Dm Technologies Ltd.

Dm Enterprises Inc.

Other

Engineered Instruments, Inc.

Deep Shaft Technology, Inc.

Mraz Project Consulting Services, Inc.

Westfalia Dme, Inc.

P.m. Investments Inc.

Dennis Z Mraz

Anil Mahyera

Donald R Skuce

A method and apparatus for the mining of material from a seam includes a mining apparatus and a self-propelled conveyor capable of advancing or retreating in the seam on its own power and an advancing and steering arrangement for the mining apparatus. The self-propelled conveyor, electric cables and other services for the mining apparatus are protected against roof falls. The power input for the self-propelled conveyor is provided by continuous drive shafts powered at either one or both ends of the conveyor. Alternately, a unique reciprocating conveyor mechanically powered at either one or both ends of the conveyor is provided for conveying of aggregate material. An apparatus for assembling the conveyor and receiving aggregate material is provided at the rear end of the conveyor. A method and apparatus for accurately and precisely navigating the mining machine is disclosed.

Method and apparatus for remote self-propelled conveying in mineral deposits

A method and apparatus for mining of aggregate material from a seam includes a mining apparatus and a self-propelled conveyor capable of advancing or retreating in the seam on its own power and advancing and steering arrangement for the mining apparatus. The self-propelled conveyor, the electric cables and other services for the mining apparatus are protected against the roof falls. The power input for the self-propelled conveyor is provided by continuous drive shafts powered at either one or both ends of the conveyor. Alternately, a unique reciprocating conveyor mechanically powered at either one or both ends of is provided for conveying of aggregate material. An apparatus for assembling the conveyor and receiving of aggregate material is provided at the rear end of the conveyor.

A method and apparatus for advancing cables and hoses to a remotely operated mining machine and retrieval of the machine in case of accident, and for remote haulage of material in a self-propelled vehicle guided within a mine opening, so as to avoid interference with cables and hoses and the walls of mine opening.

Tow line equipped remote mining machine and method

A flexible mobile conveyor includes a plurality of modular conveyors or conveyor carriages interconnected end-to-end by pivotal joint means to form a train, at least one end of each modular conveyor or carriage telescopically mounted with respect to the pivotal joint means, each pivotal joint means pivotally supported by an intermediate axle with wheels, and a mechanical linkage disposed between the axles in order to maintain a, predetermined position of each intermediate axle with respect to modular conveyors at each horizontal pivot means, in order to maintain relatively accurate tracking.

Flexible mobile conveyor with multipivotal linkage

An apparatus for yielding rock support in a rock bolt where yielding is achieved by one or more yielding elements at one or more levels of loading.

Apparatus for yielding support of rock

A method of rock cutting where, as a first step of each excavation cycle, a second open surface is created utilizing boring method and, as a second step, the excavation cycle is completed utilizing a shearing method; and a cutting element for excavation of rocks comprising both a boring tool and a shearing tool, wherein the cutting element can be remotely adapted either for boring or for shearing.

Method and apparatus for boring and shearing of rocks

A method and apparatus for haulage of material in a self-propelled vehicle on a sloped surface by supplementing traction force of the self-propelled vehicle by rope under variable tension in order to achieve the desired velocity of haulage.

Method and apparatus for mining inclined mineral deposits

A method and apparatus for recording and playing back of a permanent digital information on a recording medium consisting of an insulating and a conductive layers of material, by creating spots of increased conductivity in the insulating layer.

Digital information recording by burning conductive spots with

A mining method and apparatus includes drilling two relatively small diameter shafts in proximity to each other, and operating a single hoisting system between the two shafts. The hoisting system includes a hoist that simultaneously moves first and second conveyances in opposite directions respectively in the first and second shafts.

Method and apparatus for developing shafts using small diameter shafts

A mining machine having a frame undercarriage having forward and rearward ends provided with a traction assembly for driving the frame undercarriage towards a seam face to be mined. A cutting assembly is provided which includes a plurality of rotatable outer elements each having a substantially horizontal rotation axis disposed perpendicularly to the seam face and an assembly for swinging the cutting assembly up and down with respect to the seam face about a horizontal swing axis parallel to the seam face. The swinging assembly is pivotally mounted on the forward end of the carriage to input pivotal movement of the cutting assembly about a vertical pivot axis.

Multipurpose mining machine

A flexible mobile bridge conveyor has a plurality of carriages connected to each other to form a train. Each carriage has an axle with wheels mounted on opposite ends thereof and encased in a housing. A first frame section is fixedly connected to the axle housing, and a second frame section has a proximal end pivotally connected to the first frame section so as to be pivotal about both a horizontal, longitudinal pivot axis and a horizontal, transverse axis. Linkage mechanisms are coupled to the first and second frame sections, for coupling adjacent carriages, so as to provide pivot movement about a vertical axis. This combination of linkages provides three degrees of freedom in order to enable the flexible mobile bridge conveyor to negotiate uneven roadway surfaces while following curved trajectory in the direction of movement.

Flexible mobile bridge conveyor

A method and apparatus of measuring rock-stress uses a tapered sensing plug which is wedged into a conically shaped end portion of a borehole. A rod is used to place the sensing plug in position, to orient the plug relative to its longitudinal axis for sensing stress in a particular direction, and to prestress the sensing plug by causing same to be wedged in the tapered portion of the bore.

Growing community of inventors

Saskatoon, Canada

Dennis Z Mraz