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矿井围岩赋存条件是煤矿生产的先决条件,它可以影响到矿井生产的各个阶段.传统的矿井围岩强度测试与分级方法需要进行大量的实验室岩石强度测试测试工作,耗费时间且效率较低,并且在围岩破碎区域常常无法取得合格的强度测试试件.而基于地球物理测井技术的采矿围岩强度预测与分类技术具有快速、经济、高效的特点,近年来已成为美、澳等采矿强国的研究热点之一.当前这一技术的主要研究手段包括声波测井法、地球物理围岩分级方法、自然伽马能谱结合瞬时中子伽马活度方法、钻孔窥视方法等.本文介绍了世界上这一领域的最新研究进展,讨论了它的发展趋势,阐明了我国在这一领域中需要跟进的研究方向.
Surrounding rock conditions of mine is a prerequisite for coal mine production, which can affect all stages of mine production.Traditional rock surrounding rock strength testing and grading methods require a large number of laboratory rock strength test testing, time-consuming and more efficient Low, and often can not get the qualified strength test specimen in the crushing area of surrounding rock.And the technology of strength prediction and classification based on geophysical well logging technology is rapid, economical and efficient, and has become the United States, Australia Etc. The main research methods of this technology include sonic log, geophysical surrounding rock grading method, natural gamma ray spectroscopy combined with instantaneous neutron gamma activity method, drilling peep method and so on This article introduces the latest research progress in this field in the world, discusses its development trend, and clarifies the research direction our country needs to follow up in this field.