Online English Summarizer tool, free and accurate!
Surface Mining to
Underground Mining
Mineral deposits can be so close to the surface
that their extraction by surface methods can eas-
ily be carried out. In contrast, some mineral
deposits occur so far from surface that only
underground mining is allowed. Besides these
contrasted situations, there are some deposits that
start at surface or near surface and continue to
great depth. In such vertically extensive ore bod-
ies, a combination of both surface and under-
ground methods could result in a higher net
profit than only one (Bakhtavar 2013). Within
this transition zone, it is necessary to consider
issues such as the production rate or the eco-
nomic and risk features because these factors can
decide the open-pit to underground mining point
that is the best for the project. However, as the
costs of underground mining can be many times
that of surface mining, only moderate- to high-
grade deposits can be mined by underground
methods below an open-pit. Accurate estimation
of the depth in mines where both methods are
utilized is of significant interest (Bakhtavar et al.
2009). The point at which economic consider-
ations define the change from open-pit to under-
ground method is referred to as «transition
depth.» To take the decision of where to end the
open-pit method and begin the underground
method is referred to as the «transition problem,»
and it has originated some attention in the litera-
ture since the 1980s (. Box 5.7: Venetia Transition
Surface to Underground Mining)
Surface Mining to
Underground Mining
Mineral deposits can be so close to the surface
that their extraction by surface methods can eas-
ily be carried out. In contrast, some mineral
deposits occur so far from surface that only
underground mining is allowed. Besides these
contrasted situations, there are some deposits that
start at surface or near surface and continue to
great depth. In such vertically extensive ore bod-
ies, a combination of both surface and under-
ground methods could result in a higher net
profit than only one (Bakhtavar 2013). Within
this transition zone, it is necessary to consider
issues such as the production rate or the eco-
nomic and risk features because these factors can
decide the open-pit to underground mining point
that is the best for the project. However, as the
costs of underground mining can be many times
that of surface mining, only moderate- to high-
grade deposits can be mined by underground
methods below an open-pit. Accurate estimation
of the depth in mines where both methods are
utilized is of significant interest (Bakhtavar et al.
2009). The point at which economic consider-
ations define the change from open-pit to under-
ground method is referred to as «transition
depth.» To take the decision of where to end the
open-pit method and begin the underground
method is referred to as the «transition problem,»
and it has originated some attention in the litera-
ture since the 1980s (. Box 5.7: Venetia Transition
Surface to Underground Mining)
Summarize English and Arabic text using the statistical algorithm and sorting sentences based on its importance
You can download the summary result with one of any available formats such as PDF,DOCX and TXT
ٌYou can share the summary link easily, we keep the summary on the website for future reference,except for private summaries.
We are working on adding new features to make summarization more easy and accurate
فهؤلاء يعني انتم بعيدون عن المدينة فخليكم في اماكنكم انتم بخير وعلى خير ايضا فخليكم في اماكنكم تعبدو...
منذ الاحتلال الفرنسي إلى غاية الحرب العالمية الأولى لم يكن هناك تنظيم نقابي جزا ئري ، لأن فرنسا لم ت...
وتكتب أيضاً عَلَمْتُ أَنْ لَا خَيْرَ عِنْدَهُ» و «ظننت أن لا بأس عليه، فتظهر أن» لأنه بمعنى علمت أنه...
انعدام الوزن تستخدم لعلك شاهدت صورًا لحركة رواد فضاء يسبحون داخل المكوك الفضائي وهو يتم تحرك الـ حول...
In the world of roses, a person forgets that the system of the shop in the work is a little complica...
يمكن أن يمتد الشعور بالألم في جميع منطقة الفرج، خصوصاً إن كان ناجما عن التهاب حاد ويكون السبب النمطي...
محاضرة التاجر (الملخص): 1-تعريف التاجر: تعرف المادة الاولى من ق ت ج (الوثيقة 1) التاجر كما يلي...
Periodically updating the list of medicines, following up on item prices, and determining the quanti...
Influence of Artificial intelligence for the labor market There are less optimistic forecasts and a ...
لم يعد استخدام التكنولوجيا في التعليم مجرد نوع من الرفاهية أو تكملة لعناصر الدرس داخل القاعات الدراس...
قرر رئيس الوزراء الكندي زيارة مدينة تشارلوت تاون ليجتمع بأتباعه المخلصين وكان معظم أهالي بلدة أفونلي...
يعتبر النمو الإقتصادي من المفاهيم التي جذبت إهتمام الباحثين لما له من أهمية في الحياة الإقتصادية، فق...