According to the laws and regulations, the "three simultaneously" safety inspection of the construction project of coal mine achieved some results in Jiangxi province already.

江西省煤矿企业依照法律、法规的规定，煤矿建设项目安全设施“三同时”监察工作逐步规范，取得了一定的成绩。

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The misfire causes in coal mine blasting are analyzed. Based on the "coal mine safety regulation" and "blasting safety regulations", the preventing and handling measures are put forward.

综合分析了煤矿井下爆破作业中产生拒爆的主要原因，并根据《煤矿安全规程》和《爆破安全规程》提出了预防拒爆的措施以及正确处理拒爆的办法。

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According to the concerned rules in "safety regulations of Coal mine" author derived formulae to determine the overwind height, so a theoretical basis for mine hoist design was provided.

目前各种资料对此均无明确规定，作者根据《煤矿安全规程》的有关规定，导出了过卷高度的计算公式，为矿井提升机设计提供理论依据。

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