Theoretical Analysis of the Mechanical Effects of Water Jet

被引：4

作者：

Li, Biao ^{[1
]}

Hu, Mengmeng ^{[1
]}

Zhang, Bo ^{[2
]}

Zhang, Chao ^{[1
]}

Liu, Zhengyu ^{[1
]}

Nie, Lichao ^{[1
]}

Cao, Wenzheng ^{[1
]}

机构：

[1] Shandong Univ, Geotech & Struct Engn Res Ctr, Jinan 250061, Peoples R China

[2] Shandong Univ, Sch Civil Engn, Jinan 250061, Peoples R China

来源：

GEOTECHNICAL AND GEOLOGICAL ENGINEERING | 2021年 / 39卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Water jet stress distribution; Stagnation pressure; Rock damage; Elasticity; Mohr-Coulomb yield criterion; LIQUID IMPACT; ROCK-BREAKING; FRACTURE; DEFORMATION; PRESSURE; EROSION; SOLIDS; DAMAGE; PERFORMANCE; COAL;

D O I：

10.1007/s10706-020-01488-y

中图分类号：

P5 [地质学];

学科分类号：

0709 ; 081803 ;

摘要：

The mechanical characteristics and stress state caused by water jet loading are influenced by many factors that have restricted studies on the jet mechanism. Using the basic theory of elasticity and fluid dynamics, the mechanical effects of water jet loading are analyzed. Based on the simplified jet distribution pressure, the elastic analytical solution of the stress distribution in a semi-infinite plane under the jet distribution pressure is derived, and the stress distribution characteristics are discussed. In addition, the Mohr-Coulomb yield criterion served as a fracture criterion, enabling establishment of the relationship between jet pressure and rock strength. The results indicate that the compressive stress is symmetrically distributed around the jet axis with the maximum at the center. Conversely, the shear stress is Anti-symmetrically distributed around the jet axis with the maximum at the point (0.5r, +/- 0.65r). The initial fracture of rock under the impact of water jet is mainly shear compression failure. The Mohr-Coulomb yield criterion is useful for estimating the relationships between the rock failure zone diameter with the water jet impact pressure.

引用

页码：237 / 246

页数：10

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