Flyash tamping plug and preparation method thereof

Abstract

The invention relates to a flyash tamping plug and a preparation method thereof and belongs to the field of water pressure blasting technology. The flyash tamping plug is prepared from the following raw materials in parts by weight: 90-110 parts of low liquid limit clay (liquid limit (50%)), 5-7 parts of coarse sand, 6-8 parts of flyash and 14-17 parts of water. The preparation method comprises the following steps of: weighing the low liquid limit clay, the coarse sand, the flyash and the water as required and uniformly mixing to form primary material; hardening the primary material for 1-2h and fianlly processing the hardened into a tamping plug rolls. According to the novel tamping plug, flyash and clay powder are used as core materials, local materials are used, and the cost is saved. The corresponding preparation method is simple, the water-retaining property of the obtained product is good, the flyash tamping plug can be stored for 12 hours after being processed into the tamping plug rolls; if coated with a plastic film, the storage time can be further prolonged, and the existing common loess tamping plug only can be stored for 5 hours under no protection.

Description

technical field [0001] The invention belongs to the technical field of hydraulic blasting, and in particular relates to a blasting clay for hydraulic blasting, and also relates to a preparation method of the blasting clay. Background technique [0002] In recent years, with the development of railway engineering, hydraulic blasting technology has become increasingly mature. This technology takes advantage of the incompressible nature of water, and the explosion energy is transmitted to the surrounding rock of the blasthole through water with almost no loss, which is very beneficial to rock breaking. Under the expansion of the explosive gas, the water will produce a "water wedge" effect, which is beneficial to the further breaking of the rock. At the same time, the water in the blast hole can also play the role of atomization and dust reduction, which can greatly reduce dust pollution. [0003] At present, the clay used in practical engineering is mainly loess clay. Howeve...

AI Technical Summary

Problems solved by technology

However, the plasticity of loess blasthole clay is poor, and it is not easy to fill the hole when sealing the hole, and the compactness is not high, which will easily lead to the leakage of explosive power and reduce the utilization rate of the blasthole.