通过对倾斜矿体下盘底部结构的设计，总结了堑沟与凿岩巷道在垂直与平行位置关系，经比较和验算后合理设计底部结构，减少了开采损失贫化。
The vertical and parallel relations of the trench with drill drift are summarized by the bottom structure disposal design on inclined orebody footwall.
叙述了北沼河铁矿凿岩台车掘进巷道的试验与应用情况。
The paper describes the test and application of jumbo rig in tunneling in Beiminghe Iron Mine.
试验表明，采用高效除尘器对巷道凿岩工作面进行就地净化循环通风，能使工作面粉尘质量浓度符合国家工业卫生标准。
The test results show that dust concentrations in tunneling working face can be satisfied with the national health standard by a high efficient deduster.
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