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我矿开平采区系生产硬质耐火粘土矿的一座中小型矿井,于1968年正式投产。井下有A、A_0两层矿体分别进行开采。其矿量各占50％左右。我矿对A_0层矿体正式规划开采还算首次。在这种急倾斜、薄矿体、顶板不稳固的地质条件下进行开采,我们毫无经验,就沿用了在A层矿体所使用的浅孔留矿法,结果是矿石回采率低,质量波动大等。十余年来,虽经改革,但矿石回采率在二水平也仅达50.6％。这就引起了要改变这种采矿方法的强烈愿望。为
I mine open mining area of hard refractory clay mine production of a small and medium-sized mine, officially put into operation in 1968. Downhole A, A_0 two ore bodies were mined separately. The amount of each of its ore about 50%. For the first time, mine formally planned and exploited A_0 ore body. Mining in this steep, thin orebody, unsteady roof conditions led us to use the shallow-hole retention method used in the A-level ore body with little experience and as a result the ore recovery rate was low and the mass Volatility and so on. More than 10 years, although the reform, but the ore recovery rate of only 50.6% at the second level. This has given rise to a strong desire to change this mining method. for