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Safe construction method for side slope base forming during land blasting
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A construction method and a safe technology, applied in the field of safe construction of onshore blasting slope base formation, can solve problems such as safety accidents, threats to life safety, collapse and the like
Active Publication Date: 2021-12-21
GUANGXI NEWHARBOR ENG CO LTD
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Problems solved by technology
[0002] At present, land blasting will inevitably produce hazards such as blasting vibration, shock wave and overpressure, which will affect the safety of nearby buildings (structures) and various facilities and equipment.
In actual operation, due to unreasonable construction operations, it is easy to cause quality defects in blasting, and even cause rock collapse, causing safety accidents and threatening life safety.
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Embodiment 1
[0026] An example of a safe construction method for forming a land blasting slope base of the present invention comprises the following steps:
[0027] (1) Construction preparation: When drilling the first row of holes, in order to make the broken block 2 reach the ideal size, consider the empirical formula broken hole distance a=f, the relevant variables are the broken coefficient K and the hole diameter d, and determine the first row of broken holes according to experience. The distance W of the free surface is used to arrange the construction location for construction. When the size of the crushing block 2 is too large or too small, the distance between the rows of crushing holes b1-b7 can be adjusted appropriately to achieve the optimum size;
[0028] (2) Removing the covering layer: remove the loose accumulation and deposits on the surface of the explosives;
[0029] (3) Development of lateral free surface: there should be a lateral free surface, if there is no lateral f...
Embodiment 2
[0036] Another example of the safe construction method for forming a slope base by land blasting according to the present invention is a construction method for upward cracking by land blasting, which includes the following steps:
[0037] (1) According to the construction situation on site and the specific shape of the stone, combined with the texture structure of the rock itself, the method of upward cracking is adopted;
[0038] (2) The hydraulic splitting adopts the method of layered splitting, and the holes are divided into 3 to 5 rows, with 2 to 8 holes in each row, the drilling depth is 1 to 1.5 meters, the height of the stone does not exceed 2 meters, and the holes are split together.
Embodiment 3
[0040] Another example of the safe construction method for forming the base of the land blasting slope according to the present invention is aimed at rocks with lower tensile strength, comprising the following steps:
[0041] For rocks with low tensile strength, it is easier to break the rock from the inside, as long as enough force is applied from the inside to break the rock. The water booster host can generate extremely high pressure and send it to the expander, and the expander expands to directly transmit the water pressure to the rock wall. When the pressure exceeds the tensile strength of the rock, the rock can crack and shatter.
[0042] Drill holes in parallel within a length of 10 meters and place 50 identical expansion pipes. Every increase of 1 MPa water pressure is equivalent to an increase of 10 tons of expansion force on a plane of 1 square meter. The equipment can be pressurized to 50 MPa and can generate an expansion force of 100 tons. 50 can produce 5000 tons...
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Abstract
The invention provides a safe construction method for side slope base forming during land blasting. The safe construction method comprises the following steps: (1) carrying out construction preparation; (2) removing a covering layer; (3) developing a lateral free surface; (4) carrying out positioning and drilling; (5) mounting a spalling device; (6) breaking rock through pressurization and spalling, releasing pressure and recovering the spalling device; and (7) removing slag so as to complete construction operation once. Through the adoption of the safe construction method, the crushing shape and size can be controlled during land blasting construction; the side slope contour integrity can be protected; a base can be prevented from being disturbed and damaged; such harmful effects as vibrations, impacts and collisions can be reduced; the influence on the surrounding environment can be effectively reduced; and when the safe construction method is adopted for the blasting construction of a building which needs to be protected, the damage of conventional blasting to the environment can be eliminated, the safety can be achieved, and no pollution can be caused.
Description
technical field [0001] The invention relates to a safe construction method for forming a slope base in land blasting, which is suitable for a new technology for maintaining the formation of the slope base in land blasting, so that the formed slope after blasting has a stable structure and improves the construction quality. Background technique [0002] At present, land blasting will inevitably produce hazards such as blasting vibration, shock wave and overpressure, which will affect the safety of nearby buildings (structures) and various facilities and equipment. In actual operation, due to unreasonable construction operations, it is easy to cause quality defects in blasting, and even cause rock collapse, causing safety accidents and threatening life safety. Therefore, it is necessary to carry out strict construction according to certain operating principles and operating steps to ensure the stability of the slope structure. Contents of the invention [0003] The purpose ...
Claims
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Application Information
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