Design method for rock biaxial compression blasting

A blasting design and rock technology, applied in the direction of applying stable tension/pressure to test the strength of materials, measuring devices, instruments, etc., can solve the problems of heavy workload, easy damage to rock samples, lack of theoretical basis, etc., and achieve low cost , the workload is small, the effect of saving manpower and material resources

Active Publication Date: 2019-07-05
SICHUAN UNIV
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Problems solved by technology

[0009] In order to solve the problems existing in the prior art, the present invention provides a rock biaxial compression blasting design method, which solves the lack of theoretical basis, experimental parameter design guidance, heavy workload, and confining pressure loading method that is easy to damage rocks in previous test methods. sample problem

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[0057] The specific embodiments of the present invention are described below so that those skilled in the art can understand the present invention, but it should be clear that the present invention is not limited to the scope of the specific embodiments. For those of ordinary skill in the art, as long as various changes Within the spirit and scope of the present invention defined and determined by the appended claims, these changes are obvious, and all inventions and creations using the concept of the present invention are included in the protection list.

[0058] like Figure 4 As shown, a rock biaxial compression blasting design method, the method includes the following steps:

[0059] Step S1: Obtain the basic mechanical parameters of the rock;

[0060] Step S2: theoretically modeling the dynamic mechanical response of the blast hole during the propagation of cylindrical blast waves under biaxial compression;

[0061] Step S3: The rock mass under the plane strain and plan...

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Abstract

The invention discloses a design method for rock biaxial compression blasting. The method includes the following steps: step S1, obtaining the basic mechanical parameters of rock; step S2, performingtheoretical modeling on the dynamic mechanical response of blast holes during the propagation of cylindrical surface blast waves under a biaxial compression condition; step S3, utilizing a classic Kirsch method to calculate the static stress distribution at the peripheries of the blast holes when the rock is subjected to uniformly distributed horizontal confining pressure Px and vertical confiningpressure Py under plane strain and plane stress conditions; and step S4, adopting a Laplace transform method to solve the dynamic response of the blast holes when the inner walls of the blast holes are subjected to the action of explosion loading under the plane strain condition; Thus, the problems of lack of theoretical basis and guidance of experimental parameter design, large workloads and easy destruction on rock samples by confining pressure loading modes of previous testing methods can be solved.

Description

technical field [0001] The invention relates to the field of rock biaxial compression blasting design, in particular to a rock biaxial compression blasting design method. Background technique [0002] With the process of urbanization and the development of industrialization, the resources in the shallow part of the earth are gradually exhausted, and the surface environment continues to deteriorate. The main battlefield for human development and utilization of resources is constantly shifting to the deep part of the earth. Drilling and blasting method (drilling and blasting method) is widely used in various underground tunnel excavation and mining activities due to its strong adaptability to rock geological conditions and low excavation cost. It is generally believed that during the excavation of underground space, the rock will be in the following two stress states: one is the plane stress state, which mainly exists at the tunnel excavation boundary, and its characteristic i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N3/313
CPCG01N3/08G01N3/313G01N2203/0026G01N2203/0254
Inventor 鲁功达陶剑杨兴国徐昊周家文李洪涛
Owner SICHUAN UNIV
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