채광계획인가가 기속재량행위인지 여부(적극) 및 '규사광물 이외의 채취금지 및 규사의 목적외 사용금지'를 내용으로 한 채광계획인가조건의 효력(무효)
Whether the approval on mining plan is a binding discretionary act (affirmative) and effect of the conditions for the approval on the mining plan with the content of prohibition of collection other than silica sand and prohibition of use for another purpose of silica sand (invalid).