Simple smooth blasting drilling and charging method for medium-hard rock

Abstract

The invention relates to the technical field of mining, and discloses a simple smooth blasting drilling and charging method for medium-hard rock, which comprises the following operation steps: S1, rock drilling: firstly, drilling four empty holes, arranging a section of slotting hole in the center of the four empty holes, forming an expanded slot cavity between a section of expanded slot hole and each empty hole after the section of expanded slot hole is blasted, and arranging a section of expanded slot hole in the middle of each empty hole; four three-section groove expanding holes are formed in the periphery of the opposite angles of the groove cavity; the second section, the third section, the fourth section and the fifth section are alternately arranged in a square mode and a rhombus mode in sequence, the third section of other blast holes are positioned, peripheral holes are symmetrically formed in the left side and the right side of the outermost side of the expanded slotted hole, a bottom hole is formed in the bottom of the outermost side of the expanded slotted hole, an auxiliary hole is formed in the top of the outermost side of the expanded slotted hole, and a top hole distributed in an arc shape is formed in the top of the auxiliary hole; s4, the blast holes are filled with coiled explosives; and S5, blasting: according to the principle that detonators at the same section position are loaded in each group of slot expanding holes, detonator section positions are gradually increased in sequence for charging. According to the method, the number of drilled holes is small, the drilling and charging time is short, the blasting success rate is high, and the blasting cost is low.

Description

Technical field: [0001] The invention relates to the technical field of mining, in particular to a simple optical explosion drilling and charge method for medium-hard rock. Background technique: [0002] With the development of science and technology, the requirements for mine construction are getting higher and higher. The efficiency of tunneling in underground mines has always been an important factor affecting mining engineering. Among these roadways, medium hard rock roadways account for a large proportion. Rock drilling jumbo has fast drilling speed, can shorten non-drilling time, high degree of automation, safe construction, high construction quality, good working environment for tunnel excavation, high mechanization level of construction work, and can implement advanced drilling advantages of technology. With the continuous improvement of rock drilling and blasting technology, rock drilling rigs are increasingly showing their superiority in production and constructi...

AI Technical Summary

Problems solved by technology

[0003] There are many factors that restrict the footage and blasting cost of a single shot of a trolley. The most important thing is that the employees have limited effective rock drilling time. At present, the mining industry can complete a row of blasting holes without any impact under the current arrangement of light blasting holes. The drilling time of the hole needs to be guaranteed to be about 4 hours, plus 2 hours for the charge, the entire blasting process takes nearly 6 hours, and there are often various uncertain factors in the actual production process, for example, due to the Due to the long distance, the work surface of the section team is scattered, it takes a long time for trolleys to take over shifts, it takes a long time to arrive at the site, it takes a long time to check the roof at the broken surrounding rock, and the impact of equipment failure is limited by objective conditions. Thus affecting the construction progress and various technical and economic indicators

[0004] The traditional light-explosion drilling and charging method has more holes, long drilling and charging time, low blasting success rate, high consumption of explosives, detonators, drill bits and other materials, making the blasting cost higher

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