Based on the deformation and damage characteristics of surrounding rock in a large-section gob-side entry retaining combined with field observations an analysis dominant factors, overall control plan is formulated. The mainly includes structure high strength, stiffness ductility for roadside support; reinforcement roadway-in setup hydraulic fracturing pressure release mechanism advanced long, h...

With the increase in mining depth and deterioration of conditions, thick hard overburden movement frequently induces mine earthquakes rock bursts. Some mines are expected to prevent control super through vertical ground well water fracturing technology. However, dynamic underground disaster appears more intense. Taking ‘11.30’ earthquake a Shandong Province as engineering background, mechanism ...

Methods: A cohesive fracture model is adopted together with a discrete crack and without predetermined fracture path. The fracture is filled with interface elements which in the 2D case are quadrangular and triangular elements and in the 3D case are either tetrahedral or wedge elements. The Rankine criterion is used for fracture nucleation and advancement. In a 2D setting the fracture follows d...

The potential hazards and risks associated with well-stimulation in unconventional oil and gas development (hydraulic fracturing, acid fracturing, and matrix acidizing) have been investigated and evaluated and federal and state regulations requiring chemical disclosure for well-stimulation have been implemented as part of an overall risk management strategy for unconventional oil and gas develo...

Process analytical technology (PAT)-tools were used to monitor freeze-drying of Bacille Calmette-Guérin (BCG) at pilot and production scale. Among the evaluated PAT-tools, there is the novel use of the vacuum valve open/close frequency for determining the endpoint of primary drying at production scale. The duration of primary drying, the BCG survival rate, and the residual moisture content (RMC...

1 Department of Pharmaceutics, Seven Hills College of Pharmacy, Tirupathi, AP, India. 2 Faculty, Department of Pharmaceutics, OMER EL MUKHTAR University, Al-Beida, Libiya 3 Department of Pharmaceutical Chemistry, Shankarlingam Bhuvaneswari College of Pharmacy, Sivakasi, TN,India 4 Principal, Seven Hills College of Pharmacy, Tirupathi, AP, India 5 Research Director, Seven Hills College of Pharma...

the berriasian-valanginian fahliyan formation forms one of the giant reservoirs in the subsurface of the abadan plain, onshore iran. a detailed petrographical analysis of the available cores and thin sections revealed that the different diagenetic parameters influenced the reservoir quality of the fahliyan formation in this field. the fahliyan formation has been influenced by three diagenetic e...