PDF《长初次来压步距下三角式扇形卸压初采技术研究》

第45 卷第

8 期煤炭科学技术Vol?

45 No?

8 2017 年8月Coal Science and Technology Aug.

2017 长初次来压步距下三角式扇形卸压初采技术研究 杨继和1 ,王延润2 ,刘明明2 ,李波1 (1? 山西朔州平鲁区龙矿大恒煤业有限公司,山西 朔州 036000;

2? 龙口矿业集团有限公司,山东 龙口 265700) 摘要:为解决中硬岩层采场初次来压步距长、矿压显现剧烈的问题,采用理论研究与实践相结合的 方法,以大恒煤业 4-

1 煤层

41107 工作面为工程背景,研究了三角式扇形初采分段卸压的顶板控制方 式及三角式扇形初采技术. 结合现场具体条件,将开切眼与工作面上下两巷非垂直布置,初采时,一 端固定,推采另一端,将常规矩形工作面各级整体基本顶转化为依次分段断裂基本顶,以消除矩形初 采工作面基本顶整体初次断裂来压给生产带来的冲击性危害. 结果表明:采用三角式扇形初采方式, 初采期间

41107 工作面矿压显现不明显,且增加了工作面开切眼三角煤区段放顶煤循环产量,提高煤 炭资源采出率的同时,实现了长初次来压步距条件下安全回采. 关键词:初次来压步距;

综放开采;

三角式扇形初采;

分段卸压 中图分类号:TD822 文献标志码:A 文章编号:0253-2336(2017)08-0142-05 Study on triangle fan shaped pressure released initial mining technology with long first weighting interval Yang Jihe1 ,Wang Yanrun2 ,Liu Mingming2 ,Li Bo1 (1? Shanxi Shuozhou Pinglu Area Longkuang Daheng Coal Industry Company Limited,Shuozhou 036000,China;

2? Longkou Mining Group Corporation Limited,Longkou 265700,China) Abstract:In order to solve a long first weighting interval,serious mine pressure behavior problems occurred during mining with medium hard rock strata,a theoretical study and practices combined method was applied to study the sectional pressure released roof control method of the triangle fan shaped initial mining and its technology with No.

41107 coal mining face in No. 4-1 seam of Daheng Coal Industry as the engineering background. In combination with the site certain condition,the top and lower gateways were vertically layouted for the open-off cut and the coal mining face. At the initial mining period,one end of the face was fixed and at the other end was pushed forward. Each in? tegrated basic roof of the conventional rectangle coal mining face was converted to a sectional breaking basic roof in sequences in order to eliminate the mine pressure bump danger occurred from the integrated initial breaking weighting of the basic roof above the rectangle initial mining face. The results showed that with application of the triangle fan shaped initial mining method,the pressure behavior of No.

41107 coal mining face was not obvious at the initial mining period. The top coal caving circulation production was increased at the triangle seam section in the open-off cut of the coal mining face. Meanwhile,the coal resources mining rate was increased,a safety mining was realized with long first weighting interval. Key words:first weighting interval;

fully-mechanized top coal caving mining;

triangle fan shaped initial mining;

sectional pressure re? leased 收稿日期:2017-04-11;

责任编辑:代艳玲 DOI:10?

13199 / j? cnki? cst? 2017? 08?

024 作者简介:杨继和(1964―),男,山东章丘人,高级工程师,现任山西朔州平鲁区龙矿大恒煤业有限公司总工程师. E-mail:yjh036@ 163.com 引用格式:杨继和,王延润,刘明明,等.长初次来压步距下三角式扇形卸压初采技术研究[J]? 煤炭科学技术,2017,45(8):142-146? Yang Jihe,Wang Yanruen,Liu Mingming,et al.Study on triangle fan shaped pressure released initial mining technology with long first weighting in? terval[J]? Coal Science and Technology,2017,45(8):142-146?