Geotechnical assessment of potential underground mining impacts for a proposed urban development project in cessnock, NSW

2007 ◽  
Vol 3 (1) ◽  
pp. 51-66
Author(s):  
M Black ◽  
R Kingsland ◽  
D Cliff
Author(s):  
Ahmet SAMSUNLU ◽  
Veysel EROĞLU ◽  
Nihat SAYINALP

2012 ◽  
Vol 204-208 ◽  
pp. 1553-1558
Author(s):  
Li Chun Jiang ◽  
Liu Qing Hu ◽  
Xiao Hui Ren

Disturbance of ground structures by the excavation of underground engineering is a non-linear mechanical behavior process. To find time sequence with the smallest disturbance is important for the safety of mining below railway, river, and building (three-underground mining). A numerical simulation was carried out by 3DEC in mining area. The maximum Lyapunov indices are obtained from the time curves of the maximum unbalanced force. The reasonable time sequence schemes of development project construction under railway in the east ore body of XinQiao Pyrite Mine are compared. The results show that the effect of the data analysis method about the information of unbalanced force-time record based on the chaotic dynamics theory is very positive. It can minimize the risk of scheme with the priority of single mechanical (displacement) index, direct the actual construction effectively and guarantee the safety of ‘three-underground’ complex ore mining by preventive actions in supporting, shortening construction time and other strong measures.


2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Alexander Styhre ◽  
Sara Brorström

PurposeDrawing on the literature on professional ignorance, here defined in affirmative terms as the capacity to act regardless of the incompleteness of available information in organizations and professional communities, the article reports empirical material from an urban development project wherein policy makers' instructions are vague and, in certain domains, inconsistent with market conditions.Design/methodology/approachUrban development projects regularly include uncertainty and risk taking, and policy makers' stated objectives regarding project goals may be incomplete or merely signal a political ambition. In such situations, first-line project participants need to make decisions as if uncertainties regarding policy objectives are manageable and preferably minimal. The purpose of the article is to substantiate the proposition that professional ignorance is a key mechanism in incomplete or imperfect governance systems.FindingsProject participants actively questioned policy but acted on the instructions just the same, which is indicative of how professional ignorance is supportive of governance system that relies on first-line market actors and agencies to implement also incomplete or vaguely stated policy objectives. Incomplete policies derive from challenges in political deliberation and bargaining processes, uncertainty regarding the future and shifting preferences among policy makers and constituencies more widely. In practice, incomplete policies regularly include issues for first-level actors (e.g. on the urban development project level) to handle and to reconcile in their day-to-day work.Originality/valueOn basis of an empirical study of a major urban development project, the study contributes to a growing literature that recognizes the value of professional ignorance in governance systems and in project management practice. The study invites further scholarly research that takes an affirmative of professional ignorance but without overlooking its risks and potential malfunctions.


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