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Cleavage of roof strata. One of the factors affecting outburst hazards of coal seams
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English, French and German. 85F, ST,139Ro PROC.3RD CONGRESS INT.SOC.ROCK MECH.SEPT.1974, D E ~ , USA, NAT. ACAD. SC I .VI,PART B, 1974,P951-1395. In this general report on theme 4 of the Conference (Pock Mechanics of Underground Excavations) the author has considered only those aspects of the subject which he regards as especially i ~ r t a n t to the understanding of the mechsmlcs of underground cavities. He considers in detail a relatively new numerical technique for analysis of underground excavations which expresses the problem wholly in terms of the boundary conditions and some appropriate elementary solutions in elasticity. The discussion of the method is restricted to its application to elastic solids. In the rest of the report a discussion of practical problems involving isolated cavities, tunnels and complex mining excavations is presented. Some less fsmilar aspects of these subjects are dealt with In detail. These include the interaction between the main and the auxiliary mining excavation and design of water barriers.
74. DIADKIN, YD MINING INST. LENINGRAD.SU BORISOV, AA MINING INST .LENINGRAD, SU Pock mechanics problems of underground excavations. Report. In Advances in Rock Mechanics VltPart B. In ~1_ish, French and German. 9F,6T,18R. PROC.3RD CONGRESS INT.SOC.BOCK MECH.SEPT.1974, DENVER, USA, NAT. ACAD. SCI .V1,PART B, 1974, P1399-1439. The results of a series of investigations at the Lenin_ grad Mining Institute are given in this report. Volumetric modelling was used to solve the three-dlmensional problem of deformation and stress distribution in longwall coal mining with roof caving. The theory of ultimate equilibrium was applied to the problem of the rock caving step of fractured rocks In thick deposits with mass breaking. Pock mechanics peculiarities in the permafrost zone are also studied.
Mines See also abstracts: 8,157.
78. NEMIROVSKI I,YV MIREN~DV,VE The state of stress in solid rock with a horizontal working with stowing. 1F,12R. SOVIET MIN.SC I .V9,N3,MAY- JUNE, 1973, P227- 235.
79. EHAPILOVA, NS Hock pressure on a seam near a working face. Brief communication. 2F, IT,BR. SOVIET MIN.SCI .vg,N3,MAY-JUNE, 1974,P329-332. The Barenblatt-Khristlamovich for~mulation of the problem of the mining of sheet deposits by longwalls is used to derive mathematically equations for the stressed state I n the rock mass both before and after working. These ex. pressions are used to construct a graph of the pressure distribution on a seam being worked.
80. EV]~qLING, G B~GBAU- FORSCHUNG, GMBH, ESSEN, D Applications of rock mechanics in deep coal mines of West Germany. Report. In ~dvances in Rock Mechanics, Vl,Part B. In English, French and German. 6F,6R. PROC.3RD.CONGRESS INT.SOC.ROCK MECH.SEPT.1974, D~-qER,USA,NAT .ACAD.SCI .VI,PART B, 1974,P1441-1470. This report gives exa~les of the use made in the West German coal mining industry of the laws of rock mechsnics. The particular aspects covered are: redistribution of stresses in the rock mass, mine layouts; design and support of gateroads; and productive excavations and their support.
75. GEERTSMA, J EDNINKLIJKE- SHELL LAB .RIJSWIJK, NL Survey of rock mechanics problems associated with the extraction of mineral fluids from underground formations. Report. In Advances in Rock Mechanics, V1,Part B. In ~hglish~ French and German. 3F,75R. PROC.BRD CONGRESS INT.SOC.ROCK MECH.SEPT.1974, DENVER, USA, NAT .ACAD. SCI .V1, PART B, 1974, P1471-1506. The role of rock mechanics in the production of mineral fluids, either crude oil, natural gas or both, from underground reservoirs, is discussed. The report is a state-of-the-art review of work published recently or presented at technical meetings before May 1973.
76.
81. DRAVO ODRP. Analysis of large-scale non-coal underground rain_ ing methods. Report. 120F. US BUR.MINES,0P~ FILE REPORT,OFR 36-74,CONTRACT NO. SO122059, JAN.1974, 605P. A comprehensive review of large-scale non.coal mining industry is given. Problem areas requiring research and potential innovations to improve technology are identified. Statistics on underground mining methods and information on the equipment and systems used are included. Current practices for various mining methods, including block caving, room and pillar mining, and in-sltu mining, are described.
ANONY~US Large rock excavation for the Inga scheme .-Techniques and plant used for excavating large quantities of material at a hydroelectric project in Zaire are described. 7F. WATER BOW~, V26, N6,1974, P224- 227.
82. SHAK, ~F Cleavage of roof strata. One of the factors affect. ing outburst hazards of coal seams. In Russian. UGOL UKRAINY, V18, N6, JUNE, 1974, P39- 41.
77. BUDAVARI, S The effects of tlme-dependant rock deformation on the lining pressure in underground excavations. 7F,2T,23E. AUSTRAL. G~0MECH. J .V93, N1,1973, P9-14. Some aspects of the time-dependant behaviour of rocks are presented on the basis of available experimental evidence. Several idealised models, providing acceptable representation of rocks under~Ding creep, are e~loyed in analysIng the effects of creep on the lining pressure in underground excavations. For comparison purposes a description of the interaction between an elastic lining and a rock mass exhibiting linear elastic behav~ur is also included.
3. STOCKS, J I M P ~ .COLL.SCI .TECHNOL .LONDON, GB Underground stone mining. 4F,2T. QUARRY M A N A G ~ T AND PRODS.V1,N4,SEPT.197hjP145-152. The author reviews the possibility of underground stone mining in Britain. The advantages and disadvsmtages of underground extraction and factors favouring underground extraction are discussed. Different mining methods are discussed in detail, these include room-and-pillar mining and sub-level stoping.
84, WILLIAMS,P WRIGHT, DM Roadhead systems-experiences on advsncing faces in the South Midlands area. 9 F.
English, French and German. 85F, ST,139Ro PROC.3RD CONGRESS INT.SOC.ROCK MECH.SEPT.1974, D E ~ , USA, NAT. ACAD. SC I .VI,PART B, 1974,P951-1395. In this general report on theme 4 of the Conference (Pock Mechanics of Underground Excavations) the author has considered only those aspects of the subject which he regards as especially i ~ r t a n t to the understanding of the mechsmlcs of underground cavities. He considers in detail a relatively new numerical technique for analysis of underground excavations which expresses the problem wholly in terms of the boundary conditions and some appropriate elementary solutions in elasticity. The discussion of the method is restricted to its application to elastic solids. In the rest of the report a discussion of practical problems involving isolated cavities, tunnels and complex mining excavations is presented. Some less fsmilar aspects of these subjects are dealt with In detail. These include the interaction between the main and the auxiliary mining excavation and design of water barriers.
74. DIADKIN, YD MINING INST. LENINGRAD.SU BORISOV, AA MINING INST .LENINGRAD, SU Pock mechanics problems of underground excavations. Report. In Advances in Rock Mechanics VltPart B. In ~1_ish, French and German. 9F,6T,18R. PROC.3RD CONGRESS INT.SOC.BOCK MECH.SEPT.1974, DENVER, USA, NAT. ACAD. SCI .V1,PART B, 1974, P1399-1439. The results of a series of investigations at the Lenin_ grad Mining Institute are given in this report. Volumetric modelling was used to solve the three-dlmensional problem of deformation and stress distribution in longwall coal mining with roof caving. The theory of ultimate equilibrium was applied to the problem of the rock caving step of fractured rocks In thick deposits with mass breaking. Pock mechanics peculiarities in the permafrost zone are also studied.
Mines See also abstracts: 8,157.
78. NEMIROVSKI I,YV MIREN~DV,VE The state of stress in solid rock with a horizontal working with stowing. 1F,12R. SOVIET MIN.SC I .V9,N3,MAY- JUNE, 1973, P227- 235.
79. EHAPILOVA, NS Hock pressure on a seam near a working face. Brief communication. 2F, IT,BR. SOVIET MIN.SCI .vg,N3,MAY-JUNE, 1974,P329-332. The Barenblatt-Khristlamovich for~mulation of the problem of the mining of sheet deposits by longwalls is used to derive mathematically equations for the stressed state I n the rock mass both before and after working. These ex. pressions are used to construct a graph of the pressure distribution on a seam being worked.
80. EV]~qLING, G B~GBAU- FORSCHUNG, GMBH, ESSEN, D Applications of rock mechanics in deep coal mines of West Germany. Report. In ~dvances in Rock Mechanics, Vl,Part B. In English, French and German. 6F,6R. PROC.3RD.CONGRESS INT.SOC.ROCK MECH.SEPT.1974, D~-qER,USA,NAT .ACAD.SCI .VI,PART B, 1974,P1441-1470. This report gives exa~les of the use made in the West German coal mining industry of the laws of rock mechsnics. The particular aspects covered are: redistribution of stresses in the rock mass, mine layouts; design and support of gateroads; and productive excavations and their support.
75. GEERTSMA, J EDNINKLIJKE- SHELL LAB .RIJSWIJK, NL Survey of rock mechanics problems associated with the extraction of mineral fluids from underground formations. Report. In Advances in Rock Mechanics, V1,Part B. In ~hglish~ French and German. 3F,75R. PROC.BRD CONGRESS INT.SOC.ROCK MECH.SEPT.1974, DENVER, USA, NAT .ACAD. SCI .V1, PART B, 1974, P1471-1506. The role of rock mechanics in the production of mineral fluids, either crude oil, natural gas or both, from underground reservoirs, is discussed. The report is a state-of-the-art review of work published recently or presented at technical meetings before May 1973.
76.
81. DRAVO ODRP. Analysis of large-scale non-coal underground rain_ ing methods. Report. 120F. US BUR.MINES,0P~ FILE REPORT,OFR 36-74,CONTRACT NO. SO122059, JAN.1974, 605P. A comprehensive review of large-scale non.coal mining industry is given. Problem areas requiring research and potential innovations to improve technology are identified. Statistics on underground mining methods and information on the equipment and systems used are included. Current practices for various mining methods, including block caving, room and pillar mining, and in-sltu mining, are described.
ANONY~US Large rock excavation for the Inga scheme .-Techniques and plant used for excavating large quantities of material at a hydroelectric project in Zaire are described. 7F. WATER BOW~, V26, N6,1974, P224- 227.
82. SHAK, ~F Cleavage of roof strata. One of the factors affect. ing outburst hazards of coal seams. In Russian. UGOL UKRAINY, V18, N6, JUNE, 1974, P39- 41.
77. BUDAVARI, S The effects of tlme-dependant rock deformation on the lining pressure in underground excavations. 7F,2T,23E. AUSTRAL. G~0MECH. J .V93, N1,1973, P9-14. Some aspects of the time-dependant behaviour of rocks are presented on the basis of available experimental evidence. Several idealised models, providing acceptable representation of rocks under~Ding creep, are e~loyed in analysIng the effects of creep on the lining pressure in underground excavations. For comparison purposes a description of the interaction between an elastic lining and a rock mass exhibiting linear elastic behav~ur is also included.
3. STOCKS, J I M P ~ .COLL.SCI .TECHNOL .LONDON, GB Underground stone mining. 4F,2T. QUARRY M A N A G ~ T AND PRODS.V1,N4,SEPT.197hjP145-152. The author reviews the possibility of underground stone mining in Britain. The advantages and disadvsmtages of underground extraction and factors favouring underground extraction are discussed. Different mining methods are discussed in detail, these include room-and-pillar mining and sub-level stoping.
84, WILLIAMS,P WRIGHT, DM Roadhead systems-experiences on advsncing faces in the South Midlands area. 9 F.