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我国缓倾斜中厚矿体,大多数采用房柱法和有底部结构的分段空场法开采。前者是开采矿岩稳固或中等稳固矿体的主要方法;后者人员不进入采空场出矿,安全性较好,但千吨采切比大,经济效益较差。房柱法开采时的地压控制与顶板管理存在不可忽视的安全问题。尤其开采缓倾斜中厚矿体时,空场高达10m 或10m 以上,难以对顶板进行仔细的安全检查,无疑将给出矿
In our country, moderately inclined moderately thick ore bodies, most of them are mined by column-column method and sub-floor method with bottom structure. The former is the main method of mining ore stable or moderately stable ore body; the latter personnel do not enter the mined-out mine, the safety is better, but the kiloton cut-off ratio is large, and the economic benefit is poor. Underground pressure control and roof management during the mining of pillar method have some safety problems that can not be ignored. Especially when mining gentle inclined medium thick ore body, the open field is as high as 10m or more, it is difficult to carry out the careful safety inspection on the roof and it will undoubtedly give the mine