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综放工作面厚硬顶板破断特征与支架工作阻力确定

程占博 孔德中 杨敬虎

程占博, 孔德中, 杨敬虎. 综放工作面厚硬顶板破断特征与支架工作阻力确定[J]. 矿业科学学报, 2016, 1(2): 172-180.
引用本文: 程占博, 孔德中, 杨敬虎. 综放工作面厚硬顶板破断特征与支架工作阻力确定[J]. 矿业科学学报, 2016, 1(2): 172-180.
Cheng Zhanbo, Kong Dezhong, Yang Jinghu. The breaking characteristics of thick The breaking characteristics of thick hard roof and determination of support capacity in fully mechanized caving facehard roof and determination of support capacity in fully mechanized caving face[J]. Journal of Mining Science and Technology, 2016, 1(2): 172-180.
Citation: Cheng Zhanbo, Kong Dezhong, Yang Jinghu. The breaking characteristics of thick The breaking characteristics of thick hard roof and determination of support capacity in fully mechanized caving facehard roof and determination of support capacity in fully mechanized caving face[J]. Journal of Mining Science and Technology, 2016, 1(2): 172-180.

综放工作面厚硬顶板破断特征与支架工作阻力确定

基金项目: 国家重点基础研究发展计划(973计划)(2013CB227903)
国家自然科学基金(U1361209、51574244)
详细信息
    作者简介:

    程占博(1993—),男,山东菏泽人,硕士研究生,主要从事放顶煤开采和矿山压力控制研究工作。要:针对综放工作面厚硬顶板初次来压步距难以确定的问题,以东周窑煤矿8301工作面为工程背景,建立厚硬基本顶的固支梁模型,运用能量法求得分布于基本顶中的水平应力,进而得到基本顶初次来压步距解析式,采用数值模拟对顶板破断特征和工作面支架工作阻力进行分析,并对不同推进距离下工作面不同位置支架工作阻力进行了现场监测。研究结果表明:相比一般综放工作面,坚硬顶板条件下工作面初次来压步距和支架工作阻力明显增加,顶板破断后对工作面形成冲击较大,矿压显现剧烈;8301工作面初次来压步距为58 m,周期来压步距为15~20 m,动载系数为1.5~1.8;基于能量法求得支架额定工作阻力为13 000 kN,而来压期间支架工作阻力为11 000 kN,是额定工作面阻力的84.6%,能够满足厚硬顶板条件下煤矿安全高效开采的要求。

  • 中图分类号: TD325

The breaking characteristics of thick The breaking characteristics of thick hard roof and determination of support capacity in fully mechanized caving facehard roof and determination of support capacity in fully mechanized caving face

  • 摘要: 针对综放工作面厚硬顶板初次来压步距难以确定的问题,以东周窑煤矿8301工作面为工程背景,建立厚硬基本顶的固支梁模型,运用能量法求得分布于基本顶中的水平应力,进而得到基本顶初次来压步距解析式,采用数值模拟对顶板破断特征和工作面支架工作阻力进行分析,并对不同推进距离下工作面不同位置支架工作阻力进行了现场监测。研究结果表明:相比一般综放工作面,坚硬顶板条件下工作面初次来压步距和支架工作阻力明显增加,顶板破断后对工作面形成冲击较大,矿压显现剧烈;8301工作面初次来压步距为58 m,周期来压步距为15~20 m,动载系数为1.5~1.8;基于能量法求得支架额定工作阻力为13 000 kN,而来压期间支架工作阻力为11 000 kN,是额定工作面阻力的84.6%,能够满足厚硬顶板条件下煤矿安全高效开采的要求。
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  • 收稿日期:  2016-05-26
  • 刊出日期:  2016-10-29

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