Skip to content
  • Home
  • Categories
    • Geology
    • Geography
    • Space and Astronomy
  • About
    • Privacy Policy
  • About
  • Privacy Policy
Our Planet TodayAnswers for geologist, scientists, spacecraft operators
  • Home
  • Categories
    • Geology
    • Geography
    • Space and Astronomy
  • About
    • Privacy Policy
on April 14, 2022

What is long hole stoping?

Geology

Long hole stoping as the name suggests uses holes drilled by a production drill to a predetermined pattern as designed by a mining engineer. Long hole stoping is a highly selective and productive method of mining and can cater for varying ore thicknesses and dips (0 – 90 degree).

Contents:

  • What is long hole open stoping?
  • What is longitudinal stoping?
  • What is long hole mining?
  • What is open stoping?
  • What is purpose of stope surveying?
  • What is the difference between block caving and sublevel caving?
  • What is cave mining?
  • Is block caving safe?
  • What is sublevel caving?
  • What is sublevel stoping?
  • What are 4 types of mining?
  • What is a longwall move?
  • What is Pillaring and retreat mining?
  • What is tailgate mining?
  • What is bord and pillar mining method?
  • What is Panel mining?
  • What is panel system in mining?
  • What is Depillaring operation?
  • How many types of Depillaring are there?
  • What is blasting gallery method?
  • Which type of drilling pattern is followed in BG method?
  • How do you calculate volume of a blast?
  • What is a wedge in mining?

What is long hole open stoping?

Longhole stoping is a very popular method in underground mining for blasting a sequence of stopes in metalliferous mines. The holes are drilled according to a predetermined pattern designed by a mining engineer. This method is one of the most productive ones and covers a variety of ore thicknesses and dips (0 – 90⁰).

What is longitudinal stoping?

Longitudinal longhole retreat is a branch of the generic mining method known as sublevel stoping. For longitudinal retreat the long axis of the stope is along (or parallel) to the strike of the orebody. It may also be referred to as bench stoping or sublevel benching.

What is long hole mining?

Long Hole Drilling means, in its simplicity, drilling deeper holes into the ore in underground mining. This is also known as production drilling, and the typical hole depth varies mostly from 10 meters all the way up to 40 meters in extreme cases.

What is open stoping?

Stoping is practiced in underground mineral mining when the surrounding rock is strong enough to permit the drilling, blasting, and removal of ore without caving. In mines where the rock requires no artificial support, the operation is known as open stoping.

What is purpose of stope surveying?

When mines employ contractors a rapid method of surveying stopes is required so that the pay office can finalise payments at the end of a specific period. Such surveys are also necessary for geological planning purposes and to comply with regulations on keeping mine plans up to date.

What is the difference between block caving and sublevel caving?

Sub-level caving also allows for a slightly more selective extraction of the orebody than is attainable through block or panel caving. Production rates achieved in sub-level caving operations are typically lower than for block caves but higher than for stoping methods.” Caving is a non-selective, bulk mining method.

What is cave mining?

In general, cave mining refers to all underground mining techniques in which the orebody is ‘undercut’ or drilled beneath the surface and is recovered as it falls. The removal of the ore causes a large gap or ‘cave’ where the orebody previously resided.

Is block caving safe?

Hazards and Side Effects

Block caving creates large subsidence features on the surface, such as sinkholes. As a result of removing large continuous masses of rock, the overlying ground surface inevitably collapses to fill the void. Water contamination is a more serious concern.

What is sublevel caving?

Sublevel caving (SLC) is a mass mining method based upon the utilisation of gravity flow of blasted ore and caved waste rock [1]. The method functions on the principle that ore is fragmented by blasting, while the overlying host rock fractures and caves under the action of mine-induced stresses and gravity [2].

What is sublevel stoping?

Sublevel stoping is a mining method in which ore is blasted from different levels of elevation but is removed from one level at the bottom of the mine. Before mining begins, an ore pass is usually drilled from a lower to a higher elevation.



What are 4 types of mining?

There are four main mining methods: underground, open surface (pit), placer, and in-situ mining. Underground mines are more expensive and are often used to reach deeper deposits.

What is a longwall move?

longwall mining Mining. a mining method in which very long rectangular blocks of coal are defined during the development stage of the mine and then extracted in a single continuous operation by an automated cutting head moving parallel to the coal face.

What is Pillaring and retreat mining?

Retreat mining is the removal of pillars in the underground mining technique known as room and pillar mining. In the first phase of room and pillar mining, tunnels are advanced into the coal or ore body in a rectangular pattern resembling city streets.

What is tailgate mining?

Layout. Gate roads are driven to the back of each panel before longwall mining begins. The gate road along one side of the block is called the maingate or headgate; the road on the other side is called the tailgate.

What is bord and pillar mining method?

A system of mining in which the distinguishing feature is the winning of less than 50% coal on the first working. It is more an extension of the development work than mining. The second working is similar in principle to top slicing.



What is Panel mining?

In coal mining: Ground control and roof support. From the submains, panel entries take off to subdivide further a block of coal into panels for orderly coal extraction.

What is panel system in mining?

It is upon this system that all large modern mines in Illinois are projected. The term panel system originally implied the isolation of a group of rooms, called a panel, from other such groups or panels, by a surrounding pillar of coal pierced on one side only by the room en- tries.

What is Depillaring operation?

DEPILLARING It is the process of extraction of coal from pillars . It is also called pillar cutting or broken working.

How many types of Depillaring are there?

Introduction to Depillaring 2. Preparatory Arrangement before Depillaring 3. Depillaring By Caving (Method) 4. Depillaring of Contiguous Seams 5.



What is blasting gallery method?

Blasting Gallery (BG) method is suitable for extraction of virgin thick seams as well as developed pillars in thick seams in single lift. The method was very successful resulting in 85% of extraction with high productivity. But, this method experienced strata control problems during final extraction.

Which type of drilling pattern is followed in BG method?

In BG Method, drilling is done by crawler mounted electro-hydraulic jumbo drill which can drill at any angle in the vertical plane, as the method envisages drilling of holes in Fan Pattern. The length of hole depends on its position and seam thickness. The jumbo drill can drill upto 30 m.

How do you calculate volume of a blast?

Page 3

  1. BH + SD. Charge length (C) =
  2. L – SL. Blast volume (V) =
  3. B x S x BH x N. Blasted tonnes (T) =
  4. V x Density of rock in t/m3. Volume of blasthole (Vb) =
  5. π x D2/4000 x L. …
  6. PF (kg/m3) = …
  7. blasted (for kg/Tonne, divided by blasted tonnes T) …
  8. AWS of explosive/AWS of ANFO x 100.

What is a wedge in mining?

i. A cut in which the central holes are positioned to cause the breakout of a wedge-shaped section of strata when fired.

Recent

  • Exploring the Geological Features of Caves: A Comprehensive Guide
  • What Factors Contribute to Stronger Winds?
  • The Scarcity of Minerals: Unraveling the Mysteries of the Earth’s Crust
  • How Faster-Moving Hurricanes May Intensify More Rapidly
  • Exploring the Feasibility of Controlled Fractional Crystallization on the Lunar Surface
  • Adiabatic lapse rate
  • Examining the Feasibility of a Water-Covered Terrestrial Surface
  • The Greenhouse Effect: How Rising Atmospheric CO2 Drives Global Warming
  • What is an aurora called when viewed from space?
  • Measuring the Greenhouse Effect: A Systematic Approach to Quantifying Back Radiation from Atmospheric Carbon Dioxide
  • Asymmetric Solar Activity Patterns Across Hemispheres
  • Unraveling the Distinction: GFS Analysis vs. GFS Forecast Data
  • The Role of Longwave Radiation in Ocean Warming under Climate Change
  • Esker vs. Kame vs. Drumlin – what’s the difference?

Categories

  • English
  • Deutsch
  • Français
  • Home
  • About
  • Privacy Policy

Copyright Our Planet Today 2025

We use cookies on our website to give you the most relevant experience by remembering your preferences and repeat visits. By clicking “Accept”, you consent to the use of ALL the cookies.
Do not sell my personal information.
Cookie SettingsAccept
Manage consent

Privacy Overview

This website uses cookies to improve your experience while you navigate through the website. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. We also use third-party cookies that help us analyze and understand how you use this website. These cookies will be stored in your browser only with your consent. You also have the option to opt-out of these cookies. But opting out of some of these cookies may affect your browsing experience.
Necessary
Always Enabled
Necessary cookies are absolutely essential for the website to function properly. These cookies ensure basic functionalities and security features of the website, anonymously.
CookieDurationDescription
cookielawinfo-checkbox-analytics11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Analytics".
cookielawinfo-checkbox-functional11 monthsThe cookie is set by GDPR cookie consent to record the user consent for the cookies in the category "Functional".
cookielawinfo-checkbox-necessary11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookies is used to store the user consent for the cookies in the category "Necessary".
cookielawinfo-checkbox-others11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Other.
cookielawinfo-checkbox-performance11 monthsThis cookie is set by GDPR Cookie Consent plugin. The cookie is used to store the user consent for the cookies in the category "Performance".
viewed_cookie_policy11 monthsThe cookie is set by the GDPR Cookie Consent plugin and is used to store whether or not user has consented to the use of cookies. It does not store any personal data.
Functional
Functional cookies help to perform certain functionalities like sharing the content of the website on social media platforms, collect feedbacks, and other third-party features.
Performance
Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors.
Analytics
Analytical cookies are used to understand how visitors interact with the website. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc.
Advertisement
Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. These cookies track visitors across websites and collect information to provide customized ads.
Others
Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet.
SAVE & ACCEPT