Gas control technology and applications for the three-soft coal seam based on VLD-1000 drilling systems

作者：Lin Bai Quan^*; Li Qing Zhao; Yang Wei; Wu Hai Jin; Hao Zhi Yong

来源：Journal of China Coal Society, 2011, 36(12): 1968-1973.

• Coal seams
• Drilling systems
• Effective measures
• Gas concentration
• Gas control
• Gas drainage
• Geological characteristics
• Three-soft coal seam
• Ventilation air methane
• VLD-1000 drilling system
• Working face

Abutment pressure distributions of overlying coal seam and horizontal zone partitions of gob area were analyzed systematically. Based on the coal mine geological characteristics, "three dimensional" gas comprehensive drainage technique was proposed and applied in the No. 51109 working face of Jiaojiazhai Coal Mine, China. The results show that after the gas control technique implemented, the gas drainage ratio of No. 51109 coal seam significantly increases to 67.3%, the gas concentration of ventilation air methane(VAM) decreases to 0.3%, and the imbalance factor of gas emission correspondingly decreases from 2.5 to 1.6. The difficult problems of gas over emitted are effectively solved in this coal mine. This shows that the "three dimensional" gas comprehensive drainage technique is a suitable and effective measure for the gas emission control in this coal mine or the similar coal geological areas.

• 出版日期2011
• 单位中国矿业大学（北京）