摘要:
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.
摘要:
A tool for cutting a material along a path with a liquid jet directed onto the material for hydromechanical or hydraulic mining or for cutting mineral or bituminous material is disclosed. The tool includes a housing having an interior chamber with an opening adjacent the chamber. A nozzle body is mounted to the housing through the opening for swiveling motion about a swivel axis. The nozzle body has a first portion including a cylindrical stem symmetrically disposed about the swivel axis within the chamber and a second portion extending through the opening including a nozzle having a nozzle bore for discharging the liquid jet. A drive, operatively connected to the first portion, is provided for swiveling the nozzle body about the swivel axis.
摘要:
A mineral mining installation has a conveyor and a plough movable along a guide provided at the face side of the conveyor. An auxiliary winning machine constituted by a cutter drum mounted on a carrier by means of a pivotal jib, is provided for winning material in the "stable-hole" region. The carrier is movable along an auxiliary guide which is an extension of the plough guide. The carrier is provided with a drivable pinion which meshes with a rack on the auxiliary guide for driving the auxiliary winning machine along the auxiliary guide.
摘要:
A method and apparatus for treating a cutter ring adapted to be used in tunnel boring operations. An initial cutter member blank is formed and heat treats the cutter ring prior to a cladding process. An alloy is applied to the surface of the cutter blank adjacent to the cutting elements by the cladding process whereby the cutting elements have insufficient heat transfer from the cladding process to reduce their hardness properties, and in one form a fabric material defines the region for the exterior hard surface.
摘要:
A mineral, e.g., coal, mining installation employs a winning machine, such as a plough, equipped with cutting means and which is moved back and forth along a mineral or coal face and along a scraper-chain conveyor as is known per se. Roof support units are arranged along the goaf side of the conveyor and employ roof bars projecting across the roof of the working towards the mineral face. Shifting rams are provided to alternately advance the conveyor and the roof support units as the winning work progresses. The roof bars of the units are pivotably connected to forwardly-projecting components which act as carriers for swinging nozzles emitting high-pressure water jets which impinge on the face to create a channel at the roof zone thereof. The position of the channel can be adjusted by pivoting the carriers with the aid of hydraulic devices. Further swinging nozzles are located at the floor region, conveniently in a frame supporting the conveyor, and these further nozzles emit further water jets which create a channel at the floor zone of the mineral face.
摘要:
The present invention relates to gate road dinting equipment comprising a rapidly advancing coal mining face and a gate road conveyer consolidated in such a manner that a dinting machine of the ranging type is set in place on a skid with a charge conveyer fixed thereon for removing a floor by a cutting drum of the dinting machine and for adjusting the height of the charge conveyer properly, so that a proper excavation height can be maintained for a discharge conveyer and face equipment as well.
摘要:
Slurryable ore where the overburden is unstable and subject to collapse is mined from substantially parallel elongated main trenches connected by a perpendicular trench at the bottom of the mineral seam. A plurality of softwall mining devices supported by face equipment is placed in the perpendicular trench. The devices slurry the mineral material and move into the mineral seam as the overburden sloughs behind the mining devices. The subsided overburden is supplemented as necessary with injected material. Slurried mineral flows to the parallel trenches for removal to the surface. After the softwall devices have advanced the length of the parallel trenches, the devices are withdrawn and placed in additionally developed trenches elsewhere in the ore reserve.