原岩
- Protolith;【煤】virgin rock ［mass］
原岩-
运用沉积学的原理和方法，对银洞坡歪头山组中段含金绿片岩系进行了细致的原岩恢复和成因地层分析。
The sedimentary principles and methods are employed to reconstruct the protolith and to analyse the genetic stratigraphy in middle Waitoushan Formation , Yindongpo .
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随着煤柱尺寸的增大，巷道所处应力环境由低应力区向支承应力峰值区再向原岩应力区转变；
With the pillar size be larger , the stress area that the roadway be located change from low stress area to peak stress area and final be in original rock stress area ;