A scheme is described for the automatic domain decomposition and creation of overset grids around surface discontinuities. Curves along surface discontinuities are called seam curves. The seam curves are rst automatically extracted from a multiple panel network description of the surface. Points where three or more seam curves meet are automatically identied and are called seam corners. Surface...

The paper begins by outlining the role and importance of coal as a source of energy and in the steel industry. It briefly describes the longwall method of working together with the conventional machinery used in the method. A mathematical model is then proposed that shows the relationship between the gradient of the coal seam, that of the face and the entries to the panel. Determination of a mo...

An important type of nonsampling error that has been identified in the Survey of Income and Program Participation (SIPP) is known as the seam effect. The SIPP is a panel survey with an interval of four months between waves, but with information on many income sources being collected on a monthly basis. A common finding has been that more month-to-month changes in recipiency of most income types...

Aiming at the problem of gas control in upper corner steeply inclined coal seam, taking 3103 working face a mine as an example, this paper determines height range fracture zone by combining theoretical empirical formula with on-site investigation microseismic monitoring technology, designs parameters drainage borehole during production, and analyzes effect long-strike through experiments. The r...

Room-and-pillar mining with pillar recovery has historically been associated with more than 25% of all ground fall fatalities in underground coal mines in the United States. The risk of ground falls during pillar recovery increases in multiple-seam mining conditions. The hazards associated with pillar recovery in multiple-seam mining include roof cutters, roof falls, rib rolls, coal outbursts, ...

The bacterial superantigen staphylococcal enterotoxin A (SEA) is an efficient activator of cytotoxic T cells when presented on major histocompatibility complex (MHC) class II molecules of target cells. Our previous studies showed that such SEA-directed T cells efficiently lysed chronic B-lymphocytic leukemia (B-CLL) cells. Next, we made a mutated SEA-protein A (SEAm-PA) fusion protein with more...

Abstract The height of the fracture zone in mined-out area is basic parameter for controlling mine strata, preventing and water, arranging drilling holes high-level gas extraction. Aiming at development law steep seam limitation traditional inspection method, microseismic monitoring technology used to investigate goaf. Taking 3103 south working face a Sichuan as an example, scheme data collecti...