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摘要: 主要介绍了中国和澳大利亚两个煤矿在长壁开采过程中的微地震监测咸果,并进行了深入的 理论分析和研究。该监测的主要目的是动态测定煤层开采过程中顶板岩石"两带"(冒落带和裂隙 带)的发展规律和高度,以指导相邻采区留设合理的防水或防砂煤柱。观测结果表明:研究区域"两 带"的最大高度均没有到达煤层上方的含水层,顶板突水的可能性非常小,这一结果与实际情况符 合;同时也表明微地震监测是确定"两带"高度及设计防水和防砂煤柱的一种可靠手段。Abstract: It is mainly introduced that the microseismic monitoring results obtained during long-wall mining in Xinglongzhuang Colliers of China and Cordonstone Colliery of Australia, and conducted further theoretical analysis and study. The primary target of the monitoring is to dynamically determine the developing regularity, and heights of the "two zones"(caving zone and fractured zone)in roof rocks. The study results indicate that the maximum heights of the caving zones and fractured zones are not reach the aquifers above the target coal seams in the two collieries, which means the water from the aquifers above coal seams is impossible to flow into mines. This result corresponds with practical situation. Meanwhile the study results of the microseismic method are proved a reliable technique for determination of the heights of the "two zones" and dsigns of the water and sands pillars.
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Keywords:
- microseism /
- monitor /
- roof of coal seams /
- caving zone /
- fractured zone
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