工作面长度对覆岩空间结构演化及大采高采场矿压规律的影响

doi:10.16285/j.rsm.2016.0400

›› 2018, Vol. 39 ›› Issue (2): 691-698.doi: 10.16285/j.rsm.2016.0400

工作面长度对覆岩空间结构演化及大采高采场矿压规律的影响

刘畅^{1, 2}，刘正和²，张俊文¹，杨增强¹，蔡震川^{1, 3}，李玉琳⁴

1. 中国矿业大学（北京）资源与安全工程学院，北京 100083；2. 太原理工大学采矿工艺研究所，山西太原 030024； 3. 山西晋煤集团安监局，山西晋城 048006；4. 黑龙江科技大学矿业工程学院，黑龙江哈尔滨 150022

收稿日期:2016-04-25 出版日期:2018-02-10 发布日期:2018-06-06
通讯作者: 张俊文，男，1977年生，博士，副教授，主要从事矿山压力与岩层控制方面的研究。E-mail: zhangjunwen1977@163.com E-mail:15536888908@163.com
作者简介:刘畅，男，1990年生，博士研究生，主要从事矿山压力与岩层控制方面的研究。
基金资助:
“十二五”国家科技支撑计划项目（No. 2012BAB13B04）；国家自然科学基金项目（No. 51574174，No. 51574114，No. 51674263）；国家重点研发计划专项资助（No. 2016YFC0600901）。

Effect of mining face length on the evolution of spatial structure of overlying strata and the law of underground pressure in large mining height face

LIU Chang^{1, 2}, LIU Zheng-he², ZHANG Jun-wen¹, YANG Zeng-qiang¹, CAI Zhen-chuan^{1, 3}, LI Yu-lin⁴

1. School of Resources and Safety Engineering, China University of Mining and Technology(Beijing), Beijing 100083, China; 2. Institute of Mining Technology, Taiyuan University of Technology, Taiyuan, Shanxi 030024, China; 3. Administration of Work Safety, Shanxi Jincheng Anthracite Mining Group, Jincheng, Shanxi 048006, China; 4. School of Mining Engineering, Heilongjiang University of Science and Technology, Harbin, Heilongjiang 150022, China

Received:2016-04-25 Online:2018-02-10 Published:2018-06-06
Supported by:
This work was supported by the Supporting Program of the Twelfth Five-year Plan for Science and Technology Research of China (2012BAB13B04), the National Natural Science Foundation of China (51574174, 51574114, 51674263) and the National Key Research and Development Program (2016YFC0600901).

摘要/Abstract

摘要： 工作面长度的增加是导致采场矿压强度增加的原因之一。通过相似模拟试验证明了覆岩能破断成梯形台形态，并指出了梯形台形成机制及梯形台的参数计算原理。利用梯形台分析了工作面长度对覆岩破断规律的影响，指出了梯形台与关键层理论的关系。基于薄板理论推导了岩层破断步距的计算公式，分析了工作面长度对梯形台空间结构演化及采场矿压显现特征的影响。结果表明：由于覆岩按梯形台破断，工作面长度较短时，加载层厚度较小，来压强度小。对比研究了赵庄2号井1305大采高工作面（工作面长度为85 m）和1302大采高工作面（工作面长度为180 m）矿压特征。结果表明：1305工作面基于梯形台和薄板理论进行选型计算，支架计算工作阻力为4 738 kN，现场选用额定阻力5 500 kN能够满足顶板控制的要求；1302工作面基于梁理论进行选型计算，支架计算工作阻力为7 623 kN，现场需选用额定阻力7 800 kN才能满足顶板控制的要求。

关键词: 工作面长度, 薄板理论, 空间结构, 支架工作阻力

Abstract: The increased length of mining face is one of the significant factors to increase the underground pressure in longwall (LW) face. The physical model tests showed the fractured shape of overlying stratum exhibited as trapezoid platform structure (TPS) after roof caving. Its forming mechanisms were investigated in detail and the calculation principle of geometric parameters of TPS. The effect of mining face length on the fracturing behaviour of overlying strata was studied according to the TPS, and then the relationship between the TPS and key strata theory was also given. The thin plate theory was applied to calculate roof weighting interval. Then, the influence of mining face length on TPS’s parameters was analysed as well as underground pressure. The results show that due to TPS-shaped fracturing characteristics of overlying strata, the thickness of loading layers and roof weighting intensity decrease with the decrease of mining face length. Field measurements were conducted in LW1305 with the face length of 85 m and in LW1302 with the face length of 180 m in mine No.2 of Zhaozhuang. The measured data show that the resistance of the supports should not be less than 4 738 kN and 7 623 kN in LW1305 and LW1302, respectively, and the roof is maintained well with the resistance of 5 500 kN in LW1305 and 7 800 kN in LW1302.

Key words: mining face length, thin plate theory, spatial structure, resistance of support

中图分类号:

TD 313

刘畅，刘正和，张俊文，杨增强，蔡震川，李玉琳,. 工作面长度对覆岩空间结构演化及大采高采场矿压规律的影响[J]. , 2018, 39(2): 691-698.

LIU Chang, LIU Zheng-he, ZHANG Jun-wen, YANG Zeng-qiang, CAI Zhen-chuan, LI Yu-lin,. Effect of mining face length on the evolution of spatial structure of overlying strata and the law of underground pressure in large mining height face[J]. , 2018, 39(2): 691-698.

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工作面长度对覆岩空间结构演化及大采高采场矿压规律的影响

Effect of mining face length on the evolution of spatial structure of overlying strata and the law of underground pressure in large mining height face

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