浅埋煤层开采顶板切落压架灾害的突变分析

采矿与安全工程学报 ›› 2016, Vol. 33 ›› Issue (1): 122-127.

浅埋煤层开采顶板切落压架灾害的突变分析

中国矿业大学(北京)力学与建筑工程学院，北京 100083

收稿日期:2014-04-17 出版日期:2016-01-15 发布日期:2016-03-01
作者简介:杨登峰(1985—)，男，山东省菏泽市人，博士，从事矿山压力与支架-围岩关系方面的研究。
基金资助:
国家重点基础研究发展计划(973)项目(2013CB227903)；国家自然科学基金项目(51174208，U1361209)

Catastrophic analysis of support crushing disasters while roof cutting in shallow seam mining

Received:2014-04-17 Online:2016-01-15 Published:2016-03-01

摘要/Abstract

摘要： 针对浅埋煤层开采周期来压过程中顶板沿煤壁台阶下沉导致顶板切落压架灾害的问题，根据直接顶岩体在支承压力作用下破坏失稳的非线性变化特征，建立了由基本顶-直接顶-支架-矸石组成的系统力学模型。利用突变理论研究了荷载作用下系统的失稳机制，获得了系统失稳的充要条件及直接顶岩体的变形突跳量表达式，分析了系统失稳的主要影响因素。结果表明：直接顶的失稳破坏，导致了顶板的切落，系统失稳除与支架和直接顶岩体的刚度比及材料参数有关外，还与所受载荷及基本顶周期来压步距相关。结合工程实例，验证了理论推导的合理性，并给出了工程建议。

关键词: 浅埋煤层, 突变理论, 直接顶, 顶板切落, 失稳机理

Abstract: Aiming at the problem of roof cutting support crushing disasters caused by roof step convergence along the coal wall during the periodic weighting in shallow seam mining, based on the nonlinear variation characteristics during unstable failure of immediate roof under the abutment pressure, a system mechanics model composed by the main roof-immediate roof-powered support-waste rock was established. In addition, the instability mechanisms of the system under the loads were studied by catastrophic theory. The necessary sufficient condition for instability failure of the system and the formula of the jump value of displacement of immediate roof were gained, and the main factors for instability failure of the system were analyzed. The results show that the unstable failure of immediate roof leads to the roof cutting, the failure of the system is not only related to the stiffness ratio of the powered support, the immediate roof and the material parameters, but also related to the upper load and the cycle weighting interval. The rationality of the theoretical derivation has been verified by engineering example, some suggestions were given to the mining face.

Key words: shallow seam, catastrophic theory, immediate roof, roof cutting, instability mechanism

杨登峰, 陈忠辉, 洪钦锋, 张闪闪 . 浅埋煤层开采顶板切落压架灾害的突变分析[J]. 采矿与安全工程学报, 2016, 33(1): 122-127.

YANG Deng-Feng, CHEN Zhong-Hui, HONG Qin-Feng, ZHANG Shan-Shan. Catastrophic analysis of support crushing disasters while roof cutting in shallow seam mining[J]. Journal of Mining & Safety Engineering, 2016, 33(1): 122-127.

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