1) very soft coal seam
极软厚煤层
1.
Mechanism of the rib spalling and the controlling in the very soft coal seam;
极软厚煤层煤壁片帮与防治机理
2) much thicker soft seam
特厚极软煤层
1.
Directing to the special geology conditions of 8415 face cut hole in Zhuxianzhuang Coal Mine,the experiences of bolting support with wire mesh in the much thicker soft seam are introduced,and the cost of roadway support is also analyzed.
针对朱仙庄矿 84 15工作面切眼特殊的地质条件 ,介绍了高强锚杆 (索 )支护技术成功应用于特厚极软煤层的经验 ,并对巷道支护成本进行了分
3) soft thick seam
软厚煤层
1.
In order to solve the support difficulties of the mining gateway for the fully mechanized top coal caving mining face in soft thick seam of Zhenchengdi Mine,the numerical simulation was applied to the optimized study on the mining gateway support mode and the support parameters.
为解决镇城底矿软厚煤层综放开采工作面巷道支护难题,采用数值模拟对巷道支护方式与支护参数进行了优化研究,分析了工字钢、锚杆与锚索等不同支护形式对巷道围岩变形、应力分布及塑性区范围的影响,得出了采用锚网带与锚索支护软煤巷道的优化支护参数,并进行了现场试验,验证了所选择支护参数的可行性。
4) very soft and very thick outburst coal seam
极软特厚突出煤层
补充资料：极厚
1.极其优厚;极其丰厚。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条