Identification of the Gas Explosion Hazardous Area in a Gob by Numerical Simulations-A Case study of the 6310 Working Face of Tangkou Coal Mine.

In the process of coal mining, gas explosion accidents occur frequently, which seriously affect the safety of mine production. Identifying the gas explosion hazardous zone in a gob is of specific guiding significance for the prevention and control of gas explosion in a coal mine. In this work, we analyze the porosity and gas concentration distribution in the gob after the working face was mined by combining the particle flow and finite-element simulation.

[Mechanism of immune escape in renal cell carcinoma].

Objective: To investigate the mechanism of immune escape in renal cell carcinoma(RCC).

Methods: Fas and FasL expressions were examined by immunohistochemical technique in 44 RCC patients, with the Ki67 expression and apoptosis of tumor infiltrating lymphocytes(TIL) monitored simultaneously. Cytokines including IL2 and IFN alpha were used to induce the expression of the renal carcinoma cell lines 786-0 cells.