煤矿安全2017，Vol.48Issue(8)：9-12,4.DOI:10.13347/j.cnki.mkaq.2017.08.003
功率声波激励下无烟煤孔隙变化及裂隙发育研究
Study on Anthracite Pores Variation and Fractures Development Under Acoustic Power Excitation
田洪波 1蒋曙光 2李玥 3张卫清 1秦桐 2王豫皖3
作者信息
- 1. 中国矿业大学煤矿瓦斯与火灾防治教育部重点实验室,江苏徐州221116
- 2. 中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221116
- 3. 中国矿业大学安全工程学院,江苏徐州221116
- 折叠
摘要
Abstract
In order to improve the extraction efficiency and extraction rate of coalbed methane to the maximum extent,the ultrasonic explosion of coalbed methane reservoir is used to improve the permeability of the reservoir.The evolution of pore size and quantity of coal in the process of ultrasonic fracturing coal was detected by nuclear magnetic resonance (NMR) technique.The fissure development process of coal was monitored and analyzed by thermal imaging,digital camera and P wave rock measurement system.The results show that the porosity and the number of pores increase and the porosity increases by 120.5％ with the formation of ultrasonic fractures.The whole fracturing process is divided into three stages,and different pore sizes sorted by time are "micropores,mesopores,macropores and fissures";P-wave test shows that ultrasonic waves can stimulate the internal and surface of coal to form a fissure network,greatly improve the permeability of coal;because any water-bearing pores are caused by ultrasonic cracking fracture points,compared to the traditional fissure measures,ultrasonic fracturing has a wider influence range and needs less energy.关键词
功率声波/裂隙发育/核磁共振/空化效应/无烟煤/孔隙变化/超声波Key words
acoustic power/fractures development/nuclear magnetic resonance/cavitation effect/anthracite/pore variation/ultrasonic wave分类
矿业与冶金引用本文复制引用
田洪波,蒋曙光,李玥,张卫清,秦桐,王豫皖..功率声波激励下无烟煤孔隙变化及裂隙发育研究[J].煤矿安全,2017,48(8):9-12,4.
