3 results about "Coal petrography" patented technology

This invention relates to a method for refining and classifying coking coal based on petrographic and matrix strength, comprising: determining the petrographic composition of the coking coal; placing the prepared sample in a dry distillation reactor for dry distillation reaction; pulverizing; taking a sample with a weight of M0 and placing it in a type I rotary drum for a rotational experiment, then sieving and recording the weight of coke particles larger than 0.2 mm as M1; calculating the matrix strength I. cb = (M1 / M0)*100%; based on the vitrinite content V and matrix strength I in the coal and petrographic composition. cb This invention enables the detailed classification of coking coal. It can quickly distinguish between coking coal types with similar conventional coal quality indicators and further classify them, providing a reliable basis for coking coal quality evaluation and blending guidance. The method is simple, reliable, low-cost, and timely, making it suitable for coal and coking enterprises and possessing broad application value.

The present application provides a coal rock image preparation method based on wire cutting and image repair, belonging to the technical field of coal rock analysis and image processing, comprising: wire cutting of a coal rock sample to obtain an original microscopic image of the coal rock sample cutting surface; according to the original microscopic image, identifying and processing the scratch area of the original microscopic image through a semantic segmentation network with an attention mechanism to obtain a binary mask image of the scratch area; according to the original microscopic image and the binary mask image, using the information of the undamaged area around the scratch area to reconstruct the structure and generate the texture of the scratch area through a two-stage scratch repair network to obtain a repaired coal rock microscopic image. The present application solves the problem that the existing technology cannot prepare a complex coal rock microscopic image preparation process, the image quality is low, and it is difficult to meet the coal quality analysis and coal petrology research requirements due to the inefficiency of the physical cutting process and the low fidelity of the repair method.

The present disclosure relates to a coal rock testing device, comprising: a triaxial chamber, an accommodation cavity is formed inside for accommodating a coal rock sample; a pressurizing assembly, one end of which extends into the triaxial chamber, for pressurizing the coal rock sample; a liquid supply assembly, which communicates with the accommodation cavity and injects a salt solution into the accommodation cavity, enabling the salt solution to contact the coal rock sample; and a detection assembly, one end of which extends into the triaxial chamber, capable of acquiring image information and position information of the coal rock sample. The pressurizing assembly, the liquid supply assembly and the detection assembly are connected in the triaxial chamber to simulate the underground environment, test the pressure condition of the coal rock sample in different salt solution environments, and monitor the displacement and damage of the coal rock sample under corresponding conditions to study and evaluate the acquired data, so as to improve the safety and stability of the coal mine underground reservoir operation according to the simulation data.