Abstract: A synchronous single-liquid grouting slurry, its technology and application for large diameter shield engineering under water-rich, high-pressure and weak soil strata conditions, comprising raw materials: 1050-1200 parts of gold tailing, 420-480 parts of silicate cement clinker, 220-240 parts of fly ash, 45-120 parts of waste clay brick, 65-95 parts of slag, 25-45 parts of limestone tailing, 70-80 parts of steel slag, 30-45 parts of silica fume, 15-22 parts of desulfurized gypsum, and 9-15 parts of quick-setting and early-strength composite additive. The invention controls the d50, d85 and d95 of the material particles as 35-40, 42-48 and 50-55 ?m, respectively. Gold tailing with the particle size of 120-600 ?m being used as the fine aggregate, their volume fractions are 40-60%. The slurry production technique, comprising crushing-sieving-superfine ball milling-homogenization-particle size classification-variable speed mixing being developed.

Abstract: A method for slope geological disaster treatment and mineral resource recovery includes the following steps: S1: dividing a mountain top into a plurality of treatment sections and treatment segments; S2, selecting an easy-to-slide area at the upper portion of a first treatment segment and blasting an easy-to-slide body to make the easy-to-slide body roll down to a bottom of the slope; S3, forming a regular initial slope bench; S4, mining coal at the coal seam in a grouped mining adit manner, and laying grouting pipelines in the primary mining adits; S5, forming closed mining adits; S6, excavating secondary mining adits at intervals of the primary mining adits in sequence; S7, continuing mining in an adjacent second treatment segment in the same manner; and S8, continuing mining the first treatment segment of the second treatment section in the same manner.

Abstract: An applicator for a cement-based mixture includes an open container hopper having a first end disposed above a second end along a first direction. The open container hopper elongated along a second direction. The second end of the open container hopper is configured as an outlet for the cement-based mixture. A handle is coupled to one side of the open container hopper. A hose connector is coupled to another side of the open container hopper. The hose connector is configured to allow the cement-based mixture to flow into the open container hopper. A frame having a pair of wheels supports the open container hopper such that the second end is positionable above a trench for backfilling. A height adjustor is coupled between the frame and the open container hopper. The height adjustor is configured to selectively adjust a height of the second end along the first direction.

Abstract: A tunnel excavation device includes a first body portion and an erector device. The first body portion includes a cutter head and a support portion rotatably supporting the cutter head. The erector device is configured to transport a supporting member toward an excavated wall surface. The erector device is provided on the support portion. The erector device includes a ring portion holding the supporting member, and a posture changing device configured to change an angle formed by a center axis of the ring portion and a rotation axis of the cutter head in a plan view.

Abstract: The tunnel excavation device includes a front body section and a rear body section. The front body section includes a cutter head, a cutter head support, and a vertical shoe. The rear body section is disposed to a rear of the front body section and includes a gripper section for obtaining a reaction force when excavating. The cutter head includes a plurality of roller cutters. The cutter head support supports the cutter head. The vertical shoe is disposed below the cutter head support and is provided in a turnable manner to the cutter head support.

Abstract: A mining method is provided without coal pillars with roof-cutting and roadway retaining. This includes, comprising: constructing a gas drainage roadway and eliminating outbursts in a working face transport gate area and track gate area on opposite sides of a first mining working face; constructing various components with an air return roadway. Another end is communicated with the gas drainage roadway by the first process roadway, one end of the working face track gate is communicated with the air return roadway, the other end is communicated with the gas drainage roadway. A ventilation system is formed. This makes full use of the existing gas drainage roadway to meet the roadway layout requirements using the 110 construction method, increasing the use function of the roadway and increasing the reuse rate of the roadway, reducing the roadway engineering quantity before production, shortening the construction period and reduce the cost.

Abstract: The method may comprise receiving historical data (e.g., mineralogy data, irrigation data, raffinate data, heat data, lift height data, geographic data on ore placement and/or blower data); training a predictive model using the historical data to create a trained predictive model; adding future assumption data to the trained predictive model; running the forecast engine for a plurality of parameters to obtain forecast data for a mining production target; comparing the forecast data for the mining production target to the actual data for the mining production target; determining deviations between the forecast data and the actual data, based on the comparing; and changing each of the plurality of parameters from the forecast data to the actual data to determine a contribution to the deviations for each of the plurality of parameters.

Abstract: A method for the regulation of an installation for the geological sequestration of carbon dioxide includes a structure; a CO2 storage compartment, received in said structure; a device for injecting CO2 into a geological reservoir; an energy production device; and an energy storage device. The energy production device supplies a power that varies over time, between low, intermediate, and high states. When the power supplied is in the low state, the injection device is powered by the energy storage device; and when said power supplied is in the high state, the injection device is powered by the power generation device, to ensure a continuous injection of CO2 into the geological reservoir.

Abstract: Environment-friendly reinforced foam for underground hydrogen storage and a preparation method thereof. The reinforced foam includes hydrogen and a liquid phase, where the liquid phase is an aqueous solution of a foaming agent, a foam stabilizer, a pH regulator and a particle cosolvent; and the foam stabilizer is a compounded system composed of 0-dimensional nanomaterial and 1-dimensional nanomaterial at a mass ratio of 2-5:1. In the reinforced foam of the present disclosure, the 0-dimensional and the 1-dimensional nanomaterials are compounded to form a nano-armor layer, which improves the stability of foam and the interfacial viscoelasticity of a liquid film by synergistic reinforcement, and inhibits the viscous fingering, escape and leakage of hydrogen in a reservoir, thereby not only being beneficial to improving the mobility of hydrogen, but also increasing the safety of hydrogen underground storage.

Abstract: A jack-up platform is described having a horizontal working deck that may be jacked up out of the water by moving its legs to a position wherein they take support on an underwater bottom. The jack-up platform further comprises a mooring system for mooring a floating vessel at a mooring side of the jack-up platform. The mooring system comprises an elongated support means for supporting a hull part of the floating vessel, and guiding means connected to the hull of the jack-up platform at the mooring side. The guiding means are able to rigidly hold the elongated support means in a support position, in which the elongated support means is within reach of the hull part of the floating vessel to be supported when the hull is jacked out of the water and the jack-up platform rests on its legs. A method for mooring a floating vessel using the jack-up platform is also described.

Abstract: A load-retention panel having an anchor rod on a load-bearing side thereof forming a horizontal slot therebetween. A securing rod having a diameter greater than or equal to a width of the slot and seated against the load-retention panel and the anchor rod on a first side of the slot. A first section of a flexible sheet extends between the anchor rod and the securing rod and wraps about the anchor rod and the securing rod on opposite sides thereof. The distal end of the flexible sheet extends away from the load-retention panel into and within a landfilling material. The flexible sheet may further wrap about a combination of the anchor rod, the securing rod, and the first section of the flexible sheet with its proximal and distal ends extending through the slot from the first side thereof, and out of the slot from an, opposite second side.

Abstract: A hydropower system includes hydraulic ram system with a pressure vessel having a one-way inlet valve and an outlet valve controlling the release of pressurized water from the pressure vessel for use in a water turbine for providing electricity. A hydropower system may have two or more hydraulic ram systems with a first system feeding a first water turbine and a second and third system feeding a second water turbine. One or more siphons are provided to assist water flow, and an overflow pressure vessel captures and pressurizes waste water from the first hydraulic ram system for use in the third system, which releases pressurized water for the second water turbine. The second hydraulic ram system accepts spent water from the first water turbine and releases pressurized water for the second water turbine.

Abstract: A floor cutting machine having a dust collection cover coupled thereto may comprise a main frame having a first dust collection cover fixing pin configured to attach the dust collection cover to the floor cutting machine; a plurality of front wheels located at a front of the main frame; at least one rear wheel located at a rear of the main frame; a cutting frame having one side fixed to a vicinity of the rear of the main frame and the other side configured to be moved upwards and downwards; a cutting blade fitted on opposite sides of a cutting shaft located in the vicinity of the other side of the cutting frame; and a front frame detachably connected to the front of the main frame, the front frame having a second dust collection cover fixing pin configured to attach the dust collection cover to the floor cutting machine.

Abstract: The disclosure refers to a road construction machine, adapted in particular in the form of a road paver or a feeder vehicle for a road paver. According to the disclosure, the road construction machine comprises a first and/or a second air barrier device adapted to shield a driver and/or an operator of the road construction machine. Furthermore, the disclosure refers to a corresponding method for generating an air flow during operation of a road construction machine in order to shield a driver and/or an operator from vapors and/or aerosols rising during operation of the road construction machine.

Abstract: An underground gasifier pre-control structure includes a flame retardant injection system. The flame retardant injection system includes a flame retardant injection shaft pipe channel drilled from ground to a coal seam and a flame retardant injection channel located in the coal seam. The flame retardant injection channel includes a first flame retardant injection channel and a second flame retardant injection channel at both sides of each gasifier and a third flame retardant injection channel located in a horizontal direction of an adjacent gasifier. The first flame retardant injection channel includes a horizontal section along a strike of the coal seam and a bypass section offset toward the gasifier. The flame retardant injection system forms a wet coal wall in the coal seam to achieve pre-control for the gasifier. The pre-control structure wets the coal masses at both sides of the gasifier and the gasifier does not spread toward both sides.

Abstract: Disclosed is a method for repairing an aquifer in a coal mine area by grouting, including: drilling a survey hole in a ground area corresponding to a water inflow position from ground surface to a caving zone in a goaf; determining a target layer for grouting in the survey hole based on drilling data collected from the survey hole while drilling; changing the survey hole to a grouting hole; measuring a first water level from the grouting hole; grouting through the grouting hole; changing the grouting hole to an observation hole; measuring a second water level from the observation hole; and determining a water retention level based on the first water level and the second water level.

Abstract: A method for setting the lifting position of a machine frame of a ground milling machine, which machine frame is connected via lifting means to movement means, and to a ground milling machine.

Abstract: A ground milling machine comprising a machine frame, a driver's cab, a drive motor, movement means driven by the drive motor and a milling unit for milling up ground material, wherein the driver's cab has a protection roof and a front window device through which an operator located in the driver's cab can look forward in a forward direction of the ground milling machine.

Abstract: A thumb pile provided with a fitting bracket improves work convenience by tensioning a tensile member while inserting a bracket constituted by a plurality of bracket members manufactured using a shearing method into a flange, and at the same time, more efficiently reduce bending stress occurring in a retaining wall through the improved bracket structure.

Abstract: A coastal resilience system for disrupting wave energy and storm surge flux and allowing accumulation of tidal-borne sediment has an interconnected network of biomatter-heavy floating mats positioned in water near a shoreline, and an interconnection subsystem with connection lines flexibly connecting adjacent floatable mats. Lines may be connected, at a plurality of force transfer points or regions within or near the interior of the mat, to other interconnection components positioned within the mat. In some embodiments, mats have yoke sites spaced around their edges and a connection line extends in a straight line from a first yoke site, through the interior of a mat, and to a second yoke site. The connection lines may intersect at an intersection position in the interior of the floatable mat, multiple connection lines may extend across the interior of the mat, but not always through a center of the interior of the mat.