عنوان
پدید آورنده
موضوع
رده
کتابخانه
محل استقرار
شماره کتابشناسی ملی
شماره
TLpq303870731
زبان اثر
زبان متن نوشتاري يا گفتاري و مانند آن
انگلیسی
عنوان و نام پديدآور
عنوان اصلي
Analytical and empirical studies related to geotechnical design of mine shafts
نام عام مواد
[Thesis]
نام نخستين پديدآور
M. H. Sadaghiani
نام ساير پديدآوران
Z. T. Bieniawski
وضعیت نشر و پخش و غیره
نام ناشر، پخش کننده و غيره
The Pennsylvania State University
تاریخ نشرو بخش و غیره
1990
مشخصات ظاهری
نام خاص و کميت اثر
224
یادداشتهای مربوط به پایان نامه ها
جزئيات پايان نامه و نوع درجه آن
Ph.D.
کسي که مدرک را اعطا کرده
The Pennsylvania State University
امتياز متن
1990
یادداشتهای مربوط به خلاصه یا چکیده
متن يادداشت
Geotechnical design of mine shafts has received little attention in the literature, and shafts are still constructed predominantly on the basis of prior experience. Literature review and preliminary investigation led to the definition of the problem in three main aspects: (i) Analytical studies consisting of analyses of stress distribution around shaft openings, a sensitivity analysis of design parameters, and an analysis of failure mechanisms; (ii) Empirical studies; and (iii) Development of design guidelines. Analytical studies helped in the understanding of the stress distribution around mine shafts and in the quantitative estimation of the extent of the disturbed rock zone. The extent of the disturbed rock zone was used in the determination of the bolt length and bolt load, and the support pressure on the lining. The sensitivity analysis determines the effects of the design parameters. The results led to the determination of the most appropriate orientation of rectangular shafts with respect to the direction of field stresses and the degree of the anisotropy of the rock mass. Three primary types of failure mechanisms, using analytical and graphical methods, were recognized: shear failure, compression failure, and buckling of the vertically bedded layers. The results of this study are essential for design of support systems. The adjustments for the favorability of the discontinuity orientations with respect to the direction of the shaft were developed. The adjustments depend on the friction and dip angles of the discontinuities. The range of the adjustments is from 0 to 12 for rectangular shafts and 0 to 10 for circular shafts. Both the primary and the permanent support systems were identified. Guidelines for the design of rock bolts in rectangular and circular shafts were developed. Another major outcome of this research was new guidelines for concrete lining of circular and rectangular shafts with uniform and non-uniform external support pressures based on the design codes of American Concrete Institute. The results of this research will contribute to understanding of the geotechnical behavior of mine shafts and will be useful as guidelines for the design of rock bolts, and plain and reinforced concrete lining in rectangular and circular shafts.
موضوع (اسم عام یاعبارت اسمی عام)
موضوع مستند نشده
Applied sciences
موضوع مستند نشده
Civil engineering
موضوع مستند نشده
Geotechnology
موضوع مستند نشده
Mining
موضوع مستند نشده
rock bolts
موضوع مستند نشده
shaft lining
نام شخص به منزله سر شناسه - (مسئولیت معنوی درجه اول )
مستند نام اشخاص تاييد نشده
M. H. Sadaghiani
مستند نام اشخاص تاييد نشده
Z. T. Bieniawski
دسترسی و محل الکترونیکی
نام الکترونيکي
مطالعه متن کتاب وضعیت انتشار
فرمت انتشار
p
اطلاعات رکورد کتابشناسی
نوع ماده
[Thesis]
کد کاربرگه
276903
اطلاعات دسترسی رکورد
سطح دسترسي
a
تكميل شده
Y
