“三软”厚煤层分层综采大跨度切眼支护技术

doi:10.11799/ce201403011

煤炭工程 ›› 2014, Vol. 46 ›› Issue (3): 32-34.doi: 10.11799/ce201403011

“三软”厚煤层分层综采大跨度切眼支护技术

王猛

收稿日期:2013-06-04 修回日期:2013-07-03 出版日期:2014-03-14 发布日期:2014-03-15
通讯作者: 王猛 E-mail:wangmeng2105@163.com
基金资助:
国家重点基础研究发展计划（973）项目

Strata Behaviors and Control Technology in Large Span Length Cutting Hole of “Three Soft” and Thick Coal Seam Slicing

Received:2013-06-04 Revised:2013-07-03 Online:2014-03-14 Published:2014-03-15

摘要/Abstract

摘要：

潘北煤矿11113工作面所采A3煤为4.8~6.27m厚煤层，采用ZZP6400/18/38支架分层综采，切眼跨度为9m，高3m。为了保证切眼施工和支护安全，采用导硐和二次刷扩成巷法施工切眼，设计了锚网索组合支护参数，并对各施工阶段切眼表面和深部围岩变形特征、锚杆（索）和单体支柱受力特征等进行了观测。结果表明，与小跨度切眼相比，9m跨度切眼的矿压特征主要表现在巷道围岩相对稳定时间长达10天，巷中顶底板移近量达52mm，锚杆（索）受力呈现中部大、两侧小的特点。基于矿压观测分析，优化了支护参数，巷中增设了加密木垛，取得了良好的支护效果。

关键词: 大断面切眼, 分层综采, 厚煤层, 锚网索支护, 矿压观测

Abstract:

No.3 seam of group A of 11113working face in Pan-Bei coal mine is 4.8~6.27m, ZZP6400/18/38 roof-net supports is used in fully mechanized slicing mining, the span length of cutting hole is 9m, the height of cutting hole is 3m. Pilot tunnel and the secondary tunneling are used to ensure the safety of the construction and supporting. Also, we devise the parameter of united support of net and bolt and observe the characteristic of the stress of bolt anchor cable and single prop in both surface and internal of the cutting hole. The results show that, the stability time of roadway surrounding rock of 9 meter-cutting hole is 10 days, which is longer than the cutting hole in smaller scale, the convergence between roof and floor is 52mm, the stress of bolt and anchor cable is larger in middle than in two sides. Basing on the analysis of the observation of mine pressure, optimizing the parameters of united supports, adding dense wood crib, and have a good effect of supporting.

Key words: Large Section Open-off Cut, Slicing, thick seam, united support of net and bolt, Mineral Pressure Observation

王猛，杨科，等. “三软”厚煤层分层综采大跨度切眼支护技术[J]. 煤炭工程, 2014, 46(3): 32-34.

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“三软”厚煤层分层综采大跨度切眼支护技术

Strata Behaviors and Control Technology in Large Span Length Cutting Hole of “Three Soft” and Thick Coal Seam Slicing

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