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By C. Chope

The Minister for Roads and Traffic's opening speech highlights some of the topics to be covered in the conference with particular reference to the Channel Tunnel, the recent breakthrough of whose service tunnel marked a historic moment three and a half years after passing of the Channel Tunnel Act and which was the first example in recent years of a major transport project entirely privately funded. The Minister also mentioned the building of UK road tunnels, research and development, and the role of UK consultants in the single European market

Jun 13, 1905

By R. H. . T. Garnett

Contributed remarks on paper published in the Transactions, Mining industry section, vol. 100, September- December 1991, A121--45

Jan 12, 1992

By A. Sutherland Strachan

Before regulations governing the work on the mines, it was not uncommon in the Rand for a miner to die within a period of 2-3 years as the result of exposure to dust. This paper considers mine and tunnel conditions promoting silicosis and measures to avoid dust exposure in the Rand, South Africa.The relationship between blasting and lung lesions is explored. Evidence is presented that improved working conditions and lowered dust levels reduce the incidence of silicosis.

Jan 1, 1947

By P. W. Edwards

"This paper summarises many experiments conducted, and how in North American industry the use of aluminium in treatment and prevention has been adopted widely. The Pottery Insurance Co., Ltd., made it possible for me to investigate conditions in Canada and the U.S.A., and I thank them for permitting me to submit this short paper- an abstract of my report to them."

Jan 1, 1947

By R. W. Ruddle

"Besides copper, iron, silicon, and oxygen, a large number of elements may be present in copper ores, the more important of which are zinc, lead, arsenic, antimony, bismuth, selenium, tellurium, nickel, cobalt and the precious metals; impurities of less importance are calcium, magnesium, aluminium, barium, sodium, potassium, manganese, lithium, fluorine, titanium, uranium, vanadium, tin and molybdenum. All of these elements are eliminated to some degree in the subsequent roasting, smelting and converting operations.Information on the elimination of impurities during the smelting of copper is surprisingly meagre, however, rather more information is available on impurity removal during the smelting of the ore in reverberatory or blast furnaces."

Jan 1, 1953

By C. E. Dunn

Paper presented at the 28th International Geological Congress held in Washington DC, July 1989 (International geochemical mapping sessions). Evidence is accumulating that reconnaissance-level biogeochemical sampling can provide valuable insight into the chemistry of the substrate. Problems such as seasonal variations in plant chemistry and the lack of a universal biogeochemical sample medium may be circumvented by adopting normalising procedures. The planet can be divided into a few climatic zones, each of which is characterised by one or two common plant genera. If it can be demonstrated that the chemical differences between certain species of a single genus are small - as is suggested by studies of boreal forests - it would seem feasible to apply biogeochemistry as a low-density geochemical mapping tool. The technique could prove particularly useful for assessing the substrate chemistry of areas of dense forest, rugged terrain and difficult access by employing airborne sampling of trees from helicopters

Jul 1, 1991

By C. J. Kirkland

25th Julius Wernher memorial lecture given at Tunnelling '91, sixth international tunnelling symposium held in London, 14-18 April 1991. The title gives the lecturer a chance to share some of the lessons he has learnt in a lifetime of tunnelling and particularly in the last six years of his involvement with the Channel Tunnel and the International Tunnelling Association. These included: the difficulties of split contracts but the problems arising with Eurotunnel over the need to create a single owner to whom the banks could lend; the peripatetic nature of tunnellers who built London's underground in the 1960s and returned to build the Channel Tunnel from Egypt, Singapore, Hong Kong and Australia; the increasing requirement for strategic planning resulting in tunnels between European countries and the need for engineers to deal with decision-makers; EU work on harmonising regulations so that there need no longer be, for example, arguments over which regulations should be followed for temporary electrical equipment in the section of the UK tunnel that is technically in France; the huge improvements in safety standards and attitudes; the enormous increase in the scale of undertakings and individual contracts, with an accompanying change in attitudes to logistics; technological advances to cater for the high performance now required of equipment; and the rising importance of environmental issues. The lecturer also briefly touches on the work of the International Tunnelling Association

Jun 13, 1905

By J. R. Budden, P. A. Spencer, J. Barrett

The initially produced arsenic (III) is very toxic to the unconditioned culture but the mixed culture has the capacity to oxidise it to arsenic (V) in the presence of iron (III). It was possible to build up the resistance of the culture through progressive sub-culturing on arseno-pyrite until it could tolerate steady-state concentrations of 30 mM arsenic (III) and 200 mM arsenic (V). With some samples tested in the continuous systems the final arsenic concentrations reached 330 mM. It proved possible to use the laboratory batch data to establish the optimum operating conditions for continuous test systems with capacities of up to 32 m3. Data on the residence time, oxygen uptake rates and gold extraction from the bio-oxidised residues could then be confirmed by continuous testing without the need first to use empirical means to determine optimum conditions for continuous bio-oxidation. The data on residence time, oxygen uptake rate, solids density and neutralisation could be used to estimate the capital and operating costs of treating any given tonnage of the concentrate of interest. It was established that the arsenopyrite concentrates can be suitably bio-oxidised to cause the liberation of at least 90% of the gold content. The method is simple to operate and is flexible over a wide range of external conditions

Apr 1, 1991

By E. J. Bolitho

"The paper covers the activities of the Government Miners' Training-Schools. It argues that its success is proved by the steady demand for miners trained at the Schools; by the large numbers of ex-apprentices who hold responsible official positions in the industry; and bv the probable expansion of the organization in the near future to meet the never-ending call for trained personnel."

Jan 1, 1947

By M. G. Fleming, F. Warner, R. W. Boswell, M. J. Cahalan

The annual dinner of the Institution was held at the Savoy Hotel, London W.C.2, on 22 April, 1971. The President, Mr. M. J. Cahalan, was in the Chair; members and guests numbered 320. The toasts of The Queen and Queen Elizabeth The Queen Mother, Prince Philip The Duke of Edinburgh, The Prince of Wales, and the other Members of the Royal Family were proposed and loyally honoured. R.W. Boswell proposed the toast of the Institution of Mining and Metallurgy, the president responded, Professor M.G. Fleming proposed the toast of the guests and Sir Frederick Warner replied

Dec 1, 1971

By T. J. White, R. A. Farnfield

Early computerised blast monitoring equipment consisted of a digital version of the existing analogue machines with, perhaps, a few enhancements. Many additional facilities have since been developed to enable the efficient collection of high quality data. These developments are examined with reference to digital sampling, triggering systems, the storage of complete recordings and signal processing. Recent advances have been made in the use of blast monitoring systems that comprise multiple blast monitoring locations with centralised control and data collection. Software has been developed to help record blast parameters and assess environmental effects. Computer databases have many advantages over their paper counterparts. Data can be easily retrieved and processed. The scaled distances used in the prediction and control of peak particle velocities can be calculated rapidly when the data are obtained directly from a database. Since the whole vibration signal can now be recorded, signal processing can be used to provide information such as signal length, dominant frequency and response spectra.

Jan 4, 1993

Discussion of papers with authors' written replies and closing remarks.

Jan 1, 1947

By D. L. Buchanan, ed. sci.

The issue comprises 10 contributions on PGE mineralisation, of which 9 were presented at the symposium organised by the IAGOD Commission on Ore Deposits in Mafic and Ultramafic Rocks and the BRGM-CNRS University of Orleans research group. The editor's introduction and summary of the papers is presented together with the title page, contents list and cover photograph of a harzburgite ridge, dunite boundary and chromite quarry in the Shetland ophiolite on Unst

Apr 1, 1994

By Fearnside W. G.

Further discussion at the Midland Institute of Mining, Civil, and Mechanical Engineers' general meeting held in Leeds, March 21st, 1916, with T. Beach, vice-president, in the chair, of a paper published in Trans. Inst. Min. Engrs., 1915, vol. L, p. 573 and discussion vol. L., p. 109 and 608, comprised a brief written contribution by Faulds A.

Dec 1, 1916

By J. Gough M. D.

There are many points still obscure regarding the nature of coal-workers'- pneumokoniosis, but the interpretation of the disease has been greatly clarified in recent years. It is now known that exposure to fumes or gases or other conditions peculiar to coal-mining are not necessary factors in the production of pneumokoniosis. The same disease occurs in coal-trimmers working in the docks, and it is thus established that the inhaled dust is the primary factor. On the other hand, there is no completely satisfactory explanation of the distribution of the disease. Geological and petrological studies have not given an unequivocal explanation of the difference in incidence in different parts of the coalfield. It is an open question whether the quantity of dust inhaled is more important than its chemical composition. However, there is ample evidence from the medical side that elimination of dust and of tuberculosis from the environment of coal workers will be required to prevent pneumokoniosis. Much is being done with regard to elimination of dust, and a similar energetic action is required in regard to tuberculosis.

Jan 1, 1947

By G Fakes

This paper describes the history of civil engineering tunnelling and developments in soft ground techniques during the 19th and 20th centuries, culminating in the design and use of high speed tunnelling machines for all types of ground conditions. Some of the problems encountered are outlined, and descriptions are given of some contemporary developments in rock tunnelling techniques, with comparisons of methods used in the mining industry.

Jan 5, 1996

By Schwartz M.

Madagascar's democratic election has led to a return to its position as a preferred trade partner with the USA and a priority market with Canada. Michael Schwartz takes a look at two key mining projects in this recently reinvigorated country

Feb 1, 2015

By J. P. Rees

Describes methods of dust-sampling such as weighing the dust caught on cotton-wool, the sugar tube, konimeter, circular konimeter and the thermal precipitator. Covers the work of mine dust inspectors, the Miners' Phthisis Prevention Committee and the Chamber of Mines Dust Department.

Jan 1, 1947

By M. C. Amiri

The plant produces 130 kg slag per tonne of crude steel, to add to the basic oxygen steel-making converter slag stockpile of around 2 500 000 t. The slags contain 1.81% V2O5, which can be rendered water-soluble by salt roasting with NaCl and an alkali such as Na2CO3. Preliminary tests gave less than 3% V recovery from slag under optimum roasting conditions when NaCl, NaCO3 or Na2SO4 was used, but showed that sodium phosphate could make all the V water-soluble when roasted with slag in a ratio of 3:1 at 1 100-1 200 degrees C. Almost complete leaching was obtained within 2 h with water at boiling point. Sodium vanadate was precipitated by acidifying the leach liquor with HCl to a pH of about 2.2

Jun 21, 1905

By P. A. Wright

The note describes the steps involved in the combination of results reported by Shiraishi and Bell in 1968 and 1970 and by Mills and Turkdogan in 1964. Shiraishi and Bell derived from their vapour-pressure measurements an expression for the activity coefficient of tin implying that the miscibility gap in the two-liquid region is symmetrical about the N = 0-5 axis. The limits of the miscibility gap were reported by Shiraishi and Bell and measurements were reported graphically by Mills and Turkdogan. Least-square parabolas are fitted to the transformed results of Shiraishi and Bell and of Mills and Turkdogan for the miscibility gap in the liquid tin-iron system. Back-transformation from these curves gives limits at 1438 K and equations are derived that appear to be a fair average of existing data, although a third term for the activity coefficient equation needs to be investigated

Dec 1, 1971