门克庆矿综采工作面区段煤柱合理尺寸研究精选.pdfVIP

Mine Engineering 矿山工程, 2015, 3, 25-34 Published Online April 2015 in Hans. /journal/me /10.12677/me.2015.32005 The Study of Reasonable Section Coal Pillar Size of Men Keqing Mechanized Longwall Mining Face 1 1 2 1 1 Zhenxiong Yan , Lang Bai , Hongjiao Li , Jiayi Ji , Hongwu Zhang 1 Resource and Safety Engineering School, China Mining University, Beijing 2 Mining Oils Branch Institute, Coal Science and Technology Research Institute Co. Ltd., Beijing Email: 373738314@ th th nd Received: Mar. 15 , 2015; accepted: Mar. 26 , 2015; published: Apr. 2 , 2015 Copyright © 2015 by authors and Hans Publishers Inc. This work is licensed under the Creative Commons Attribution International License (CC BY). /licenses/by/4.0/ Abstract With the shallow coal resources exploitation exhausts, coal mining gradually changes into the deep mining. In view of the principle of safe and efficient production and resource recovery, the reasonable width of section coal pillar has become more important. On the engineering back- ground of coal pillars of 31201 working face of Menkeqing Mine, by using load estimation method and plastic theory, the paper calculates the pillar width and obtains that the coal pillar widths are 36.03 m and 18.59. By using the method of theoretical calculation and numerical simulation, the plastic zones of roadway affected by the one-time mining and its abutment pressure distribution in the condition of 15 m, 25 m, 35 m and 40 m coal pillar widths are studied. The results show that the roadway has minimal damage when coal pillar widths are 35 m and 40 m. The reasonable s