A cutting device for cutting rock includes a disc and a plurality of cutting elements secured to the disc. The disc is supported for rotation about an axis of rotation, and the disc includes a peripheral edge extending around the axis of rotation. The plurality of cutting elements are spaced apart along the peripheral edge of the disc and positioned in a cutting plane. Each of the cutting elements includes a base portion and a cutting portion including a cutting edge, and the cutting portion has a width that is larger than a width of the base portion.

Various embodiments include methods and apparatus structured to increase efficiencies of a drilling operation. A drilling apparatus can be structured to include a hammer drill to move a hammer to impart impact force to a bit box in conjunction with a rotary drive shaft. The hammer drill can be arranged as a mechanical drive hammer capable of being applied to both fluid drilling and air drilling. Additional apparatus, systems, and methods are disclosed.

Described herein is an earth auger and pole machine for automated installation of poles in earth banks of access roads to open-pit mines. The earth auger and pole machine is fitted with a mechanic boom comprised of a first link and a second link. The first link has an end attached to a base fixed to a conveyor vehicle, and the other end coupled to the second link. The second link comprises a magazine for loading the poles, an auger system to drill the ground, and an installer to place the poles into the hole. This document also describes a method for installing poles in sequence by using the earth auger and pole machine.

A cutting device for cutting rock includes a disc and a plurality of cutting elements secured to the disc. The disc is supported for rotation about an axis of rotation, and the disc includes a peripheral edge extending around the axis of rotation. The plurality of cutting elements are spaced apart along the peripheral edge of the disc and positioned in a cutting plane. Each of the cutting elements includes a base portion and a cutting portion including a cutting edge, and the cutting portion has a width that is larger than a width of the base portion.

A cutting device for cutting rock includes a disc and a plurality of cutting elements secured to the disc. The disc is supported for rotation about an axis of rotation, and the disc includes a peripheral edge extending around the axis of rotation. The plurality of cutting elements are spaced apart along the peripheral edge of the disc and positioned in a cutting plane. Each of the cutting elements includes a base portion and a cutting portion including a cutting edge, and the cutting portion has a width that is larger than a width of the base portion.

A device for coupling to a working end of a hydrovac boom hose is disclosed. The device includes a tubular suction tube configured for removably coupling to the working end of the hydrovac boom hose such that an opening of the working end remains unobstructed. A plurality of high pressure water jet nozzles is located around a circumference of the tubular suction tube such that the water jet nozzles surround the working end of the hydrovac boom hose to dislodge earthly materials under the device. The high pressure water jet nozzles are configured for emitting high pressure that dislodge earthly material. A cylindrical housing to enclose and protect the tubular suction tube, water jet nozzles, locating device and provide an air duct for the ambient air to pass down threw. A plurality of air vents in the cylindrical housing that provide flow of ambient air to an area being excavated. The conduit coupled with the cylindrical housing, the conduit for allowing ingress of water to the plurality of high pressure water jet nozzles.

A device for coupling to a working end of a hydrovac boom hose is disclosed. The device includes a tubular suction tube configured for removably coupling to the working end of the hydrovac boom hose such that an opening of the working end remains unobstructed. A plurality of high pressure water jet nozzles is located around a circumference of the tubular suction tube such that the water jet nozzles surround the working end of the hydrovac boom hose to dislodge earthly materials under the device. The high pressure water jet nozzles are configured for emitting high pressure that dislodge earthly material. A cylindrical housing to enclose and protect the tubular suction tube, water jet nozzles, locating device and provide an air duct for the ambient air to pass down threw. A plurality of air vents in the cylindrical housing that provide flow of ambient air to an area being excavated. The conduit coupled with the cylindrical housing, the conduit for allowing ingress of water to the plurality of high pressure water jet nozzles.

An excavating pump apparatus and a pile installation apparatus having the same are disclosed. An excavating pump apparatus in accordance with an embodiment of the present invention may include: an excavation head being inserted into an inner space of a pile through an open hole opening the inner space of the pile and being configured to crush seafloor sediments and allow the crushed seafloor sediments to be flowed therein; an outlet conduit connected to the excavation head and being a channel for discharging the seafloor sediments flowed into the excavation head to an outside of the pile; and a pump configured to move the seafloor sediments through the outlet conduit by providing a pump pressure to the outlet conduit

An excavating pump apparatus and a pile installation apparatus having the same are disclosed. An excavating pump apparatus in accordance with an embodiment of the present invention may include: an excavation head being inserted into an inner space of a pile through an open hole opening the inner space of the pile and being configured to crush seafloor sediments and allow the crushed seafloor sediments to be flowed therein; an outlet conduit connected to the excavation head and being a channel for discharging the seafloor sediments flowed into the excavation head to an outside of the pile; and a pump configured to move the seafloor sediments through the outlet conduit by providing a pump pressure to the outlet conduit

Systems and methods to provide pressed aggregate-filled cavities for improving ground stiffness and uniformity are disclosed. According to an aspect, a method includes using a mechanism to press into a ground surface in a substantially downward direction to create a concavity. The method also includes substantially or completely filling the concavity with unstabilized or chemically stabilized aggregate, soil, or sand. Further, the method includes using the mechanism to press the aggregate within the concavity to achieve a desired ground stiffness.