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7578237 |
Method for controlling initiation of a detonator
A method for controlling the initiation of an electronic detonator when located in surrounding ground, the method comprising the steps of: measuring the actual spatial position of the said...
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7406918 |
Method of blasting
A method of blasting in which rock pile profile associated with a blast field is controlled by precise control of the detonation delay times between and/or within individual blastholes in the blast...
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7387071 |
Blasting method and blasting accessory
A drill hole ( 350 ) extends into rock to be blasted. A blasting accessory ( 310 ) includes a container portion ( 312 ) for holding a predetermined volume of stemming material, and a spacer ( 330 )...
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7367631 |
Method of and apparatus for breaking rock
Apparatus for breaking rock includes a cartridge with a base and a wall which extends from the base, the base and the wall forming an enclosure, a propellant inside the enclosure and means for...
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7293615 |
Earth boring system
An earth boring apparatus for sinking shafts and removing shaft material from the shaft, the apparatus having at least two decks; hydraulic means for allowing movement of the decks relative to one...
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7069862 |
Handheld tool for breaking up rock
A tool ( 12 ) has a body ( 14 ) with a barrel ( 18 ) having opposing threaded and fitted openings ( 30 and 28 ). An actuator pin tube ( 26 ), for slidably engaging an actuator pin ( 38 ) having a...
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7052092 |
Drillhole blasting
A blasting arrangement ( 10 ) includes drillholes ( 30 ) in a rock mass ( 20 ). Blind ends ( 32 ) are drilled to a desired level and, if necessary, are adjusted as shown at ( 62 ) to said level....
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6935702 |
Crushing apparatus electrode and crushing apparatus
An electrode for a crusher and a crusher capable of increasing energy utilized for crushing are obtained. The electrode 1 for a crusher comprises a central conductor ( 12, 17 ) extending along a...
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6672674 |
Longwall mining with blasting
The extraction machine for underground ore extraction operations, with extraction of the extraction product by blasting has an advancing support equipment ( 11 ) and a face conveyor ( 18 ) coupled...
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6672673 |
Ore pass inspection system
The present invention discloses an apparatus and method for imaging and clearing an ore pass hang-up. The apparatus includes: a platform that is movable along generally a longitudinal direction of...
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6527345 |
Method for excavating a tunnel rock face by drilling a pattern of lifter and line holes
A method for excavating a tunnel rock face by drilling a pattern of lifter holes and line holes. The line holes ensure the grade or slope of the excavation meets specification while reducing the...
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6454359 |
Method for blasting tunnels using an air bladder
A tunnel blasting method is disclosed. The method including the step of drilling blast holes such as cut holes, cut spreader holes, floor holes and roof holes to predetermined depths and in a...
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6431075 |
Center-cut method for tunnel excavation utilizing large unloaded blast holes and a circular pre-split
Disclosed herein is a center-cut blasting method for tunnel excavation. The center-cut blasting method includes the step of drilling a single central center-cut hole at the center of a center-cut...
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6347837 |
Slide assembly having retractable gas-generator apparatus
The present invention is directed to a boom supporting a slide assembly. The slide assembly includes a guide track, a drill, and a stemming member for use in small charge blasting. The drill is...
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6318272 |
Breaking or blasting or splitting of rock
A method of breaking rock (18), e.g. in underground mining, includes drilling a hole in the rock mass by means of a drilling machine (20) having an articulated boom (22) and a drilling tool (24) at...
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6213212 |
Spherical stemming plug and method of use
A method of stemming a borehole (6) includes the steps of placing a first layer (16) of stemming in the borehole, placing a spherical body (20) in the borehole on top of the layer (16), the body...
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6145933 |
Method for removing hard rock and concrete by the combination use of impact hammers and small charge blasting
The present invention is directed to a method for breaking rock and other hard materials using small-charged blasting techniques followed by a mechanical impact breaker. In small-charge blasting...
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6070511 |
Apparatus and process for loading emulsion explosives
An apparatus and process for the production of any emulsion explosives composition and loading it into a blast hole (7) which utilize a loading conduit (4) having a shear inducing means (5) and a...
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5996709 |
Projectile assisted drill for seismic operations
A portable system for drilling geophysical shot holes in mixed geologic conditions. The system includes a drill for creating a shot hole in unconsolidated soil and for maintaining gauge in mixed...
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5957540 |
Blasting positioning device
A device for unblocking mine raises which has multiple flexible arms attached to a top hollow tube which carries the explosive material. Flexible extension poles are attached to a top hollow tube...
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5907119 |
Method of preventing afterblast sulfide dust explosions
The invention comprises a method of preventing afterblast sulfide dust explosions in blasting operations involving sulfide-containing ores, which method comprises (a) loading a borehole that has...
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5853224 |
Method for completing a well in a coal formation
A method for completing a well penetrating a solid carbonaceous subterranean formation by positioning a perforating gun in an uncased portion of a wellbore penetrating the solid carbonaceous...
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5844800 |
Shot-rock diggability monitor
Method and Apparatus are disclosed for dynamically determining the efficiency of blast design parameters at a mine site from measured machine loader characteristics whereby a microprocessor system...
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5810098 |
Method of breaking slabs and blocks of rock from rock formations and explosive shock transmitting and moderating composition for use therein
Rock slabs or pieces are broken from larger rocks or from rock formations with reduced cracking of the broken rock slabs or pieces by drilling bore holes along the desired break lines, placing...
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5803550 |
Method for controlled fragmentation of hard rock and concrete by the combination use of impact hammers and small charge blasting
The present invention is directed to a method for breaking rock and other hard materials using small-charge blasting techniques followed by a mechanical impact breaker. In small-charge blasting...
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5803551 |
Method apparatus and cartridge for non-explosive rock fragmentation
A non-explosive rock breaking method is disclosed. The method is accomplished by first drilling a hole into a rock. A charging system is then positioned adjacent the hole and a propellant cartridge...
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5765923 |
Cartridge for generating high-pressure gases in a drill hole
The present invention is directed to a cartridge for use in fracturing materials, such as rock. The cartridge includes a base member, a body member, a propellant, and a device for sealing a surface...
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5648635 |
Expendalble charge case holder
This invention is in the field of perforating gun systems used, for example, to gain access to underground oil and gas formations. In particular, this invention relates to an expendable holder...
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5634691 |
Method for excavating a working face by blasting
The present invention relates to a method for forming a parallel bore hole and a slant bore hole (or V-shaped V bore hole) together within the same area of a working face, and then blasting the...
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5542784 |
Method and means for driving pipes into the ground and cartridge used therefor and for subsequent pipe blasting
When driving a tube (24) into the ground, primarily for subsequently loading the tube with an explosive substance and subsequent blasting of the surrounding ground, a driving rod (20) whose rear...
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5531507 |
Method of removing a minable product from an underground seam and bottom hole tool
An improved method and equipment of removing a minable product, such as coal, from an underground seam of minable product, such as a coal seam, includes the steps of drilling a vertical hole from...
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5513570 |
Pressure actuated pipe cutting tool
The present invention is a system for severing pipe. The system includes an explosively actuated pipe cutter, a pressure actuated initiator, and a means for suspending the cutter and the initiator...
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5474364 |
Shotgun cartridge rock breaker
A rock breaker uses shotgun cartridges or other firearm ammunition as the explosive charge at the bottom of a drilled borehole. The breaker includes a heavy steel rod or bar, a gun with a firing...
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5359935 |
Detonator device and method for making same
A device for generating a shockwave for initiating detonation of a main explosive charge and a method for producing same are provided. A device according to the instant invention is capable of...
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5355802 |
Method and apparatus for perforating and fracturing in a borehole
A method and apparatus for perforating a formation surrounding a wellbore and initiating and propagating a fracture in that formation to stimulate hydrocarbon production from the wellbore. The...
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5308149 |
Non-explosive drill hole pressurization method and apparatus for controlled fragmentation of hard compact rock and concrete
Rock and other hard materials, such as concrete, are broken by a controlled-fracturing process referred to as penetrating-cone fracture. The fracturing process is accomplished by pressurizing the...
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5253585 |
Explosive pipe crimping method and devices
A main charge of explosive is positioned symmetrically about a passageway-forming tubular member, such as a well pipe assembly. The charge is outwardly and radially spaced from the member and is...
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5232268 |
Method of breaking a full face of rock for constructing shafts and tunnels
A method for breaking a longer round more efficiently in a full face of rock, to construct shafts or tunnels. In the method a relief hole having at least a 200 mm diameter and at least a 15 to 18...
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5194689 |
Earth excavation using blast casting and excavating apparatus
Coal and other mineral seams are uncovered to a desired width or "cut" by blast casting a portion of the overburden material above the seam into an adjacent pit portion followed by moving a...
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5194174 |
Methods for suppressing fugitive dust emissions
An improved non-viscous aqueous dust control solution which includes a polyvinyl alcohol and boric acid. The improved solution may be spray applied or applied as a foam. The solution may include...
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5192819 |
Bulk explosive charger
There is disclosed, according to the present invention, an apparatus and method for loading explosives exhibiting little water resistance into water filled blast holes without contamination of the...
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5148176 |
Measuring device
The invention relates to a device and process which utilize the Doppler effect for measurement of the performance of blasting operations, in particular to the measurement of face velocity. The...
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5140907 |
Method for surface mining with dragline and blast casting
Coal and other mineral seams are uncovered to a desired width by blast casting a portion of the overburden above the seam into an adjacent spoil pit, followed by excavation of a keycut between...
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5139312 |
Method and apparatus removing a mineable product from an underground seam
A method of removing a mineable product, such as coal, from an underground seam of mineable product, such as a coal seam includes the steps of drilling a vertical hole from the earth's surface...
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5105743 |
Method and device for introduction of explosives into drill holes
In a method and a device for introducing granular or pulverulent explosive into drill holes the introduction is suitably carried out by means of a hose like or tube like conduit (2) introducable...
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5104259 |
Method for excavating rock cavities
The present invention relates to a method for excavating and preparation of rock cavities and then substantially spherical rock cavities or rock cavities having spherically shaped parts, such as...
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5098163 |
Controlled fracture method and apparatus for breaking hard compact rock and concrete materials
Hard compact materials, such as rock, concrete, et cetera, are broken by igniting an appropriately designed explosive or propellant charge placed within the hole or carried in a special...
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5069108 |
Blasting device for unblocking mine raises
A blasting device for unblocking ore passes, backfill raises, mine draw points and any other near vertical raises where rocks or other materials normally fall freely but may get blocked during use,...
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5007345 |
Method and apparatus for charging waterlogged boreholes with explosives
A method of charging waterlogged boreholes with water-resistant particulate explosive material, comprises inserting a pneumatic line with upwardly directed nozzles at the lower end thereof and a...
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4984520 |
Enclosed perforating gun with expendable carrier
In the preferred embodiment of the new and improved perforating apparantus that is described herein, a set of end closure members are cooperatively arranged to be inserted into the open ends of a...
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