Fracture Analysis Before and After Hydraulic Fracturing in the Marcellus Shale Using the Mohr-Coulomb Failure Criteria

2019 ◽  
Author(s):  
Kaitlin Evans ◽  
Randy Toth ◽  
Tobi Ore ◽  
Jarrett Smith ◽  
Natalia Bannikova ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Marcellus Shale ◽  
Failure Criteria ◽  
Fracture Analysis ◽  
Coulomb Failure ◽  
Before And After

scholarly journals Directional Hydraulic Fracturing (DHF) of the Roof, as an Element of Rock Burst Prevention in the Light of Underground Observations and Numerical Modelling

Energies ◽  
2021 ◽  
Vol 14 (3) ◽  
pp. 562
Author(s):  
Marek Jendryś ◽  
Andrzej Hadam ◽  
Mateusz Ćwiękała
Keyword(s):  
Rock Mass ◽  
Hydraulic Fracturing ◽  
Coal Mining ◽  
Rock Burst ◽  
Coal Mine ◽  
Seismic Activity ◽  
Black Coal ◽  
Directional Hydraulic Fracturing ◽  
Before And After ◽  
The Face

The following article analyzes the effectiveness of directional hydraulic fracturing (DHF) as a method of rock burst prevention, used in black coal mining with a longwall system. In order to define changes in seismic activity due to DHF at the “Rydułtowy” Black Coal Mine (Upper Silesia, Poland), observations were made regarding the seismic activity of the rock mass during coal mining with a longwall system using roof layers collapse. The seismic activity was recorded in the area of the longwall itself, where, on a part of the runway, the rock mass was expanded before the face of the wall by interrupting the continuity of the rock layers using DHF. The following article presents measurements in the form of the number and the shock energy in the area of the observed longwall, which took place before and after the use of DHF. The second part of the article unveils the results of numerical modeling using the discrete element method, allowing to track the formation of goafs for the variant that does not take DHF into consideration, as well as with modeled fractures tracing DHF carried out in accordance with the technology used at “Rydułtowy” coal mine.

Influence of Reactive Flow Conditions on Barite Scaling in Marcellus Shale during Stimulation and Shut-In Periods of Hydraulic Fracturing

2020 ◽  
Vol 34 (11) ◽  
pp. 13625-13635
Author(s):  
Wei Xiong ◽  
Magdalena Gill ◽  
Johnathan Moore ◽  
Dustin Crandall ◽  
J. Alexandra Hakala ◽  
...  
Keyword(s):  
Hydraulic Fracturing ◽  
Marcellus Shale ◽  
Reactive Flow ◽  
Flow Conditions

scholarly journals Bearing Capacity Analysis and Zoning of Kathmandu for Shallow Foundations

2018 ◽  
Vol 4 ◽  
pp. 111-117
Author(s):  
Ram Krishna Danai ◽  
Indra Prasad Acharya
Keyword(s):  
Bearing Capacity ◽  
Numerical Models ◽  
Failure Criteria ◽  
Unit Weight ◽  
Soil Parameters ◽  
Primary Concern ◽  
Borehole Data ◽  
Element Analysis ◽  
Theoretical Approaches ◽  
Coulomb Failure

The bearing capacity of foundation is the primary concern in the field of geotechnical engineering. In this study numerical models are developed for each of the secondary borehole data collected around Kathmandu valley. Finite element analysis (i.e. PLAXIS 2D) is carried out using Mohr-coulomb failure criteria to represent two dimensional soil models. Foundation is aimed to model as square footing and prescribed settlement of 10% of footing width is provided to obtain corresponding bearing capacity. In plaxis, effective stress is considered as an ultimate bearing capacity. Drained behavior with axisymmetical models have been considered for soil model in plaxis software. Various soil parameters like C (Cohesion), γ (unit weight), Φ (Frictional angle), ν (Poison ratio), E (Elasticity) for each 1.5m and 3m depths have been considered in models and in theoretical approaches.

scholarly journals Evaluating Leachability of Residual Solids from Hydraulic Fracturing in the Marcellus Shale

2014 ◽  
Vol 2014 (19) ◽  
pp. 1581-1592 ◽  
Author(s):  
Stephanie Countess ◽  
Gregory Boardman ◽  
Richard Hammack ◽  
Alexandra Hakala
Keyword(s):  
Hydraulic Fracturing ◽  
Marcellus Shale
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