深井复合顶板切顶卸压柔模墙支护沿空留巷技术

申斌学; 周宏范; 朱磊; 吴玉意; 秋丰岐; 王国普; 郭林; 黄剑斌

doi:10.13272/j.issn.1671-251x.2021040072

深井复合顶板切顶卸压柔模墙支护沿空留巷技术

doi: 10.13272/j.issn.1671-251x.2021040072

申斌学^1,2,
周宏范³,
朱磊^1,2,
吴玉意^1,2,
秋丰岐^1,2, ,,
王国普³,
郭林³,
黄剑斌^1,2

1.
1. 中煤能源研究院有限责任公司, 陕西西安 710054;
2.
2. 中煤西安设计工程有限责任公司, 陕西西安 710054;
3.
3. 中煤新集能源股份有限公司, 安徽淮南 232001

详细信息

作者简介:
申斌学(1965-),男,陕西合阳人,教授级高级工程师,主要从事煤炭设计及煤炭开采方面的研究工作,E-mail:sbx-syf@163.com。

通讯作者:
秋丰岐(1994-),男,陕西乾县人,助理工程师,硕士,主要从事充填开采方面的研究工作,E-mail:591395213@qq.com。

中图分类号: TD353
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- 被引次数: 0
出版历程
- 收稿日期: 2021-04-21
- 修回日期: 2021-11-07
- 刊出日期: 2021-11-20

The technology of gob-side entry retaining supported by flexible formwork wall with roof cutting and pressure relief for composite roof in deep mine

SHEN Binxue^1,2,
ZHOU Hongfan³,
ZHU Lei^1,2,
WU Yuyi^1,2,
QIU Fengqi^{1,2
, ,},
WANG Guopu³,
GUO Lin³,
HUANG Jianbin^1,2

1.
China Coal Energy Research Institute Co., Ltd., Xi'an 710054, China;
2.
China Coal Xi'an Design Engineering Co., Ltd., Xi'an 710054, China;
3.
China Coal Xinji Energy Co., Ltd., Huainan 232001, China

摘要

摘要: 我国两淮地区进行沿空留巷时，受矿井埋深大和顶板条件复杂的影响，沿空留巷顶板变形强烈，煤帮易挤出和底鼓严重。针对该问题，以新集一矿360804综采工作面为研究对象，提出了切顶卸压柔模墙支护沿空留巷技术。在超前工作面采用双向聚能爆破技术对沿空留巷顶板进行预裂爆破，以有效降低沿空留巷顶板应力；随着工作面不断回采，每滞后工作面煤壁一定距离，采用混凝土浇筑的柔模墙对巷旁进行支护，以实现对沿空留巷顶板的强力支护。现场应用结果表明：位于爆破孔不同高度的位置处均出现了2条较明显的裂缝，表明爆破切顶效果良好；巷道顶板浅部最大离层量为7 mm、深部最大离层量为19 mm，巷道顶板支护较为完好；巷道顶底板移近量为430 mm、两帮移近量为487 mm，巷道围岩变形在允许范围内，留巷效果良好。
- 煤炭开采 /
- 复合顶板 /
- 沿空留巷 /
- 切顶卸压 /
- 柔模墙支护 /
- 预裂爆破 /
- 围岩变形
Abstract: In Lianghuai area of China, due to the influence of the large buried depth of the mine and the complicated roof conditions, when gob-side entry is retained, the roof deformation of the gob-side entry retaining is large, the coal side is easily extruded and the floor heave is serious.In order to solve this problem, taking the 360804 fully mechanized working face of Xinji No.1 Mine as the research object, the technology of gob-side entry retaining supported by flexible formwork wall with roof cutting and pressure relief is proposed.The bilateral cumulative energy blasting technology is used in the advance working face to carry out pre-splitting of the roof of the gob-side entry retaining to reduce the roof stress of the gob-side entry retaining effectively.With the continuous mining of the working face, when the working face coal wall is lagged a certain distance, the flexible formwork wall made of concrete is used to support the roadway side in order to achieve strong support for the roof of the gob-side entry retaining.The field application results show that there are two obvious fractures at different heights of blasting hole, which indicates that the blasting roof cutting effect is good.The maximum separation of the shallow part of the roadway roof is 7 mm, the maximum separation of the deep part is 19 mm, and the roadway roof support is relatively intact.The roadway roof and floor deformation is 430 mm, the two sides deformation is 487 mm, the roadway surrounding rock deformation is within the allowable range, and the roadway retaining effect is good.
- coal mining /
- composite roof /
- gob-side entry retaining /
- roof cutting and pressure relief /
- flexible formwork wall support /
- pre-splitting blasting /
- surrounding rock deformation

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参考文献(12)

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