6 results about "Volcanic ash" patented technology

The application provides a volcanic ash soil shearing capacity detection device, and relates to the technical field of soil shearing detection equipment.The device comprises a detection table, an upper shearing box, a lower shearing box, a positioning assembly, a horizontal pressure assembly, a vertical pressure assembly and a shearing detection assembly.The lower shearing box is slidingly connected to the detection table, and the upper shearing box is slidingly connected to the lower shearing box.A positioning assembly for limiting the position of the upper shearing box is installed in the lower shearing box.The horizontal pressure assembly is used to apply a horizontal thrust to one side of the lower shearing box.The vertical pressure assembly is used to apply a vertical pressure to the ash soil sample in the shearing groove.The shearing detection assembly is used to detect the shearing force of the ash soil sample.The positioning assembly can quickly unlock the fixation of the upper shearing box and the lower shearing box, and the unlocking operation is simple and convenient, so that the upper shearing box cannot move along the length direction of the detection table due to misoperation, the integrity of the ash soil sample in the two shearing grooves is maintained, and the accuracy of the detection of the shearing capacity of the ash soil sample is improved.

The application discloses a volcanic ash cloud multi-task monitoring method based on a Transformer and field adaptation, and relates to the technical field of volcanic ash cloud detection and parameter inversion. The application adopts an uncertain-based weighting mode combined with a multi-task loss function, and uses an Adam optimizer to minimize the loss function, so that the model can better capture the relationship between bands from a large amount of simulation data, and is transferred to a real scene, thereby realizing the simultaneous and accurate prediction of information such as the position of a volcanic ash cloud, the cloud top height of the volcanic ash cloud and the volcanic ash concentration.

The application provides a method and system for dynamically evaluating the risk of large-diameter shield tunneling in a volcanic ash stratum. The method includes: processing the identified key risk factors to obtain real-time risk scores, determining the influence of each risk factor on the overall risk through sensitivity analysis, and normalizing the initial weights; dynamically adjusting the initial weights based on the real-time risk scores and the sensitivity analysis index to form a comprehensive risk index; and combining the obtained comprehensive risk index with a dynamic risk heat map for risk assessment. This method dynamically adjusts the sensitivity analysis and risk heat map to quantify the impact of key risk factors, dynamically updates the risk status using real-time monitoring data, and provides scientific decision support for large-diameter shield tunneling in volcanic ash strata.

The utility model discloses a kind of volcanic ash circulating device and circuit board manufacturing equipment, it is related to circuit board manufacturing technical field, wherein, volcanic ash circulating device includes cylinder body, stirring mechanism, reflux device and filter structure, cylinder body is equipped with containing cavity and with containing cavity communication feed inlet, containing cavity is used to store volcanic ash, stirring mechanism is used to stir the volcanic ash in containing cavity, reflux device includes reflux pipe, one end of reflux pipe is located above feed inlet, to flow back used volcanic ash to feed inlet, filter structure is placed at feed inlet, filter structure is used to filter the volcanic ash flowing to feed inlet by reflux pipe, by installing filter structure at feed inlet, filter foreign matter in volcanic ash, to avoid hole break phenomenon caused by foreign matter block hole.

A lost circulation composition is flowed to a lost circulation zone within a wellbore formed in a subterranean formation. The lost circulation composition includes volcanic ash, an epoxy resin, and a curing agent. The curing agent includes nitrogen. The curing agent crosslinks the epoxy resin to form a plug at the lost circulation zone. The plug prevents fluid from flowing from the wellbore into the subterranean formation through the plug at the lost circulation zone.

This disclosure methods of treating unconsolidated sand formations using a sealant composition, including volcanic ash, an epoxy resin, and a crosslinker.