1) Thin and midium-thickness coal seam groups
薄及中厚煤层群
2) thin and medium seam
薄及中厚煤层
4) thin coal seam group
薄煤层群
1.
The occurrence mode of coal seams #15–1 and #15–3 in the lower coal group is thin coal seam group with average distance 4.
下组煤15–1#和15–3#煤层是以薄煤层群赋存在一起,平均间距为4。
5) medium-thickness and high-thickness seams
中厚厚煤层
6) thinner coal seam
较薄厚煤层
1.
Based on in-situ observation about stress in inclined coal pillar for fully-mechanized top-coal caving face of thinner coal seam and the elastoplastic limit equilibrium theoryt,aking the thickness and angle of coal seam into account,the results and relations are analyzed systematically and completely;and the formula and the distribution laws of stress peak value are obtained.
在较薄厚煤层综放面倾向煤柱支承压力现场实测的基础上,应用弹塑性极限平衡理论,考虑煤层厚度及倾角的影响,分析得出综放面倾向煤柱支承压力峰值位置的计算式及分布规律。
补充资料：群虱处裈中
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