2 edition of Recommendations of the Rock Burst Committee, 1964. found in the catalog.
Recommendations of the Rock Burst Committee, 1964.
South Africa. Rock Burst Committee, 1964.
At head of title: Republic of South Africa, Department of Mines.
|LC Classifications||TN317 .S67 1964|
|The Physical Object|
|Pagination||12 p. :|
|Number of Pages||12|
|LC Control Number||79315462|
Rock burst definition is - a violent expulsion of rock from the walls of a mine opening caused by heavy pressure on brittle rocks in deep mines where mining has deprived the rock of support on one side. Ed Ward covers the first half of the social history of rock & roll in this definitive book. Beginning in the s when blues, country, and black popular music played over the air waves and the first independent record labels were born, this first volume of a two-part series finishes in December , just as an immense sea-change begins to take hold and the Beatles prepar4/5(57).
Heunis R () A report on the interim conclusions of the rock burst project (–). Rock Burst Project Report No. RP. 37, Chamber of Mines of South Africa, Johannesburg Google Scholar Hewlett P, Flannigan WC () New development on the ISS/ In: COMRO innovation in mining, development and application of new seismic technology for. As a typical failure phenomenon, rock burst occurs in many mines. It can not only cause the working face to cease production, but also cause serious damage to production equipment, and even result in casualties. To explore how to govern rock burst of working face under igneous rock, the working face in some mine is taken as engineering background.
Rock Masses for the Design of Tunnel Support," Rock Mechanics, Vol. 6, No. 4, pp. through Barton, N., Rock Mass Quality and Support Recommendations for Ba-salt at the Candidate Repository Horizon, Based on the Q-System, SD-BWI-ER . Other articles where Rock burst is discussed: seismograph: Applications of the seismograph: Rock bursts, in which rocks are ejected suddenly in deep pits or tunnels, are caused by increase of stress in the surrounding rocks. Experience in mines shows that an increase of small shocks detectable by highly sensitive geophones—portable seismometers for field use—generally indicates a rock.
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The Committee made many recommendations concerning general mining policy, protection of travelling ways, and the stoping out of remnants.
•T heR ockB u rstC m iw and“y q f b v recommendations of the Witwatersrand Rock Burst Committee ()” (Anon ). It was considered. The Committee made many recommendations concerning general mining policy, protection of travelling ways, and the stoping out of remnants.
Rock Burst Committee: The Committee was mandated to “study the question of rockbursts and to revise the recommendations of the Witwatersrand Rock Burst Committee ()” (Anon ). A rock burst is a spontaneous, violent failure of rock that can occur in high-stress gh mines may experience many mining-related seismic events, only the tremors associated with damage to accessible mine workings are classified as rock bursts.
The opening of mine workings relieves neighboring rocks of tremendous pressure, which can literally cause the rock to explode, or. The final part of the book discusses mitigation including best practices for distressing and efficiently supporting rock.
Designed to provide the most comprehensive coverage, the book will provide practicing mining and tunneling engineers the theoretical background needed to better cope with the phenomenon, practical advice from case studies.
Purchase Rockburst - 1st Edition. Print Book & E-Book. ISBNcommittee made many recommendations about general mining policy, protection of travelling ways, and the mining of remnants. The committee was mandated to “study the question of rockbursts and to revise the recommendations of the Witwatersrand Rock Burst Committee ()” (Anon, ).
takes place suddenly a rock burst occurs and causes a tremor.’ The committee recommended the removal of the pillars if they cannot carry the load or the use of sand filling in adjacent areas if they cannot be removed.
The Witwatersrand Rock Burst Figure 1—Fatality frequency rate in the South African gold mines from The report of the committee makes many recommendations about general mining policy, protection of travelling ways, and the stoping out of remnants.
The committee was mandated to “study the question of rockbursts and to revise the recommendations of the Witwatersrand Rock Burst Committee ()” (Anon, ).
fatal rock-burst androck-fall accidents fromananalysis ofman-shifts lost due to accidents at Western Deep Levels over athree-year period. The results are sum-marized in Fig.
A comparison of these non-fatal losses with the fatality losses depicted inFig. 2shows that rock-burst and rock. Rock burst presentation 1. Rock burst MechanismsBY:Saqib Ahmad SakiEG GRAD COLLOQUIUM MS - CV/ES(EGGNC) 2. DefinitionRock burst is considered as a dynamic instabilityphenomenon of surrounding rock mass ofunderground space in high geostatic stress andcaused by the violent release of strain energystored in rock mass 3.
Detailed mapping and examination of the site of a large rock burst at the Lucky Friday Mine, Mullan, ID, demonstrated conclusively that damage was caused by a splitting and buckling failure mechanism initiated by separation of rock into layers along steeply dipping metamorphic shear foliation subparallel to the affected crosscut.
The report of the committee makes many recommendations about general mining policy, protection of travelling ways, and the stoping out of remnants. The committee was mandated to “study the question of rockbursts and to revise the recommendations of the Witwatersrand Rock Burst Committee ()” (Anon, ).
The time was. Rock burst is common in deep underground excavations and is characterised by a violent ejection of block rocks from excavation walls. It is critical to understand the phenomenon of rock burst and.
Anon. Recommendations of the Rock Burst CommitteeDepartment of Mines, Cape Town. Brink, AVZ‘Real time risk assessment of hangingwall/roof stability in deep South African mines’, in M Van Sint Jan & Y Potvin (eds), Proceedings of the Fifth International Symposium on Deep and High Stress Mining, Australian Centre for.
In addition, the effects of rock burst control are tested using multiple methods, either in the stress field or in the energy field. The research findings show that with two deep holes hydraulic fracturing in tectonic stress areas, the direction of the main crack propagation under shear-tensile stress is parallel to the greatest principal.
The development of rock-burst control strategies for South African gold mines. Journal of the Southern African Institute of Mining and Metallurgy Hill, F.G. The results of the study showed that post-rock-burst seismicity was concentrated about 15 to 30 m west of and about 15 m above the rock-burst location.
The pillar is composed of a very hard sericitic-to- vitreous quartzite of a type rarely found in the mine, but that is often found in other district mines having a history of seismic activity.
Last week's violent rock burst at the Hecla Mining's Lucky Friday mine was just one of several catastrophic events this year at the deep underground silver mine in. Rock Burst (Living the West) Hardcover – March 1, by Bert Russell (Author), Marie Russell (Author) See all formats and editions Hide other formats and editionsAuthor: Bert Russell, Marie Russell.
The Martin Marietta SMA/HGMA Titan I was the United States' first multistage intercontinental ballistic missile (ICBM), in use from until Though the SMA was operational for only three years, it spawned numerous follow-on models that were a part of the US arsenal and space launch capability.
The Titan I was unique among the Titan models in that it used liquid oxygen and RP. Get this from a library! Rock burst. [Bert Russell; Marie Russell] -- Bert and Marie Russell offer readers grassroots cultural history in this collection of interviews with ordinary people, who often lived extraordinary lives, in the mining district and neighboring.
Highlights The challenge of rockburst risk control and mitigation is discussed. It emphasizes that effective rock support is the final line of defense to ensure mine safety.
Seven principles for guiding rock support design in burst-prone grounds are presented. These principles help to master the art of rock support in burst-probe grounds.The surrounding rock is extruded into underground open space by severe force during a bump. This event may cause injury or even death to mining workers and it may be the cause of the destruction of the excavation space.
This is the reason Keywords. rock burst, bump, mining, rock mechanics, mathematical and physical modelling.