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Stemming material and Inter-row delay timing effect on blast

From the study, it was found that the use of aggregates or screened drill cuttings having a size of 3-7 mm helps in reducing the collar generated boulders as well …

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IOP Conference Series: Earth and Environmental Science …

oil-based drill cuttings (a by-product of drilling operations) has increased significantly. Taking the UKCS (United Kingdom Continental Shelf) as an example, every year, more than 80,000 t of oil- ... Solids-control equipment contains a series of proven products, it mainly includes shakers, hydro cyclones, and centrifuges, as shown in Table 1. ...

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Blasting mechanics: Blasting design standards | #Site Title

2. u0007For hole firing instantaneously along a row, the KS should be equal to 2; 3. u0007For holes firing on a delay, the KS should be between 1.0 and 2.0 – and typically between 1.2 and 1.8. This is because the blasting is four-dimensional, as timing is a crucial part of the design.

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Minimization of Blast-Induced Hazards and Efficient

Stemming is an essential blast design parameter, and inadequate stemming length/materials impact directly, among others, rock fragmentation, backbreak, flyrock, and ground vibration. This study evaluated the impact of various stemming materials such as drill cuttings (fine cuttings), angular aggregates (3–7 mm size) and …

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A new stemming application for blasting: a case study

However, dry drill cuttings eject very easily from blastholes without offering much resistance to blast energy. The plaster stemming method has been found to be better than the drill cuttings stemming method due to increased confinement inside the hole and better utilization of blast explosive energy in the rock.

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Comparison of the efficiency of plaster stemming and drill …

A plaster stemming trial and blast-induced vibrations Cevizci (2012) carried out tests comparing plaster stemming and drill cuttings stemming, each method being used on a single row of seven holes 89 mm in diameter. The stemming length was 1.5 m and 58.7 kg ANFO with 1.25 kg primer was used in the case of the DCSM.

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Cuttings & gas evaluation | Baker Hughes

Our comprehensive Volatiles Analysis Service (VAS) is a lab-based measurement and advisory service that evaluates your formation's fluid, petrophysical, and geomechanical …

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drill cuttings stemming equipment

Drilling rig WikipediaProper Disposal of Drilling Waste National Driller. These rigs use the same technology and equipment as the oil drilling rigs just on a smaller scale The drilling mechanisms outlined below differ mechanically in terms of the machinery used but also in terms of the method by which drill cuttings are removed from the cutting face of the drill …

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drill cuttings stemming equipment

Solids Control Equipment Used in Drilling Operations. Solids control equipment including shakers, hydro-cyclones, and centrifuges are utilized to clean the drill cuttings from the drilling fluid, which then allows it to be reused and recirculated. The circuit includes the mixing of the drilling fluid in the rig tanks.

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Surface Blast Design | PDF | Explosive Material | Coal …

Sized crushed stone or drill cuttings should be used as stemming. Inadequate stemming = possible flyrock. Adequate stemming = well-contained explosive energy. Stemming columns are generally 0.5 to 1.3 …

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"Evaluation of Use of Crushed Aggregate as Stemming

The plaster stemming method has been found to be better than the drill cuttings stemming method due to increased confinement inside the hole and better utilization of blast explosive energy in the ...

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Investigation of Crushed Aggregate as Stemming Material in …

The drill cuttings and crushed aggregates were used as stemming material (as shown in Fig. 1a, b) for conducting the trial blasts. The blast trials have been conducted in a lead–zinc mine, on the top overburden rock formations (Fig. 2a, b). The geology of the mine entailed a stratiform, sediment-hosted lead–zinc deposit that occurred in pre …

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Stemming ejection control in blastholes

A mocap (a hollow plug) is inserted into the hole with a stemming rod to push it to the desired depth. When impulsively compressed at its lower end by the tremendous pressure of the explosion gases, crushed stone arches and wedges into the blasthole walls and provides better interlocking and confinement of the gases than, for …

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A new stemming application for blasting: a case study

For the plaster stemming method, the quantity of ANFO was 46.3 kg per blasthole. The total length of ANFO column in the plaster stemming method was 100 cm greater than for the conventional method of drill cuttings stemming. The blasted area was 338 m 2 for the drill cuttings stemming trial, and blasted volume was 3380 m 3 in situ.

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(PDF) ROLE OF ERGONOMICS IN THE SELECTION …

In spite of plaster stemming application more difficult than drill cuttings stemming, it can provides big profits. With simple machines or equipment, the plaster stemming method could be performed ...

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SUBDRILL THE UNDERUTILISED BLASTING …

• An extra drilling stage is required for the stab holes. • Stab holes need to be manually loaded due to small diameter. • Three times the number of holes and twice the amount of drilling required. • The pattern is very hard to navigate with machinery. • Increased risk of flyrock and larger exclusion zones for equipment.

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A newly developed plaster stemming method for blasting

The length of stemming was 1.5 m. In the case of the drill cuttings stemming method; each blasthole was charged with 58.7 kg ANFO and detonation initiated with two primers 0.625 kg in weight. With the plaster stemming, the spacing of the holes and burdens was increased by 10 per cent, and the quantity of ANFO was 61.3 kg per blasthole.

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Comparison of the efficiency of plaster stemming and drill cuttings

In this study, efficiency of a new method of stemming with plaster was investigated in blast holes and compared with conventional method of stemming with "dry drill cuttings". Drill cuttings is generally used in open pits, quarries and other blast operations as the most common stemming material since it is the most readily available in ...

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Resolving explosives inefficiency | Pit & Quarry

Drill cuttings are generally included in this category because of their similar function. These materials provide a longer general retention time of the explosive gases yet do not form a plug and typically …

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Comparison of the efficiency of plaster stemming and drill cuttings

The plaster stemming method has been found to be better than the drill cuttings stemming method, due to increased confinement inside the hole and better utilization of blast explosive energy in ...

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A newly developed plaster stemming method for blasting

Bastas (drill cuttings stemming) 225/40/225 52 65 3.5 12 2.3 2.5 46.8 9/500 1.0 0.21 Bastas (plaster stemming) 225/40/225 52 65 1.25 12 2.4 2.65 30.6 9/500 1.13 0.20 Figure 1—Application of plaster paste to hole collar Figure 2—Blast hole stemming at Bozanonu limestone quarry (a) Stemming with drill cuttings (b) Stemming with plaster

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Comparison of the efficiency of plaster stemming and drill cuttings

Abstract Numerical simulation of the plaster stemming method (PSM) was performed and compared with the conventional drill cuttings stemming method …

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AEL Surface Blasting Handbook 2013 | PDF | Explosion | Area

1 Clean crushed stone, with a mean size of the stemming material > 1/10th of the hole diameter. e.g. For blast hole diameters in the range 50 to 130 mm, angular crushed rock in the approximate size range of 6 to 13 mm makes a very effective stemming material. 2 Drill cuttings, material usually found on bench surface from drilling equipment

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Minimization of Blast-Induced Hazards and Efficient

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Improving the environmental and economic aspects of …

Drill cuttings are most commonly used as a stemming material due to their availability at the hole collar (Halim Cevizci, and Ozkahraman, 2012). Thus, the stemming material for the blast-hole is mainly comprised of loose soil, dirt, and rock cuttings. An inherent problem with using drill cuttings as

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Improving the environmental and economic aspects of blasting

Drill cuttings are most commonly used as a stemming material due to their availability at the hole collar (Halim Cevizci, and Ozkahraman, 2012). ... can also cause flyrock. Flyrock is a major safety hazard as it can injure personnel, and damage structures and equipment. Another prime blasting consideration, in addition to the type of stemming ...

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Comparison of the efficiency of plaster stemming and drill cuttings

A plaster stemming trial and blast-induced vibrations. Cevizci (2012) carried out tests comparing plaster stemming and drill cuttings stemming, each method being used on a single row of seven holes 89 mm in diameter. The stemming length was 1.5 m and 58.7 kg ANFO with 1.25 kg primer was used in the case of the DCSM.

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Problems in Interpreting Drill Cuttings

First published in 1981, this book was selected to provide the oil industry with a Standard Lithologic Logging System for use in describing cuttings samples from a drilling operation. Roger Swanson developed this manual over years of teaching in …

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drill cuttings stemming equipment

drill cuttings stemming equipment. /time: 15:07. Precision Presplitting – Design Aspects - Rock Products. Precision Presplitting – Design Aspects ... Equipment & Technology ... The stemming material should be drill cuttings, ...

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Problems in Interpreting Drill Cuttings

First published in 1981, this book was selected to provide the oil industry with a Standard Lithologic Logging System for use in describing cuttings samples from a drilling …

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