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Related to blasting: Explosives, Sand blasting, Grit blasting


blasting, shattering, breaking, or splitting of rock or other material by the discharge of an explosive placed within or in contact with it. It is a necessary part of many engineering operations. An ancient method of breaking rock consisted of heating the rock by fire and then pouring water on it, the sudden contraction resulting in shattering or cleavage. Modern methods of blasting involve four operations: drilling the holes to receive the charge, placing it, stemming the hole (i.e., filling the hole above the charge with earth or clay), and igniting or detonating the charge. The location, size, and number of holes drilled depend upon local conditions and the nature of the work. The holes vary from 1 to 3 in. (3–8 cm) in diameter and from a few inches up to 20 ft (6 m) or more in depth. The charge is made up of some explosive, such as dynamite or ammonium nitrate; black powder, the oldest known explosive, is rarely used today. Multiple charges are sometimes set off, either simultaneously or in sequence.
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(religion, spiritualism, and occult)

A medieval term for the interference with the fertility of crops, humans, and animals, by witches. If a farmer suffered a poor harvest, he might well blame it on a witch for "blasting" his crops. If a woman miscarried, she might claim she had been blasted. It was said that the spell for blasting included the flaying of a cat, lizard, snake, or toad, then reducing the skin to ashes over a fire made of yew, hawthorn, and elder. The ashes were scattered over the farmer's fields or sprinkled on the threshold of his house.

In fact, true Witches are very pro-life and work for fertility, not against it. But this was part of the propaganda of the early Church, a reversal of true pagan ways to make them appear negative. In the Malleus Malleficarum (1486), the second of its three parts deals with a number of sexual matters (with which the inquisitors seemed especially fascinated), including the methods used by witches to dull the powers of generation and obstruct the sex act. It also deals with how they cause the male organ to disappear, how they kill a child in the womb, and how they injure cattle and raise storms.

The two monks who wrote the Malleus Malleficarum were quite specific when it came to descriptions of these acts: "Intrinsically they cause (obstruction of the procreant function) in two ways. First, when they directly prevent the erection of the member which is accommodated to fructification. And this need not seem impossible, when it is considered that they are able to vitiate the natural use of any member. Secondly, when they prevent the flow of the vital essences to the members in which resides the motive force, closing up the seminal ducts so that it does not reach the generative vessels, or so that it cannot be ejaculated, or is fruitlessly spilled."

But blasting could also be done with the evil eye, by the witch just looking at the person or thing and muttering a curse. Charges of blasting were frequently made against witches and, as with so many false charges, were almost impossible to disprove.

The Witch Book: The Encyclopedia of Witchcraft, Wicca, and Neo-paganism © 2002 Visible Ink Press®. All rights reserved.


Cleaning materials by a blast of air that blows small abrasive particles against the surface.
The act of detonating an explosive.
Abrasion caused by movement of fine particles against a stationary fragment.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.


Using explosives to loosen rock or other closely packed materials.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Blasting operations, carried out anywhere, have an impact on many different objects such as underground and overhead distribution, fauna, flora which have to be thoroughly protected in order not to cause more damage than benefit by utilizing the blasting energy.
SteamMaster began utilizing dry-ice blasting over three years ago.
The erosion wear index, [epsilon], which is defined as the weight of material removed divided by the weight of media blasted, has widely been used to characterize the material removal rate in blasting. In the past, as shown in Figure 2, researchers have observed that the erosion wear index peaks at different impact angles for ductile metals and brittle solids (Williams 1994).
Surface blasting of the HSS drill components is achieved with three powerful Guyson model 900 blast guns mounted on a vertically traversing arm, stroking up and down the various drill lengths, and then a post blast compressed air wash is directed at the drills to remove residual dust and blast media.
[18] proposed a water-silt composite-stemmed blasting method in tunnels, which could improve the breakage of rock, lower dust, and save explosive.
In 1950s, the smooth blasting method has been put forward in Sweden.
RAM's Surface Blasting course explores all aspects of the latest, state-of-the-art blasting methods and technologies, along with rock face profiling.
There are many factors that affect the reaction of people to blasting vibration.