极近距离煤层回采巷道布置及支护技术研究.doc

文档介绍：
极近距离煤层回采巷道布置及支护技术研
究#
卢全体1,2,高明仕1,2,刘一博1,2,曹长江1,2,张宇舵1,2**
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(1. 中国矿业大学矿业工程学院,江苏徐州 221116;
2. 煤炭资源与安全开采国家重点实验室,江苏徐州 221116)
摘要:为了研究山西大同唐山沟煤矿极近距离煤层群下行开采下部煤层回采巷道布置问题,
以弹性力学、岩体力学、土力学等为基础进行计算分析,结果表明 12#煤开采后其底板最大
破坏深度为 ,可以定性地确定 13#煤层回采巷道内错布置在低应力区比较合适,并
对煤柱底板的各应力分布规律进行分析。采用均布载荷计算得出 13#煤层巷道合理内错距为
,提出锚带网+注浆锚索+桁架组合支护方式。现场应用表明,确定的内错距
较合理,巷道支护效果较好,未出现强烈的矿压显现。
关键词:下行开采;极近距离煤层; 应力分布;内错距
中图分类号:TD353
Study on the Rational Gateway Position and Support
Technology of Extremely Close Coal Seams
Lu Quan-ti1,2, Gao Ming-shi1,2, Liu Yi-bo1,2, Cao Chang-jiang1,2, Zhang Yu-duo1,2
(1. China University Of Mining and Technology School of mines, JiangSu XuZhou 221116;
2. State Key Laboratory of Coal Resources and Safe Mining, JiangSu XuZhou 221116)
Abstract: In order to study the problem of rational gateway position of lower coal seam of
Tangshangou mine in Datong,Shanxi Province,the paper analyzed and calculated with Elasticity、
rock mechanics and Soil calculations show that the maximum strain in the floor
from the 10 seam mined is . Taken Inner crossing layout of the 13seam gateway in low
stress region was determined qualitatively. The stress distribution law in the floor around the pillar
was reasonable inner stagger distance for the gateway in the number 13 seam is
under uniform mean of