Study of mechanical principle of floor heave of roadway driving along next goaf in fully mechanized sub-level caving face

作     者：王卫军 侯朝炯 

作者机构：XiangtanPolytechnicUniversityXiangtan411201China ChinaUniversityofMiningandTechnologyXuzhou221008China 

出 版 物：《Journal of Coal Science & Engineering(China)》 (煤炭学报（英文版）)

年 卷 期：2001年第7卷第1期

页      面：13-17页

学科分类：081901[工学-采矿工程] 0819[工学-矿业工程] 08[工学] 

主　　题：floor heave roadway driving along next goaf in coal face with fully mechanized top coal caving mechanical principle 

摘      要：Abstract On the basis of analyzing floor strata mechanical circumstance of the roadway, the mechanical model was established. The relative displacement of roadway floor, narrow pillar floor coal mass and floor strata was calculated, the results showed that the high abutment pressure on coal mass beside the roadway was the main reason to lead to relative displacement of floor strata. And the roadway floor heave come mainly from three aspects. Firstly, the roadway floor strata is easily fractured by the stretch stress. Secondly, because the high abutment pressure is greater than the uniaxial compressive strength of floor strata, when the roadway floor strata are fractured, the coal mass floor strata at the same depth will be fractured, and broken rock will fluid into the open roadway. Thirdly, comparing with the coal mass floor, the roadway floor is relative ascending.