If you will use Hoek-Brown in your Python code, you may want to recommend some constants based on rock type. There is a widely used table in literature by Hoek and others that we use to select Modulus Ratio and material constant (mi) in the absence of high quality laboratory tests.
I have done the manual labour, don't write it all again. A dictionary called RockDict is given in the following Gist. Rock types are given as keys of dict and a sub-dictionary with:
"""
Hoek-Brown parameters in literature by Berk Demir
This is a simple dictionary called "RockDict" for different rock types and their mi and MR values. Deviations (± from the average) are also stored as miSTD and MRSTD.
Keys: Rock Types.
Sub-dictionary keys:
* "MR": Modulus Ratio - int
* "MRSTD": Deviation of Modulus Ratio - int
* "Type": Rock type - str
* "mi": Hoek-Brown constant
* "mi": Deviation of mi.
Prepared using Plaxis Reference Manual.
"""
RockDict = {
"Agglomerate": {
"MR": 500,
"MRSTD": 100,
"Type": "Igneous",
"mi": 19,
"miSTD": 3,
},
"Amphibolites": {
"MR": 450,
"MRSTD": 50,
"Type": "Metamorphic",
"mi": 26,
"miSTD": 6,
},
"Andesite": {
"MR": 400,
"MRSTD": 100,
"Type": "Igneous",
"mi": 25,
"miSTD": 5,
},
"Anhydrite": {
"MR": 350,
"MRSTD": 0,
"Type": "Sedimentary",
"mi": 12,
"miSTD": 2,
},
"Basalt": {
"MR": 350,
"MRSTD": 100,
"Type": "Igneous",
"mi": 25,
"miSTD": 5,
},
"Breccia-I": {
"MR": 500,
"MRSTD": 0,
"Type": "Igneous",
"mi": 19,
"miSTD": 5,
},
"Breccia-S": {
"MR": 290,
"MRSTD": 60,
"Type": "Sedimentary",
"mi": 19,
"miSTD": 5,
},
"Chalk": {
"MR": 1000,
"MRSTD": 0,
"Type": "Sedimentary",
"mi": 7,
"miSTD": 2,
},
"Claystones": {
"MR": 250,
"MRSTD": 50,
"Type": "Sedimentary",
"mi": 4,
"miSTD": 2,
},
"Conglomerates": {
"MR": 350,
"MRSTD": 50,
"Type": "Sedimentary",
"mi": 21,
"miSTD": 3,
},
"Dacite": {
"MR": 400,
"MRSTD": 50,
"Type": "Igneous",
"mi": 25,
"miSTD": 3,
},
"Diabase": {
"MR": 325,
"MRSTD": 25,
"Type": "Igneous",
"mi": 15,
"miSTD": 5,
},
"Diorite": {
"MR": 325,
"MRSTD": 25,
"Type": "Igneous",
"mi": 25,
"miSTD": 5,
},
"Dolerite": {
"MR": 350,
"MRSTD": 50,
"Type": "Igneous",
"mi": 12,
"miSTD": 3,
},
"Dolomites": {
"MR": 425,
"MRSTD": 75,
"Type": "Sedimentary",
"mi": 9,
"miSTD": 3,
},
"Gabbro": {
"MR": 450,
"MRSTD": 50,
"Type": "Sedimentary",
"mi": 27,
"miSTD": 3,
},
"Gneiss": {
"MR": 525,
"MRSTD": 225,
"Type": "Metamorphic",
"mi": 28,
"miSTD": 5,
},
"Granite": {
"MR": 425,
"MRSTD": 125,
"Type": "Igneous",
"mi": 32,
"miSTD": 3,
},
"Granodiorite": {
"MR": 425,
"MRSTD": 125,
"Type": "Igneous",
"mi": 29,
"miSTD": 3,
},
"Greywackes": {
"MR": 350,
"MRSTD": 0,
"Type": "Sedimentary",
"mi": 18,
"miSTD": 3,
},
"Gypsum": {
"MR": 350,
"MRSTD": 0,
"Type": "Sedimentary",
"mi": 8,
"miSTD": 2,
},
"Hornfels": {
"MR": 550,
"MRSTD": 150,
"Type": "Metamorphic",
"mi": 19,
"miSTD": 4,
},
"Limestone (Crystalline)": {
"MR": 500,
"MRSTD": 100,
"Type": "Sedimentary",
"mi": 12,
"miSTD": 3,
},
"Limestone (Micritic)": {
"MR": 900,
"MRSTD": 100,
"Type": "Sedimentary",
"mi": 9,
"miSTD": 2,
},
"Limestone (Sparitic)": {
"MR": 700,
"MRSTD": 100,
"Type": "Sedimentary",
"mi": 10,
"miSTD": 2,
},
"Marble": {
"MR": 850,
"MRSTD": 150,
"Type": "Metamorphic",
"mi": 9,
"miSTD": 3,
},
"Marls": {
"MR": 175,
"MRSTD": 25,
"Type": "Sedimentary",
"mi": 7,
"miSTD": 2,
},
"Metasandstones": {
"MR": 250,
"MRSTD": 50,
"Type": "Metamorphic",
"mi": 19,
"miSTD": 3,
},
"Migmatite": {
"MR": 375,
"MRSTD": 25,
"Type": "Metamorphic",
"mi": 29,
"miSTD": 3,
},
"Norite": {
"MR": 375,
"MRSTD": 25,
"Type": "Igneous",
"mi": 20,
"miSTD": 5,
},
"Peridotite": {
"MR": 275,
"MRSTD": 25,
"Type": "Igneous",
"mi": 25,
"miSTD": 5,
},
"Phyllites": {
"MR": 550,
"MRSTD": 250,
"Type": "Metamorphic",
"mi": 7,
"miSTD": 3,
},
"Porphyries": {
"MR": 400,
"MRSTD": 0,
"Type": "Igneous",
"mi": 20,
"miSTD": 5,
},
"Quartzites": {
"MR": 375,
"MRSTD": 75,
"Type": "Metamorphic",
"mi": 20,
"miSTD": 3,
},
"Rhyolite": {
"MR": 400,
"MRSTD": 100,
"Type": "Igneous",
"mi": 25,
"miSTD": 5,
},
"Sandstones": {
"MR": 275,
"MRSTD": 75,
"Type": "Sedimentary",
"mi": 17,
"miSTD": 4,
},
"Schists": {
"MR": 675,
"MRSTD": 425,
"Type": "Metamorphic",
"mi": 12,
"miSTD": 3,
},
"Shales": {
"MR": 200,
"MRSTD": 50,
"Type": "Sedimentary",
"mi": 6,
"miSTD": 2,
},
"Siltstones": {
"MR": 375,
"MRSTD": 25,
"Type": "Sedimentary",
"mi": 7,
"miSTD": 2,
},
"Slates": {
"MR": 500,
"MRSTD": 100,
"Type": "Metamorphic",
"mi": 7,
"miSTD": 4,
},
"Tuff": {"MR": 300, "MRSTD": 100, "Type": "Igneous", "mi": 13, "miSTD": 5,},
}