Preparation material of remolded coal series mudstone sample and batch preparation method thereof

Abstract

The invention belongs to the field of rock mechanics experiments, and relates to a preparation material of a remolded coal series mudstone sample. The preparation material comprises the following components: coal dust, bentonite, clay, quartz sand, cement and water, wherein the mass ratio of all the components is shown in the specification; the coal powder accounts for 5-15% of the total weight ofthe raw materials; the bentonite accounts for 10%-20% of the total weight of the raw materials; the clay accounts for 5-10% of the total weight of the raw materials; the quartz sand accounts for 30%-40% of the total material; the cement accounts for 5%-15% of the total material; of the rest being water. In a laboratory, the characteristics of calcium bentonite or sodium bentonite are utilized tosimulate the water absorption characteristic and expansion deformation characteristic of mudstone, the characteristics of quartz sand and cement are utilized to simulate the sandy components and strength of mudstone, and a certain amount of on-site coal sample, clay and purified water are added. A remodeling experiment rock sample is obtained by using a special plastic drying grinding tool according to different proportions to carry out a rock mechanics experiment, and a proportion closest to the mechanical property of an on-site rock sample is selected to prepare carbonaceous mudstone samplesin batches to carry out mechanical evaluation.

Description

technical field [0001] The invention belongs to the field of rock mechanics experiments, and relates to a preparation material for remodeling coal-measure mudstone samples and a batch preparation method thereof, in particular to a preparation material for remodeling coal-measure mudstone samples that restores the mechanical properties of coal-measure mudstone and its batch preparation method. Background technique [0002] Coal-measure carbonaceous mudstone is a kind of sedimentary rock series associated with coal seams, and its lithology varies greatly. When taking rock samples on site for research, it is inevitable that the obtained rock samples have different mechanical properties, and it is difficult to obtain relatively uniform mechanical parameter comparison data through laboratory experiments. [0003] The invention patent with the publication number CN110482988A discloses a weakly expansive mudstone-like material and its preparation method, including the following co...

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Problems solved by technology

[0006] In view of this, in order to solve the above-mentioned mudstone rock sample remodeling process, the present invention cannot prepare experimental rock samples in batches and the mudstone rock samples after batch remodeling cannot be highly To restore the mechanical properties of on-site carbonaceous mudstone, provide a preparation material for reshaping coal-measure mudstone samples and its batch preparation method

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