Abutment pressure distribution is different when a longwall panel is passing through the abandoned gate roads in a damaged coal seam. According to the geological condition of panel E13103 in Cuijiazhai Coal Mine in Ch...Abutment pressure distribution is different when a longwall panel is passing through the abandoned gate roads in a damaged coal seam. According to the geological condition of panel E13103 in Cuijiazhai Coal Mine in China, theoretical analysis and finite element numerical simulation were used to determine the front pressure distribution characteristics when the longwall face is 70, 50, 30, 20, 10, and 5 m from the abandoned roadways. The research results show that the influence range of abutment pressure is 40 to 45 m outby the face, and the peak value of front abutment pressure is related to the distance between the face and abandoned roadways. When the distance between the longwall face and abandoned roadways is reduced from 50 to 10 m, the front abutment pressure peak value kept increasing. When the distance is 10 m, it has reached the maximum. The peak value is located in 5 to 6 m outby the faceline. When the distance between the longwall face and abandoned roadways is reduced from 10 to 5 m, the front abutment pressure sharply decreases, the intact coal yields and is even in plastic state. The peak value transfers to the other side of the abandoned roadways. The research results provide a theoretical basis for determining the advance support distance of two roadways in the panel and the reinforcement for face stability when the longwall face is passing through the abandoned roadways.展开更多
一、锺正明实验室简史锺正明出生在临床医学世家,但他从小就对精彩纷呈的生命科学领域充满好奇心,因此他决定投身于基础医学科学研究。他于1978年获台湾大学学医学士学位后,赴美国洛克菲勒大学攻读博士学位。读博期间,他师从博士生导师...一、锺正明实验室简史锺正明出生在临床医学世家,但他从小就对精彩纷呈的生命科学领域充满好奇心,因此他决定投身于基础医学科学研究。他于1978年获台湾大学学医学士学位后,赴美国洛克菲勒大学攻读博士学位。读博期间,他师从博士生导师杰拉德•埃德尔曼(Gerald M.Edelman)教授,而导师因研究免疫球蛋白结构而荣获诺贝尔生理学或医学奖(Physiology or Medicine)。展开更多
基金supported by National Key R&D Program of China (No. 2017YFC060300204)Yue Qi Young Scholar Project,CUMTB and Yue Qi Distinguished Scholar Project (No. 800015Z1138)China University of Mining & Technology, Beijing
文摘Abutment pressure distribution is different when a longwall panel is passing through the abandoned gate roads in a damaged coal seam. According to the geological condition of panel E13103 in Cuijiazhai Coal Mine in China, theoretical analysis and finite element numerical simulation were used to determine the front pressure distribution characteristics when the longwall face is 70, 50, 30, 20, 10, and 5 m from the abandoned roadways. The research results show that the influence range of abutment pressure is 40 to 45 m outby the face, and the peak value of front abutment pressure is related to the distance between the face and abandoned roadways. When the distance between the longwall face and abandoned roadways is reduced from 50 to 10 m, the front abutment pressure peak value kept increasing. When the distance is 10 m, it has reached the maximum. The peak value is located in 5 to 6 m outby the faceline. When the distance between the longwall face and abandoned roadways is reduced from 10 to 5 m, the front abutment pressure sharply decreases, the intact coal yields and is even in plastic state. The peak value transfers to the other side of the abandoned roadways. The research results provide a theoretical basis for determining the advance support distance of two roadways in the panel and the reinforcement for face stability when the longwall face is passing through the abandoned roadways.
文摘一、锺正明实验室简史锺正明出生在临床医学世家,但他从小就对精彩纷呈的生命科学领域充满好奇心,因此他决定投身于基础医学科学研究。他于1978年获台湾大学学医学士学位后,赴美国洛克菲勒大学攻读博士学位。读博期间,他师从博士生导师杰拉德•埃德尔曼(Gerald M.Edelman)教授,而导师因研究免疫球蛋白结构而荣获诺贝尔生理学或医学奖(Physiology or Medicine)。
