浅埋房式采空区煤柱群稳定性评价
TD35; 基于“品”字形煤柱分布及尺寸、采空区上方塑性区域边界拱角大小计算得出房式煤柱上覆平均载荷σaps,结合煤柱完全塑性失稳后其邻近煤柱上覆平均载荷变化规律定义了煤柱单元失稳概率Po.采用重整化群方法将煤柱群划分并建立为一维、二维元胞模型,将煤柱失稳概率密度函数(PDF)表示为威布尔函数分布形式并给出不动点方程,进一步求解煤柱失稳临界概率.以石圪台煤矿为实例,计算3-1-1号煤层房式采空区中煤柱稳定性,结合房式采空区煤柱群数值模拟结果,评价了石圪台煤矿房式采空区煤柱群稳定性,最后选取两个房式采空区工作面进行表土层剥离揭露实验,验证煤柱群稳定性理论计算可靠性,为相邻采区及井田内房式采空区下...
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| Published in | 煤炭学报 Vol. 43; no. 2; pp. 390 - 397 |
|---|---|
| Main Authors | , , , |
| Format | Journal Article |
| Language | Chinese |
| Published |
中国矿业大学矿业工程学院,江苏徐州221116
01.02.2018
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 |
| Subjects | |
| Online Access | Get full text |
| ISSN | 0253-9993 |
| DOI | 10.13225/j.cnki.jccs.2017.0720 |
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| Abstract | TD35; 基于“品”字形煤柱分布及尺寸、采空区上方塑性区域边界拱角大小计算得出房式煤柱上覆平均载荷σaps,结合煤柱完全塑性失稳后其邻近煤柱上覆平均载荷变化规律定义了煤柱单元失稳概率Po.采用重整化群方法将煤柱群划分并建立为一维、二维元胞模型,将煤柱失稳概率密度函数(PDF)表示为威布尔函数分布形式并给出不动点方程,进一步求解煤柱失稳临界概率.以石圪台煤矿为实例,计算3-1-1号煤层房式采空区中煤柱稳定性,结合房式采空区煤柱群数值模拟结果,评价了石圪台煤矿房式采空区煤柱群稳定性,最后选取两个房式采空区工作面进行表土层剥离揭露实验,验证煤柱群稳定性理论计算可靠性,为相邻采区及井田内房式采空区下开采提供理论及工程参照. |
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| AbstractList | TD35; 基于“品”字形煤柱分布及尺寸、采空区上方塑性区域边界拱角大小计算得出房式煤柱上覆平均载荷σaps,结合煤柱完全塑性失稳后其邻近煤柱上覆平均载荷变化规律定义了煤柱单元失稳概率Po.采用重整化群方法将煤柱群划分并建立为一维、二维元胞模型,将煤柱失稳概率密度函数(PDF)表示为威布尔函数分布形式并给出不动点方程,进一步求解煤柱失稳临界概率.以石圪台煤矿为实例,计算3-1-1号煤层房式采空区中煤柱稳定性,结合房式采空区煤柱群数值模拟结果,评价了石圪台煤矿房式采空区煤柱群稳定性,最后选取两个房式采空区工作面进行表土层剥离揭露实验,验证煤柱群稳定性理论计算可靠性,为相邻采区及井田内房式采空区下开采提供理论及工程参照. |
| Abstract_FL | Based on the distribution and size of the pillars which resembled as Chinese character "品" and the size of the arch in the plastic zone boundary above the goaf,the average overlying load of pillar under steady state is calculated.Combined with the average overlying load change law of the adjacent pillar after the fully plastic instability of pillar,the unit instability probability of pillar is defined.The renormalization group method is used to divide pillar system,and one dimensional and two dimensional cellular models are established.The probability density function (PDF) of the pillar instability is expressed as the distribution of Weibull function and its fixed point equation is solved,then the reasonable solution are selected as the critical probabilities of pillar instability.Based on the geologic data of Shigetai Mine,the FLAC3D numerical simulation model is established to analyze the cellular model and the instability probability distribution of pillar system,and the stability of pillar system in the room and pillar mining goaf of Shigetai Mine is evaluated. |
| Author | 马行生 王方田 朱德福 屠世浩 |
| AuthorAffiliation | 中国矿业大学矿业工程学院,江苏徐州221116;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 |
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| Author_FL | ZHU Defu WANG Fangtian TU Shihao MA Hangsheng |
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| Copyright | Copyright © Wanfang Data Co. Ltd. All Rights Reserved. |
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| DOI | 10.13225/j.cnki.jccs.2017.0720 |
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| DocumentTitle_FL | Stability evaluation on pillar system of room and pillar mining in goaf at shallow depth seam |
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| Keywords | stability of pillar system 表土层剥离 shallow depth seam detached topsoil 浅埋煤层 renormalization group method 房式采空区 重整化群方法 煤柱群稳定性 room mining goaf |
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| Publisher | 中国矿业大学矿业工程学院,江苏徐州221116 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 |
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| Title | 浅埋房式采空区煤柱群稳定性评价 |
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