underground workings and improvement of comfort levels 
    Hewage, SC; Rajapakse, RAAC; Rathnayake, RMD; Prasanna, EAP; Dissanayake, DMAK; Dharmaratne, PGR; Welideniya, HS; Rohitha, LPS [Conference-Full-text]
    Ventilation of underground mines is required to dilute and remove hazardous gases, control heat and provide oxygen for workers and machinery. Kahatagaha- Kolongaha mines, Dodamgaslanda was selected for the present study ...