Carbon isotope characteristics and its origin of coalbed methane in Jincheng area;

The effect of power sound wave on storage and motion of coalbed methane;

Aimed at the difficulties resulting from the more complex solution and the heavier computation created by the consideration of the influence of the grads of gas volume fracton in the non-steady mobile model of the coalbed methane,the paper introduces the use of the Femlab commercial numerical simulating software to solve the set-up non-steady model by simulation.

By the effective analysis of coal thickness,coa quality,hydrological condition,hidden depth of the coal bed surrounding rock and so on on coal bed methane content in Daxing Well Field expounds slorag of coal bed methane regular pattern and evaluales the necessity and possibity of prospecting and developing of coal bed gas in this area.

It is analysed that the utilization of Ende powdered coal gas-making technology in methanol co-production process can result in a 20% high of CO 2 and a three to five times rise of methane content in gas in view of the characteristics of Ende powdered coal gasification and operational fluidized bed gasification parameters at hand.

Prediction of coalbed gas content based on support vector machine regression;

Put forward in this paper is the model using back-propagation artificial neural networks to predict coal quality parameters and coalbed gas content.