...入管制初探 关键词 煤炭法 资源整合 市场进入管制 社会管制 事前管制 特许权制度 自由流转 [gap=2011]Keywords] law of coal；integration of resources；market access control；social regulation；pre-event regu..
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This article studied the technical and economic features and cost evolution law of coal enterprise.
本文研究了煤炭企业经济技术特征与成本演变规律。
This paper mainly focused on the gas emission law of coal wall for the double tunneling working faces.
简要论述了煤巷综掘工作面瓦斯涌出的特征及规律，提出了综掘工作面瓦斯涌出的控制与解决措施。
With numerical simulation method, the distribution law of coal pillar support pressure in the floor was studied.
运用数值模拟分析方法，研究煤柱支承压力在底板的分布规律。
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