1) retaining boctom coal
留底煤
2) bottom explosion method with pre-retaining coal
预留煤底爆破法
1.
According to the actual situations of face,the bottom explosion method with pre-retaining coal is applied in passing through faults directly.
根据工作面的实际情况,采用预留煤底爆破法直接过断层,并采用聚氨酯帮锚技术,减少了储量损失,减少了搬家次数,提高了单产和经济效益。
4) top coal reserve
预留顶煤
5) coal pillars
留煤柱
1.
Base on the longwall coal mining with coal pillars applied in the medium and small coal mines in the Shaanbei Coal Field,the technical targets to prevent and reduce the mine disasters are to classify two different feature coal pillars.
针对陕北煤田中小煤矿采用的长壁留煤柱开采,防灾减灾的技术目标是区分两类不同性质的煤柱,即区内煤柱和区域间的隔离煤柱,实现隔离小区域的适时无灾害垮落,防止跨隔离区的大范围垮落。
补充资料：标准煤(见煤当量)
标准煤(见煤当量)
standard coal
、~‘~1人、4《1工兀飞coal)见煤当等
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