沿空留巷采空区自动化密闭系统

聂百胜; 夏晓峰; 周皓文; 秦枫

doi:10.13272/j.issn.1671-251x.2024040042

沿空留巷采空区自动化密闭系统

doi: 10.13272/j.issn.1671-251x.2024040042

聂百胜^{1, 2,},
夏晓峰^{1, 2},
周皓文^{1, 2},
秦枫³

1.
重庆大学煤矿灾害动力学与控制国家重点实验室，重庆　400044
2.
重庆大学资源与安全学院，重庆　400044
3.
中国矿业大学（北京）应急管理与安全工程学院，北京　100083

基金项目: 国家重点研发计划项目（2022YFC3004701）。

详细信息

作者简介:
聂百胜（1973—），男，山西运城人，教授，博士研究生导师，博士，研究方向为煤岩瓦斯动力灾害预防理论与技术等，E-mail：bshnie@cqu.edu.cn

中图分类号: TD712
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出版历程
- 收稿日期: 2024-04-13
- 修回日期: 2024-06-28
- 网络出版日期: 2024-07-04

Automatic sealing system for goaf along gob-side entry retaining

NIE Baisheng^{1, 2
,},
XIA Xiaofeng^{1, 2},
ZHOU Haowen^{1, 2},
QIN Feng³

1.
State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing 400044, China
2.
School of Resources and Safety Engineering, Chongqing University, Chongqing 400044, China
3.
School of Emergency Management and Safety Engineering, China University of Mining and Technology-Beijing, Beijing 100083, China

摘要

摘要: 现有的沿空留巷采空区密闭方法大多集中于构筑密闭墙及封堵墙体裂隙，施工周期较长且反复进行，消耗大量人力成本，自动化程度低，易发生二次破坏。针对上述问题，设计了一种沿空留巷采空区自动化密闭系统。该系统以柔性密闭气囊为载体，将未充气的气囊置于采空区密闭墙和单体液压支柱之间，对气囊充气使其与沿空留巷顶底板及采空区密闭墙外侧贴合接触；智能感知矿压显现导致的巷道围岩变形，气囊随时变化形状柔性应对，即当气囊内部压力上升并超过安全泄压阀额定压力时，自动释放气囊气体缩小体积，以重新与顶底板围岩紧密贴合，达到持续密闭采空区的效果，抑制采空区危险气体泄漏。现场试验结果表明：安全泄压阀在柔性密闭气囊内部压力达到约4 kPa时正常开启，压力达到2.7 kPa左右停止泄气；柔性密闭装备感知压力变化后收缩体积以重新适应围岩形态，可长时间并持续性地密闭采空区；柔性密闭装备安装后与采空区密闭墙贴合度高，密闭墙墙体前瓦斯体积分数降低0.13%，有效抑制了瓦斯溢出。
- 沿空留巷 /
- 瓦斯治理 /
- 采空区密闭 /
- 密闭墙 /
- 柔性密闭气囊
Abstract: The existing sealing methods for goaf along gob-side entry retaining mainly focus on building sealing walls and sealing wall cracks. The construction period is long and repeated, which consumes a lot of labor costs, has a low degree of automation, and is prone to secondary damage. In order to solve the above problems, an automatic sealing system for goaf along gob-side entry retaining has been designed. The system uses flexible sealing airbags as carriers, placing uninflated airbags between the sealing wall and individual hydraulic pillars in the goaf. The system inflates the airbags to make them in contact with the roof and floor of the goaf and the outer side of the sealing wall in the goaf. The intelligent perception of mine pressure causes deformation of the surrounding rock of the roadway, and the shape of the airbag changes flexibly at any time. That is, when the internal pressure of the airbag rises and exceeds the rated pressure of the safety relief valve, it automatically releases the airbag gas to reduce the volume. The airbag re tightly adheres to the roof and floor surrounding rock. It achieves the effect of continuous sealing of the goaf and suppresses the leakage of dangerous gases in the goaf. The on-site test results show that the safety relief valve opens normally when the internal pressure of the flexible sealing airbag reaches about 4 kPa and stops venting when it reaches about 2.7 kPa. Flexible sealing equipment can sense changes in pressure and shrink its volume to adapt to the shape of surrounding rock, allowing for long-term and sustained sealing of goaf. After the installation of flexible sealing equipment, it has a high degree of adhesion with the sealing wall in the goaf. The volume fraction of gas in front of the sealing wall is reduced by 0.13%, effectively suppressing gas overflow.
- gob-side entry retaining /
- gas control /
- sealing goaf /
- sealing wall /
- flexible sealing airbag

HTML全文

图 1 沿空留巷采空区自动化密闭系统原理

Figure 1. Principle of automatic sealing system for goaf along gob-side entry retaining

下载: 全尺寸图片幻灯片

图 2 沿空留巷采空区自动化密闭系统连接方式

Figure 2. Connection of automatic sealing system for goaf along gob-side entry retaining

下载: 全尺寸图片幻灯片

图 3 沿空留巷采空区自动化密闭系统自适应压力释放原理

Figure 3. Adaptive pressure release principle of automatic sealing system for goaf along gob-side entry retaining

下载: 全尺寸图片幻灯片

图 4 单个柔性密闭气囊充气密闭试验系统连接

Figure 4. Connection of single flexible airbag inflatable airtight test system

下载: 全尺寸图片幻灯片

图 5 沿空留巷不同高度处柔性密闭气囊压力随时间的变化

Figure 5. The change of flexible airbag pressure with time at different heights of gob-side entry retaining

下载: 全尺寸图片幻灯片

图 6 多个柔性密闭气囊持续充气密闭试验系统连接

Figure 6. Connection of multiple flexible airbags inflatable airtight test system

下载: 全尺寸图片幻灯片

图 7 柔性密闭气囊持续充气时压力变化曲线

Figure 7. Pressure change curve of flexible airbag with continuous inflation

下载: 全尺寸图片幻灯片

图 8 柔性密闭后密闭墙墙体前瓦斯体积分数变化

Figure 8. Gas volume fraction change in front of sealing wall after flexible sealing

下载: 全尺寸图片幻灯片

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