Therefore, the conventional staggered distance model of ultra-close thin coal seam group during combined mining is put forward; and the theoretical research and physical simulation are carried out.
因此提出极近距离薄煤层群联合开采常规错距开采模型，并进行理论和物理模拟试验研究。
Based on an example from Datong Coalmines Group, the paper analyses possibility and usage of heavy plow under the conditions of thin seam coal face with Two Hard Roofs and gives out some proposals.
介绍了新型刨煤机的主要性能和结构特点以及使用条件，结合晋城矿区煤层赋存条件，论证了刨煤机在晋城矿区使用能大幅度地提高综采工作面煤炭块率。
Tectonic group patterns of coal seam depended on tectonic stress field, mechanical properties of rock of coal-bearing formation and surrounding environments.
煤层的构造组合型式在很大程度上取决于构造应力作用、含煤地层的岩石力学性质和应变环境等。
There are three coal mines in Xin'an Coalfield. The Shanxi group irregular(2-1) coal seam has soft roof, soft coal and soft floor.
在新安煤田新建的三对矿井，主采煤层均为山西组2-1三软不稳定煤层。
There are three coal mines in Xin'an Coalfield. The Shanxi group irregular(2-1) coal seam has soft roof, soft coal and soft floor.
在新安煤田新建的三对矿井，主采煤层均为山西组2-1三软不稳定煤层。
应用推荐