Abstract: The present disclosure provides a coal bump control method for sectional hydraulic fracturing regions of a near vertical ultra thick coal seam. The method includes: deepening a main shaft from a mining level to a fracturing level; excavating a cross-hole from a roof rock layer of a coal seam at the fracturing level to enter a coal seam being mined, and excavating a roadway along the strike of the coal seam; and drilling hydraulic fracturing boreholes in a dedicated fracturing roadway along an inclination angle of the coal seam to the coal seam above the roadway, wherein the length of the borehole makes the borehole in communication with a goaf, and the spacing of the boreholes along the strike and the sectional spacing of the boreholes in an inclination direction are designed according to the parameters of fracturing equipments and the fracturing length.

Abstract: Systems for forming or extending a tunnel or shaft within geologic material may include a ram accelerator assembly for accelerating one or more projectiles into geologic material to weaken a region of the geologic material. The projectile(s) pre-condition the geologic material, such as by forming one or more holes in a central region of the material or to define a perimeter of the region to be displaced. A cutting tool or subsequent projectile impacts may then be used to remove the weakened material. The voids formed by the first projectile(s) cause compressive forces from subsequent impacts or cutting operations to be converted to tension forces that more efficiently break geologic material, which may fall into the voids created by the first projectile(s). The voids created by the projectile impacts may also control the material that is removed and the shape of a resulting section of the tunnel or shaft.

Abstract: A method for waterproofing a substrate includes steps of: attaching a separation sheet to the surface of the substrate; and attaching a waterproofing membrane sheet to a surface of the separation sheet by a plurality of adhesive elements having a first and second major adhesive surface, wherein the separation sheet is a non-woven fabric sheet, or an embossed polyolefin membrane sheet and each adhesive element includes an adhesive layer composed of a pressure sensitive adhesive.

Abstract: A system for controlling a motion compensated pile guide for a floating vessel comprises a pile guide for guiding a monopile in its longitudinal direction during driving the monopile into a seabed, an actuator for moving the pile guide in horizontal direction with respect to a vessel to which the pile guide is mounted, a control unit for controlling the actuator, which control unit is configured for compensating motion of the vessel to which the pile guide is mounted so as to maintain the horizontal position of the pile guide during driving a monopile into a seabed, a first sensor for determining an inclination angle of a monopile with respect to the vertical during driving the monopile into a seabed, and a second sensor for determining magnitude and direction of an actual force of a monopile onto the pile guide during driving the monopile into a seabed.

Abstract: A method for carrying out grouting between adjacent gateroads in internal-staggered split-level coal mining. A return air gateroad of a stoping face and an inlet air gateroad of a heading face are not on the same level. The return air gateroad of the stoping face is arranged along a roof of a coal seam. The inlet air gateroad of the heading face is arranged along a floor of the coal seam. There is a height difference between the return air gateroad and the inlet air gateroad in a vertical direction. During the construction process, the inlet air gateroad is excavated at a delay distance of 180-200 meters from the return air gateroad. The drilling and grouting are performed while excavating the roadway, where grouting holes are arranged in a single row. A device for implementing the method is also provided.

Abstract: An irrigation system includes at least one water source; at least one water pump-connected to the at least one water source with an irrigation pipe to transport water; at least one air pump connected to the irrigation pipe coming out of the at least one water pump to increase an amount of a water transport; at least one drain cylinder, wherein the irrigation pipe and a ventilation pipe are attached on the at least one drain cylinder; at least one main body; at least one water inlet-outlet hole, wherein the irrigation pipe is attached on the at least one water inlet-outlet hole and located on the at least one main body; at least one drain air hole, wherein the ventilation pipe is attached on the at least one drain air hole and located on the at least one main body.

Abstract: A method for altering a characteristic of the ground. The method comprises the steps of preparing a lignocellulosic material, suspending the lignocellulosic material in a slurry to create a lignocellulosic slurry, The method further includes the step of injecting the lignocellulosic slurry below the surface of the ground into a subterranean aperture. The method also comprises the placement of anchoring devices in the ground to alter at least one force experienced by the ground so that the shape of the subterranean aperture into which the solids are transported is altered.

Abstract: A method for pivoting a travel unit on a machine frame of a road milling machine between an outer end position and an inner end position offset toward a center of the machine relative to the outer end position, the road milling machine having a travel mechanism with multiple travel units, of which at least one travel unit is height-adjustable via a lifting column, comprising the steps of positioning a support foot mounted on the machine frame in a ground contact position to support the machine frame, lifting the travel unit, pivoting the travel unit between the outer end position and the inner end position, lowering the travel unit, and positioning the support foot in a stowed position.

Abstract: A cutting assembly for a rock excavation machine having a frame includes a boom and a cutting device supported on the boom. The boom includes a first portion and a second portion, the first portion supported for pivotable movement relative to the frame. In some embodiments, the first portion includes a first structure extending along a longitudinal base axis and a second structure moveable relative to the first portion in a direction parallel to the longitudinal base axis, and at least one bearing supports the second portion for movement relative to the first portion. In some embodiments, the second portion is pivotably coupled to the first portion by a universal joint, and a suspension system including a plurality of biasing members may be coupled between the first portion and the second portion.

Abstract: Provided is a mineral bit and cutting tip therefor. The mineral bit is configured to penetrate geological materials in a dig face to effectively process the same. The mineral bit includes various geometric constraints to increase structural integrity and penetration capability. The cutting tip may have increased durability and may be self-sharpening.

Abstract: The present invention relates to method for filling deformable karst cave, and the steps are: penetrating a grouting pipe into an elastic silicone tube, penetrating the grouting pipe and the elastic silicone tube into a deformable bracket, and lowering into a karst cave; sealing the elastic silicone tube, injecting silicate resin materials into the grouting pipe, and injecting steel fiber reinforced grout to implement a “block stone-like” structure; sealing the elastic silicone tube, separating the “block stone-like” structure from the elastic silicone tube to complete a “block stone-like” structure; lowering the elastic silicone tube and the deformable bracket, sealing the elastic silicone tube, lowering the elastic silicone tube and the deformable bracket tore construct the “block stone-like” structure, and completing the filling. The present invention may effectively stabilize the karst cave, ensure safe tunnel construction and stable surrounding rocks, and improve engineering construction speed.

Abstract: A cutter drum for profiling a surface includes a cylindrical body extending along an axis from a first end to a second end. The cylindrical body includes a circumferential outer surface encircling the axis. A plurality of cutter mounts are attached to the circumferential outer surface of the cylindrical body. A rotary cutter is rotatably coupled to each cutter mount of the plurality of cutter mounts. A plurality of carbide picks are secured to the circumferential outer surface of the cylindrical body. Each of the carbide picks has a fixed position relative to the circumferential outer surface of the cylindrical body.

Abstract: The present invention belongs to the technical field of ocean traffic engineering, and relates to a fabricated ocean tunnel structure with an escape device and an application method thereof. The present invention includes a fabricated ocean tunnel structure and an escape device. the partition plate separates a middle bin in the tunnel, and the escape device is connected into the middle bin; and the escape device includes a rescue capsule, transverse ladders are evenly arranged in the rescue capsule, and a balancing weight block and a rescue equipment area are arranged at the bottom of the rescue capsule. The ocean tunnel structure can be provided with a rescue device during installation, and the safety of personnel escape can be guaranteed; therefore, the safety of the ocean tunnel structure is improved, cost is relatively low, secondary damage to the ocean tunnel structure is not needed.

Abstract: The present invention relates to an interchangeable unit (28) for material-removing work on a subsoil (U) starting from ground surface (A), the interchangeable unit (28) being designed for operational physical and functional coupling to a machine frame (12) of a road construction machine (10), the interchangeable unit (28) comprising: a housing (30), a removal tool (32), which is mounted on the housing (30) so as to be rotatable about a working axis (R) and of which a circumferential section protrudes from a working opening (30c), a drive belt pulley (62), which is rotatably mounted on the housing (30) and is able to be coupled to a drive belt (58), a transmission gear unit (76), which transmits torque and rotary motion from the drive belt pulley (62) to the removal tool (32) by reversing the direction of rotation, at least the axis of rotation (P62) of the drive belt pulley (62) running at a distance from the working axis (R).

Abstract: A method of operating a cable handling system of a longwall mining machine having a shearer movable along a pan line to mine material along a mine face, the cable handling system including: i) a service line configured to carry one or more supply lines to the shearer for facilitating shearer operation, ii) a plurality of interconnected trays to accommodate the service line, iii) a plurality of sensor nodes distributed along a length of the service line, and iv) a plurality of transceivers distributed along a length of the pan line, the method comprising: a) sensing orientation, acceleration and/or position data of the service line using the plurality of sensor nodes, b) using the plurality of transceivers to receive the orientation, acceleration and/or position data from the plurality of sensor nodes and to transmit the orientation, acceleration and/or position data to a controller, and c) detecting, by the controller, an actual or imminent failure mode of the service line using analysis of the orientatio

Abstract: A scraper for use with a moldboard of a milling machine is manufactured from a rigid material including at least one of the following: a hardened steel having a hardness of at least 50 Rockwell Scale C, a carbide, and PCD diamonds.

Abstract: A method and apparatus for generating a slurry from the surface of the subsea floor, separating that slurry into multiple slurries, and pumping the desired slurry to the surface.

Abstract: A docking guide for a boat includes a platform having front and back sides, a first lateral side for mounting to a dock, and a second lateral side opposite the first lateral side. The platform has an opening, located between the first and second lateral sides, for receiving a front of the boat therein. The docking guide further includes at least one anchoring element secured to the platform on the second lateral side, a first deflector mounted to the platform thereabove to be partially in the opening near an intersection of the front and second lateral sides; and a second deflector mounted to the platform thereabove to be partially in the opening near an intersection of the front and first lateral sides. The second deflector is shifted towards the back side relatively to the first deflector so that, when the boat moves within the opening, it is forced in a parallel relationship with the dock by its contact with the first and second deflectors.

Abstract: The present invention relates to a support method of preset internal cable for in-situ tunnel expansion project, comprising a cable, lockset and an anchoring agent, wherein before the excavation of the newly-built tunnel, a borehole is drilled into the surrounding rock from the in-situ tunnel, and the cable is installed in the borehole and pre-stressed, so as to play a supporting role at the moment of excavation of the newly-built tunnel. The cable is fixed in the depth of the surrounding rock by the anchoring agent, and the lockset of the cable is set at the position of the excavation contour line of the newly-built tunnel inside the surrounding rock. The present invention provides a method that does not interfere with the excavation construction and can effectively support the surrounding rock of the expanded tunnel in advance.

Abstract: A ride-on floor machine, including: a frame including a lower frame portion; a drive system carried by the frame; and a blade control system carried by the lower frame portion, the blade control system including: a blade holder pivotably attached proximate a front end of the lower frame portion; and a linear actuator coupled to the blade holder at a first end and coupled to the lower frame portion at a second end, wherein the actuator extends along a center line parallel to the lower frame portion and is operative to move between an extended position where the blade holder is in an up position and a retracted position where the blade holder is in a down position.