Drilling into a rock massif is energetically extremely consumptive process. Hence the optimization of drilling regime with objective of energy consumption minimization, is very important. Proposed article discusses partial problem of this problem. During the drilling process it is useful to know the drilled rock type, whereas to particular drilled rock needs convenient drilling regime, which is...

The paper describes a case study of the safety hydraulic system damage in working longwall Polish coal mine. elements are component powered roof supports which secure shield against during rock burst incidents. event, occurred mining process, caused uncontrolled lowering support height process. may cause danger loss stability along form and collapses represent serious immediate to health employ...

In situ fluidization mining is a promising method which shows considerable potential for reducing the ecological influence impacts of coal mining. During mining, gangue will be separated from ores, filled back, and returned to excavation region, which, depending on filling rate, greatly reduces stratum deformation strata, rate. Numerical simulations can assist engineers in evaluating optimizing...

protein serine/threonine kinase (ROCK), is one of the central regulatory molecules for cytoskeleton control and cell adhesion process. ROCK also involves in other cell functions such as apoptosis and tumor invasiveness. Rho kinase is thought to play an important role in a variety of cellar functions such as stress fiber formation, focal adhesion formation, cell aggregation, cell morphology, cyt...

Differentiated Services (Diffserv) which was proposed by Internet Engineering Task Force (IETF), is a scalable and robust model for providing the end-to-end QoS. In the Diffserv networks, metering mechanisms are used to measure traffic stream. The single rate Three Color Meter (srTCM) [1],which was proposed by IETF,‏ meters an IP packet stream and marks its packets either green, yellow, or red....

In this work, the effect of rock bolt angle on the shear behavior of Rock Bridges is investigated using the particle flow code in two dimensions (PFC2D) for three different Rock Bridge lengths. Firstly, the calibration of PF2D is performed to reproduce the gypsum sample. Then the numerical models with the dimensions of 100 mm * 100 mm are prepared. The Rock Bridge is created in the middle of th...

Objective(s) Theophylline, a xanthenes derivative, is still widely used as an effective bronchodilator in the management of asthmatic patients. It is used both as a prophylactic drug and to prevent acute exacerbations of asthma. The aim of study was to formulate and evaluate effect of the microencapsulation of theophylline loaded nanoparticles on the reduction of burst release. Materials and Me...

: With the large-scale development of mining industry, soil and water loss, environmental pollution other geological disasters ac-companied by coal are continually increasing. Therefore, while promoting mine production relying on scientific technological progress, measures to control reduce resulting cannot be ignored. In this paper, taking Xiezhuang as an example, we have combined its actual c...