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Saturday, May 2, 2020 | History

4 edition of Sealing of Boreholes and Underground Excavations in Rock found in the catalog.

Sealing of Boreholes and Underground Excavations in Rock

by K. Fuenkajorn

  • 312 Want to read
  • 14 Currently reading

Published by Springer .
Written in English


The Physical Object
Number of Pages329
ID Numbers
Open LibraryOL7478889M
ISBN 100412573008
ISBN 109780412573002

Abstract: The mining methods used at South Deep started with conventional mining (pre), which later evolved into mechanized mining with various layouts for drifting and benching, low-profile horizontal destressing with crush pillars and long hole stoping (LHS). The mining method was then changed during to the current high profile destress with : Peter Andrews, Lawrence Rwodzi, Josef Ekkerd, Nkhangweni Ratshitaka. It can be known from Eq. that reducing the air leakage of the in-seam borehole can greatly increase the methane e Fig. 2 shows the principle of air leakage of the in-seam borehole. As can be seen in Fig. 2, the excavations of roadways tend to break the initial stress state of coal seams, resulting in the redistribution of the stress, and forms the annular region of stress change around roadway,.Author: Shengyong Hu, Guocai Hao, Guorui Feng, Huabo Guo, Dengyu Wu.

The manuscript also examines design of support for underground excavations; development of tunnel support philosophy; and an overview of tunnel, underground excavation, and boreholes collapse mechanisms. The selection is a valuable reference for readers and rock engineering practitioners interested in pursuing research on rock engineering. estimates for underground excavations. The first two sections summarize some of the current knowledge on stability and failure modes in underground openings. Based on this, a system using RMi parameters in rock support design has been developed. To clarify, definitions of a few expressions related to the behaviour of rock masses underground areFile Size: KB.

Rockbolts and cables Introduction Rockbolts and dowels have been used for many years for the support of underground excavations and a wide variety of bolt and dowel types have been developed to meet different needs which arise in mining and civil engineering. Rockbolts generally consist of plain steel rods with a mechanical or chemical anchorFile Size: 1MB. Borehole and shaft sealing. Main recent research has focused on the long term stability of underground excavations in rock, notably trying to determine strength of rock under prolonged sustained loading. Main blasting research has included studies of ground vibrations, fragmentation, and rock mass movement induced by tion: Emeritus.


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Sealing of Boreholes and Underground Excavations in Rock by K. Fuenkajorn Download PDF EPUB FB2

Sealing of boreholes and underground excavations has not received much engineering attention until fairly recently. The growing awareness of and sensitivity to environmental concerns of the technical community as well as of the public at large has resulted in an increasing recognition of the fact that these geological penetrations may have an environmental impact.

Presents the experimental research, data analysis and engineering applications of the sealing of boreholes. Generalizing some aspects to address the sealing of underground openings in rock, this book summarizes the mechanical and hydraulic performance of borehole seals.

This reference presents the state-of-the-art in experimental research, data analysis and engineering applications of the sealing of boreholes. Some aspects are generalized to address the sealing of underground openings in rock, and the book summarizes the mechanical and hydraulic performance of borehole seals.

(source: Nielsen Book Data). Effective sealing of penetrations (boreholes) in geological materials is becoming increasingly important as it is recognized that groundwater resources need to be protected from potential Sealing Boreholes in Rock Salt | SpringerLinkCited by: 4.

CRC Press Published J Reference - Pages ISBN - CAT# RU Book Description Table of Contents Author(s) Book Description Underground Excavations in Rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes. out of 5 stars A classical text for underground excavation design.

Reviewed in the United States on Novem Verified Purchase. Prof. Hoek is probably currently the "master" of rock mechanics having not only invented many applied theories (including Hoek-Brown criteria) but also being a well known international consultant. Cited by: 12 TUNNEL INVESTIGATION AND GROUNDWATER CONTROL TECHNOLOGY DEPARTMENT of 70 – mm in diameter.

It provides detailed information about rock type boundaries and orientation and character of structures through a º picture of the borehole wall (Figure 2).

Instruments within the OPTV record the fre-quency, strike and dip and opening of the. Read here ?book=[PDF Download] Underground Excavations in Rock [Download] Full Ebook Read PDF Online. Underground Excavations in Rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes.

What people are saying - Write a review We haven't found any reviews in the usual places.5/5(1). 22 Support of underground excavations in hard rock. Figure Definition of strike, dip and dip direction.

By convention, the dip and dip direction measurements are generally written as 35/, where the two digit number refers to the dip and the three digit number refers to the dip direction. Description: Sealing of boreholes and underground excavations has not received much engineering attention until fairly recently.

The growing awareness of and sensitivity to environmental concerns of the technical community as well as of the public at large has resulted in an increasing recognition of the fact that these geological penetrations may have an environmental impact.

The project had the following goals: sealing of boreholes drilled from underground facilities with a length of up to m, sealing of boreholes with mainly irregular shape (e.g. breakouts of. More information on sealing of boreholes and other underground excavations in rock is given by Fuenkajorn and Daemen ().

2 SEAL OBJECTIVES AND REQUIREMENTS The performance of emplaced seals has been focused on two aspects: hydraulic bond and mechanical by: 1. excavation grouting, or pre-grouting, where the boreholes are drilled from the tunnel excavation face into virgin rock in front of the face. The grout is pumped in and allowed to set before advancing along the tunnel face through the injected and sealed rock volume.

Sometimes, such pre-excavation grouting can be executed from the. Get this from a library. Sealing of Boreholes and Underground Excavations in Rock. [K Fuenkajorn; J J K Daemen] -- This reference presents the state-of-the-art in experimental research, data analysis and engineering applications of the sealing of boreholes.

Some aspects are generalized to address the sealing. Approximate location of underground stone mines for which pillar and roof span dimensions, rock mass characteristics, and excavation stability conditions United States was recorded.

At each mine, the excavation dimensions, rock jointing characteristics, rock mass classification, and excavation stability conditions were recorded.

Underground Excavations in Rock deals with the geotechnical aspects of the design of underground openings for mining and civil engineering processes. Get A Copy Kindle Store $/5. University of rizona Mining and Geological Engineering Rock Excavation MnE – Course Notes – Spring Module Compiled by:File Size: 7MB.

A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Tunnels and underground excavations - Tunnels and underground excavations - Underground excavations and structures: While chambers in were being excavated in rock to fulfill a wide variety of functions, the main stimulus to their development had come from hydroelectric-power-plant requirements.

Though the basic concept originated in the United States, where the world’s first underground.rock, the stress field is locally disrupted and a new set of stresses are induced in the rock surrounding the opening.

Knowledge of the magnitudes and directions of these in situ and induced stresses is an essential component of underground excavation design since, in many cases, the strength of the rock is exceeded and the resulting.Freezing procedure involves drilling boreholes around excavation area, then inserting an outer plastic or steel tube with diameter of cm and an inner tube of cm into the boreholes, the outer tube end is closed whereas the inner tube end is : Madeh Izat Hamakareem.