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yun yong dq 150 xing kuang yong duo qi mie huo zhuang zhi pu mie xu jia gou mei kuang wai yin huo zai
Pages: 34-38
Year: Issue:  1
Journal: Safety in Coal Mines

Keyword:  灭火装置煤矿外因火灾惰气煤层顶板煤层厚度开采范围开采深度南北走向河南省淇河;
Abstract: <正> 许家沟煤矿位处河南省安阳地区、鹤壁矿层的淇河东岸,年产15万吨的立井,主井深210m、副井深185m,开采深度-150m 水平。目前的开采范围是:沿南北走向的长度为430m、东西倾斜长度为380m。煤层厚度为6~8m,煤层倾斜28°,煤层顶板为砂
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