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Bore construction method by bore explosion

A construction method and deep well technology, which can be used in sinking, shaft equipment, earthwork drilling and mining, etc. It can solve the problems of high chemical consumption, difficulty in meeting project needs, poor blasting effect, etc., and achieve the effect of improving project progress

Inactive Publication Date: 2003-08-06
中国人民解放军工程兵第四十一旅
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Problems solved by technology

From the perspective of rock crushing theory, this method does not break away from Livingston’s blasting funnel crushing principle. It also uses a large amount of medicine consumption and poor blasting effect to crush rocks alone, which is important for protecting the stability of surrounding rock and ensuring Safe construction doesn't do much
[0004] In summary, the existing shaft construction methods are difficult to meet the engineering needs

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  • Bore construction method by bore explosion
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Embodiment Construction

[0010] The construction method of deep well blasting into a well of the present invention is described in detail with reference to the drawings and embodiments as follows: the depth of the well to be dug is 26.5m, and two horizontal roadways with different elevations must be connected by a vertical shaft. The horizontal section of the shaft is circular, with a diameter of 5.50m and a depth of 26.50m. The total excavation volume is 629.30m 3 . The entire shaft is in sandstone, with well-developed rock masses and severe weathering, with Platts coefficient f=7-9. According to the construction conditions, the design adopts the full-face and full-depth one-time drilling charge, and uses two sections of detonators to perform millisecond blasting with a delay of 50ms. The surrounding area is pre-cracked, and then the rock mass in the well is crushed, broken and cracked at the same time. The ballast can slide down automatically, that is, the overall plan adopts a deep well construction me...

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Abstract

The present invention provides a deep shaft one-step explosion well-forming construction method, and it is characterized by that three types of blast-holes can be drilled on the full face of the deepshaft, first type is of rock presplitting holes which are distributed along periphery of circular well to make peripheral smoothwall blasting, second type is of rock breaking holes which are distributed on the inner side of peripheral presplitting holes, and third type is of pulverizing holes with are distributed in the axis zone of shaft. The presplitting hole adopts non-coupled air column spaced charging powder, and the breaking hole and pulverizing hole adopt conventional non-coupled continuously-charging powder.

Description

Technical field [0001] The deep well blasting construction method of the present invention belongs to the technical field of shaft excavation. Background technique [0002] Shaft excavation is the most difficult part of underground engineering construction. The use of blasting technology is one of the basic conditions for improving the progress of the shaft, and there are many deep-hole blasting construction methods. There are also more reports in the literature. For example, the papers of the Kunming Soil and Rock Blasting Conference of Changsha Mine Research Institute, titled [Shaft Deep Hole Blasting] (see China National Defense Science and Technology Information Center Collection GF06924); an article published in 1981 by the Underground Oil Depot Engineering Company of the Ministry of Petroleum Industry, titled [Shaft Shaft Deep-hole segmented smooth blasting method-application in underground oil depot engineering] (see China National Defense Science and Technology Informatio...

Claims

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Application Information

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IPC IPC(8): E21D1/00
Inventor 燕鸣龚银廉黄坚裴瑞珠王勇崔晓明孙合群姜新伟杜长江
Owner 中国人民解放军工程兵第四十一旅
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