巷道吸能支护的减震防冲效应分析

王凯兴; 吴佳成; 潘一山; 窦林名

doi:10.6052/j.issn.1000-4750.2022.02.0181

巷道吸能支护的减震防冲效应分析

doi: 10.6052/j.issn.1000-4750.2022.02.0181

王凯兴^{1, 2, ,},
吴佳成^1,,
潘一山^1,,
窦林名^2,

1.
辽宁工程技术大学力学与工程学院，辽宁，阜新 123000
2.
中国矿业大学深部煤炭资源开采教育部重点实验室，江苏，徐州 221116

基金项目: 国家自然科学基金面上项目(51874163)；辽宁省“兴辽英才计划”项目(XLYC2007021)；辽宁工程技术大学学科创新团队资助项目(LNTU20TD-08，LNTU20TD-19)

详细信息

作者简介:
吴佳成(1997−)，男，江苏人，硕士，主要从事岩石动力学与冲击地压研究(E-mail: jiacheng_wu@yeah.net)

潘一山(1964−)，男，辽宁人，教授，博士，博导，主要从事采矿岩石力学研究(E-mail: panyish_cn@sina.com)

窦林名(1963−)，男，青海人，教授，博士，博导，从事矿山压力、冲击矿压、采矿地球物理等研究(E-mail: lmdou@cumt.edu.cn)

通讯作者:
王凯兴(1984−)，男，辽宁人，副教授，博士，主要从事岩石动力学与冲击地压研究(E-mail: kaixing_wang@163.com)

中图分类号: TD324
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出版历程
- 收稿日期: 2022-02-25
- 修回日期: 2022-06-14
- 网络出版日期: 2022-06-24
- 刊出日期: 2023-06-25

ANALYSIS OF SHOCK ABSORPTION AND ANTI-IMPACT EFFECT OF ENERGY-ABSORBING SUPPORT IN ROADWAY

WANG Kai-xing^{1, 2
, ,},
WU Jia-cheng^1
,,
PAN Yi-shan^1
,,
DOU Lin-ming^2
,

1.
School of Mechanics and Engineering, Liaoning Technical University, Fuxin, Liaoning 123000, China
2.
Key Laboratory of Deep Coal Resource Mining of Ministry of Education, China University of Mining Technology, Xuzhou, Jiangsu 221116, China

摘要

摘要: 冲击地压是煤矿开采的主要动力灾害，巷道吸能支护是防御冲击地压灾害的新型支护方式和有效手段。吸能支护是在刚性支护基础上附加阻尼耗能构件形成的巷道支护，基于巷道顶板与支护相互作用的动力学模型，分析了在巷道刚性支护与吸能支护作用下的顶板-支护系统动力响应，同时就阻尼构件在吸能支护上的分布特征对减震防冲效应的影响进行了分析，研究了阻尼构件在支护中的串联、并联、混联3种分布特征下的支护吸能减震防冲效应。结果表明：相比于刚性支护，吸能支护不仅能有效抑制顶板的冲击响应，还对支护体的冲击响应具有自保护能力；串联吸能支护模式与混联吸能支护模式对顶板冲击位移的控制及支护体加速度的抑制作用相当，且均优于并联吸能支护模式，其中，在串联吸能支护模式下，顶板冲击位移可下降约89%，支护体加速度可下降约55%。进一步优化串联吸能支护模式可知，当采用支护体上端串联布置吸能构件时，构件吸能效果发挥的最好，并且支护体的变形、应力、等效塑性应变变化平稳且幅值较小，同时相比于在下端以及两端串联吸能构件时支护等效塑性应变分别下降约77%和96%。该研究为冲击地压动力灾害的防冲吸能支护动力可靠性设计提供思路。
- 冲击地压 /
- 围岩动力响应 /
- 减震防冲 /
- 吸能支护 /
- 吸能分布模式
Abstract: Rock burst is the main dynamic disaster of coal mining, the energy-absorbing support in roadway is a new support method and effective means to prevent rock burst disasters. The energy-absorbing support is a kind of roadway support formed by adding damping energy dissipation components up rigid supports. Based on the dynamic model of interaction between roadway roof and support, the dynamic response of the roof-support system with roadway rigid support and energy-absorbing support is analyzed, the influence of distributed characteristics of damping components on the effect of shock absorption and anti-impact is investigated, and the effect of energy absorption, shock absorption and anti-impact of damping components in support with series, and parallel as well as hybrid distributed characteristics are studied. The results show that: compared with the rigid support, the energy-absorbing support can effectively suppress the impact response of roof and has self-protection ability to the impact response of support body. The energy-absorbing support with series and hybrid connection have similar control effects on roof impact displacement and acceleration of support body, which are better than the energy-absorbing support with parallel connection. The roof impact displacement decreases by about 89% and the acceleration of support body decreases by about 55% in the energy-absorbing support with series connection. Further optimization of the series mode shows that: when the energy-absorbing components are arranged in series at the upper end of the support, the energy-absorbing effect of the component is the best, the deformation, stress and equivalent plastic strain of support body change smoothly and the amplitude is small, and the equivalent plastic strain of support body decreases by about 77% and 96% respectively compared with that of the lower end and the two ends connected in series. This study provides ideals for the dynamic reliability design of anti-impact and for the energy-absorbing support in the dynamic disaster of rock burst.
- rock burst /
- dynamic response of surrounding rock /
- shock absorption and anti-impact /
- energy-absorbing support /
- distribution mode of energy-absorbing

HTML全文

图 1 顶板-支护系统力学模型

Figure 1. Mechanical model of roof-support system

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图 2 串联吸能支护模式

Figure 2. Energy-absorbing support with series connection

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图 3 混联吸能支护模式

Figure 3. Energy-absorbing support with hybrid connection

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图 4 顶板位移响应

Figure 4. Displacement response of roof

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图 5 支护体加速度响应

Figure 5. Acceleration response of support body

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图 6 巷道冲击地压支护破坏现场

Figure 6. Failure site of roadway support under rock burst

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图 7 两种吸能构件模型　/m

Figure 7. Mode of two energy-absorbing components

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图 8 两种吸能构件的力-位移曲线

Figure 8. Force-displacement curve of two kinds of energy-absorbing components

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图 9 三种吸能支护模式冲击模拟模型图

Figure 9. Impact model diagram of three energy-absorbing support

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图 10 冲击作用下支护体动力响应

Figure 10. Dynamic response of support body under impact

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图 11 冲击作用下吸能构件的动力响应

Figure 11. Dynamic response of energy-absorbing components under impact

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图 12 串联吸能支护模式中吸能构件的三种分布方式

Figure 12. Three distribution modes of energy-absorbing components in energy-absorbing support with series connection

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图 13 不同串联吸能支护模式下支护体动力响应

Figure 13. Dynamic response of support body in energy-absorbing support with different series connections

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图 14 不同串联吸能支护模式下构件的动力响应

Figure 14. Dynamic response of components in energy-absorbing support with different series connections

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