In this paper,the data of continuous atmospheric vertical integral vapour and liquid water content during April-June of 1992-1994 obtained by a ground-based dual-channel microwave radiometer are used to analyse the st...In this paper,the data of continuous atmospheric vertical integral vapour and liquid water content during April-June of 1992-1994 obtained by a ground-based dual-channel microwave radiometer are used to analyse the statistical characteristics of atmospheric vapour and liquid water content,and the relative distribution characteristics of vapour and liquid water content in cloudy atmosphere,the correlative relation of integral liquid water content L and ground precipitation intensity I.and precipitation transform rate of precipitation system.Finally,the weather modification condition of precipitus stratiform clouds and seeding potential is analyzed and discussed.展开更多
The evaluation system for coal resources was established and a related software was programmed based on some former achievements and actual situation of the research area. And the evaluating calculation and data proce...The evaluation system for coal resources was established and a related software was programmed based on some former achievements and actual situation of the research area. And the evaluating calculation and data processing were also conducted. The result indicates that in the research area, the resource condition of the 3rd lower coal seam falls in the classes of "good" to "middle". In space, the south and the east parts is better than the north and the west parts. And the east part is suitable for the recent and the near future exploitation and the west part for the long dated exploitation. The distribution regularity of geologic structure and the stability of thickness of coal seams should be studied carefully and more exploration project in the west part should be carried out. The above achievements are significant in the exploitation of coal resource in this region.展开更多
In investigating the effect of biogenic gas production on the recovery of coalbed methane(CBM),coal samples spanning different ranks were applied in the microbial-functioned simulation experiments for biogenic methane...In investigating the effect of biogenic gas production on the recovery of coalbed methane(CBM),coal samples spanning different ranks were applied in the microbial-functioned simulation experiments for biogenic methane production.Based on the biogenic methane yield,testing of pore structures,and the isothermal adsorption data of coals used before and after the simulation experiments,several key parameters related to the recovery of CBM,including recovery rate,gas saturation and ratio of critical desorption pressure to reservoir pressure,etc.,were calculated and the corresponding variations were further analyzed.The results show that one of the significant functions of microbial communities on coal is possibly to weaken its affinity for methane gas,especially with the advance of coal ranks;and that by enhancing the pore system of coal,which can be evidenced by the increase of porosity and permeability,the samples collected from Qianqiu(Yima in Henan)and Shaqu(Liulin in Shanxi)coal mines all see a notable increase in the critical desorption pressure,gas saturation and recovery rate,as compared to the moderate changes of that of Guandi(Xishan in Shanxi)coal sample.It is concluded that the significance of enhanced biogenic gas is not only in the increase of CBM resources and the improvement of CBM recoverability,but in serving as an engineering reference for domestic coalbed biogenic gas production.展开更多
基金Natural Science Foundation of China Meteorological AdministrationNatural Science Foundation of Hebei Province(493128).
文摘In this paper,the data of continuous atmospheric vertical integral vapour and liquid water content during April-June of 1992-1994 obtained by a ground-based dual-channel microwave radiometer are used to analyse the statistical characteristics of atmospheric vapour and liquid water content,and the relative distribution characteristics of vapour and liquid water content in cloudy atmosphere,the correlative relation of integral liquid water content L and ground precipitation intensity I.and precipitation transform rate of precipitation system.Finally,the weather modification condition of precipitus stratiform clouds and seeding potential is analyzed and discussed.
文摘The evaluation system for coal resources was established and a related software was programmed based on some former achievements and actual situation of the research area. And the evaluating calculation and data processing were also conducted. The result indicates that in the research area, the resource condition of the 3rd lower coal seam falls in the classes of "good" to "middle". In space, the south and the east parts is better than the north and the west parts. And the east part is suitable for the recent and the near future exploitation and the west part for the long dated exploitation. The distribution regularity of geologic structure and the stability of thickness of coal seams should be studied carefully and more exploration project in the west part should be carried out. The above achievements are significant in the exploitation of coal resource in this region.
基金supported by the National Natural Science Foundation of China(No.:41472129,41472127,41502158)Key S&T Research Project of coal in Shanxi in 2014(No.MQ2014-01)+1 种基金Shanxi coalbed methane joint research funds project(No.2013012004)Henan S&T Research Project(No.132102210253).
文摘In investigating the effect of biogenic gas production on the recovery of coalbed methane(CBM),coal samples spanning different ranks were applied in the microbial-functioned simulation experiments for biogenic methane production.Based on the biogenic methane yield,testing of pore structures,and the isothermal adsorption data of coals used before and after the simulation experiments,several key parameters related to the recovery of CBM,including recovery rate,gas saturation and ratio of critical desorption pressure to reservoir pressure,etc.,were calculated and the corresponding variations were further analyzed.The results show that one of the significant functions of microbial communities on coal is possibly to weaken its affinity for methane gas,especially with the advance of coal ranks;and that by enhancing the pore system of coal,which can be evidenced by the increase of porosity and permeability,the samples collected from Qianqiu(Yima in Henan)and Shaqu(Liulin in Shanxi)coal mines all see a notable increase in the critical desorption pressure,gas saturation and recovery rate,as compared to the moderate changes of that of Guandi(Xishan in Shanxi)coal sample.It is concluded that the significance of enhanced biogenic gas is not only in the increase of CBM resources and the improvement of CBM recoverability,but in serving as an engineering reference for domestic coalbed biogenic gas production.
