Abstract: A surge gate for blocking a surge of water includes a sleeve disposed below a waterline of the water, wherein the sleeve has an open upper end and a closed lower end, and a piston slidably disposed in the sleeve, wherein the piston is configured to rise vertically within the sleeve along a vertical axis between a first position with an upper end of the piston positioned below the waterline, and a second position with the upper end of the piston positioned above the waterline.

Abstract: The present invention relates to an earth working method for removing earth material by means of a tool (14) rotating around a working axis (R); the rotating tool (14) being carried by a machine frame (20) of an earth working machine (10); the machine frame (20) standing on a substrate (U) by way of a rollable propelling unit (13) and being driven by a propulsion drive apparatus (25, HM) to perform a propelled motion relative to the substrate (U) in a propulsion direction (VR); the propulsion direction (VR) enclosing with the working axis (R) an angle (?) different from 90°; and the present invention further relates to an earth working machine embodied to execute the earth working method.

Abstract: Systems and methods for extracting desired minerals from a mineral shale zone located below the surface at an existing oil and gas drilling site using a leaching solution. The system and methods include analyzing a mineral shale zone for one or more desired mineral located at a borehole of the oil and gas wellsite, wherein the borehole was produced with horizontal drilling, and wherein the mineral shale zone includes a plurality of fissures caused by fracking. The systems and methods include pumping the leaching solution into the borehole to mobilize one or more desired materials in the mineral shale zone, extracting from the mineral shale zone the one or more desired minerals, pumping the leaching solution and the desired minerals out of the borehole, and separating the one or more desired minerals from the leaching solution.

Abstract: Various aspects include devices, systems, and methods for securing an anchoring element to a seafloor. The methods may use a subsea anchorage installation system that may include a subsea grout supply assembly. The subsea grout supply assembly may include a variable volume grout storage chamber, a paddle, and a subsea grout pump. The variable volume grout storage chamber may be configured to transport dry grout to a seafloor. The variable volume grout storage chamber may include a water injection port configured to receive water for mixing with the dry grout on the seafloor. The variable volume grout storage chamber may also be configured to expand from a collapsed configuration as water is injected.

Abstract: A system for excavating a rock face using microwaves. The system may include a microwave generator, an articulable robotic arm with a plurality of rotatably connected rigid waveguide segments, an applicator attached to a distal end of the robotic arm, and a robotic control system. The system produces microwaves with the microwave generator and moves the robotic arm such that the applicator moves along the rock face as the microwaves exit the applicator to precondition the rock face for excavation. Various patterns of microwave treatment, and controls based on sensor feedback, may be implemented.

Abstract: A construction method for removing mud in a jacket steel pipe pile includes: erecting a piling auxiliary platform, and performing underwater steel pipe pile sinking; measuring an elevation of a mud surface in the underwater steel pipe pile, and calculating a height from the mud surface in the pile to a pile top and a needed mud removing depth according to the measurement result; installing mud removing equipment on the steel pipe pile; starting the mud removing equipment to carry out mud removing operation, and in a case that the mud removing depth is reached, pausing the mud removing equipment, and cleaning an inner wall of the steel pipe pile; and in a case that the mud removing operation is not reach the related elevation, repeating the mud removing operation till the mud removing operation reaches a standard.

Abstract: A fluidized coal mining method utilizing self-energy storage of a coal seam is provided, and includes developing a mine roadway, uncovering coal actively, mining coal in fluidization, and backfilling a goaf. Dynamic phenomenon is induced by uncovering the coal actively, a coal-mining drilling well is established from a ground to the coal seam, and the coal seam is subjected to hydraulic in-situ cutting, and a coal-rock mixture subjected to hydraulic cutting flows into a roadway system along a floor roadway, and then coal, gangue and water in the mixture are separated and recycled in a subsequent circulating coal mining process.

Abstract: A control system for controlling extraction of landfill gas from a landfill via a gas extraction system comprising well piping, the landfill gas having a first temperature when extracted, the control system comprising: a gas composition chamber coupled to the well piping and comprising at least one sensor configured to measure one or more characteristics of a landfill gas sample in the gas composition chamber; a temperature control mechanism configured to heat the landfill gas sample in the gas composition chamber to a second temperature at least a threshold amount greater than the first temperature; and a controller configured to control the at least one sensor to measure the one or more characteristics of the landfill gas sample in the gas composition chamber when a temperature of the landfill gas sample in the gas composition chamber is at least the threshold amount greater than the first temperature.

Abstract: A bolster for a degradation pick includes a transverse cross section that is non-circular. Non-circular cross sections include square, triangular, hexagonal and other shapes. The bolster is made from a wear and/or erosion resistant material. The wear and/or erosion resistant material helps to protect the shank of the degradation pick. The bolster has a matching shape to the shape of the shank of the degradation pick.

Abstract: A coal and coalbed methane mining system based on ground drilling includes: a drilling component, a coal mining drill bit and a ground facility group. The coal mining drill bit is set at a predetermined end of a directional borehole in a coal seam, connected to the drilling component through a connecting pipeline. The ground facility group is connected to the drilling component, to provide coal cutting slurry for the coal mining drill bit, receive reflux slurry carrying coal and coalbed methane, and precipitate and separate the reflux slurry carrying the coal and the coalbed methane. A coal and coalbed methane mining method based on ground drilling and related devices are also disclosed.

Abstract: A grinder truck with a computer controlled profiler in combination with a vehicle automated guidance system for guiding a vehicle and equipment secured to a vehicle for removing of road markings. The computer controlled profiler detects the position of one or more grinding, grooving, rumbling heads in the X, Y and Z position. A controller and one or more actuators are manipulated in response to ground markings visible in a camera field. A remote controller allows an operator to control grinder heads individually, and allows for precise adjustment based upon an operator's visual inspection.

Abstract: An improved sleeve for securing a milling bit to a milling tool base is described. The base may include a lower portion that mates to a surface milling drum and an upper portion with a borehole that accepts the sleeve. The sleeve may include a deflectable rear portion that may include slot tails. When inserting the sleeve into the front of the borehole, the slot tails on the rear of the sleeve may deflect inwardly. The slot tails may then at least partially return to their resting position as they exit the rear of the borehole to lock the sleeve into place. The sleeve may hold a milling bit.

Abstract: The present disclosure relates to a technical field of coal mining, in particular to a surrounding rock stability control method adapted for a coal mining area main roadway. The method comprises the following steps: reinforcing support on a roof and two sides of the mining area main roadway on a basis of an original support form; digging a safety roadway along a stop line of a present working face required by coal mine design, and supporting the safety roadway, wherein a protective coal pillar is formed between the safety roadway and the mining area main roadway; performing slitting blasting on the roof in the safety roadway, wherein blast holes are arranged on a roadway corner line on one side of the present working face to form a pre-splitting slit; and performing stoping at a next working face after completing coal mining at the present working face when stoping at the present working face advances to the safety roadway.

Abstract: A self-acting dredging and drainage structure for a plain river network irrigation area is provided. The structure includes a first tube body, a water inlet end side of the first tube body is provided with a trash rack, a partition body is provided in the first tube body, and a water outlet end side of the first tube body is provided with a contraction and diversion device. The contraction and diversion device divides a water outlet end of the first tube body into an upper water outlet side and a lower water outlet side, and the contraction and diversion device includes no less than one arranged contraction and diversion pipe; and the upper water outlet side has first water outlets and second water outlets.

Abstract: In a rotary mixer having a floating ground guard mounted for vertical movement relative to the frame and relative to the rotor, an actuator configured to provide movement in at least a vertical plane relative to the frame, and a ground guard dislodging tool coupled to the floating ground guard. The ground guard dislodging tool and the actuator are disposed such that the actuator engages and exerts a force on the ground guard dislodging tool to move the floating ground guard in a downward direction relative to the frame.

Abstract: Systems and methods are disclosed for mining lunar and Martian polar permafrost to extract gas propellants. The method can comprise identifying a plurality of near-polar landing sites in craters in which the surface comprises permafrost in perpetual darkness, wherein such landing sites have perpetual sunlight available at altitudes of about 100 to 200 m. A mining outpost can be established in at least one of the sites and a high altitude solar array deployed at the landing site using a lightweight mast tall enough to generate near continuous power for the outpost. Systems and apparatus are disclosed for mining the permafrost at the landing sites using radiant gas dynamic mining procedures. The systems can comprise a rover vehicle with an integrated large area dome for cryotrapping gases released from the surface and multi-wavelength radiant heating systems to provide adjustable heating as a function of depth.

Abstract: Disclosed is a method for carrying out ecological water supplement by using tidal power, including the following steps: constructing a first water supplying river channel at an upper and middle reach of an artery and tributaries of a river channel, storing water at high tide and supplying water to the tributaries at low tide based on the first water supplying river channel; and setting a storage tank at an urban river channel, constructing a second water supplying river channel at an other end of the storage tank connected with the urban river channel, and supplying the water to a city based on the interconnected storage tank, the urban river channel and the second water supplying river channel.

Abstract: Disclosed are systems and methods to bore or tunnel through various geologies in an autonomous or substantially autonomous manner including one or more non-contact boring elements that direct energy at the bore face to remove material from the bore face through the fracture, spallation, and removal of the material. Systems can automatically execute methods to control a set of boring parameters that affect the flux of energy directed at the bore face. Systems can further automatically execute the methods to: monitor, direct, maintain, and/or adjust a set of boring controls, including for example a standoff distance between the system and the bore face, a temperature of exhaust gases directed at the bore face, a removal rate of material from the bore face, and/or a thermal or topological characterization of the bore face during boring operations.

Abstract: The present disclosure provides a greenhouse gas emission reduction method for a heavy metal contaminated soil, falling within the technical field of emission reduction of greenhouse gas nitrous oxide. Specifically, hydroxyapatite (HAP) is added to a soil to effectively reduce the emission of nitrous oxide in the soil, and at the same time, the treatment of heavy metal contamination is realized, which is very suitable for the promotion and use of nitrous oxide emission reduction in the contaminated soil.

Abstract: A plastic leaching chamber is provided and includes a chamber substrate constructed from a PET material and having opposing side base flanges which lie in a horizontal plane and extend lengthwise along the chamber substrate. The chamber substrate includes opposing sidewalls extending upwardly from each of the opposing side base flanges to a top of the chamber substrate and includes a lengthwise center plane which is perpendicular to the horizontal plane. The opposing sidewalls define a plurality of leaching openings having at least one tab slot opening located proximate thereto, and a plurality of louver articles constructed from at least one of a PE and a PP material. Each of the louver articles include a tab which is configured to engage a tab slot opening to securely associate the plurality of louver articles with the chamber substrate to cover the at least one leach opening.