1) three soft seam
"三软"煤层
1.
Analysis on deformation failure mechanism of surrounding rocks in 'three soft seam roadway;
“三软”煤层巷道围岩变形破坏机理分析
2.
Combined with engineering examples introduce the application of the technology of high performane bolting with wire mesh along double gob-side entry in three soft seam.
结合工程实例介绍“三软”煤层双沿空掘巷高性能锚杆锚带网支护技术的应用。
2) Three-soft Coal Seam
"三软"煤层
1.
Discussion on Comprehensive Gas Outburst Control in Heading Face with Three-soft Coal Seam;
“三软”煤层掘进综合“防突”探讨
3) three soft coal seam
三软煤层
1.
Numerical simulation for bolting net spray composite support of three soft coal seam tunnel
三软煤层巷道锚网喷联合支护的数值模拟
2.
Analysed the reason of roadway supporting problem,based on heave problem of roadway in three soft coal seam,depth of pressure-relief bore hole was optimizated with numerical simulation,specific solution was proposed,too.
分析了偃龙矿区软岩巷道难以支护的原因,针对三软煤层巷道底鼓问题,采用数值计算方法对底板卸压钻孔深度进行优化设计,并给出了具体的解决方案,即位于底板中部直径为150~300 mm的卸压钻孔,深度应大于巷道底板宽度的一半,小于锚索锚固段的作用范围。
6) "three-soft" coal seam
三软煤层
1.
Its mine pressure behavior law is more comply with the law of the actuality under the "three-soft" coal seam mining laws in the Mining of Sea Area.
龙矿集团北皂矿H2103工作面是海域开采第二个工作面,在首采工作面开采以后,H2103工作面开采,开采范围扩大,开采相对充分,研究发现:其矿压显现的规律更符合海域下三软煤层开采的实际规律,对实现安全高效开采具有参考指导价值。
补充资料：煤层
| 煤层 coal seam 由植物遗体转变而成的层状固体可燃矿产。含煤岩系的重要组成部分，位于顶、底板岩石之间。煤层的厚度、层数、煤质和埋藏深度等是确定煤田经济价值及煤矿建设的重要依据。煤层可分为不含夹石层和含夹石层两类。夹石又称夹矸。夹石不仅使煤的灰分含量增高，也给开采带来一定困难。煤层顶、底板岩石之间的垂直距离称煤层厚度。煤层厚度可分为：①煤层总厚度。指包括夹石层在内的煤层全部厚度。②煤层纯厚度。指所有煤分层厚度的总和 。③ 煤层可采厚度。指在当前经济技术条件下适于开采的煤层厚度。煤层沿走向和倾向通常呈层状、似层状展布或分叉、复合、尖灭，有的呈透镜状、豆荚状、鸡窝状和串珠状。 |
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