求翻译：近年来我国煤矿事故频繁发生，造成重大人员伤亡和经济损失，据统计，我国2015年上半年发生了13起煤矿安全事故。由于煤矿特殊的工作环境导致矿井事故时有发生，因此对井下作业人员进行实时跟踪定位，了解井下作业人员的分布情况的重要性显得非常重要。是什么意思？

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In recent years, China's coal mine incidents have been occurring frequently, causing major casualties and economic losses, according to statistics, in the first half of 2015, my country, there have been over 13 incidents of coal mine safety. As a result of the work of the Special coal mine environme

In recent years our country coal mine accident frequent occurrence, caused the significant personnel casualty and the economic loss, according to the statistics, our country in 2015 the first half year has had 13 coal mine safety accident.Because the coal mine special working conditions cause the mi

Coal mine accidents in China in recent years, causing heavy casualties and economic losses, according to the statistics, in 2015, 13 coal mine accidents took place in the first half. Mine due to a special work environment in coal mine accidents have occurred, real-time tracking for underground work

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