Struct RockModel 

pub struct RockModel {
    pub ucs: f64,
    pub mi: f64,
    pub gsi: f64,
    pub d: f64,
}

Rock mass model using the generalized Hoek-Brown failure criterion.

Fields

ucs: f64

Uniaxial compressive strength of intact rock UCS [Pa].

mi: f64

Intact rock parameter mi [-].

gsi: f64

Geological strength index GSI [-], 0–100.

d: f64

Disturbance factor D [-], 0 (undisturbed) to 1 (heavily blasted).

Implementations

impl RockModel

pub fn new(ucs: f64, mi: f64, gsi: f64, d: f64) -> Self

Create a new Hoek-Brown rock mass model.

pub fn granite() -> Self

Typical granite (hard, good rock mass).

pub fn shale() -> Self

Typical shale (weak, moderate rock mass).

pub fn mb_parameter(&self) -> f64

Reduced m_b parameter for rock mass.

mb = mi * exp((GSI - 100) / (28 - 14D))

pub fn s_parameter(&self) -> f64

Rock mass s parameter (intercept of HB criterion).

s = exp((GSI - 100) / (9 - 3D))

pub fn a_parameter(&self) -> f64

Rock mass a parameter (shape exponent).

a = 0.5 + (1/6)*(exp(-GSI/15) - exp(-20/3))

pub fn yield_hoek_brown(&self, sigma1: f64, sigma3: f64) -> bool

Hoek-Brown yield check: returns true if (σ1, σ3) exceeds HB envelope.

σ1 ≥ σ3 + UCS*(mb*σ3/UCS + s)^a → yielding

pub fn uniaxial_compressive_strength_rock(&self) -> f64

Uniaxial compressive strength of the rock mass [Pa].

σ_cm = UCS * s^a

pub fn tensile_strength_rock(&self) -> f64

Tensile strength of rock mass [Pa].

σ_t = -s * UCS / mb

pub fn deformation_modulus(&self) -> f64

Rock mass deformation modulus [Pa] (Hoek et al. 2002).

Em = (1 - D/2)*sqrt(UCS/100)*10^((GSI-10)/40) [GPa] → Pa

Trait Implementations

impl Clone for RockModel

fn clone(&self) -> RockModel

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for RockModel

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.