Feasibility study for light-supports applied in thinner thick-seam

Abstract：Blasting mining with sublevel caving is widely applied in medium coal mines in Henan province and even in China.But, the level of mechanization at blasting coal faces with sublevel caving is lower, and more severe hidden danger is existed at the coal faces.Based on the geological condition of supporting by monomer hydraulic props, blasting mining with sublevel caving in thinner thick-seam at Hongling Coal Mine of Yongcheng Coal and Electrical Group Compang, the strata behaviors of the coal face were systematically observed and main parameters such as weighting interval, weighting intensity and reasonable working resistance of supports, etc., were analyzed.Because the strata around the coal face at Hongling Coal Mine belong to easily controlled ones, working resistance of hydraulic supports with sublevel caving was calculated.The scheme of coordination equipments with light-supports for fully mechanized coal face with sublevel caving was put forward, which can be instead of that at blasting coal face.The conclusions provide technological support in the future to fulfill fully mechanized mining with sublevel caving by light-supports at Hongling Coal Mine.The level of mechanization and production capacity with safety and high-efficiency at coal face will be improved.

Keyword：thinner thick-seam;blasting coal face with sublevel caving;working resistance;monomer hydraulic prop;light-support;