For the gently inclined and extremely-thin vein, the mining methods including breasting method, waste-lifting stoping, resue stoping, long walling were usually adopted.
对于缓倾斜极薄矿脉的开采，通常采用全面法、削壁充填法、选别回采、长壁法等采矿方法。
The former cann't get a satisfied precision and recall for users, while the later requires users have a high awareness of knowledge structure and shows a bad effect to knowledge search and resue.
前者无法满足用户对于查准率和查全率的要求，而后者需要用户对知识结构具有较高的认知，这影响了知识检索和重用的效果。
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