Wall protecting device and hole-wall pressure testing method

Abstract

The invention discloses a wall protecting device and a hole-wall pressure testing method. The wall protecting device comprises an energy-gathered wall protecting semicircular sleeve, a strain gauge stripping, a dynamic stress sensor and a data line. The energy-gathered wall protecting semicircular sleeve mainly protects a reserved rock mass and reduces the situation that the reserved rock mass isextruded and damaged due to the fact that detonation gas is wedged into primary and secondary cracks of the hole wall; the stripping is mainly used for supporting the energy-gathered wall protecting semicircular sleeve and increasing the non-coupling property between the energy-gathered wall protecting semicircular sleeve and the hole wall; and the dynamic stress sensor is mainly used for monitoring the hole wall pressure in the blasting process and providing a reference for later optimization design of the spacing between the energy-gathered wall protecting semicircular sleeve and the hole wall and the explosive charging spacing. According to the wall protecting device and the hole-wall pressure testing method, smooth blasting of different lithology can be achieved, through feedback of data, an explosive charging structure and the spacing between the energy-gathered wall protecting semicircular sleeve and the hole wall are continuously subjected to optimization design, and under the condition of ensuring the excavation rock mass, the purpose of effectively reducing blasting vibration and reserved rock mass damage can be achieved.

Description

technical field [0001] The invention relates to a wall protection device and a hole wall pressure testing method, belonging to the technical field of blasting engineering. Background technique [0002] At present, in the excavation of high and steep slopes and the construction of large-scale underground projects, the drilling and blasting method is generally used to excavate rock masses. When using the drilling and blasting method to excavate the rock mass, on the one hand, the blasting needs to produce enough power to damage the rock mass to realize the excavation of the rock mass blasting project; on the other hand, it is necessary to shape the reserved rock mass and prevent During the blasting process, the formed rock mass is greatly damaged. [0003] In order to solve this problem, in the prior art, pre-splitting blasting and smooth blasting technologies are adopted, and an energy-concentrating wall protection device is used to prevent blast shock waves from damaging th...

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Problems solved by technology

[0007] In order to solve the deficiencies of the prior art, the object of the present invention is to provide a wall protection device and a hole wall pressure testing method, which can solve the current problem that the pressure distribution inside the blast hole cannot be monitored in real time, and improve the stability and effect of blasting

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