Methane drainage from gassy western US coal seams

121A 912463 Bacterial degnsification of coal seams Arya, P K; Saroj, K K; Thakur, D N; Banerjee, S P Proc MMIJl l M M Joint Symposium, Today's Technology for the Mining and Metallurgical Industries, Kyoto, 2-4 October 1989 P443-451. Publ London: MMIJ/IMM, 1989 The control of methane emission in development headings in gassy coal seams has remained a major problem in many mines. The usual method of control is dilution of methane liberated or advance drainage through boreholes. Methane utilisers, though widely spread in nature, have only recently been exploited for degradation of methane in coal mines. The isolation, purification, and adaptation of these bacteria for methane degradation are discussed. 912464 Methane drainage from gassy western US coal seams Hucka, V J; Bodily, D M Proc M M I J / I M M Joint Symposium, Today's Technology for the Mining and Metallurgical Industries, Kyoto, 2-4 October 1989 P453-460. Publ London: MMIJ/IMM, 1989 Methane gas retained in gassy coal seams is a valuable source of clean energy. However, methane is also a potential safety hazard. Its removal prior to mining improves mine safety by reducing the potential for explosions and decreases ventilation costs. A method of field evaluation of methane content in some western US coal seams is presented. Results of premining degasification in seams of similar methane content are described. Geological features such as joints, fractures, and cleats affect coal permeability and thus design of drainage borehole patterns.

912467 Proposed crude oil storage in underground rock caverns at Uran Iyengar, M; Soni, A S; Malkani, S; Sharma, A K; Ramakrishna, K S Proc International Symposium on Underground Engineering, New Delhi, 14-17 April 1988 VI, P441-447. Publ Rotterdam: A A Balkema, 1988 Storage of oil products in unlined rock caverns is widely practiced. Preliminary studies for such caverns in basalt rocks of the Deccan Trap in India are described. The project, local geology and hydrology, finite element analysis to aid design and orientation of caverns, predicted groundwater inflow, and risk analysis under normal and seismic conditions are discussed.

912468 The viability of building rock caverns for retail complexes in Hong Kong McFeat-Smith, I

Proc Seminar Rock Cavern-Hong Kong, Hong Kong, 8-9 December 1989 P45-55. Publ London: IMM, 1989 An alternative method of constructing large commercial developments in Hong Kong is presented. From work carried out for the building of the mass transit railway, it has been established that, at certain centrally located sites within the urban areas, conditions are suitable for the construction of large rock caverns. A survey has been carried out at some of these sites to determine the viability of building retail complexes in rock caverns. The results of this survey are discussed together with the advantages of this approach.

General underground storage 912465 Swedish know-how aids Japanese oil cavern construction Martin, D Tunn Tunnlg V22, N9, Sept 1990. P!9-22 Underground storage is the cheapest method of increasing Japan's strategic oil reserve. Local seismicity and high incidence of faults and fractures must be considered at the design stages. Two sites have been selected, and construction commenced at one, in Upper Cretaceous granite. Large projects in hard rock are new to Japanese engineers, and different techniques involving NATM must be used. Construction is top down with a heading and five benches. Final lining is shotcrete, which will be able to support design seismic loads. Hydrology is continuously monitored during the construction of the aquifer sealed cavern. 912466 Groundwater behaviour in jointed rock mass during excavation of underground crude oil storage caverns Aoki, K; Shiogama, Y; Kobuchi, T

912469 Rock caverns for Hong Kong: the potential for car parks and cold storage Turner, V D; Buttling, S Proc Seminar Rock Cavern-Hong Kong, Hong Kong, 8-9

December 1989 P69-73. Publ London: IMM, 1989 Uses of underground space for car parking and for cold storage are examined. The potential in terms of enhanced land use by locating car parks underground is discussed with particular reference to the Hong Kong situation. The storage of food underground, a concept that has been exploited successfully in Scandinavia over many decades, is examined. Ways in which precedents in the use of underground space may lead to its more widespread use in Hong Kong are suggested.

Proc International Symposium on Rock Joints, Loen, 4-6 June 1990 P363-368. Publ Rotterdam: A A Balkema. 1990

912470 Stanley underground sewage treatment works - Hong Kong Oswell, M A; Guilfoyle, J J; Hawksley, W; Thomas, R L Proc Seminar Rock Cavern-Hong Kong, Hong Kong, 8-9 December 1989 P75-81. Publ London: IMM, 1989

Large storage caverns are under construction in Japan in a hard, jointed granodiorite rock mass with RQD of about 70%. To allow control of groundwater inflow to the caverns, bulk permeability was evaluated during excavation of exploratory tunnels. Fractures were mapped, water inflow monitored, and borehole injection tests carried out. Highly permeable fracture zones were delineated and grouting specified. The reliability and accuracy of this observational approach is discussed.

The first underground large scale sewage treatment works in Hong Kong is to be constructed at Stanley, an area of great natural beauty and a favourite tourist destination. The treatment works will be formed within equigranular, medium grained, massive, strong granite. The design of the main treatment process area aims to achieve an unlined cavern roof and unlined walls above the level of the tanks. Walls in other areas will be lined with concrete. Details of the design and construction of these works are presented.

1991 Pergamon Press plc. Reproduction not permitted RMMS 28 2 . ~ - L