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ASTM D4645-87(1997)
Standard Test Method for Determination of the In-Situ Stress in Rock Using the Hydraulic Fracturing Method
Automaticky preložený názov:
Štandardná skúšobná metóda pre stanovenie in - situ napätie v Rocku Použitie hydraulické štiepenie metódy
NORMA vydaná dňa 10.5.1997
Informácie o norme:
Označenie normy: ASTM D4645-87(1997)
Poznámka: NEPLATNÁ
Dátum vydania normy: 10.5.1997
Kód tovaru: NS-28015
Počet strán: 7
Približná hmotnosť: 21 g (0.05 libier)
Krajina: Americká technická norma
Kategória: Technické normy ASTM
Anotácia textu normy ASTM D4645-87(1997) :
Keywords:
Breakdown pressure, Field testing-rock, Fracture testing-rock, Minifracturing, Permeability-soil/rock, Porosity, Pressure testing-rock, Rock, Stress-soil/rock, Tension (tensile) properties/tests-soil/rock/related materials, in-situ stress-rock, using hydraulic fracturing method, test,, Cavern design, Hydrofractured rock, Pressure tunnel lining, Tunnels, in-situ stress-rock using the hydraulic fracturing method, test,, Hydraulic fracturing method, in-situ stress-rock, test
Doplňujúce informácie
| 1. Scope | ||||||||||
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1.1 This test method covers the determination of the in-situ state of stress in rock by hydraulic fracturing. Note 1-Hydraulic fracturing for stress determination is also referred to as hydrofracturing, and sometimes as minifracing. Hydraulic fracturing and hydrofracturing may also refer to fracturing of the rock by fluid pressure for the purpose of altering rock properties, such as permeability and porosity.1.2 Hydraulic fracturing is the only widely accepted field method available for in situ stress measurements at depths greater than 50 m. It can be used in drill holes of any diameter. 1.3 Hydraulic fracturing can also be used in short holes for which other stress measuring methods, such as overcoring, are also available. The advantage of hydraulic fracturing is that it yields stresses averaged over a few square metres (the size of the induced hydraulic fracture) rather than over grain size areas, as in the case of overcoring techniques. 1.4 The values stated in SI units are to be regarded as the standard. 1.5 This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. |
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| 2. Referenced Documents | ||||||||||
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