A few days ago, Russian scholars used ultra-high-frequency radio wave blasting to mine stone materials based on the traditional explosive blasting method. Compared with traditional mining methods, the Russian scholars not only have relatively low cost and high safety, but also improve the quality of quarrying. It reduces the discharge of gravel waste residue, and the method is also applicable to urban building demolition, gravel and other purposes. There are three traditional methods of quarrying: diamond wire saw cutting, high pressure gas bursting and blasting. Russian experts pointed out that the most widely used method in Russia is the blasting method, which has the lowest cost, but has many disadvantages. First of all, blasting causes 30% of the blocks to become useless gravel and dust, while 70% of the block material size is different, the quality is not high, and on-site secondary processing is required. Secondly, 30% gravel waste The emissions have greatly increased the transportation cost and the impact on the ecological environment. Third, the blasting operation has great safety hazards, which are dangerous and require skilled workers to operate. Therefore, Russian scholars have improved the third method of quarrying in response to this situation. They use radio wave radiation to replace the traditional explosive fuse or electronic fuse, and progressively detonate the explosive placed in the rock hole, thereby gradually increasing the pressure in the sealed hole until the high pressure cracks the rock. The key to this approach is the need for a reasonable match between the intensity of the radio wave illumination and the amount of detonator. In order to test this method, Russian scholars selected a concrete block of size 600 × 600 × 600 mm for testing. They first cut a small hole in the concrete block, put in a mixture of ammonium nitrate and diesel, then sealed and solidified with a mortar filled with polymer, and then used an ultra-high frequency radio with a power of 1200 watts and a frequency of 2.45 GHz. The wave illuminates the concrete block, and within two minutes the concrete block is split into several small pieces with no additional cracks on the small pieces. At the same time, it was found in the experiment that the greater the intensity of radio wave irradiation, the shorter the cracking time of the rock and the smaller the split stones.
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