Stresses and displacements around openings in homogeneous rock

Stresses and displacements around openings in homogeneous rock

~A 886 BAWA, KS BUMANIs, A Design considerations fer underground structures in rock. llF,1T, 7R. PROCEEDINGs RETC. AIF24PE,NEW YORK, USA, Vl,1972, P3...

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886 BAWA, KS BUMANIs, A Design considerations fer underground structures in rock. llF,1T, 7R. PROCEEDINGs RETC. AIF24PE,NEW YORK, USA, Vl,1972, P393-4!7. A tall rapid transit system called the Metro system is ourre~hly urger construction in WashiDgton. About one fifth of the system will be designed as traderground structl/res - tunnels and stations - inrock. This paper is a brief discussion of the basic structural concepts developed for the design and construction of the Metro tunnels based on the use of shotcrete and rockbolts for permanent suppc~t.

887 KFJhTING, JM Undmcgrour~l mining. 1974 Annual review. MIN.ENGNG, AIME,V27, 2,FEB. 1975, P52- 53 •

888 REEVEs, JA Undm~ground minlrg. 1974 Annual review. MIN. ENGNG, AIME,V27, 2,FEB. 1975, B64B-64D.

Mines See also abstract:

901.

889 SMART, JD SAGER, JW Instrumentation on recent Corps tunneling projects. 23F,8R. PROCEEDINGS RETC. AIMMPE, NEW YORK, USA, VI,1972,P623-657. The paper is an evaluation of the instrumentation progrems on recent Corps of Engineers tD/ineling projects, particularly for the Norad Cheyenne Mountain Complex Expansion Project, although other projects are also discussed. The paper aims to, l) state the purposes of the instrumentation programs, 2 ) discuss the benefits gained from i n s ~ e n t a t i o n , and 3) present conclusions that will provide guidance for planning instrumentation on future projects.

89o ANONYMOUS Foam grouting stabilizes old mine workings 5F. GROUND E~NG, V8, 2,MAR. 1975, P43-45. To arrest progressive caving of the undergrour~l workings of a disused iron are mine that is now being turned into an oil storage reservoir, special foam injection grouts were developed for filling the large cavities and covering the scree in the workings.

891 LI,~M Envirormental compliance assures future production at JaqUays Asbestos operation. 2F. MIN. ENGNG, AIME, V27, 3,MAR. 1975, I~0-45. The operations axzl geology of the Jaquays Mining Company underground mines in Arizona are described. The drilling, blasting and roof support procedures are discussed briefly.

Power plants

See abstract"

982.

In-situ stresses in ground and stress around underground openings 892 ~WY, FH SYRACUSE UNIV. NEW YORK, USA Stresses and displacements around openings in homogeneous rock,43F, 4R. INT.J.ROCK MECH.MIN. SCI.GEOMECH. ABSTR.VI2, 3,MAR. 1975, P43-57.

893 KULHAWY, FH SYRACUSE UNIV.NEW YORK, USA Stresses and displacements arotund openings, in rock containing an elastic dlscontirg/ity.2R. INY. J. ROCK MECH. MIN. SCI. GEOMECH. ABSTR.VI2, 3,MAR. 1975,P59-72.

89 KIF-2~WY,FH SYRACUSE UNIV. NEW YORK, USA Stresses and displacements arol/rzloperzhlgs in rock containing an inelastic dlscor~IrALity. IIF,SR. INf. J.ROCK MECH. MIN. SCl. GEOMECH. ABSTR. VI2, 3,MAR. 1975, P73-78. 895 CHANG, CY NAIR,K Development arzl applications of theoretical methods for evaluating stability of openings in rock. Report. Figs,tabls,ref s. WOODWARD-LUNDGREN ASSOC. NTIS, 1974,131P. Available information on excavation techniques,constructlon and excavation sequences, the mechanisms of ground support and the current design techniques for support schemes is discussed. Formulation of the computational models, modification of the l~rogram to incorporate the models and anslysis of well-doctm~nted model tests and case histories of underground op~nirgs which include the analysis of model tests on lined and unlined openings in Jointed rock and the analysis of Tumut 1 Underground Power Station and a rock tunnel of the Waahirg~on, D.C. subway are also considered. CROUCH, SL FAIRHURST, C Mechs/lics of coal mine bumps. 12F,15R. TRANS. SOC .MIN.ENGR.AIME, V256, 4, DEC. 1974, P317-323. This paper is concerned with the application of a simplified version of the amalysis presented by Starfield and Crouch to the problem of coal mine bumps. Its purpose is to demonstrate a computer model for predicting the location and severity of coal mine bumps in practical mining situations.

897 CROUCH, SL DIVIV.MINNESOTA, MINNEAPOLIS, USA Analysis of rockburats in cut-ard-fill stopes. llFj 9R. TRANS. SOC.MIN.ENGR AIME, V256, 4, DEC. 1974, P298-303. The application of a slmplej two-dimensional computer technique for evaluatirg rock burst potential in cut-andfill stopes was investigated. The principal purpose of the study was to compare the effectiveness of highmodultts fill and destressi~g as aids in the control of rock bursts. High-modulus fill was found to be ineffective as a means of increasing the mine stiffness a~d acts to control rock bursts only if it supports enongh load to reduce substaxf~ially the stresses on the n~m~ned vein material. Destressing was most effective if it is performed when the vein material is near the point of failure.